dspic30f4011 4 sample pulses

[6666]

Hi Moodz
would it be possible to get a copy of the latest code for the 4011 please
and is it still without the xtal ?
thanks
6666

[moodz]

Hi Moodz
would it be possible to get a copy of the latest code for the 4011 please
and is it still without the xtal ?
thanks
6666

Here it is ... however you need to connect 10 Mhz Crystal.

The serial port is currently on the programming pins ....

moodz.

Metal23_4011.zip

[6666]

Thanks Moodz
and this cct is still valid with 10mhz xtal
cheers
6666

[moodz]

Thanks Moodz
and this cct is still valid with 10mhz xtal
cheers
6666

.... it should work ... the rs232 comes out of the ICSP port not as indicated on the drawing ( convenient for pickit2 UART tool ). 10 Mhz instead of 4 Mhz

I wired up the board but not with an LCD or rotary switch ... works OK on serial port. Let me know if it works or I will change code :-)

moodz

[nick_f]

Hi Moodz,
I compiled successfully the source code you provided (after I specified the new locations for p30f4012.inc and p30f4012.gld files). I also had to set the heap size into Build Options->MPLAB Link30 - I set 1000bytes, is it ok?). When I use the PICKit2 programmer, I get a warning that "Some configuration words not in hex file. Ensure the default values above right are acceptable.".There is a Configure->Configuration Bits tab in MPLab, do we have to select some values in there, or can you provide a configuration in the code?

Regards,
Nicolae

[moodz]

the heap only needs to be set to 200 bytes ...

the remaining settings as follows ..

moodz

[maca404]

Hey moodz and all, Just getting back in to some detector design after a hiatus and was out detecting the other day and had an idea and I want to know if it has ever been implemented. Using a gyro or accelerometer to adjust the speed of the filter based on head speed, Where I am in central Vic the ground is a bi%$h and can change tone three times in the one sweep the main thing that defines a signal though is how long it is present, so sweeping slow it will be present longer and faster it will just be a blip. Normally this wouldn't be an issue but if you are sweeping fairly fast and hit a hot pocket of ground it comes through as a signal but if you where running the filter update a bit faster it wouldn't. You could make the base update timing user settable and then adjust it according to head speed ?. Hopefully this made sense and im not just rambling.

[nick_f]

the heap only needs to be set to 200 bytes ...

the remaining settings as follows ..

moodz

[ATTACH]17930[/ATTACH]

Hi Moodz,
Thank you very much for the details. It appears there are some settings straight into code that overwrite what you mentioned in the screenshot for the configuration bits (for example, the code instructs for internal RC oscillator, while the config settings are selecting an external crystal). All these are basic things and easy to change for people who have a bit of experience with PIC programming.
Also, the Pic Kit 2 software still raises the warning no matter what I tick/untick in the configuration bits, maybe this is a bug in the Microchip software? You indicated protection of the code, if I understand in your settings, but won't this prevent updating the chip with a newer version?

Best regards,
Nicolae

[moodz]

Hey moodz and all, Just getting back in to some detector design after a hiatus and was out detecting the other day and had an idea and I want to know if it has ever been implemented. Using a gyro or accelerometer to adjust the speed of the filter based on head speed, Where I am in central Vic the ground is a bi%$h and can change tone three times in the one sweep the main thing that defines a signal though is how long it is present, so sweeping slow it will be present longer and faster it will just be a blip. Normally this wouldn't be an issue but if you are sweeping fairly fast and hit a hot pocket of ground it comes through as a signal but if you where running the filter update a bit faster it wouldn't. You could make the base update timing user settable and then adjust it according to head speed ?. Hopefully this made sense and im not just rambling.

Hi Maca ... that makes sense ... the filter parameters could be driven off the sweep speed.
I will have a think about it and see what we can come up with.

moodz.

[moodz]

Hi Moodz,
Thank you very much for the details. It appears there are some settings straight into code that overwrite what you mentioned in the screenshot for the configuration bits (for example, the code instructs for internal RC oscillator, while the config settings are selecting an external crystal). All these are basic things and easy to change for people who have a bit of experience with PIC programming.
Also, the Pic Kit 2 software still raises the warning no matter what I tick/untick in the configuration bits, maybe this is a bug in the Microchip software? You indicated protection of the code, if I understand in your settings, but won't this prevent updating the chip with a newer version?

Best regards,
Nicolae

Hi Nick .. the original code did use the internal oscillator however there was too much jitter so we switched to a crystal.

this is the line of code that does this ...

_FOSC(CSW_FSCM_OFF & XT_PLL16 ); // 10mhz * 16 / 4 = 40 mips on ext osc


Some other settings like brownout and start up delay and tx pulse polarity are set by ...

/* enablebrownout @4.2v, 64ms powerup delay, MCLR pin NOT active */
#ifdef BUILD_TXLO
_FBORPOR(PBOR_ON & BORV_42 & PWRT_64 & MCLR_DIS & PWMxL_ACT_LO); //TX pulse is active lo
#else
_FBORPOR(PBOR_ON & BORV_42 & PWRT_64 & MCLR_DIS & PWMxL_ACT_HI); //TX pulse is active hi
#endif


and finally the code protection settings only prevent the chip being copied ... they dont prevent it being reprogrammed ... this code does this....

#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


Post up your software versions ... there are bugs ( features ) in different versions.

Press help / about MPLAB IDE and then press copy. ( see below ).

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regards and happy new year...
moodz

[maca404]

Once I have this circuit up and running I want to try and incorporate the gyro in the setup the way I imagine it you would use the velocity to calculate the length of the sweep and then find out how long the signal was present, then based on the known speed and width of the head you could work out approximately how wide the object is. You could then adjust the speed of the filter to cope with the ground and choose to reject objects over a certain size to help with patches of hot rocks .

Hi Maca ... that makes sense ... the filter parameters could be driven off the sweep speed.
I will have a think about it and see what we can come up with.

moodz.

[Orbit]

Excellent moodz I'll try to implement it you pic and the idea the original device gs 4 !
-thank you !!

[6666]

I compiled successfully the source code you provided (after I specified the new locations for p30f4012.inc

Nick-F
does this mean you have 4 pulses coming out of the 4012 ?
care to share your hex please ?

[nick_f]

Hi Nick .. the original code did use the internal oscillator however there was too much jitter so we switched to a crystal.

this is the line of code that does this ...

regards and happy new year...
moodz

Happy New Year, everybody!
Hi Moodz,
Thanks a lot for explanations. I installed the latest MPLab Suite just a few days ago, so I should have everything up to date. I see the integrated software for PicKit2 is v3.63. However, I was using a standalone version of software for PicKit2, which is v2.61.
I am not sure if I can launch the v3.63 independent of the MPLab, I used to do the programming separate from the MPLab. Anyway, I will try with the integrated programming software. At the moment I don't have any board to install the DSPIC into, I'll have to build something.

Best regards,
Nicolae

[nick_f]

Nick-F
does this mean you have 4 pulses coming out of the 4012 ?
care to share your hex please ?

Hi 6666,
Not at all, I don't have a board to test the microcontroller, all I've done was to prepare the files and compile them (to generate the hex file). I don't know what pulses are coming out of the microcontroller. Ask Moodz nicely to provide the latest hex file

Regards,
Nicolae