diff options
| author | Yuuki NAGAO <wf.yn386@gmail.com> | 2025-07-03 20:47:00 +0900 |
|---|---|---|
| committer | Damien George <damien@micropython.org> | 2025-07-08 14:01:41 +1000 |
| commit | eaffbacb10783c769dc46a61b9eea65fcb7413fe (patch) | |
| tree | 17b21622ae40d6ef94801fdcce5a56eadad5ad76 | |
| parent | 42cfa7cdaeef455e3744ee8a21a5a423926e211f (diff) | |
stm32/machine_adc: Add machine.ADC implementation for STM32L1.
Signed-off-by: Yuuki NAGAO <wf.yn386@gmail.com>
| -rw-r--r-- | ports/stm32/adc.c | 2 | ||||
| -rw-r--r-- | ports/stm32/machine_adc.c | 29 |
2 files changed, 29 insertions, 2 deletions
diff --git a/ports/stm32/adc.c b/ports/stm32/adc.c index 10d781259..28e254ace 100644 --- a/ports/stm32/adc.c +++ b/ports/stm32/adc.c @@ -416,7 +416,7 @@ static void adc_config_channel(ADC_HandleTypeDef *adc_handle, uint32_t channel) if (__HAL_ADC_IS_CHANNEL_INTERNAL(channel)) { sConfig.SamplingTime = ADC_SAMPLETIME_384CYCLES; } else { - sConfig.SamplingTime = ADC_SAMPLETIME_384CYCLES; + sConfig.SamplingTime = ADC_SAMPLETIME_16CYCLES; } #elif defined(STM32G0) if (__HAL_ADC_IS_CHANNEL_INTERNAL(channel)) { diff --git a/ports/stm32/machine_adc.c b/ports/stm32/machine_adc.c index aa72fc68d..77d6248d0 100644 --- a/ports/stm32/machine_adc.c +++ b/ports/stm32/machine_adc.c @@ -80,7 +80,7 @@ #define ADC_SAMPLETIME_DEFAULT ADC_SAMPLETIME_12CYCLES_5 #define ADC_SAMPLETIME_DEFAULT_INT ADC_SAMPLETIME_160CYCLES_5 #elif defined(STM32L1) -#define ADC_SAMPLETIME_DEFAULT ADC_SAMPLETIME_384CYCLES +#define ADC_SAMPLETIME_DEFAULT ADC_SAMPLETIME_16CYCLES #define ADC_SAMPLETIME_DEFAULT_INT ADC_SAMPLETIME_384CYCLES #elif defined(STM32L4) || defined(STM32WB) #define ADC_SAMPLETIME_DEFAULT ADC_SAMPLETIME_12CYCLES_5 @@ -225,6 +225,8 @@ void adc_config(ADC_TypeDef *adc, uint32_t bits) { ADC3_COMMON->CCR = 3 << ADC_CCR_CKMODE_Pos; #elif defined(STM32L0) ADC1_COMMON->CCR = 0; // ADCPR=PCLK/2 + #elif defined(STM32L1) + ADC1_COMMON->CCR = 1 << ADC_CCR_ADCPRE_Pos; // ADCPRE=2 #elif defined(STM32WB) ADC1_COMMON->CCR = 0 << ADC_CCR_PRESC_Pos | 0 << ADC_CCR_CKMODE_Pos; // PRESC=1, MODE=ASYNC #elif defined(STM32WL) @@ -385,6 +387,31 @@ static void adc_config_channel(ADC_TypeDef *adc, uint32_t channel, uint32_t samp } *smpr = (*smpr & ~(7 << (channel * 3))) | sample_time << (channel * 3); // select sample time + #elif defined(STM32L1) + + ADC_Common_TypeDef *adc_common = ADC1_COMMON; + if (channel == ADC_CHANNEL_VREFINT || channel == ADC_CHANNEL_TEMPSENSOR) { + adc_common->CCR |= ADC_CCR_TSVREFE; + if (channel == ADC_CHANNEL_TEMPSENSOR) { + adc_stabilisation_delay_us(ADC_TEMPSENSOR_DELAY_US); + } + } + + adc->SQR1 = (1 - 1) << ADC_SQR1_L_Pos; + adc->SQR5 = (channel & 0x1f) << ADC_SQR5_SQ1_Pos; + + __IO uint32_t *smpr; + if (channel >= 20) { + smpr = &adc->SMPR1; + channel -= 20; + } else if (channel >= 10) { + smpr = &adc->SMPR2; + channel -= 10; + } else { + smpr = &adc->SMPR3; + } + *smpr = (*smpr & ~(7 << (channel * 3))) | sample_time << (channel * 3); // select sample time + #elif defined(STM32G4) || defined(STM32H5) || defined(STM32H7) || defined(STM32L4) || defined(STM32WB) #if defined(STM32G4) || defined(STM32H5) || defined(STM32H7A3xx) || defined(STM32H7A3xxQ) || defined(STM32H7B3xx) || defined(STM32H7B3xxQ) |