Posted on September 19, 2016 at 20:31I�m having difficulty getting the ADC to work on the F303 board in the the value returned is always 0. The input line is PA0, ADC1, Chanel 1.
The STM32cubeMX generated initialization code is as follows:
hadc1.Instance = ADC1;
hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;
hadc1.Init.Resolution = ADC_RESOLUTION_12B;
hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
hadc1.Init.ContinuousConvMode = DISABLE;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc1.Init.NbrOfConversion = 1;
hadc1.Init.DMAContinuousRequests = DISABLE;
hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
hadc1.Init.LowPowerAutoWait = DISABLE;
hadc1.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
HAL_ADC_Init(&hadc1);
This function returns HAL_OK
sConfig.Channel = ADC_CHANNEL_1;
sConfig.Rank = 1;
sConfig.SingleDiff = ADC_SINGLE_ENDED;
sConfig.SamplingTime = ADC_SAMPLETIME_7CYCLES_5;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
HAL_ADC_ConfigChannel(&hadc1, &sConfig);
This function returns HAL_OK
The following code is in HAL_ADC_MspInit() in stm32f3xx_hal_msp.c:
void HAL_ADC_MspInit(ADC_HandleTypeDef* hadc)
{
GPIO_InitTypeDef GPIO_InitStruct;
if(hadc->Instance==ADC1)
{
/* USER CODE BEGIN ADC1_MspInit 0 */
/* USER CODE END ADC1_MspInit 0 */
/* Peripheral clock enable */
__HAL_RCC_ADC12_CLK_ENABLE();
/**ADC1 GPIO Configuration
PA0 ------> ADC1_IN1
*/
GPIO_InitStruct.Pin = DEFROSTER_SENSE_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(DEFROSTER_SENSE_GPIO_Port, &GPIO_InitStruct);
/* USER CODE BEGIN ADC1_MspInit 1 */
/* USER CODE END ADC1_MspInit 1 */
}
}
My normal (periodic) processing:
HAL_ADC_Start(&hadc1);
This function returns HAL_OK
HAL_ADC_PollForConversion(&hadc1, HAL_MAX_DELAY);
This function returns HAL_OK
nADCValue = HAL_ADC_GetValue(&hadc1);
This function always returns 0.
Help appreciated.
#stm32f303-adc
