AnalogReference

[Yannick-Marietti]

For compatibility concerns, is it possible to implement a "dummy" analogReference() function ?

This function is often used by teachers to explain ADC principle using Arduino UNO boards.
Of course, if STM32 ADC can be set to a level different than 3.3 Volts, a future working implementation would be a must-have for teachers.

BR

Yannick

[firexx]

in the current version 2.5.0 used
void analogReference(eAnalogReference ulMode)
prototype, instead of original in Arduino:
void analogReference(uint8_t mode);
so the compatibility is not provided

[fpistm]

Original was with eAnalogReference which is an enum.
Example in the samd core:
https://github.com/arduino/ArduinoCore-sam/blob/790ff2c852bf159787a9966bddee4d9f55352d15/cores/arduino/wiring_analog.h#L40

Now within the Arduino Core API:
https://github.com/arduino/ArduinoCore-API/blob/master/api/Common.h#L100

anyway, the mode always defined as an enum but with different name like with the mbed core:
https://github.com/arduino/ArduinoCore-mbed/blob/0504d34ada3d5aac69eacb481bcdc64860aebca9/variants/NICLA/pins_arduino.h#L13

As the function is provided just for compatibility (be able to build) and do nothing as the arguments is unused and also match an uint8_t value it is compatible.