PIC32 ADC Problem

[Bill Legge]

My set-up is:
Easy PIC Fusion v7
PIC32MX795F512L MCU at 80MHz

I'll post some minimalist code,if necessary, but problem may be resolved:

1. Compile, build and program - everything is OK, ADC and display works fine.
2. Cycle power on the Easy PIC Fusion board - and it stops working.

Any ideas?

Regards Bill Legge in Australia.

[hexreader]

Yes please - post minimalist project - whole project not just the code

I have same hardware and with luck, I may be able to reproduce the problem

Zip and attach the whole project folder as .zip file, not just the C code - I need to see full project setup (especially configuration bits)

First wild guesses might be:

1 Invalid oscillator frequency selections (see datasheet oscillator requirements)

2 A variable that should be initialised, but was not

3 Insufficient initialisation time for some peripheral such as UART or LCD

4 I2C device not responding

5 Something else that I have not thought about

[Bill Legge]

As usual - thanks very much for that.
I think your list of possible problems is probably correct.
I will work on some tidy 'minimalist code' that reproduces the fault and post it.
Never had these ADC problems before!

Regards Bill Legge in Australia

[Bill Legge]

Many hours of fiddling with my code and ZERO progress!
Re-wrote minimalist code and -all OK.
'Added' the rest of the code in small chunks - all OK.

So, now I'm back to my original and it's all working.
Certainly wasn't the oscillator settings as RS232 and TFT worked OK.
All variables initialized.
Unfortunately, I did not keep a copy of the code that did not work!

Only thing that may have happened - once in a blue moon my PC (or compiler?) inserts a small, almost invisible character ` that stuffs up the code.
Thanks for your offer to investigate.

Regards Bill Legge in Australia.

[filip]

Hi,

Have you tried the default ADC example from the compiler ?

Regards,
Filip.

[Bill Legge]

Filip - thanks for the suggestion.
The code example works OK and my own code also does now!
Nothing wrong with the compiler or hardware - just my poor coding.
Unfortunately I failed to identify my error during the re-write.
My project is to make and automated morse code transmitter and receiver.
The idea was to use the latest technology to mimic the oldest form of electronic communications.
I guess my great age is showing!
I'll publish it in the 'USER PROJECTS' section of the forum.

Regards Bill Legge in australia