Can I transfer buffer generated HAL_DCMI_Start_DMA through UART interface. I am using STM32f4 discovery board. My UART stop working after HAL_DCMI_Start_DMA call. My main function is attached.
int main(void)
{
/* USER CODE BEGIN 1 */
OV9655_IDTypeDef OV9655ID;
/* USER CODE END 1 */
/* 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_DCMI_Init();
MX_I2C2_Init();
MX_UART4_Init();
/* USER CODE BEGIN 2 */
printf("Demo Start\r\n");
if(DCMI_OV9655_ReadID(&OV9655ID) == 0)
{
printf("OV9655 ID: 0x%x 0x%x 0x%x 0x%x\r\n", OV9655ID.Manufacturer_ID1, OV9655ID.Manufacturer_ID2, OV9655ID.PID, OV9655ID.Version);
}
else
{
printf("Read ID error\r\n");
}
printf("OV9655 Init: ");
if(DCMI_OV9655Config() == 0)
{
printf("OK\r\n");
}
else
{
printf("failed\r\n");
}
HAL_DCMI_Start_DMA(&hdcmi,DCMI_MODE_SNAPSHOT,camera_buffer,BUFFER_LEN);
HAL_Delay(500);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
HAL_UART_Transmit(&huart4,"SomeData",9,10); // Does not get transmitted
HAL_Delay(100);
}
/* USER CODE END 3 */
}
Would anyone please suggest
