Question on variant

[fpistm]

Hi, could you expand a bit the Add new board wiki with info about how to set properly the analogs?, because I'm having problems with my variant for the F030C8, when I tried to read PA0 ( analogRead(PA0) ) it really reads the PA3, for the moment I solve it by using analogRead(PA_0). So I was under the impression that only has to match the:
NUM_ANALOG_FIRST on the variant.h file with the duplicates on the digitalPin array on variant.cpp, but it seems that may be more to it, right?. Thanks.

Originally posted by @r-pv in #722 (comment)

[fpistm]

Hi @r-pv
you issue is that some analog pins have an number less than NUM_ANALOG_INPUTS
in your case it is equal to 10. So when you request PA0 you get this value:
#define PA0 3
which in fact in the Ax equivalent to A3 .
All Analog pin PYn must have a number greater or equal to NUM_ANALOG_INPUTS
This is what it means here
// First analog pin value (A0) must be greater than or equal to NUM_ANALOG_INPUTS

Maybe it could be rewrote like that:
// First analog pin value (A0) and all analog pin PYn must have a number greater or equal to NUM_ANALOG_INPUTS

[r-pv]

Thanks for the reply, ups I got that wrong, I was thinking that the number was referring to the duplicates index and that was the reason they were written at last of the digitalPin array.

[fpistm]

The reason to duplicate is to have all analog pins contiguous in order to be able to loop on it:

for (int i=0; i< NUM_ANALOG_INPUTS; i++) {
Serial.print(analogRead(i);
}

If in your definition they already are contiguous hen no need to duplicate.

[r-pv]

awesome, mr @fpistm, I can fix my variants now. And sorry for keep taking your time.

[fpistm]

Welcome