machine.ADC(4) - initialization becoming corrupted

[arajnak]

sensor_temp = machine.ADC(4) - initialization becoming corrupted by subsequent port allocations e.g.
Vsys = machine.ADC(0)

Will result in temp reading of 84 C instead of 24 C from ADC(4)
When done in the reversed order placing ADC(4) last, it works fine.

Vsys = machine.ADC(0)
Vbus = machine.ADC(1)
Vout = machine.ADC(2)
sensor_temp = machine.ADC(4) # works

[aallan]

Is this a general bug report for MicroPython in general, or a bug in a specific piece of example code in this repo?

[arajnak]

This is a general bug report for the MicroPython machine module implementation.

[aallan]

'kay. Thanks.

The RP2040 MicroPython port has now been merged upstream to the main MicroPython repo, see micropython/micropython#6791. You're going to need to report problems with the port and the machine.* module there, https://github.com/micropython/micropython/.

[aallan]

We can reproduce the bug. Can you file an issue upstream? /cc @dpgeorge

[benevpi]

I've reproduced this and created this issue: micropython/micropython#6833 if you've got any extra info to add, that'd be helpful.

[arajnak]

Thanks, will do. From: Alasdair Allan <notifications@github.com> Reply to: raspberrypi/pico-micropython-examples <reply@reply.github.com> Date: Tuesday, 2 February 2021 at 21:10 To: raspberrypi/pico-micropython-examples <pico-micropython-examples@noreply.github.com> Cc: Antal Rajnak <antal.rajnak@gmail.com>, Author <author@noreply.github.com> Subject: Re: [raspberrypi/pico-micropython-examples] machine.ADC(4) - initialization becoming corrupted (#13) We can reproduce the bug. Can you file an issue upstream? /cc @dpgeorge — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.