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stm32/machine_adc: Fix machine.ADC so it works on STM32G0.

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Fixes are:
- Enable VREG before initializing ADC.
- The channel value of internal sensor should convert with
  __LL_ADC_CHANNEL_TO_DECIMAL_NB().

Signed-off-by: Yuuki NAGAO <wf.yn386@gmail.com>
This commit is contained in:
Yuuki NAGAO
2025-09-21 10:07:53 +09:00
committed by Damien George
parent 7ba82219f3
commit ddf1a383ca
1 changed files with 8 additions and 2 deletions
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10
ports/stm32/machine_adc.c
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@@ -244,12 +244,12 @@ void adc_config(ADC_TypeDef *adc, uint32_t bits) {
}
#endif
#if defined(STM32G4) || defined(STM32H5) || defined(STM32H7) || defined(STM32L0) || defined(STM32L4) || defined(STM32WB) || defined(STM32WL)
#if defined(STM32G0) || defined(STM32G4) || defined(STM32H5) || defined(STM32H7) || defined(STM32L0) || defined(STM32L4) || defined(STM32WB) || defined(STM32WL)
if (!(adc->CR & ADC_CR_ADVREGEN)) {
adc->CR = ADC_CR_ADVREGEN; // enable VREG
#if defined(STM32H7)
mp_hal_delay_us(10); // T_ADCVREG_STUP
#elif defined(STM32G4) || defined(STM32L4) || defined(STM32WB)
#elif defined(STM32G0) || defined(STM32G4) || defined(STM32L4) || defined(STM32WB)
mp_hal_delay_us(20); // T_ADCVREG_STUP
#endif
}
@@ -379,6 +379,12 @@ static void adc_config_channel(ADC_TypeDef *adc, uint32_t channel, uint32_t samp
#else
adc->SMPR = sample_time << ADC_SMPR_SMP_Pos; // select sample time
#endif
#if defined(STM32G0)
if (__LL_ADC_IS_CHANNEL_INTERNAL(channel)) {
channel = __LL_ADC_CHANNEL_TO_DECIMAL_NB(channel);
}
#endif
adc->CHSELR = 1 << channel; // select channel for conversion
#elif defined(STM32F4) || defined(STM32F7)