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  • DSPIC30F4012 v230 Source Code

    yes this is it .... since there are no other decent open source PI controller chips around the following posts contain the UNIPI universal PI chip source code.

    Features ..
    LCD display and menu.
    Rotary encoder menu selection.
    Dual sample pulses.
    Serial console menu.
    etc etc.

    Everything you need to make a PI controller chip or modify for your own purposes.

    The complete source code files as follows ....

    ADC.c
    eeprom_rw.s
    lcd.c
    main.c
    main_loop.c
    pwm.c
    QEImenu.c
    RS232menu.c
    serial.c
    timers.c
    vars.c

    system.h

    README.TXT

    builds under MPLAB IDE v8.66 (C30 v3.25)

    enjoy ... moodz.

  • #2
    README.TXT

    moodz UNIPI copyright 2011 by Paul Moody. [email protected]

    Universal PI chip source code.

    Distributed under GPL3 licence.

    Copyright © 2007 Free Software Foundation, Inc. <http://fsf.org/>

    Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
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    Comment


    • #3
      ADC.c

      /*
      ADC.c - Analog to Digital converter routines.
      Copyright (C) 2011 Paul Moody

      This program is free software: you can redistribute it and/or modify
      it under the terms of the GNU General Public License as published by
      the Free Software Foundation, either version 3 of the License, or
      (at your option) any later version.

      This program is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
      GNU General Public License for more details.

      You should have received a copy of the GNU General Public License
      along with this program. If not, see <http://www.gnu.org/licenses/>.
      */

      #include "p30fxxxx.h"
      #include "system.h"

      //Functions and Variables with Global Scope:

      unsigned int ADbuff_count = 0; // A buff filter count ....0 to BUFFSIZ
      unsigned int ADbuff_count_max = 128; // max size to fill buffer ... default is 128
      unsigned int ADbuff_cycle = 0; // A buff filter cycle ....0 to AVGVAL
      unsigned int ADref_cycle = 0; // Auto track cycle

      unsigned int DUMP_STATE = 0;

      unsigned int ADtemp = 0;

      void ADC_Init(void);
      void __attribute__((__interrupt__)) _ADCInterrupt(void);

      extern volatile unsigned int PR1Delay;
      extern volatile unsigned int PR2Delay;
      extern volatile unsigned int PR3Delay;
      extern volatile unsigned int PR1Duty;
      extern volatile unsigned int PR2Duty;
      extern volatile unsigned int PR3Duty;

      //The input pin being acquired and converted is AN3.
      void ADC_Init(void)
      {
      //ADbuff_ptr = (long volatile *) &ADbuff;; //initialise ADC int buff ptr to start of buffer.

      //ADCON1 Register
      //Set up A/D for Automatic Sampling
      //Use internal counter (SAMC) to provide sampling time
      //number format.
      //Set up Sequential sampling for multiple S/H amplifiers
      //All other bits to their default state
      ADCON1bits.FORM = 0; //Set up A/D conversion results to be read in integer
      ADCON1bits.SSRC = 7;
      ADCON1bits.ASAM = 1; //Automatic sampling
      ADCON1bits.SIMSAM = 0;


      //ADCON2 Register
      //Set up A/D for interrupting after 8 samples get filled in the buffer 0 - 7
      //then int when 8 samples filled to buffer 8 - F (15)
      //Set up to sample on 2 S/H amplifiers - CH0 and CH1
      //All other bits to their default state
      ADCON2bits.BUFM = 1; //select two banks of 8 ADC result registers for alternate filling
      ADCON2bits.SMPI = 7; //generate an interrupt on every 8 buffer vals filled
      ADCON2bits.CHPS = 1;
      ADCON2bits.VCFG = 0; //Internal ref Ideally use external references ...3

      //ADCON3 Register
      //We would like to set up a sampling rate of 1 MSPS
      //Total Conversion Time (tad ) = 154 ns
      //At 29.4 MIPS, Tcy = 33.9 ns = Instruction Cycle Time
      //The A/D converter will take 12*Tad periods to convert each sample
      //So for ~1 MSPS we need to have Tad close to 83.3ns
      //Using equation in the Family Reference Manual we have
      //ADCS = 2*Tad/Tcy - 1
      //ADCS = 2*154/33.9 - 1 = 8
      ADCON3bits.SAMC = 0; // approx 1MHz sample rate
      //ADCON3bits.SAMC = 10; // approx 100khz sample rate
      ADCON3bits.ADCS = 9; //84 ns sample tad

      //ADCHS Register
      //Set up A/D Channel Select Register to convert AN3 on Mux A input
      //of CH0 and CH1 S/H amplifiers
      ADCHS = 0x0023;

      //ADCSSL Register
      //Channel Scanning is disabled. All bits left to their default state
      ADCSSL = 0x0000;

      //ADPCFG Register
      //Set up channels AN3 as analog input and configure rest as digital
      //Recall that we configured all A/D pins as digital when code execution
      //entered main() out of reset
      ADPCFG = 0xFFFF;
      ADPCFGbits.PCFG3 = 0;

      //Clear the A/D interrupt flag bit
      IFS0bits.ADIF = 0;

      //Disable A/D interrupt
      IEC0bits.ADIE = 0;

      //Turn on the A/D converter
      //This is typically done after configuring other registers
      ADCON1bits.ADON = 1;

      }

      void __attribute__((__interrupt__, auto_psv)) _ADCInterrupt(void)
      {
      //unsigned int buffptr;
      //Clear the A/D Interrupt flag bit or else the CPU will
      //keep vectoring back to the ISR
      IFS0bits.ADIF = 0;
      }

      Comment


      • #4
        eeprom_rw.s

        ; general config for dsPIC30xxx in MPLAB

        .include "p30fxxxx.inc"

        ; compile for absolute C address
        ; if not needed, comment this line

        .equ absolute_C_address, 1

        .global _WriteWord
        .global _ReadWord

        ;------ eeprom address
        ; NEW
        ; conditionals for developing (30F4012), (30F6013) and (30F5014A)

        .ifdef __30F4012
        .equiv EEPROM_SIZE, 0x3ff
        .equiv ADDRESS_HI, 0x007F
        .equiv ADDRESS_LO, 0xfC00
        .endif

        .ifdef __30F5013
        .equiv EEPROM_SIZE, 0x3ff
        .equiv ADDRESS_HI, 0x007F
        .equiv ADDRESS_LO, 0xfC00
        .endif

        .ifdef __30F6014A
        .equiv EEPROM_SIZE, 0xfff
        .equiv ADDRESS_HI, 0x007F
        .equiv ADDRESS_LO, 0xf000
        .endif

        ;------ Memory opType.

        .equiv ERASE_WORD, 0x4044
        .equiv WRITE_WORD, 0x4004

        ;------ Write a word to eeprom

        _WriteWord:
        push w4
        mov #ADDRESS_HI,w4
        mov w4,TBLPAG
        mov w4,NVMADRU
        mov #ADDRESS_LO,w4

        .ifdef absolute_C_address
        sub w0,w4,w0
        .endif

        sl w0,#1,w0
        add w0,w4,w0
        mov w0,NVMADR
        rcall EraseWord
        mov #WRITE_WORD,w4
        mov w4,NVMCON
        TBLWTL w1,[w0]
        rcall KeySequence
        pop w4
        return

        ;------ Read a word from eeprom

        _ReadWord:
        push w4
        mov #ADDRESS_HI,w4
        mov w4,TBLPAG
        mov w4,NVMADRU
        mov #ADDRESS_LO,w4
        mov w4,NVMADR

        .ifdef absolute_C_address
        sub w0,w4,w0
        .endif

        sl w0,#1,w0
        add w0,w4,w4
        tblrdl [w4],w0
        pop w4
        return

        ;------ Erase a word from eeprom

        EraseWord:
        mov #ERASE_WORD,w4
        mov w4,NVMCON

        ;------ Required key sequence for write or erase.

        KeySequence:
        disi #16
        mov #0x55,w4
        mov w4,NVMKEY
        mov #0xaa,w4
        mov w4,NVMKEY
        bset NVMCON,#WR
        nop
        nop
        K1wait: btsc NVMCON,#WR
        bra K1wait
        return

        .end

        ;------ End of file.

        Comment


        • #5
          lcd.c

          /*
          lcd.c - LCD routines.
          Copyright (C) 2011 Paul Moody

          This program is free software: you can redistribute it and/or modify
          it under the terms of the GNU General Public License as published by
          the Free Software Foundation, either version 3 of the License, or
          (at your option) any later version.

          This program is distributed in the hope that it will be useful,
          but WITHOUT ANY WARRANTY; without even the implied warranty of
          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
          GNU General Public License for more details.

          You should have received a copy of the GNU General Public License
          along with this program. If not, see <http://www.gnu.org/licenses/>.
          */
          /*
          * This code will interface to a standard LCD controller
          * like the Hitachi HD44780. 4 bit mode.
          *
          * Set up the port I/O on PIC,
          * call lcd_init(),other routines as required.
          *
          */
          #include <stdio.h>
          #include "system.h"

          extern void setup_TMR1(void);
          extern void delay_tmr1(unsigned int);

          char lcdBuff30[30];

          // I/O for LCD
          #define LCD_RS _RE1 /* register select */
          #define LCD_EN _RE5 /* enable */
          #define LCD_D0 _RB0
          #define LCD_D1 _RB1
          #define LCD_D2 _RB2
          #define LCD_D3 _RE3

          /* strobe the enable pin */
          void lcd_strobe(void)
          {
          delay_tmr1(10);
          LCD_EN = 1;
          delay_tmr1(10);
          LCD_EN = 0;
          }

          /* write a byte to the LCD in 4 bit mode */
          void lcd_write(unsigned char c)
          {
          int va, vb;
          //hi order nibble
          va = PORTB & 0xfff8;
          vb = (int) (c>>4) & 0x0007;
          PORTB = va | vb;
          va = PORTE & 0xfff7;
          vb = (int) (c>>4) & 0x0008;
          PORTE = va | vb;
          lcd_strobe();

          //lo order nibble out
          va = PORTB & 0xfff8;
          vb = (int) c & 0x0007;
          PORTB = va | vb;
          va = PORTE & 0xfff7;
          vb = (int) c & 0x0008;
          PORTE = va | vb;
          lcd_strobe();

          //short delay
          //delay_tmr1(10);
          delay_tmr1(1);
          }

          /*
          * Clear and home the LCD
          */
          void lcd_clear(void)
          {
          LCD_RS = 0;
          lcd_write(0x1);
          delay_tmr1(1);
          }

          /* write a single char to the LCD */
          void lcd_putc(const char c)
          {
          LCD_RS = 1; // write chars
          lcd_write(c);
          }

          /* write a string of chars to the LCD */
          void lcd_puts(const char * s)
          {
          LCD_RS = 1; // write chars
          while(*s)
          lcd_write(*s++);
          }

          /*
          * Go to specified cursor position
          */
          void lcd_goto(unsigned char pos)
          {
          LCD_RS = 0;
          //delay_tmr1(10);
          delay_tmr1(1);
          lcd_write(0x80+pos);
          }

          /* initialise the LCD - put into 4 bit mode */
          void setup_lcd(void)
          {

          LCD_EN = 0; // enable lo ... bytes clocked in by lcd_strobe
          LCD_RS = 0; // write control byte mode

          //poweron delay
          delay_tmr1(200);
          lcd_write(0x02);
          delay_tmr1(200);
          lcd_write(0x80);
          lcd_write(0x2;
          lcd_write(0x2; // 4 bit mode, 2 line mode, 5x7 font
          lcd_write(0x0; // display off
          lcd_write(0x0c); // display on, ul off, blink off
          lcd_write(0x06); // entry mode = incr, no shift
          lcd_write(0x02); // display and home cursor
          // delay 5ms
          delay_tmr1(5);

          }

          Comment


          • #6
            main.c

            /*
            main.c - this executes first :-).
            Copyright (C) 2011 Paul Moody

            This program is free software: you can redistribute it and/or modify
            it under the terms of the GNU General Public License as published by
            the Free Software Foundation, either version 3 of the License, or
            (at your option) any later version.

            This program is distributed in the hope that it will be useful,
            but WITHOUT ANY WARRANTY; without even the implied warranty of
            MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
            GNU General Public License for more details.

            You should have received a copy of the GNU General Public License
            along with this program. If not, see <http://www.gnu.org/licenses/>.
            */
            #include "system.h"
            #include <libpic30.h>
            #include <p30f4012.h>
            #include <stdio.h>

            extern void main_loop(void);

            _FOSC(CSW_FSCM_OFF & FRC_PLL16 ); // 7.3mhz * 16 / 4 = 29 mips on internal rc osc
            _FWDT(WDT_OFF); // wdt off

            /* enablebrownout @4.2v, 64ms powerup delay, MCLR pin active */
            //_FBORPOR(PBOR_ON & BORV_42 & PWRT_64 & MCLR_EN & RST_PWMPIN & PWMxH_ACT_HI & PWMxL_ACT_HI );

            /* enablebrownout @4.2v, 64ms powerup delay, MCLR pin NOT active */
            _FBORPOR(PBOR_ON & BORV_42 & PWRT_64 & MCLR_DIS & PWMxL_ACT_HI);

            #ifdef __DEBUG // secret squirrel code protect ... too bad this is open source ;-)
            _FGS( CODE_PROT_OFF & GWRP_OFF );
            #else
            _FGS( CODE_PROT_ON & GWRP_ON);
            #endif

            //----------------------------------------------------------------------
            extern void read_vars(void);
            extern void setup_TMR1(void);
            extern void setup_TMR2(void);
            extern void setup_TMR3(void);
            extern void QEI_Setup(void);

            extern unsigned int MenuState;
            extern unsigned int MenuItemState;
            extern unsigned int OptionState;
            extern unsigned int OptionSelect;

            extern void setup_uart(void);
            extern void WriteUART_to_RS232(void);
            extern void buff2uart(unsigned char *);

            extern void ADCResultToDecimal(unsigned int);

            extern volatile unsigned short int timer_test;

            extern void setup_pwm(void);

            extern void ADC_Init(void);

            char buff30[30];

            extern void setup_lcd(void);

            void __attribute__((__interrupt__ , auto_psv)) _StackError (void)
            {
            while (1)
            {
            AUDIO = 1;
            AUDIO = 0;
            AUDIO = 0;
            AUDIO = 0;
            }
            }

            void __attribute__((__interrupt__ , auto_psv)) _AddressError (void)
            {
            while (1)
            {
            AUDIO = 1;
            AUDIO = 1;
            AUDIO = 0;
            AUDIO = 0;
            }
            }

            void __attribute__((__interrupt__ , auto_psv)) _MathError (void)
            {
            while (1)
            {
            AUDIO = 1;
            AUDIO = 0;
            AUDIO = 1;
            AUDIO = 0;
            }
            }

            /************************************************** *******************
            Function: void setup_io(void)
            Summary: Set up basic io pins and modes on chip
            ************************************************** ******************/
            void setup_io(void)
            {
            // PORT B
            ADPCFG = 0xffff; // make sure analog doesnt grab encoder pins (all digital)
            ADPCFGbits.PCFG0 = 0; // AN0 output
            ADPCFGbits.PCFG1 = 0; // AN1 output
            ADPCFGbits.PCFG2 = 0; // AN2 output
            // 0=output, 1=input
            _TRISB0 = 0; // Pin 2 LCD D0
            _TRISB1 = 0; // Pin 3 LCD D1
            _TRISB2 = 0; // Pin 4 LCD D2
            _TRISB3 = 1; // Pin 5 Analogue input
            _TRISB4 = 1; // used by quad encoder input ch A
            _TRISB5 = 1; // used by quad encoder input ch B

            // PORT C // 0=output, 1=input
            _TRISC13 = 1; // SELECT Button
            _TRISC14 = 1; // ZERO Button
            _TRISC15 = 1; // SATLOCK Button

            // PORT D // 0=output, 1=input
            _TRISD0 = 0; // SAMPLE 1
            _TRISD1 = 0; // SAMPLE 2

            // PORT E // 0=output, 1=input
            _TRISE0 = 0; // PWM1L OUT
            _TRISE1 = 0; // LCD RS
            _TRISE2 = 0; // PWM2L OUT
            _TRISE3 = 0; // LCD D7
            _TRISE4 = 0; // PWM3L OUT
            _TRISE5 = 0; // LCD EN
            _TRISE8 = 0; // AUDIO OUT

            // PORT F // 0=output, 1=input
            _TRISF2 = 1; // PGC used by icsp/UART RX
            _TRISF3 = 0; // PGD used by icsp/UART TX
            }


            /************************************************** *******************
            Function: int main(void)
            Summary: execute this first :-) calls everything else
            ************************************************** ******************/
            int main(void)
            {
            MenuState = A; // startup LCD menu
            MenuItemState = RUN;
            OptionState = OptNORM;
            OptionSelect = OptNORM;

            setup_pwm(); // start PWM output -- cannot set PWM vars till setup done ???!!
            read_vars(); // get all the vars from EEPROM
            setup_io(); // make all i/o pins go the right dir
            setup_uart(); // setup the serial interface to the PC
            setup_lcd(); // setup LCD display

            setup_TMR2(); // set up timer 2
            setup_TMR3(); // set up timer 3
            IEC0bits.T1IE = 0; // disable interrupts for timer 1
            IEC0bits.T2IE = 0; // disable interrupts for timer 2
            IEC0bits.T3IE = 0; // disable interrupts for timer 3

            QEI_Setup(); // start the rotary encoder
            ADC_Init(); // start the ADC up
            main_loop(); // main loop
            return 0; // should not arrive here ... AAAAARGH!
            }

            Comment


            • #7
              main_loop.c

              /*
              main_loop.c - this executes all the time :-).
              Copyright (C) 2011 Paul Moody

              This program is free software: you can redistribute it and/or modify
              it under the terms of the GNU General Public License as published by
              the Free Software Foundation, either version 3 of the License, or
              (at your option) any later version.

              This program is distributed in the hope that it will be useful,
              but WITHOUT ANY WARRANTY; without even the implied warranty of
              MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
              GNU General Public License for more details.

              You should have received a copy of the GNU General Public License
              along with this program. If not, see <http://www.gnu.org/licenses/>.
              */
              #include <stdio.h>
              #include <stdlib.h>
              #include <string.h>
              #include <math.h> // for PI etc
              #include "system.h"
              ////////////////////////////
              #define TIMER TRUE
              ////////////////////////////
              unsigned int Butt1Event;
              unsigned int Butt2Event;
              unsigned int Butt3Event;

              extern short int rxrdy; // flag to indicate a line of data is available in buffer

              extern struct VALSTORE valblock;

              double Fclock = 7370.000; //master clock frequency in KHz (internal RC)

              long ADCval;
              long ADCvalSamp;
              unsigned int ADCvalCount;
              unsigned int ADCvalCountMax;
              long ADCvalSAT;
              long ADCvalSATsamp;
              volatile int SATdiff;
              unsigned int ADCvalSATcount;
              unsigned int ADCvalSATcountMax;

              extern volatile unsigned int AUDIOrate; //dds accumulator threshold sum for audio events.

              extern volatile unsigned char QEI_Dir;
              extern volatile int QEI_Event;

              extern unsigned int MenuState;
              extern unsigned int MenuItemState;
              extern unsigned int OptionSelect;
              extern void process_QEI(void);


              extern void process_serial_buffer(void);
              extern void process_QEI(void);

              extern char lcdBuff30[30];
              extern void lcd_clear(void);
              extern void lcd_putc(const char);
              extern void lcd_puts(const char *);
              extern void lcd_goto(unsigned char);
              extern void lcd_test(void);
              extern void setup_lcd(void);

              extern void delay_tmr1(unsigned int);

              void SATdiffLCD(void);
              void SATlevelLCD(void);


              //================================================== ===========================
              // local global vars used by this program
              //================================================== ===========================

              void main_loop(void)
              {
              //////////////////////////////////
              #ifdef TIMER
              int timeout = 20;
              #endif
              //////////////////////////////////

              int LCDcycle = 0;

              lcd_goto(0);
              lcd_puts(VERSION);
              lcd_goto(0x40);
              lcd_puts("Press ZERO to GO\0");
              lcd_goto(0);

              while (ZEROBUTT == 1); //wait for button press
              lcd_clear();

              while (1)
              {
              ADCvalCount = 0; //reset the running sum count
              while (ADCvalCount < 16384) //oversampling 16384=7bit 4096x=6bit 1024X=5bit 256X=4bit 64X=3bit 16X=2bit 4X=1bit 1X=0bit
              {
              if (ADCON1bits.DONE == 1)
              {
              if (ADCON2bits.BUFS) //bank convert
              {
              ADCval += (long)ADCBUF0;
              ADCval += (long)ADCBUF1;
              ADCval += (long)ADCBUF2;
              ADCval += (long)ADCBUF3;
              ADCval += (long)ADCBUF4;
              ADCval += (long)ADCBUF5;
              ADCval += (long)ADCBUF6;
              ADCval += (long)ADCBUF7;
              }
              else
              {
              ADCval += (long)ADCBUF8;
              ADCval += (long)ADCBUF9;
              ADCval += (long)ADCBUFA;
              ADCval += (long)ADCBUFB;
              ADCval += (long)ADCBUFC;
              ADCval += (long)ADCBUFD;
              ADCval += (long)ADCBUFE;
              ADCval += (long)ADCBUFF;
              }
              ADCvalCount += 8;
              } //END if (ADCON2bits.BUFS)
              } // end while

              //////// check for serial or QEI /////
              if (rxrdy)
              process_serial_buffer();
              if (QEI_Event)
              process_QEI();
              //////////////////////////////////////

              if (SELECTBUTT == 0) Butt1Event++;
              if (ZEROBUTT == 0) Butt2Event++;

              if((Butt1Event > DEBOUNCE) & (SELECTBUTT == 1)) //button has been pressed AND released
              {
              if (MenuItemState != RUN)
              {
              if (MenuItemState != OPT)
              MenuItemState = OPT; //go from current state to OPTion state
              else
              MenuItemState = OptionSelect; //go from OPTion to selected option ( NORM / EDIT / SAVE etc )

              if(MenuItemState == RUN) //special update for LCD if RUN selected because SAT is slow to update below.
              SATlevelLCD();
              }
              else
              MenuItemState = NORM;
              Butt1Event = 0; //reset the butt event
              process_QEI(); //update LCD with menu state
              }

              if (MenuItemState == RUN)
              {
              LCDcycle++; //do the LCD RUN vals every X ADC samples and if we are in RUN state
              if (LCDcycle > 15)
              {
              SATdiffLCD();
              LCDcycle = 0;
              }
              }

              ADCvalSamp = ADCval>>8; //store the running sum for ADC samples

              if(ZEROBUTT == 0) //if ZEROBUTT button pressed then set the SAT to the current val
              ADCvalSATsamp = ADCvalSamp;
              PDC3 = SATdiff + PTPER; //update the PWM target val ( PTPER sets mid scale )
              ADCvalSAT += ADCvalSamp; //update the SAT sum
              ADCvalSATcount++;
              if (ADCvalSATcount > 1023)
              {
              ADCvalSATsamp = ADCvalSamp;
              /////////////////////////////////////////
              #ifdef TIMER
              if(TIMER) //test timeout true or false
              timeout--;
              if ((timeout == 0) & (MenuItemState != RUN))
              MenuItemState = RUN;
              else
              timeout = 20;
              #endif
              /////////////////////////////////////////
              //if(SATLOCKBUTT == 1) //if SATLOCKBUTT button NOT pressed update the SAT value
              //{
              // ADCvalSATsamp = ADCvalSAT>>11; //right shift SAT sum to match with ADCval sum
              // SATdiffAVG = SATdiffAVG>>11; //right shift SAT diffAVG
              // SATdiffAVG = SATdiffAVG>>1;
              // ADCvalSAT = ADCvalSAT>>1;
              //}

              ////update the SAT LCD value
              if (MenuItemState == RUN)
              SATlevelLCD();

              ADCvalSATcount=0; //reset the count
              }

              SATdiff = ADCvalSATsamp - ADCvalSamp; //Do the SAT diff update
              ADCval = ADCval>>1; //reinitialise the running sum to half the previous
              }//END while(1)
              }


              void SATdiffLCD(void)
              {
              lcd_goto(0);
              sprintf(lcdBuff30,"SIG:%+.6lf ", SATdiff*(5.0/0x1ffff)); //nb : trailing spaces clear display :-)
              lcd_puts(lcdBuff30);
              }

              void SATlevelLCD(void)
              {
              lcd_goto(0x40);
              sprintf(lcdBuff30,"SAT: %.6lf ", ADCvalSATsamp*(5.0/0x1ffff)); //nb : trailing spaces clear display :-)
              lcd_puts(lcdBuff30);
              }

              Comment


              • #8
                pwm.c

                /*
                pwm.c - pulse generator for TX etc :-).
                Copyright (C) 2011 Paul Moody

                This program is free software: you can redistribute it and/or modify
                it under the terms of the GNU General Public License as published by
                the Free Software Foundation, either version 3 of the License, or
                (at your option) any later version.

                This program is distributed in the hope that it will be useful,
                but WITHOUT ANY WARRANTY; without even the implied warranty of
                MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
                GNU General Public License for more details.

                You should have received a copy of the GNU General Public License
                along with this program. If not, see <http://www.gnu.org/licenses/>.
                */

                //----------------------------------------------------------------------
                #include "system.h"
                #include <pwm.h>

                volatile unsigned int PWMFREQval;
                volatile unsigned int PWM1val;
                volatile unsigned int PWM2val;
                volatile unsigned int PWM3val;


                extern struct VALSTORE valblock;

                extern volatile long SATdiff;

                volatile unsigned long AUDIOsum; //dds sum accumulator for audio generator
                volatile unsigned long AUDIOrate; //dds accumulator threshold sum for audio events.


                /************************************************** *******************
                Function: void __attribute__((__interrupt__)) _PWMInterrupt(void)
                ************************************************** ******************/
                void __attribute__((__interrupt__, auto_psv )) _PWMInterrupt(void)
                {
                IFS2bits.PWMIF = 0;

                TMR2 = 0;

                AUDIOsum = AUDIOsum + SATdiff + AUDIOrate;
                AUDIOsum = AUDIOsum & 0xffff;
                if ((AUDIOsum & 0x1000) == 0x1000)
                AUDIO = 1;
                else
                AUDIO = 0;
                return;
                }


                void __attribute__((__interrupt__ , auto_psv )) _FLTAInterrupt(void)
                {
                IFS2bits.FLTAIF = 0;
                }

                /************************************************** *******************
                Function: void setupPWM(void)
                Summary: Set up basic PWM with complimentary o/p
                ************************************************** ******************/
                void setup_pwm(void)
                {
                /* PWM interrupt configuration value*/
                unsigned int config;

                PTCONbits.PTEN = 0; // PWM off
                IEC2bits.PWMIE = 0 ; // disable the PWM interrupt

                IPC9bits.PWMIP = 7; //highest priority interrupt

                //PWMCON2bits.UDIS = 1;
                /* Configure pwm interrupt enable/disable and set interrupt priorties */
                config = (PWM_INT_DIS & PWM_FLTA_DIS_INT & PWM_INT_PR1 & PWM_FLTA_INT_PR0);

                /* clear the Interrupt flags */
                IFS2bits.PWMIF = 0;
                IFS2bits.FLTAIF = 0;

                /* Set priority for the period match */
                IPC9bits.PWMIP = (0x0007 & config);

                /* Set priority for the Fault A */
                IPC10bits.FLTAIP = (0x0070 & config)>> 4;

                /* enable /disable of interrupt Period match */
                IEC2bits.PWMIE = (0x0008 & config) >> 3;

                /* enable /disable of interrupt Fault A.*/
                IEC2bits.FLTAIE = (0x0080 & config) >> 7;

                SEVTCMP = 0x00;

                /* 3 output are independant and enabled */
                /// PWMCON1 = (PWM_MOD1_IND & PWM_MOD2_IND & PWM_MOD3_IND & /* independant i/o */
                /// PWM_PEN1L & PWM_PEN1H &
                /// PWM_PEN2L & PWM_PEN2H &
                /// PWM_PEN3L & PWM_PEN3H
                /// );
                PWMCON1 = (PWM_MOD1_IND & PWM_MOD2_IND & PWM_MOD3_IND & /* independant i/o */
                PWM_PEN1L & PWM_PDIS1H &
                PWM_PEN2L & PWM_PDIS2H &
                PWM_PEN3L & PWM_PDIS3H
                );
                //The Complementary mode is selected for each PWM I/O pin pair by clearing the appropriate
                //PMODx bit in PWMCON1. The PWM I/O pins are set to complementary mode by default upon a
                //device reset.

                //PWMCON1bits.PMOD1 = 0; // complementary outputs off
                //PWMCON1bits.PMOD2 = 0; // complementary outputs off
                //PWMCON1bits.PMOD3 = 0; // complementary outputs off

                //PWMCON1bits.PEN1H = 0; //enable main PWM1
                //PWMCON1bits.PEN2H = 0; //enable main PWM2
                //PWMCON1bits.PEN3H = 0; //enable main PWM3

                //use lo outputs as digital i/o
                //PWMCON1bits.PEN1L = 0; //disable alt PWM1
                //PWMCON1bits.PEN2L = 0; //disable alt PWM2
                //PWMCON1bits.PEN3L = 0; //disable alt PWM3

                PWMCON2 = 0x0004; // SEVOPS<3:0> = 0 (PWM Special Event Trigger Output Postscale Select bits = 1:1 (Not Used))
                // IUE = 1 (Updates to the active PDC registers are immediate)
                // OSYNC = 0 (Output overrides via the OVDCON register occur on next TCY boundary)
                // UDIS = 0 (Updates from duty cycle and period buffer registers are enabled)

                SEVTCMP = 50; // special event timer
                SEVTCMPbits.SEVTDIR = 1; // special event count direction 0 = trig on up count 1 = trig on down count

                DTCON1 = 0x0000; /* Deadtime set to Tcy = 0 ns 6 bits 0 to 63 */
                DTCON1bits.DTAPS = 0; /* 0:Tcy 1:2Tcy 2:4Tcy 3:8Tcy 2 bits prescaler for deadtime. */

                /* set dead time options, scale = 1, 10*FCY (about 625ns) */
                //DTCON1 = PWM_DTAPS1 & PWM_DTA10;

                /* set up the fault mode override bits and mode */
                FLTACON = PWM_FLTA_MODE_CYCLE &
                PWM_FLTA1_DIS &
                PWM_FLTA2_DIS &
                PWM_FLTA3_DIS &
                //PWM_OVA1L_INACTIVE &
                PWM_OVA1H_INACTIVE &
                //PWM_OVA2L_INACTIVE &
                PWM_OVA2H_INACTIVE &
                //PWM_OVA3L_INACTIVE &
                PWM_OVA3H_INACTIVE ;

                /* set special event post scaler, output override sync select and pwm update enable */
                PWMCON2 = (PWM_SEVOPS1 & PWM_OSYNC_PWM & PWM_UEN);
                //PTCON = (PWM_EN & PWM_IDLE_CON & PWM_OP_SCALE1 & PWM_IPCLK_SCALE1 & PWM_MOD_UPDN);
                PTCON = (PWM_EN & PWM_IDLE_CON & PWM_OP_SCALE1 & PWM_IPCLK_SCALE1 & PWM_MOD_FREE);


                /////////////////pulse generation

                OC1CONbits.OCTSEL = 0; //select timer 2 for output compare 1
                OC2CONbits.OCTSEL = 0; //select timer 2 for output compare 2

                OC1CONbits.OCM = 5; //100 single 101 continuous
                OC2CONbits.OCM = 5; //100 single 101 continuous

                /* Configure PWM generators*/
                PTPER = valblock.FREQ;
                PDC1 = valblock.PWM1;

                IEC2bits.PWMIE = 1 ; // enable the PWM interrupt
                PTCONbits.PTEN = 1; // turn on the PWM

                /* set the pulse parms. Ouput Compare */
                OC1R = valblock.SP1ON;
                OC1RS = valblock.SP1OFF;

                OC2R = valblock.SP2ON;
                OC2RS = valblock.SP2OFF;

                }

                Comment


                • #9
                  QEImenu.c

                  /*
                  QEImenu.c - handles the rotary encoder and menu.
                  Copyright (C) 2011 Paul Moody

                  This program is free software: you can redistribute it and/or modify
                  it under the terms of the GNU General Public License as published by
                  the Free Software Foundation, either version 3 of the License, or
                  (at your option) any later version.

                  This program is distributed in the hope that it will be useful,
                  but WITHOUT ANY WARRANTY; without even the implied warranty of
                  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
                  GNU General Public License for more details.

                  You should have received a copy of the GNU General Public License
                  along with this program. If not, see <http://www.gnu.org/licenses/>.
                  */

                  #include <p30f4012.h>
                  #include <stdio.h>
                  #include <qei.h>
                  #include "system.h"

                  unsigned int MenuState;
                  unsigned int MenuItemState;
                  unsigned int OptionState;
                  unsigned int OptionSelect;


                  extern double Fclock; //input clock frequency in KHz
                  extern struct VALSTORE valblock;

                  volatile int QEI_Dir;
                  volatile int QEI_Event;

                  extern void save_vars(void);
                  extern void read_vars(void);
                  extern int calc_cksum(int, int *);
                  extern int calc_EE_cksum(int, int *);
                  extern int cksum_OK(int, int *);

                  extern char lcdBuff30[30];
                  extern void lcd_clear(void);
                  extern void lcd_putc(const char);
                  extern void lcd_puts(const char *);
                  extern void lcd_goto(unsigned char);
                  extern void lcd_test(void);
                  extern void setup_lcd(void);

                  extern volatile unsigned int AUDIOrate;

                  /************************************************** *******************
                  * Function Name : QEIInterrupt()
                  * Description : handles rotary encoder interrupts
                  ************************************************** *******************/

                  void __attribute__((__interrupt__, auto_psv)) _QEIInterrupt(void)
                  {

                  IFS2bits.QEIIF = 0; // clear interrupt
                  if(QEI_Event == 0) // only if there are no pending QEI events
                  {
                  QEI_Dir = QEICONbits.UPDN; // store up or down state
                  QEI_Event = 1; // flag QEI event
                  }
                  }


                  /************************************************** *******************
                  * Function Name : QEI_Setup()
                  * Description : initialises rotary encoder
                  ************************************************** *******************/

                  void QEI_Setup(void)
                  {
                  QEICONbits.QEIM = 0; // Disable QEI Module
                  QEICONbits.CNTERR = 0; // Clear any count errors
                  QEICONbits.QEISIDL = 0; // Continue operation during sleep
                  QEICONbits.SWPAB = 0; // QEA and QEB not swapped
                  QEICONbits.PCDOUT = 0; // Normal I/O pin operation
                  QEICONbits.POSRES = 0; // pos counter reset by index disable
                  DFLTCONbits.CEID = 1; // Count error interrupts disabled
                  DFLTCONbits.QEOUT = 1; // Digital filters output enabled for QEn pins
                  DFLTCONbits.QECK = 7; // 1:256 clock divide for digital filter for QEn
                  POSCNT = 0; // Reset position counter
                  QEICONbits.QEIM = 5; // X4 mode with position counter reset by count
                  MAXCNT = 1;
                  IFS2bits.QEIIF = 0; // clear Interrupt flag
                  IEC2bits.QEIIE = 1; // Enable QEI Interupts
                  return;
                  }


                  /************************************************** *******************
                  * Function Name : process_QEI()
                  * Description : handles the rotary encoder and updates the LCD
                  ************************************************** *******************/
                  void process_QEI(void)
                  {
                  if (MenuItemState == OPT)
                  {
                  switch ( OptionState )
                  {
                  case OptX1:
                  if(QEI_Dir == 0)
                  OptionState = OptNORM;
                  else
                  OptionState = OptX10;
                  break;
                  case OptX10:
                  if(QEI_Dir == 0)
                  OptionState = OptX1;
                  else
                  OptionState = OptX100;
                  break;
                  case OptX100:
                  if(QEI_Dir == 0)
                  OptionState = OptX10;
                  else
                  OptionState = OptSAVE;
                  break;
                  case OptSAVE:
                  if(QEI_Dir == 0)
                  OptionState = OptX100;
                  else
                  OptionState = OptNORM;
                  break;
                  case OptNORM:
                  if(QEI_Dir == 0)
                  OptionState = OptSAVE;
                  else
                  OptionState = OptX1;
                  break;
                  default:
                  lcd_clear();
                  lcd_goto(0);
                  lcd_puts("Option State Err\0");
                  while(1); //stop here
                  }//END switch
                  }//END if (MenuItemState == OPT)

                  if (MenuItemState == OPT)
                  {
                  switch ( OptionState )
                  {
                  case OptX1:
                  OptionSelect = EDIT;
                  lcd_clear();
                  lcd_goto(0);
                  lcd_puts("MODIFY VALUE\0");
                  lcd_goto(40);
                  lcd_puts("STEP = X1\0");
                  break;
                  case OptX10:
                  OptionSelect = EDIT;
                  lcd_clear();
                  lcd_goto(0);
                  lcd_puts("MODIFY VALUE\0");
                  lcd_goto(40);
                  lcd_puts("STEP = X10\0");
                  break;
                  case OptX100:
                  OptionSelect = EDIT;
                  lcd_clear();
                  lcd_goto(0);
                  lcd_puts("MODIFY VALUE\0");
                  lcd_goto(40);
                  lcd_puts("STEP = X100\0");
                  break;
                  case OptSAVE:
                  OptionSelect = SAVE;
                  lcd_clear();
                  lcd_goto(0);
                  lcd_puts("SAVE TO EEPROM\0");
                  break;
                  case OptNORM:
                  OptionSelect = RUN;
                  lcd_clear();
                  lcd_goto(0);
                  lcd_puts("EXIT\0");
                  break;
                  default:
                  lcd_clear();
                  lcd_goto(0);
                  lcd_puts("Option State Err\0");
                  while(1); //stop here
                  }//END switch
                  }//END if (MenuItemState == OPT)

                  /// set menu state to next state if not changing value///
                  if (MenuItemState == NORM)
                  {
                  switch ( MenuState )
                  {
                  case A:
                  if(QEI_Dir == 0)
                  MenuState = M;
                  else
                  MenuState = B;
                  break;
                  case B:
                  if(QEI_Dir == 0)
                  MenuState = A;
                  else
                  MenuState = C;
                  break;
                  case C:
                  if(QEI_Dir == 0)
                  MenuState = B;
                  else
                  MenuState = E;
                  break;
                  case E:
                  if(QEI_Dir == 0)
                  MenuState = C;
                  else
                  MenuState = F;
                  break;
                  case F:
                  if(QEI_Dir == 0)
                  MenuState = E;
                  else
                  MenuState = G;
                  break;
                  case G:
                  if(QEI_Dir == 0)
                  MenuState = F;
                  else
                  MenuState = H;
                  break;
                  case H:
                  if(QEI_Dir == 0)
                  MenuState = G;
                  else
                  MenuState = M;
                  break;
                  case M:
                  if(QEI_Dir == 0)
                  MenuState = H;
                  else
                  MenuState = A;
                  break;
                  default:
                  lcd_clear();
                  lcd_goto(0);
                  lcd_puts("Menu State Err\0");
                  while(1); //stop here
                  }

                  }//END if (MenuItemState == NORM)

                  ///display menu for selected state ///
                  if (MenuItemState != OPT)
                  {
                  switch ( MenuState )
                  {
                  case A:
                  if(MenuItemState == EDIT)
                  {
                  if(QEI_Dir) //up
                  {
                  if(PTPER < (14740 - OptionState)) //OptionState contains the "multiplier" x1 x10 x100 etc
                  PTPER = PTPER + OptionState;
                  }
                  else
                  {
                  if(PTPER > (1474 + OptionState))
                  PTPER = PTPER - OptionState;
                  }
                  PDC2 = PTPER>>5; //LCD contrast option
                  }
                  if(MenuItemState == SAVE) //save to EEPROM
                  {
                  valblock.FREQ = PTPER; //store freq in ram block
                  save_vars(); //write ram block to EEPROM
                  MenuItemState = NORM; //leave SAVE state
                  }
                  lcd_clear();
                  lcd_goto(0);
                  sprintf(lcdBuff30,"TxF:%8.3lf Khz", (Fclock * 4)/PTPER);
                  lcd_puts(lcdBuff30);
                  lcd_goto(0x40);
                  sprintf(lcdBuff30,"Per:%8.3lf uS", (PTPER/(Fclock * 4))*1000);
                  lcd_puts(lcdBuff30);
                  break;
                  case B:
                  if(MenuItemState == EDIT)
                  {
                  if(QEI_Dir) //up
                  PDC1 = PDC1 + OptionState;
                  else
                  PDC1 = PDC1 - OptionState;
                  }
                  if(MenuItemState == SAVE) //save to EEPROM
                  {
                  valblock.PWM1 = PDC1; //store PWM1 in ram block
                  save_vars(); //write ram block to EEPROM
                  MenuItemState = NORM; //leave SAVE state
                  }
                  lcd_clear();
                  lcd_goto(0);
                  lcd_puts("TX1 PULSE PERIOD\0");
                  lcd_goto(0x40);
                  sprintf(lcdBuff30,"%.3lf uS", (PDC1/(Fclock * )*1000);
                  lcd_puts(lcdBuff30);
                  break;
                  case C:
                  //if(MenuItemState == EDIT)
                  //{
                  // if(QEI_Dir) //up
                  // PDC2 = PDC2 + OptionState;
                  // else
                  // PDC2 = PDC2 - OptionState;
                  //}
                  //if(MenuItemState == SAVE) //save to EEPROM
                  //{
                  // valblock.PWM2 = PDC2; //store PWM1 in ram block
                  // save_vars(); //write ram block to EEPROM
                  // MenuItemState = NORM; //leave SAVE state
                  //}
                  lcd_clear();
                  lcd_goto(0);
                  lcd_puts("TX2 PULSE PERIOD\0");
                  lcd_goto(0x40);
                  sprintf(lcdBuff30,"%.3lf uS", (PDC2/(Fclock * )*1000);
                  lcd_puts(lcdBuff30);
                  break;
                  case E:
                  if(MenuItemState == EDIT)
                  {
                  if(QEI_Dir) //up
                  OC1R = OC1R + OptionState;
                  else
                  OC1R = OC1R - OptionState;
                  }
                  if(MenuItemState == SAVE) //save to EEPROM
                  {
                  valblock.SP1ON = OC1R; //store samp puls 1 ON time in ram block
                  save_vars(); //write ram block to EEPROM
                  MenuItemState = NORM; //leave SAVE state
                  }
                  lcd_clear();
                  lcd_goto(0);
                  lcd_puts("S1 PULSE ON AT:\0");
                  lcd_goto(0x40);
                  sprintf(lcdBuff30,"%.3lf uS", (OC1R/Fclock)*2000);
                  lcd_puts(lcdBuff30);
                  break;
                  case F:
                  if(MenuItemState == EDIT)
                  {
                  if(QEI_Dir) //up
                  OC1RS = OC1RS + OptionState;
                  else
                  OC1RS = OC1RS - OptionState;
                  }
                  if(MenuItemState == SAVE) //save to EEPROM
                  {
                  valblock.SP1OFF = OC1RS; //store PWM1 in ram block
                  save_vars(); //write ram block to EEPROM
                  MenuItemState = NORM; //leave SAVE state
                  }
                  lcd_clear();
                  lcd_goto(0);
                  lcd_puts("S1 PULSE OFF AT:\0");
                  lcd_goto(0x40);
                  sprintf(lcdBuff30,"%.3lf uS", (OC1RS/Fclock)*2000);
                  lcd_puts(lcdBuff30);
                  break;
                  case G:
                  if(MenuItemState == EDIT)
                  {
                  if(QEI_Dir) //up
                  OC2R = OC2R + OptionState;
                  else
                  OC2R = OC2R - OptionState;
                  }
                  if(MenuItemState == SAVE) //save to EEPROM
                  {
                  valblock.SP2ON = OC2R; //store samp puls 2 ON time in ram block
                  save_vars(); //write ram block to EEPROM
                  MenuItemState = NORM; //leave SAVE state
                  }
                  lcd_clear();
                  lcd_goto(0);
                  lcd_puts("S2 PULSE ON AT:\0");
                  lcd_goto(0x40);
                  sprintf(lcdBuff30,"%.3lf uS", (OC2R/Fclock)*2000);
                  lcd_puts(lcdBuff30);
                  break;
                  case H:
                  if(MenuItemState == EDIT)
                  {
                  if(QEI_Dir) //up
                  OC2RS = OC2RS + OptionState;
                  else
                  OC2RS = OC2RS - OptionState;
                  }
                  if(MenuItemState == SAVE) //save to EEPROM
                  {
                  valblock.SP2OFF = OC2RS; //store samp puls 2 ON time in ram block
                  save_vars(); //write ram block to EEPROM
                  MenuItemState = NORM; //leave SAVE state
                  }
                  lcd_clear();
                  lcd_goto(0);
                  lcd_puts("S2 PULSE OFF AT:\0");
                  lcd_goto(0x40);
                  sprintf(lcdBuff30,"%.3lf uS", (OC2RS/Fclock)*2000);
                  lcd_puts(lcdBuff30);
                  break;
                  case M:
                  if(MenuItemState == EDIT)
                  {
                  if(QEI_Dir) //up
                  AUDIOrate = AUDIOrate + OptionState;
                  else
                  AUDIOrate = AUDIOrate - OptionState;
                  }
                  if(MenuItemState == SAVE) //save to EEPROM
                  {
                  valblock.AUDIOrate = AUDIOrate; //store audio rate val in ram block
                  save_vars(); //write ram block to EEPROM
                  MenuItemState = NORM; //leave SAVE state
                  }
                  lcd_clear();
                  lcd_goto(0);
                  lcd_puts("AUDIO RATE Value\0");
                  lcd_goto(0x40);
                  sprintf(lcdBuff30,"%u", AUDIOrate);
                  lcd_puts(lcdBuff30);
                  break;
                  default:
                  lcd_clear();
                  lcd_goto(0);
                  lcd_puts("Menu Display Err\0");
                  while(1); //stop here
                  }//END switch
                  }//END if (MenuItemState != OPT)
                  QEI_Event = 0; //reset the flag .. last thing we do
                  }//END function

                  Comment


                  • #10
                    RS232menu.c

                    /*
                    RS232menu.c - serial comms and terminal menu.
                    Copyright (C) 2011 Paul Moody

                    This program is free software: you can redistribute it and/or modify
                    it under the terms of the GNU General Public License as published by
                    the Free Software Foundation, either version 3 of the License, or
                    (at your option) any later version.

                    This program is distributed in the hope that it will be useful,
                    but WITHOUT ANY WARRANTY; without even the implied warranty of
                    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
                    GNU General Public License for more details.

                    You should have received a copy of the GNU General Public License
                    along with this program. If not, see <http://www.gnu.org/licenses/>.
                    */

                    #include "system.h"
                    #include <stdio.h>
                    #include <stdlib.h>
                    #include <math.h>


                    extern char rxbuff[]; // global rx buffer for serial data
                    extern char *rxbuffptr; // local input ptr for storing data
                    extern short int rxrdy; // flag to indicate a line of data is available in buffer

                    extern double Fclock; //input clock frequency in KHz

                    extern struct VALSTORE valblock;
                    extern struct VALSTORE _EEDATA(32) eeblock;

                    extern long ADCval;
                    extern long ADCvalSamp;
                    extern unsigned int ADCvalCount;
                    extern unsigned int ADCvalCountMax;

                    extern long ADCvalSATsamp;
                    extern int SATdiff;
                    extern unsigned int ADCvalSATcountMax;
                    extern volatile unsigned int AUDIOrate; //dds accumulator threshold sum for audio events.


                    extern void save_vars(void);
                    extern void read_vars(void);
                    extern int calc_cksum(int, int *);
                    extern int calc_EE_cksum(int, int *);
                    extern int cksum_OK(int, int *);

                    extern unsigned int PWMscale; //scale value for PWM modulation val/scale

                    void process_serial_buffer()
                    {
                    switch( rxbuff[0] )
                    {
                    case 'A':
                    sscanf(&rxbuff[1],"%u",&valblock.FREQ);
                    if (valblock.FREQ < 737) valblock.FREQ = 737; //need this limit or would have non stop PWM interrupts
                    if (valblock.FREQ > 32767) valblock.FREQ = 32767; //max 15 bits
                    PTPER = valblock.FREQ;
                    PDC2 = PTPER>>5;
                    break;
                    case 'B':
                    sscanf(&rxbuff[1],"%d",&valblock.PWM1);
                    PDC1 = valblock.PWM1;
                    break;
                    case 'C':
                    sscanf(&rxbuff[1],"%d",&valblock.PWM2);
                    //PDC2 = valblock.PWM2;
                    break;
                    case 'E':
                    sscanf(&rxbuff[1],"%d",&valblock.SP1ON);
                    OC1R = valblock.SP1ON;
                    break;
                    case 'F':
                    sscanf(&rxbuff[1],"%d",&valblock.SP1OFF);
                    OC1RS = valblock.SP1OFF;
                    break;
                    case 'G':
                    sscanf(&rxbuff[1],"%d",&valblock.SP2ON);
                    OC2R = valblock.SP2ON;
                    break;
                    case 'H':
                    sscanf(&rxbuff[1],"%d",&valblock.SP2OFF);
                    OC2RS = valblock.SP2OFF;
                    break;
                    case 'K':
                    sscanf(&rxbuff[1],"%d",&valblock.ADCscale);
                    valblock.ADCscale = valblock.ADCscale & 0x000f;
                    break;
                    case 'M':
                    sscanf(&rxbuff[1],"%u",&valblock.AUDIOrate);
                    AUDIOrate = valblock.AUDIOrate;
                    break;
                    case 'X':
                    sscanf(&rxbuff[1],"%lf",&Fclock);
                    break;
                    case 'S':
                    save_vars();
                    if((calc_cksum(sizeof(struct VALSTORE), (int *) &valblock)) == (calc_EE_cksum(sizeof(struct VALSTORE), (int *) &eeblock)))
                    printf("\r\nEEPROM save OK : CHECKSUM OK\r\n");
                    else
                    printf("\r\n!!!!EEPROM save FAILED : CHECKSUM ERROR!!!!\r\n");
                    break;
                    case 'R':
                    read_vars();
                    break;

                    default:
                    printf("\r\nEnter a command : eg A1234 sets Tx freq count to 1234\r\n");
                    }
                    printf("\r\n");
                    printf(VERSION);
                    printf("\r\n");
                    printf("S: Save all vars to EEPROM\r\n");
                    printf("R: Read all vars from EEPROM\r\n");
                    printf(" CHECKSUM: RAM = %i EEPROM = %i\r\n",(calc_cksum((sizeof(struct VALSTORE)), (int *)&valblock)),(calc_EE_cksum((sizeof(struct VALSTORE)), (int *)&eeblock)));
                    printf(" STATUS:\r\n");
                    printf("X: CPU Ref Clock : 4 X %.3lf Khz = %.3lf Mhz\r\n",Fclock, 4*Fclock/1000);
                    printf(" PWM Step is %.3lf Nanosecond\r\n",1000000/(Fclock * 4));
                    printf("A: TX FREQUENCY : Count = %u Freq = %.3lf Khz Period = %.3lf usec\r\n",PTPER, (Fclock * 4)/PTPER, (PTPER/(Fclock * 4))*1000);
                    printf("B: TX PRIMARY PULSE : Count = %u Duty = %.3lf usec\r\n",PDC1, (PDC1/(Fclock * )*1000);
                    printf("C: TX DESCRIM PULSE : Count = %u Duty = %.3lf usec\r\n",PDC2, (PDC2/(Fclock * )*1000);
                    printf(" PWM3 TARGET level : Count = %u Duty = %.3lf usec\r\n",PDC3, (PDC3/(Fclock * )*1000);
                    printf("E: SAMPLE PULSE 1 ON : Count = %u ON = %.3lf usec\r\n", OC1R, (OC1R/Fclock)*2000);
                    printf("F: SAMPLE PULSE 1 OFF : Count = %u OFF = %.3lf usec width = %.3lf usec\r\n", OC1RS, (OC1RS/Fclock)*2000, ((OC1RS - OC1R)/Fclock)*2000);
                    printf("G: SAMPLE PULSE 2 ON : Count = %u ON = %.3lf usec\r\n", OC2R, (OC2R/Fclock)*2000);
                    printf("H: SAMPLE PULSE 2 OFF : Count = %u OFF = %.3lf usec width = %.3lf usec\r\n", OC2RS, (OC2RS/Fclock)*2000, ((OC2RS - OC2R)/Fclock)*2000);
                    printf("K: TARGET PWM scale : %u\r\n", valblock.ADCscale);
                    printf(" ADC sample = %lu [%.6lf Volts]\r\n", ADCvalSamp, ADCvalSamp*(5.0/0x1ffff));
                    printf(" ADC SAT sample = %lu [%.6lf Volts] DIFF = %d [%.6lf Volts]\r\n", ADCvalSATsamp, ADCvalSATsamp*(5.0/0x1ffff), SATdiff, SATdiff*(5.0/0x1ffff));
                    printf("M: AUDIO freq range count = %u\r\n", valblock.AUDIOrate);
                    printf("SELECT Button: %u ZERO Button: %u SAT LOCK Button: %u\r\n", SELECTBUTT, ZEROBUTT, SATLOCKBUTT);
                    // reset input buffer state
                    rxrdy = 0;
                    rxbuff[0] = 0;
                    rxbuffptr = &rxbuff[0];
                    putchar('>');
                    }

                    Comment


                    • #11
                      serial.c

                      /*
                      serial.c - rs232 comms functions :-).
                      Copyright (C) 2011 Paul Moody

                      This program is free software: you can redistribute it and/or modify
                      it under the terms of the GNU General Public License as published by
                      the Free Software Foundation, either version 3 of the License, or
                      (at your option) any later version.

                      This program is distributed in the hope that it will be useful,
                      but WITHOUT ANY WARRANTY; without even the implied warranty of
                      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
                      GNU General Public License for more details.

                      You should have received a copy of the GNU General Public License
                      along with this program. If not, see <http://www.gnu.org/licenses/>.
                      */
                      #include "system.h"
                      #include <uart.h>
                      #include <libpic30.h>

                      #define BAUDRATE 9600 //Desired Baud Rate
                      //#define BAUDRATE 38400 //Desired Baud Rate
                      #define BRGVAL ((FCY/BAUDRATE)/16)-1 //Formula for U1BRG register
                      //from dsPIC30F Family
                      //Reference Manual

                      //Functions and Variables with Global Scope:
                      char *UARTCharPtr;

                      char rxbuff[30]; // global rx buffer for serial data
                      char txbuff[30] = "\r\n UNIPI \r\n\0"; // global tx buffer for serial data
                      char *rxbuffptr; // local input ptr for storing data
                      short int rxrdy; // flag to indicate a line of data is available in buffer

                      void setup_uart(void);
                      void WriteUART_to_RS232(void);
                      void buff2uart(char *);

                      void UART_FlushRX(void);
                      char UART_GetChar(void);

                      void UART_PutChar(char);
                      int write(int, void *, unsigned int);
                      int __C30_UART = 2;

                      void __attribute__((__interrupt__, auto_psv)) _U1TXInterrupt(void);
                      void __attribute__((__interrupt__,auto_psv)) _U1RXInterrupt (void);

                      volatile unsigned int rs232busyflag; //flags that the tx buffer not empty yet

                      //Functions
                      //************************************************** ************************
                      //* Configure the USART
                      // the default stdin,stdout are directed to serial port 1
                      //************************************************** ************************

                      //UART_Init() sets up the UART for a 8-bit data, No Parity, 1 Stop bit
                      //at 9600 baud with transmitter interrupts enabled
                      void setup_uart(void)
                      {
                      U1MODE = 0x0000; //Clear UART1 registers
                      U1STA = 0x0000;

                      //U1MODEbits.ALTIO = 1; //use U1ATX and U1ARX instead of
                      //U1TX and U1RX pins
                      U1MODEbits.ALTIO = 0; //use U1TX and U1RX pins

                      U1MODEbits.UARTEN = 1; //Enable UART1 module
                      U1BRG = BRGVAL; //Load UART1 Baud Rate Generator

                      IFS0bits.U1RXIF = 0; //Clear UART1 Receiver Interrupt Flag
                      IFS0bits.U1TXIF = 0; //Clear UART1 Transmitter Interrupt Flag
                      IEC0bits.U1RXIE = 0; //Disable UART1 Receiver ISR
                      IEC0bits.U1TXIE = 1; //Enable UART1 Transmitter ISR
                      U1STAbits.UTXISEL = 1; //Setup UART1 transmitter to interrupt
                      //when a character is transferred to the
                      //Transmit Shift register and as result,
                      //the transmit buffer becomes empty.

                      U1STAbits.UTXEN = 1; //Enable UART1 transmitter
                      UARTCharPtr = &txbuff[0]; //Initialize UARTCharPtr to point
                      //to the first character in the Display buffer

                      U1STA = UART_TX_ENABLE & UART_TX_PIN_NORMAL; // TX & RX interrupt modes
                      U1STAbits.URXISEL = 0; // rx intr every ch

                      rxbuffptr = &rxbuff[0];
                      rxbuff[0] = 0;
                      rxrdy = 0;

                      IFS0bits.U1RXIF = 0;
                      IEC0bits.U1RXIE = 1; // go live with serial rx intr
                      }


                      //WriteUART_to_RS232() triggers interrupt-driven UART communication by writing
                      //the first character in the Display buffer to the UART Transmit register
                      void buff2uart(char * ptr)
                      {
                      rs232busyflag = 1;
                      UARTCharPtr = ptr; //Re-Initialize UART display
                      U1TXREG = *UARTCharPtr++; //Load the UART transmit register with first character
                      IFS0bits.U1TXIF = 0; //Clear the UART1 transmitter interrupt flag
                      while (rs232busyflag); //flags that the tx buffer not empty yet
                      }

                      //_U1TXInterrupt() is the UART1 Interrupt Service Routine.
                      //The routine must have global scope in order to be an ISR.
                      //The ISR name is the same name provided for the module in the device linker
                      //script.
                      //The UART1 ISR loads the UART1 4-deep FIFO buffers with the next
                      //4 characters in the Display buffer unless it encounters a null character.
                      void __attribute__((__interrupt__, auto_psv)) _U1TXInterrupt(void)
                      {
                      int i = 0;
                      while (i < 4)
                      {
                      if (*UARTCharPtr == '\0')
                      {
                      rs232busyflag--;
                      break;
                      }
                      else
                      {
                      U1TXREG = *UARTCharPtr++;
                      i++;
                      }
                      }
                      IFS0bits.U1TXIF = 0; //Clear the UART1 transmitter interrupt flag
                      }

                      int write(int handle, void *buffer, unsigned int len)
                      {
                      int i;
                      switch (handle)
                      {
                      case 0: // handle 0 corresponds to stdout
                      case 1: // handle 1 corresponds to stdin
                      case 2: // handle 2 corresponds to stderr
                      default:
                      for (i=0; i<len; i++)
                      UART_PutChar(*(char*)buffer++);
                      }
                      return(len);
                      }


                      void UART_PutChar(char c)
                      {
                      while (U1STAbits.UTXBF); // Wait for space in UART2 Tx buffer
                      U1TXREG = c; // Write character to UART2
                      }

                      char UART_GetChar()
                      {
                      while (!U1STAbits.URXDA);
                      return U1RXREG;
                      }

                      void UART_FlushRX()
                      {
                      unsigned char c;
                      while (!U1STAbits.URXDA)
                      c = U1RXREG;
                      }

                      /************************************************** *******************
                      Function: void __attribute__((__interrupt__)) _U1RXInterrupt (void)
                      Summary: Handles uart rx interrupt
                      ************************************************** ******************/

                      void __attribute__((__interrupt__,auto_psv)) _U1RXInterrupt (void)
                      {
                      char ch;

                      IFS0bits.U1RXIF = 0;

                      while (U1STAbits.URXDA)
                      {
                      ch = U1RXREG & 0xFF;
                      // save the character if there is room in the input buffer
                      if ( ch == 0x0a )
                      continue; // strip LF

                      if ( ch == 0x0d )
                      {
                      // end of input stream..
                      // flag we have something to process
                      *rxbuffptr = 0; // null terminate buffer
                      rxrdy = 1;
                      break;
                      }

                      // if we have room in the buffer, store the ch for later processing
                      if (rxbuffptr < (&rxbuff[0] + sizeof(rxbuff) - 2 ))
                      {
                      // still working on filling buffer
                      *rxbuffptr++ = ch;
                      UART_PutChar(ch);
                      }
                      }
                      }

                      Comment


                      • #12
                        timers.c

                        /*
                        timers.c - hardware timer functions.
                        Copyright (C) 2011 Paul Moody

                        This program is free software: you can redistribute it and/or modify
                        it under the terms of the GNU General Public License as published by
                        the Free Software Foundation, either version 3 of the License, or
                        (at your option) any later version.

                        This program is distributed in the hope that it will be useful,
                        but WITHOUT ANY WARRANTY; without even the implied warranty of
                        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
                        GNU General Public License for more details.

                        You should have received a copy of the GNU General Public License
                        along with this program. If not, see <http://www.gnu.org/licenses/>.
                        */
                        #include "system.h"

                        volatile unsigned int timer1_count;

                        /************************************************** *******************
                        Function: void __attribute__((__interrupt__)) _T1Interrupt (void)
                        ************************************************** ******************/

                        void __attribute__((__interrupt__ , auto_psv)) _T1Interrupt (void)
                        {

                        IFS0bits.T1IF = 0;

                        if ( timer1_count == 0 )
                        T1CONbits.TON = 0; //timer 1 off.
                        else
                        {
                        TMR1 = 0;
                        timer1_count--;
                        }
                        }

                        /************************************************** *******************
                        Function: void __attribute__((__interrupt__)) _T2Interrupt (void)
                        ************************************************** ******************/

                        void __attribute__((__interrupt__ , auto_psv)) _T2Interrupt (void)
                        {
                        IFS0bits.T2IF = 0;
                        T2CONbits.TON = 0; //timer 2 off.
                        }

                        /************************************************** *******************
                        Function: void __attribute__((__interrupt__)) _T3Interrupt (void)
                        ************************************************** ******************/

                        void __attribute__((__interrupt__ , auto_psv)) _T3Interrupt (void)
                        {
                        IFS0bits.T3IF = 0;
                        T3CONbits.TON = 0; //timer 3 off.
                        }


                        /************************************************** *******************
                        Function: void setupTMR1(void)
                        ************************************************** ******************/

                        void setup_TMR1(void)
                        {
                        IPC0bits.T1IP = 6; //lowest priority interrupt
                        T1CONbits.TCKPS = 0; // timer 1 prescale = 1
                        TMR1 = 0;
                        PR1 = (737 * 4); //set timer preset
                        //T1CON = 0x0000; //internal Tcy/1 clock
                        IFS0bits.T1IF = 0; //interupt flag clear
                        IEC0bits.T1IE = 1; //Enable Timer1 Interrupt Service Routine
                        T1CONbits.TON = 1; //timer 1 on
                        return;
                        }


                        /************************************************** *******************
                        Function: void setupTMR2(void)
                        ************************************************** ******************/

                        void setup_TMR2(void)
                        {
                        IEC0bits.T2IE = 0; // Disable Timer2 Interrupt Service Routine
                        T2CONbits.TCKPS = 1; // timer 2 prescale = 8
                        TMR2 = 0;
                        PR2 = 2000;
                        T2CONbits.TON = 1; //timer 2 on
                        return;
                        }
                        /************************************************** *******************
                        Function: void setupTMR3(void)
                        ************************************************** ******************/

                        void setup_TMR3(void)
                        {
                        IEC0bits.T3IE = 0; // Disable Timer3 Interrupt Service Routine
                        T3CON = 0x0000; // internal Tcy/1 clock
                        TMR3 = 0;
                        PR3 = 2500;
                        T3CONbits.TON = 0; // timer 3 off
                        return;
                        }

                        /************************************************** *******************
                        Function: void delay_tmr1(unsigned int)
                        ************************************************** ******************/

                        /* delay routine */
                        void delay_tmr1(unsigned int delay)
                        {
                        timer1_count = delay;
                        setup_TMR1();
                        while(timer1_count);
                        }

                        Comment


                        • #13
                          vars.c

                          /*
                          vars.c - save and read variables from eeprom.
                          Copyright (C) 2011 Paul Moody

                          This program is free software: you can redistribute it and/or modify
                          it under the terms of the GNU General Public License as published by
                          the Free Software Foundation, either version 3 of the License, or
                          (at your option) any later version.

                          This program is distributed in the hope that it will be useful,
                          but WITHOUT ANY WARRANTY; without even the implied warranty of
                          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
                          GNU General Public License for more details.

                          You should have received a copy of the GNU General Public License
                          along with this program. If not, see <http://www.gnu.org/licenses/>.
                          */
                          #include <stdio.h>
                          #include "p30fxxxx.h"
                          #include "system.h"

                          extern unsigned int AUDIOrate;

                          struct VALSTORE _EEDATA(32) eeblock; //EE size request must be power of 2
                          volatile struct VALSTORE valblock;

                          int calc_cksum(int, int *);
                          extern int cksum_OK(int, int *);

                          unsigned int PWMscale;

                          extern int WriteWord(int *, int);
                          extern int ReadWord(int *);

                          void read_vars(void)
                          {
                          int i;
                          int * source = (int *) &eeblock;
                          int * dest = (int *) &valblock;

                          for (i=0; i < sizeof(struct VALSTORE); i++)
                          *(dest++) = ReadWord(source++);
                          //make sure there is a valid TX PWM rate :-)
                          if ((valblock.FREQ <= 7370) & (valblock.FREQ >= 737))
                          PTPER = valblock.FREQ;
                          else PTPER = 7370;
                          PDC1 = valblock.PWM1;
                          PDC2 = PTPER>>5;
                          OC1R = valblock.SP1ON;
                          OC1RS = valblock.SP1OFF;
                          OC2R = valblock.SP2ON;
                          OC2RS = valblock.SP2OFF;
                          valblock.ADCscale = valblock.ADCscale & 0x000f;
                          valblock.SATscale = valblock.SATscale & 0x000f;
                          AUDIOrate = valblock.AUDIOrate;
                          }



                          void save_vars(void)
                          {
                          int i, sum;
                          int * source = (int *) &valblock;
                          int * dest = (int *) &eeblock;
                          sum = calc_cksum(sizeof(struct VALSTORE), source); //calc checksum
                          for (i=0; i < (sizeof(struct VALSTORE) - 1); i++)
                          WriteWord(dest++, *(source++));
                          WriteWord(dest, sum); // store the checksum
                          }

                          //================================================== ===========================
                          // Routine to calculate a checksum on a section of memory
                          // call with array size in 16 bit words and ptr to start.
                          //================================================== ===========================
                          int calc_cksum(int sizew, int *adr)
                          {
                          int i;
                          int cksum = 0;
                          for (i=0; i < (sizew - 1); i++) //-1 so dont include checksum itself
                          cksum += *adr++;
                          return cksum;
                          }

                          //================================================== ===========================
                          // Routine to calculate a checksum on a section of EE memory
                          // call with array size in 16 bit words and ptr to start.
                          //================================================== ===========================
                          int calc_EE_cksum(int sizew, int *adr)
                          {
                          int i;
                          int cksum = 0;
                          for (i=0; i < (sizew - 1); i++) //-1 so dont include checksum itself
                          cksum += ReadWord(adr++);
                          return cksum;
                          }
                          //================================================== ===========================
                          // Routine to calculate a checksum on a section of memory
                          // call with array size in 16 bit words and ptr to start.
                          // checksum is at end of block and test if OK ... return 1 for OK
                          //================================================== ===========================
                          int cksum_OK(int sizew, int *adr)
                          {
                          int i;
                          int cksum = 0;

                          for (i=0; i < (sizew - 1); i++) //-1 so dont include checksum itself
                          cksum += *adr++;
                          if (cksum == *adr)
                          return 1;
                          else
                          return 0;
                          }

                          //================================================== ===========================
                          // Routine to calculate a checksum on a section of EE memory
                          // call with array size in 16 bit words and ptr to start.
                          // checksum is at end of block and test if OK ... return 1 for OK
                          //================================================== ===========================
                          int cksum_EE_OK(int sizew, int *adr)
                          {
                          int i;
                          int cksum = 0;

                          for (i=0; i < (sizew - 1); i++) //-1 so dont include checksum itself
                          cksum += ReadWord(adr++);
                          if (cksum == ReadWord(adr))
                          return 1;
                          else
                          return 0;
                          }

                          Comment


                          • #14
                            system.h

                            /*
                            system.h - various things needed by all code blocks.
                            Copyright (C) 2011 Paul Moody

                            This program is free software: you can redistribute it and/or modify
                            it under the terms of the GNU General Public License as published by
                            the Free Software Foundation, either version 3 of the License, or
                            (at your option) any later version.

                            This program is distributed in the hope that it will be useful,
                            but WITHOUT ANY WARRANTY; without even the implied warranty of
                            MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
                            GNU General Public License for more details.

                            You should have received a copy of the GNU General Public License
                            along with this program. If not, see <http://www.gnu.org/licenses/>.
                            */
                            #include <p30f4012.h>

                            #define VERSION "MooDz UNIPI v230"

                            #define FCY 29240000 // 29 MIPS ==> 7.3mhz rc osc * PLL16 /4

                            // define some i/o bits for the various modules
                            #define STATUS_LED _RB2

                            #define SELECTBUTT _RC13
                            #define ZEROBUTT _RC14
                            #define SATLOCKBUTT _RC15

                            #define AUDIO _RE8 //pin16

                            #define TRUE (1)
                            #define FALSE (0)

                            // for some reason these are not defined in the UART.h of the C30 compiler
                            // I am using, so I manually add them here if necessary
                            #ifndef UART_ALTRX_ALTTX
                            #define UART_ALTRX_ALTTX 0xFFE7 /*Communication through ALT pins*/
                            #endif
                            #ifndef UART_RX_TX
                            #define UART_RX_TX 0xFBE7 /*Communication through the normal pins*/
                            #endif

                            #define DEBOUNCE (5) /* button debounce */

                            //OptionState state values//
                            #define OptNORM 0
                            #define OptX1 1
                            #define OptX10 10
                            #define OptX100 100
                            #define OptSAVE 4
                            #define OptEXIT 5

                            //MenuState state values//
                            #define A 1
                            #define B 2
                            #define C 3
                            #define D 4
                            #define E 5
                            #define F 6
                            #define G 7
                            #define H 8
                            #define I 9
                            #define J 10
                            #define K 11
                            #define L 12
                            #define M 13
                            #define N 14
                            #define O 15
                            #define P 16
                            #define Q 17
                            #define R 18
                            #define S 19
                            #define T 20
                            #define U 21
                            #define V 22
                            #define W 23
                            #define X 24
                            #define Y 25
                            #define Z 26

                            //MenuItemState state values//
                            #define RUN 0
                            #define NORM 1
                            #define EDIT 2
                            #define SAVE 3
                            #define OPT 4

                            struct VALSTORE
                            {
                            double FCLOCK;
                            unsigned int FREQ;
                            unsigned int PWM1;
                            unsigned int PWM2;
                            unsigned int SP1ON;
                            unsigned int SP1OFF;
                            unsigned int SP2ON;
                            unsigned int SP2OFF;
                            unsigned int ADCscale;
                            unsigned int SATscale;
                            unsigned int AUDIOrate;
                            struct
                            {
                            unsigned unused : 16;
                            } bitfield16;
                            int CHECKSUM;
                            };

                            Comment


                            • #15
                              .... the complete MPLAB project files for v230 30F4012



                              Metal23.zip

                              moodz

                              Comment

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