HH2 Option 1 source code

[Carl-NC]

Here is the source code for Option 1. It's posted as a txt file and should be renamed 'HH2Option1.c'. I used MPLAB IDE and the HiTech C compiler, both free from the Microchip web site.

- Carl

[Carl-NC]

I just posted revised code. Minor error, PWM pin should have been defined as INPUT.

[Ray-NM]

Programming

Carl
I have been looking at programming kits and if I am correct we could use the Microchip Pickit 2 and use the pic12f683ip chip.
Raynm

[Carl-NC]

You will need MPLAB and the Hi-Tech C compiler, both free from Microchip, and a programmer. I'm using Pickit 3 and I assume Pickit 2 will work as well. The I/P version of the chip is fine.

- Carl

[geminis74]

Hi Carl, you can place the file directly .hex, thanks

[Altra]

This is the firmware I wrote for the HH2. It is written
in assembly language.

Tx pulse = 100uS at 1000hz
Sample delay adjustable using AN0 from 3uS to 300uS
Sample 1 and 2 are 15uS
PWM is 600hz

All of these can be changed to fit your needs.

You can assemble the file with Mpasm, free from microchip
use "default" settings. Rename HH_2_ASM.txt to HH_2_ASM.asm

Regards mark

[WM6]

This is the firmware I wrote for the HH2. It is written
in assembly language.

Tx pulse = 100uS at 1000hz
Sample delay adjustable using AN0 from 3uS to 300uS
Sample 1 and 2 are 15uS
PWM is 600hz

All of these can be changed to fit your needs.

You can assemble the file with Mpasm, free from microchip
use "default" settings. Rename HH_2_ASM.txt to HH_2_ASM.asm

Regards mark

Hi Altra,

you are the greatest living uC developer.

Thank you

[johnandles]

This is the firmware I wrote for the HH2. It is written
in assembly language.

Tx pulse = 100uS at 1000hz
Sample delay adjustable using AN0 from 3uS to 300uS
Sample 1 and 2 are 15uS
PWM is 600hz

All of these can be changed to fit your needs.

You can assemble the file with Mpasm, free from microchip
use "default" settings. Rename HH_2_ASM.txt to HH_2_ASM.asm

Regards mark

Hello Altra thanks for posting code,
The pot connected to AN0 would 1k linear with a 470 ohm attached to the wiper be ok?
Cheers
John

[jtz54]

So this mod would be an externally adjustable delay? Exactly how is this hooked up and has anyone tried the code and setup? Thanks in advance!

[Altra]

Yes the code allows you to change the sample delay externally. A variable resistor (10K) connected between the Vcc and Vdd with the wiper connected to pin 7 on the pic chip. By adjusting the voltage going to the A to D converter (AN0) you can increase or decrease the delay. The code works. Sorry I don't have time to draw a schematic.

Mark

[jtz54]

Thanks so much for your reply and efforts on this project. How is the HH2 working for you?

[Altra]

It worked good on my bench. I built it as an experiment and to evaluate the front end circuits. Its not a cut and dry project. There are different options, some board modifications and pic programing. If you want a straight forward project build the Hammer Head I. Lots of info, everything is adjustable with resistors and capacitors. If you want to experiment with micro processors build this one(HH2). If you are just learning to program, study C. It is the universal engineering language for micros.

[KingJL]

This is the firmware I wrote for the HH2. It is written
in assembly language.

Tx pulse = 100uS at 1000hz
Sample delay adjustable using AN0 from 3uS to 300uS
Sample 1 and 2 are 15uS
PWM is 600hz

All of these can be changed to fit your needs.

You can assemble the file with Mpasm, free from microchip
use "default" settings. Rename HH_2_ASM.txt to HH_2_ASM.asm

Regards mark

Altra, if you haven't already discovered this, the assembly code has sample 1 and sample 2 GPIO pins out puts reversed.

[6666]

Did anybody get a working hex file compiled from Altra's ASM file ?

I have tried using Mpasm V5.11
but when I try and compile it , it says there are 67 errors
any help appreciated, I would like to try and get this working thanks

[6666]

I have downloaded the latest version of Mplab IDE v8.76
and tried to compile the asm code to hex
and the program tells me it worked
I get this hex code does it match anybody else's hex code compiled from Altra's asm?

:020000040000FA
:040000006B20322817
:08000800A0000308A10083120F
:100010000C1C2D28831220308E008312FC308F00A0
:1000200085104330A500A50B132885142208013E36
:10003000A500A50B192805120A30A500A50B1E283E
:1000400005168530A500A50B232885120A30A500CA
:10005000A50B2828851683120C1021088300A00EFA
:10006000200E0900831675308F008316013085003D
:10007000831207309900831651309F00831201309C
:100080009F00831240308B00831601308C00831256
:1000900000308C00831215309000831220308E00C7
:1000A0008312FC308F0083128B171F140000000096
:1000B0000000000000000000000000000000000040
:1000C0009F149F18612883121E08A20083161E0821
:1000D000A300831255288316CF3092008312073075
:0E00E000920093013C309500673093000800B9
:02400E00D433A9
:00000001FF