adc and pic24

[mikn]

Hi

When I set interrupt frequency to 8khz and use adc base to catch analog input then save it to file, it works. But when I try to set interrupt to more frequent value (16khz or faster) it reboots the controller. Even I am not using save to file function (just accumulate values and calculate the average for every 5 catches).

Also there's another problem. When I try to use GetAverageByte it freezes the whole chip. I've played with adc settings but nothing helped.
This is the reason why I've made my own average algorythm in adc_read macro.

Some screenshots are below. The whole project is big so I don't publish it here.

Any advices are appreciated.

chip is pic24fj64ga

[Rudi]

Hi

When I set interrupt frequency to 8khz and use adc base to catch analog input then save it to file, it works. But when I try to set interrupt to more frequent value (16khz or faster) it reboots the controller. Even I am not using save to file function (just accumulate values and calculate the average for every 5 catches).

Also there's another problem. When I try to use GetAverageByte it freezes the whole chip. I've played with adc settings but nothing helped.
This is the reason why I've made my own average algorythm in adc_read macro.

Some screenshots are below. The whole project is big so I don't publish it here.

Any advices are appreciated.

chip is pic24fj64ga

Hi,,
have you seen this
http://www.matrixmultimedia.com/mmforum ... 790#p59641
can you try this ?
Best wishes!
Rudi

[mikn]

Some more troubles.
I've added cal_adc to my project.
Pressed twice on current macro block, changed it from adc_base.getbyte to cal_adc.sample.
Then when I press to field Sample I get error and FC closes.

sc-adc-dead1.GIF (18.79 KiB) Viewed 5234 times

sc-adc-dead.GIF

(106.71 KiB) Downloaded 598 times

[Rudi]

Some more troubles.
I've added cal_adc to my project.
Pressed twice on current macro block, changed it from adc_base.getbyte to cal_adc.sample.
Then when I press to field Sample I get error and FC closes.

You are not allone i am with you
http://www.matrixmultimedia.com/mmforum ... 885#p60221


I work in PIC18F2550, because PIC24 do not like me but i think this is a general goes wrong.
Best wishes
Rudi

[mikn]

yeah, seems like FC is more friendly to atmel rather than to microchip..

[Rudi]

yeah, seems like FC is more friendly to atmel rather than to microchip..

ha ha ha .... an advantage does that have: You learn a lot in this short time. Try Serach Try ... Try Search Try i am sure ..everything will be fine.. and If the test phases of the woods, then FC6 is the best thing ever. While it sucks immensely - but it seems to us also benefit - ... Microchip users