QUERY · ISSUE

machine.RTC.init throws exception on Pyboard 1.0

openby peterhinchopened 2020-01-16updated 2021-02-07

docsport-stm32

The code example in the docs fails with a surprising traceback.

rtc = machine.RTC()
rtc.init((2014, 5, 1, 4, 13, 0, 0, 0))

Outcome:

MicroPython v1.12-61-g0f16eeab2 on 2020-01-16; PYBv1.0 with STM32F405RG
Type "help()" for more information.
>>> 
>>> from machine import RTC
>>> rtc = RTC()
>>> rtc.init((2014, 5, 1, 4, 13, 0, 0, 0))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: function takes 1 positional arguments but 2 were given

CANDIDATE · PULL REQUEST

stm32: Fix issues for STM32G0.

mergedby yn386opened 2025-09-21updated 2025-09-23

port-stm32

Summary

This PR is patch set for STM32G0.

Refactor clock settings for STM32G0.
Clock definition should be in mpconfigboard.h and use them at clock initialization.
Fix pyb.ADC issue when reading internal sensors.
```
import pyb
a=pyb.ADCAll(12,0x70033)
a.read_core_temp()
```
-> Got invalid value: -93.78223
Fix machine.ADC issue when machine.ADC is called.
```
import machine
a=machine.ADC(1)
```
-> machine.ADC does not return and board needs hardware reset.

Fix Timer(4) returns error.

import pyb
t=pyb.Timer(4)

-> Got following exception even STM32G0 has TIM4.

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: Timer(4) doesn't exist

Fix pyb.RTC and machine.RTC does not work.
- RTC did not initialized.
```
import pyb
rtc=pyb.RTC()
rtc.datetime()
```
  -> Got invalid datetime (2000, 0, 0, 0, 0, 0, 0, 0).
- The board need hardware reset when RTC.wakeup is woke up.
```
import pyb
rtc=pyb.RTC()
rtc.wakeup(0)
```

Testing

Tested:

NUCLEO_G0B1RE

Trade-offs and Alternatives

This PR contains #18111.