ChTheo/RFG_stm32_ADC_STM32F429
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implemented DMA-based averager. Avg res is dumped to USB_VCP. But it is not compiles

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This commit is contained in:
Theodor Chikin
2025-12-18 20:03:14 +03:00
parent 55a6a91260
commit d0ef88b6b9
4 changed files with 1174 additions and 752 deletions
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37
Core/Src/main.c
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@ -59,6 +59,14 @@ static void MX_ADC1_Init(void);
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
struct ADC_proc{
uint8_t status; // 0 - stopped, 1 - started-filling, 2 - filled
uint32_t sum;
uint32_t avg;
uint32_t N;
} adc_process;
#define ADC_BUFF_SIZE 100
uint16_t ADC1_buff_circular[ADC_BUFF_SIZE];
/* USER CODE END 0 */
@ -98,6 +106,11 @@ int main(void)
/* USER CODE BEGIN 2 */
HAL_GPIO_WritePin(LED_BLUE_GPIO_Port, LED_BLUE_Pin, GPIO_PIN_SET);
HAL_ADC_Start_DMA(&hadc1, (uint32_t*)ADC1_buff_circular, ADC_BUFF_SIZE);
adc_process.status = 0; // ADC started
adc_process.N = 0;
adc_process.sum = 0;
adc_process.avg = 0;
/* USER CODE END 2 */
/* Infinite loop */
@ -106,7 +119,31 @@ int main(void)
{
HAL_GPIO_TogglePin(LED_RED_GPIO_Port, LED_RED_Pin);
HAL_Delay(100);
if (adc_process.status == 2) {
adc_process.avg = adc_process.sum / adc_process.N;
adc_process.status = 1; // reset for next accumulation
adc_process.sum = 0;
adc_process.N = 0;
char digits[10] = {0};
digits[0] = (adc_process.avg / 1000000000) % 10 + '0';
digits[1] = (adc_process.avg / 100000000) % 10 + '0';
digits[2] = (adc_process.avg / 10000000) % 10 + '0';
digits[3] = (adc_process.avg / 1000000) % 10 + '0';
digits[4] = (adc_process.avg / 100000) % 10 + '0';
digits[5] = (adc_process.avg / 10000) % 10 + '0';
digits[6] = (adc_process.avg / 1000) % 10 + '0';
digits[7] = (adc_process.avg / 100) % 10 + '0';
digits[8] = (adc_process.avg / 10) % 10 + '0';
digits[9] = (adc_process.avg / 1) % 10 + '0';
CDC_Transmit_FS((uint8_t *)"ADC Average calculated: ", 24);
CDC_Transmit_FS((uint8_t *)digits, 10);
CDC_Transmit_FS((uint8_t *)"\r\n", 2);
}
CDC_Transmit_FS((uint8_t *)"Hello from STM32!\r\n", 19);
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */

12
Core/Src/stm32f4xx_it.c
View File

@ -58,7 +58,7 @@
extern PCD_HandleTypeDef hpcd_USB_OTG_FS;
extern DMA_HandleTypeDef hdma_adc1;
/* USER CODE BEGIN EV */
extern struct ADC_proc adc_process;
/* USER CODE END EV */
/******************************************************************************/
@ -232,6 +232,11 @@ void OTG_FS_IRQHandler(void)
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
{
HAL_GPIO_WritePin(LED_BLUE_GPIO_Port, LED_BLUE_Pin, GPIO_PIN_SET);
for (uint32_t i = ADC_BUFF_SIZE/2; i < ADC_BUFF_SIZE; i++) {
adc_process.sum += ADC1_buff_circular[i];
}
adc_process.N += ADC_BUFF_SIZE - ADC_BUFF_SIZE/2;
adc_process.status = 2; // buffer filled
// This function is called when the first half of the ADC buffer is filled
// You can process the first half of ADC1_buff_circular here
}
@ -243,6 +248,11 @@ void HAL_ADC_ConvHalfCpltCallback(ADC_HandleTypeDef* hadc)
//HAL_GPIO_WritePin(LED_BLUE_GPIO_Port, LED_BLUE_Pin, GPIO_PIN_RESET);
HAL_GPIO_TogglePin(LED_BLUE_GPIO_Port, LED_BLUE_Pin);
for (uint32_t i = 0; i < ADC_BUFF_SIZE/2; i++) {
adc_process.sum += ADC1_buff_circular[i];
}
adc_process.N += ADC_BUFF_SIZE/2;
// This function is called when the first half of the ADC buffer is filled
// You can process the first half of ADC1_buff_circular here
}