GPIO26 and 27 has ADC, but does work?

milkv-duo / duo-buildroot-sdk

Milk-V Duo Official buildroot SDK

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Open pauloantuns opened 10 months ago

pauloantuns commented 10 months ago

The only "analogRead" function that i found on wiringx.h it's commented. (// int analogRead ... ) in duo-sdk/rootfs/usr/include/wiringx.h

There's any method to read analog data with the currently firmware version? From the Duo Datasheet we can see the ADC pins.

MarkMLl commented 7 months ago

Is GPIO27 available? According to https://github.com/milkv-duo/accessories/blob/master/Duo_USB%26Ethernet_IOB/duo_iob_v1.11.pdf (sheet 2) the IOB puts a pullup on it... I think the intention is that a pushbutton can optionally enable a network interface on USB even if the default is Ethernet.

pauloantuns commented 7 months ago

Hi @MarkMLl ! Yes, GPIO 27 is available. I was able to find a solution to use the ADC module on the board and subimitted to merge. Check the github examples page: https://github.com/milkv-duo/duo-examples/tree/main/adc