stmhal: L4: Modify adc.c to add support for STM32L4 series.
Tobias Badertscher
Damien George
parent
69f26c68c9
commit
d49a547064
108
stmhal/adc.c
108
stmhal/adc.c
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@ -65,6 +65,8 @@
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defined(STM32F437xx) || defined(STM32F439xx) || \
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defined(STM32F746xx)
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#define VBAT_DIV (4)
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#elif defined(STM32L476xx)
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#define VBAT_DIV (3)
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#else
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#error Unsupported processor
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#endif
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@ -80,8 +82,45 @@ typedef struct _pyb_obj_adc_t {
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ADC_HandleTypeDef handle;
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} pyb_obj_adc_t;
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STATIC bool is_adcx_channel(int channel) {
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#if defined(MCU_SERIES_F4) || defined(MCU_SERIES_F7)
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return IS_ADC_CHANNEL(channel);
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#elif defined(MCU_SERIES_L4)
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ADC_HandleTypeDef handle;
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handle.Instance = ADCx;
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return IS_ADC_CHANNEL(&handle, channel);
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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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STATIC void adc_wait_for_eoc_or_timeout(int32_t timeout) {
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uint32_t tickstart = HAL_GetTick();
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#if defined(MCU_SERIES_F4) || defined(MCU_SERIES_F7)
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while ((ADCx->SR & ADC_FLAG_EOC) != ADC_FLAG_EOC) {
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#elif defined(MCU_SERIES_L4)
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while (READ_BIT(ADCx->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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if (((HAL_GetTick() - tickstart ) > timeout)) {
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break; // timeout
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}
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}
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}
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STATIC void adcx_clock_enable(void) {
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#if defined(MCU_SERIES_F4) || defined(MCU_SERIES_F7)
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ADCx_CLK_ENABLE();
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#elif defined(MCU_SERIES_L4)
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__HAL_RCC_ADC_CLK_ENABLE();
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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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STATIC void adc_init_single(pyb_obj_adc_t *adc_obj) {
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if (!IS_ADC_CHANNEL(adc_obj->channel)) {
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if (!is_adcx_channel(adc_obj->channel)) {
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return;
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}
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@ -97,22 +136,33 @@ STATIC void adc_init_single(pyb_obj_adc_t *adc_obj) {
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HAL_GPIO_Init(pin->gpio, &GPIO_InitStructure);
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}
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ADCx_CLK_ENABLE();
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adcx_clock_enable();
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ADC_HandleTypeDef *adcHandle = &adc_obj->handle;
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adcHandle->Instance = ADCx;
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adcHandle->Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2;
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adcHandle->Init.Resolution = ADC_RESOLUTION12b;
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adcHandle->Init.ScanConvMode = DISABLE;
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adcHandle->Init.ContinuousConvMode = DISABLE;
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adcHandle->Init.DiscontinuousConvMode = DISABLE;
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adcHandle->Init.NbrOfDiscConversion = 0;
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adcHandle->Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
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adcHandle->Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
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adcHandle->Init.DataAlign = ADC_DATAALIGN_RIGHT;
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adcHandle->Init.NbrOfConversion = 1;
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adcHandle->Init.DMAContinuousRequests = DISABLE;
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adcHandle->Init.EOCSelection = DISABLE;
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#if defined(MCU_SERIES_F4) || defined(MCU_SERIES_F7)
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adcHandle->Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2;
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adcHandle->Init.ScanConvMode = DISABLE;
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adcHandle->Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
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#elif defined(MCU_SERIES_L4)
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adcHandle->Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV2;
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adcHandle->Init.ScanConvMode = ADC_SCAN_DISABLE;
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adcHandle->Init.ExternalTrigConv = ADC_EXTERNALTRIG_T1_CC1;
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adcHandle->Init.LowPowerAutoWait = DISABLE;
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adcHandle->Init.Overrun = ADC_OVR_DATA_PRESERVED;
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adcHandle->Init.OversamplingMode = DISABLE;
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#else
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#error Unsupported processor
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#endif
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HAL_ADC_Init(adcHandle);
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}
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@ -122,7 +172,13 @@ STATIC void adc_config_channel(pyb_obj_adc_t *adc_obj) {
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sConfig.Channel = adc_obj->channel;
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sConfig.Rank = 1;
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#if defined(MCU_SERIES_F4) || defined(MCU_SERIES_F7)
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sConfig.SamplingTime = ADC_SAMPLETIME_15CYCLES;
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#elif defined(MCU_SERIES_L4)
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sConfig.SamplingTime = ADC_SAMPLETIME_12CYCLES_5;
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#else
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#error Unsupported processor
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#endif
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sConfig.Offset = 0;
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HAL_ADC_ConfigChannel(&adc_obj->handle, &sConfig);
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@ -173,7 +229,7 @@ STATIC mp_obj_t adc_make_new(const mp_obj_type_t *type, mp_uint_t n_args, mp_uin
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channel = pin->adc_channel;
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}
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if (!IS_ADC_CHANNEL(channel)) {
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if (!is_adcx_channel(channel)) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "not a valid ADC Channel: %d", channel));
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}
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if (pin_adc1[channel] == NULL) {
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@ -274,17 +330,18 @@ 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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HAL_ADC_Start(&self->handle);
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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(MCU_SERIES_F4) || defined(MCU_SERIES_F7)
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ADCx->CR2 |= (uint32_t)ADC_CR2_SWSTART;
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#elif defined(MCU_SERIES_L4)
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SET_BIT(ADCx->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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uint32_t tickstart = HAL_GetTick();
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while ((ADCx->SR & ADC_FLAG_EOC) != ADC_FLAG_EOC) {
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#define READ_TIMED_TIMEOUT (10) // in ms
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if (((HAL_GetTick() - tickstart ) > READ_TIMED_TIMEOUT)) {
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break; // timeout
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}
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}
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#define READ_TIMED_TIMEOUT (10) // in ms
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adc_wait_for_eoc_or_timeout(READ_TIMED_TIMEOUT);
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// read value
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uint value = ADCx->DR;
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@ -357,22 +414,33 @@ void adc_init_all(pyb_adc_all_obj_t *adc_all, uint32_t resolution) {
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HAL_GPIO_Init(pin->gpio, &GPIO_InitStructure);
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}
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ADCx_CLK_ENABLE();
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adcx_clock_enable();
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ADC_HandleTypeDef *adcHandle = &adc_all->handle;
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adcHandle->Instance = ADCx;
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adcHandle->Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2;
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adcHandle->Init.Resolution = resolution;
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adcHandle->Init.ScanConvMode = DISABLE;
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adcHandle->Init.ContinuousConvMode = DISABLE;
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adcHandle->Init.DiscontinuousConvMode = DISABLE;
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adcHandle->Init.NbrOfDiscConversion = 0;
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adcHandle->Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
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adcHandle->Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
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adcHandle->Init.DataAlign = ADC_DATAALIGN_RIGHT;
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adcHandle->Init.NbrOfConversion = 1;
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adcHandle->Init.DMAContinuousRequests = DISABLE;
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adcHandle->Init.EOCSelection = DISABLE;
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#if defined(MCU_SERIES_F4) || defined(MCU_SERIES_F7)
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adcHandle->Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2;
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adcHandle->Init.ScanConvMode = DISABLE;
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adcHandle->Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
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#elif defined(MCU_SERIES_L4)
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adcHandle->Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV2;
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adcHandle->Init.ScanConvMode = ADC_SCAN_DISABLE;
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adcHandle->Init.ExternalTrigConv = ADC_EXTERNALTRIG_T1_CC1;
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adcHandle->Init.LowPowerAutoWait = DISABLE;
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adcHandle->Init.Overrun = ADC_OVR_DATA_PRESERVED;
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adcHandle->Init.OversamplingMode = DISABLE;
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#else
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#error Unsupported processor
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#endif
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HAL_ADC_Init(adcHandle);
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}
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@ -381,7 +449,13 @@ uint32_t adc_config_and_read_channel(ADC_HandleTypeDef *adcHandle, uint32_t chan
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ADC_ChannelConfTypeDef sConfig;
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sConfig.Channel = channel;
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sConfig.Rank = 1;
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#if defined(MCU_SERIES_F4) || defined(MCU_SERIES_F7)
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sConfig.SamplingTime = ADC_SAMPLETIME_15CYCLES;
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#elif defined(MCU_SERIES_L4)
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sConfig.SamplingTime = ADC_SAMPLETIME_12CYCLES_5;
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#else
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#error Unsupported processor
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#endif
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sConfig.Offset = 0;
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HAL_ADC_ConfigChannel(adcHandle, &sConfig);
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