analogReference(uint8_t mode) function not implemented

[fgaetani]

Unfortunately, I noticed that the analogReference(uint8_t mode) function is not implemented in wiring_analog.cpp. It would be useful to have a function that uses the internal voltage reference at 0.6V and the relative multiplier. I await updates.

[facchinm]

Hi @fgaetani ,
thanks for spotting this, I'll be working on a fix soon 😉

[fgaetani]

Hi @facchinm, are there any news regarding this implementation? Thank you!

[facchinm]

No news unfortunately, mbed code still configures the channel on init() (https://github.com/ARMmbed/mbed-os/blob/master/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/analogin_api.c#L96) so overriding it is impossible ATM.
Anyway it could be a target of #31 if I find some time to complete it.

[fgaetani]

Ok thank you very much, I hope soon!

[Gerriko]

Any update on this?

I quite like Adafruit's implementation although no idea how they've done it.

https://learn.adafruit.com/introducing-the-adafruit-nrf52840-feather/nrf52-adc

[facchinm]

analogReference is now implemented for nRF52 microcontrollers on https://github.com/arduino/ArduinoCore-mbed (beta version, can be tested by downloading Portenta core from Board manager) or beta branch.
Testing and reporting results is, as always, appreciated 🙂