ADC channel 19 not working in 18FXXK22.dat file

[Rikki]

I'm attempting to read ADC channel AN19 (via portc.7) on a 18F13k22 chip without success.

Here is a sample of the code

dim my_variable as word
dir portc.7 in
my_variable = readAD10(AN19)

readAD(AN19) does not work either

The same code works fine with ADC channel AN2 via portA.2

After reading through the 18F13k22 datasheet I tried adding /modifying these lines in the 18f13k22.dat file without success:

ADC=19
ADCConstants=AN{0..19} USAGE:AN0..AN19
added CHS4,ADCON0,6

While these changes didn't appear to break anything they didn't make ADC channel AN19 work.

Any help would be appreciated thanks

[Anobium]

Is 18F13k22 correct ?

Ummmm. I do no think the 18F13k22 chip as has AN19... that looks like an error in the DAT non-functional information.

If my version here: Build 12899. I see ADCConstants AN{0..12} USAGE:AN0..AN12 These constants are the valid ADC constants which should be ADCConstants AN{0..12} USAGE:AN0..AN11

Where, portc.7 is AN9

[Rikki]

Apologies, I downloaded the wrong datasheet (18f2x)
Tested AN9 via portc.7 and it's working. Apologies for taking up your valuable time.

[Anobium]

No problem.

I recommend always to use PICINFO to open the correct datasheet.

:-)