stm32/adc: Allow using ADC12 and ADC3 for H7.
* Modify common functions in adc.c to accept ADC handle. * Most external channels are connected to ADC12 which is used by default. * For ADCAll (internal channels) ADC3 is used instead. * Issue #4435 is possibly related (at least partially fixed).
This commit is contained in:
iabdalkader
Damien George
parent
d1decdfa93
commit
ff7be31f26
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@ -51,16 +51,9 @@
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/// val = adc.read_core_vref() # read MCU VREF
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/* ADC defintions */
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#if defined(STM32H7)
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#define ADCx (ADC3)
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#define PIN_ADC_MASK PIN_ADC3
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#define pin_adc_table pin_adc3
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#else
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#define ADCx (ADC1)
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#define PIN_ADC_MASK PIN_ADC1
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#define pin_adc_table pin_adc1
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#endif
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#define ADCx_CLK_ENABLE __HAL_RCC_ADC1_CLK_ENABLE
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@ -142,7 +135,7 @@
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defined(STM32F746xx) || defined(STM32F765xx) || \
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defined(STM32F767xx) || defined(STM32F769xx)
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#define VBAT_DIV (4)
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#elif defined(STM32H743xx)
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#elif defined(STM32H743xx) || defined(STM32H747xx)
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#define VBAT_DIV (4)
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#elif defined(STM32L432xx) || \
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defined(STM32L451xx) || defined(STM32L452xx) || \
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@ -214,12 +207,12 @@ STATIC bool is_adcx_channel(int channel) {
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#endif
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}
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STATIC void adc_wait_for_eoc_or_timeout(int32_t timeout) {
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STATIC void adc_wait_for_eoc_or_timeout(ADC_HandleTypeDef *adcHandle, int32_t timeout) {
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uint32_t tickstart = HAL_GetTick();
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#if defined(STM32F4) || defined(STM32F7)
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while ((ADCx->SR & ADC_FLAG_EOC) != ADC_FLAG_EOC) {
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while ((adcHandle->Instance->SR & ADC_FLAG_EOC) != ADC_FLAG_EOC) {
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#elif defined(STM32F0) || defined(STM32H7) || defined(STM32L4) || defined(STM32WB)
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while (READ_BIT(ADCx->ISR, ADC_FLAG_EOC) != ADC_FLAG_EOC) {
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while (READ_BIT(adcHandle->Instance->ISR, ADC_FLAG_EOC) != ADC_FLAG_EOC) {
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#else
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#error Unsupported processor
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#endif
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@ -229,11 +222,15 @@ STATIC void adc_wait_for_eoc_or_timeout(int32_t timeout) {
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}
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}
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STATIC void adcx_clock_enable(void) {
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STATIC void adcx_clock_enable(ADC_HandleTypeDef *adch) {
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#if defined(STM32F0) || defined(STM32F4) || defined(STM32F7)
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ADCx_CLK_ENABLE();
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#elif defined(STM32H7)
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if (adch->Instance == ADC3) {
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__HAL_RCC_ADC3_CLK_ENABLE();
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} else {
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__HAL_RCC_ADC12_CLK_ENABLE();
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}
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__HAL_RCC_ADC_CONFIG(RCC_ADCCLKSOURCE_CLKP);
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#elif defined(STM32L4) || defined(STM32WB)
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if (__HAL_RCC_GET_ADC_SOURCE() == RCC_ADCCLKSOURCE_NONE) {
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@ -246,9 +243,8 @@ STATIC void adcx_clock_enable(void) {
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}
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STATIC void adcx_init_periph(ADC_HandleTypeDef *adch, uint32_t resolution) {
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adcx_clock_enable();
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adcx_clock_enable(adch);
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adch->Instance = ADCx;
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adch->Init.Resolution = resolution;
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adch->Init.ContinuousConvMode = DISABLE;
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adch->Init.DiscontinuousConvMode = DISABLE;
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@ -308,6 +304,7 @@ STATIC void adc_init_single(pyb_obj_adc_t *adc_obj) {
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mp_hal_pin_config(pin, MP_HAL_PIN_MODE_ADC, MP_HAL_PIN_PULL_NONE, 0);
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}
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adc_obj->handle.Instance = ADCx;
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adcx_init_periph(&adc_obj->handle, ADC_RESOLUTION_12B);
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#if defined(STM32L4) && defined(ADC_DUALMODE_REGSIMULT_INJECSIMULT)
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@ -335,7 +332,11 @@ STATIC void adc_config_channel(ADC_HandleTypeDef *adc_handle, uint32_t channel)
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#if defined(STM32F0)
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sConfig.SamplingTime = ADC_SAMPLETIME_55CYCLES_5;
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#elif defined(STM32F4) || defined(STM32F7)
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if (__HAL_ADC_IS_CHANNEL_INTERNAL(channel)) {
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sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES;
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} else {
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sConfig.SamplingTime = ADC_SAMPLETIME_15CYCLES;
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}
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#elif defined(STM32H7)
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if (__HAL_ADC_IS_CHANNEL_INTERNAL(channel)) {
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sConfig.SamplingTime = ADC_SAMPLETIME_810CYCLES_5;
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@ -370,8 +371,8 @@ STATIC void adc_config_channel(ADC_HandleTypeDef *adc_handle, uint32_t channel)
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STATIC uint32_t adc_read_channel(ADC_HandleTypeDef *adcHandle) {
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HAL_ADC_Start(adcHandle);
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adc_wait_for_eoc_or_timeout(EOC_TIMEOUT);
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uint32_t value = ADCx->DR;
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adc_wait_for_eoc_or_timeout(adcHandle, EOC_TIMEOUT);
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uint32_t value = adcHandle->Instance->DR;
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HAL_ADC_Stop(adcHandle);
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return value;
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}
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@ -529,19 +530,19 @@ STATIC mp_obj_t adc_read_timed(mp_obj_t self_in, mp_obj_t buf_in, mp_obj_t freq_
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} else {
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// for subsequent samples we can just set the "start sample" bit
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#if defined(STM32F4) || defined(STM32F7)
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ADCx->CR2 |= (uint32_t)ADC_CR2_SWSTART;
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self->handle.Instance->CR2 |= (uint32_t)ADC_CR2_SWSTART;
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#elif defined(STM32F0) || defined(STM32H7) || defined(STM32L4) || defined(STM32WB)
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SET_BIT(ADCx->CR, ADC_CR_ADSTART);
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SET_BIT(self->handle.Instance->CR, ADC_CR_ADSTART);
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#else
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#error Unsupported processor
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#endif
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}
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// wait for sample to complete
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adc_wait_for_eoc_or_timeout(EOC_TIMEOUT);
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adc_wait_for_eoc_or_timeout(&self->handle, EOC_TIMEOUT);
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// read value
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uint value = ADCx->DR;
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uint value = self->handle.Instance->DR;
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// store value in buffer
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if (typesize == 1) {
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@ -608,9 +609,9 @@ STATIC mp_obj_t adc_read_timed_multi(mp_obj_t adc_array_in, mp_obj_t buf_array_i
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adc_config_channel(&adc0->handle, adc0->channel);
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HAL_ADC_Start(&adc0->handle);
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// Wait for sample to complete and discard
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adc_wait_for_eoc_or_timeout(EOC_TIMEOUT);
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adc_wait_for_eoc_or_timeout(&adc0->handle, EOC_TIMEOUT);
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// Read (and discard) value
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uint value = ADCx->DR;
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uint value = adc0->handle.Instance->DR;
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// Ensure first sample is on a timer tick
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__HAL_TIM_CLEAR_FLAG(tim, TIM_FLAG_UPDATE);
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@ -639,17 +640,17 @@ STATIC mp_obj_t adc_read_timed_multi(mp_obj_t adc_array_in, mp_obj_t buf_array_i
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// for the first sample we need to turn the ADC on
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// ADC is started: set the "start sample" bit
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#if defined(STM32F4) || defined(STM32F7)
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ADCx->CR2 |= (uint32_t)ADC_CR2_SWSTART;
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adc->handle.Instance->CR2 |= (uint32_t)ADC_CR2_SWSTART;
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#elif defined(STM32F0) || defined(STM32H7) || defined(STM32L4) || defined(STM32WB)
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SET_BIT(ADCx->CR, ADC_CR_ADSTART);
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SET_BIT(adc->handle.Instance->CR, ADC_CR_ADSTART);
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#else
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#error Unsupported processor
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#endif
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// wait for sample to complete
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adc_wait_for_eoc_or_timeout(EOC_TIMEOUT);
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adc_wait_for_eoc_or_timeout(&adc->handle, EOC_TIMEOUT);
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// read value
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value = ADCx->DR;
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value = adc->handle.Instance->DR;
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// store values in buffer
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if (typesize == 1) {
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@ -723,13 +724,24 @@ void adc_init_all(pyb_adc_all_obj_t *adc_all, uint32_t resolution, uint32_t en_m
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if (en_mask & (1 << channel)) {
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// Channels 0-16 correspond to real pins. Configure the GPIO pin in
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// ADC mode.
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#if defined(STM32H7)
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const pin_obj_t *pin = pin_adc3[channel];
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#else
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const pin_obj_t *pin = pin_adc_table[channel];
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#endif
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if (pin) {
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mp_hal_pin_config(pin, MP_HAL_PIN_MODE_ADC, MP_HAL_PIN_PULL_NONE, 0);
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}
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}
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}
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#if defined(STM32H7)
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// On the H7 the internal channels are connected to ADC3. To read internal channels
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// with ADCAll, ADC3 must be used here, and ADC12 is used to read the GPIO channels.
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adc_all->handle.Instance = ADC3;
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#else
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adc_all->handle.Instance = ADCx;
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#endif
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adcx_init_periph(&adc_all->handle, resolution);
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}
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