Posted on July 15, 2018 at 03:45
#stm32f7-nucleo #hal-adc-dma-triplemode #hal-adc #adc-configuration
Hi folks,
I'm stuck trying to run ADC Triple interleaved mode. When I try to run at 7.2MSPS, it never executes the while(1) loop in main function. When I use the Clock Prescaler as PCLK2 divided by 6 (resulting 12MHz ADC Clock), the results are printed on UART but it shows wrong values (like 268374015 in 3.3V). I've tried to get my inspiration at the STM32F7 examples that have Triple Interleaved Mode. What am I doing wrong?
My main code is:
/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/__IO uint32_t g_val[3];char g_adcResult[16];/* USER CODE END PV *//* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);static void MX_GPIO_Init(void);static void MX_DMA_Init(void);static void MX_USART3_UART_Init(void);static void MX_ADC1_Init(void);static void MX_ADC2_Init(void);static void MX_ADC3_Init(void);/* USER CODE BEGIN PFP */
/* Private function prototypes -----------------------------------------------*//* USER CODE END PFP */
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point. * * @retval None */int main(void){ /* USER CODE BEGIN 1 *//* USER CODE END 1 */
/* Enable I-Cache-------------------------------------------------------------*/
SCB_EnableICache();/* Enable D-Cache-------------------------------------------------------------*/
SCB_EnableDCache();/* MCU Configuration----------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init(); MX_DMA_Init(); MX_USART3_UART_Init(); MX_ADC1_Init(); MX_ADC2_Init(); MX_ADC3_Init(); /* USER CODE BEGIN 2 */ uint8_t clear[] = ''\033[2J\033[H''; HAL_UART_Transmit(&huart3, clear, sizeof clear, 100); uint8_t init[] = ''Initializing ADC Test''; HAL_UART_Transmit(&huart3, init, sizeof init, 100);HAL_ADC_Start(&hadc3);
HAL_ADC_Start(&hadc2); HAL_ADCEx_MultiModeStart_DMA(&hadc1, (uint32_t *)g_val, 3); /* USER CODE END 2 *//* Infinite loop */
/* USER CODE BEGIN WHILE */ while (1) { snprintf(g_adcResult, sizeof g_adcResult, ''%04lu\n\r'', g_val[0]); HAL_UART_Transmit(&huart3, (uint8_t *)g_adcResult, sizeof g_adcResult, 100); snprintf(g_adcResult, sizeof g_adcResult, ''%04lu\n\r'', g_val[1]); HAL_UART_Transmit(&huart3, (uint8_t *)g_adcResult, sizeof g_adcResult, 100); snprintf(g_adcResult, sizeof g_adcResult, ''%04lu\n\r'', g_val[2]); HAL_UART_Transmit(&huart3, (uint8_t *)g_adcResult, sizeof g_adcResult, 100); HAL_Delay(100); /* USER CODE END WHILE *//* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */}
And these are the screenshots of the CubeMX (latest version) configs:
#stm32f7-nucleo #hal-adc-dma-triplemode #hal-adc #adc-configuration
