Posted on November 11, 2015 at 10:45
Hello,
I set up a uart project from CubeMx for STM32F0308 Disco,
Basically I want to send ''test'' strings every 3 seconds via DMA however after I only get a single ''test'' in terminal. HAL_UART_TxCpltCallback function is never called.
void HAL_UART_TxCpltCallback(UART_HandleTypeDef *UartHandle)
{
/* Set transmission flag: transfer complete */
if(UartHandle->Instance == USART1){
HAL_GPIO_WritePin(GPIOC, LD4_Pin, GPIO_PIN_SET);
UartTXReady = SET;
}
}
int main(void)
{
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* Configure the system clock */
SystemClock_Config();
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_DMA_Init();
MX_USART1_UART_Init();
while (1)
{
if(HAL_UART_Transmit_DMA(&huart1, (uint8_t *)''testing\n'', 5) != HAL_OK)
{
HAL_GPIO_WritePin(GPIOC, LD4_Pin, GPIO_PIN_SET);
Error_Handler();
}
while (UartTXReady != SET) { // do nothing }
HAL_Delay(3000);
}
CubeMx didn't provide any TXCpltCallback function so I had to add it myself. If I set the TX_DMA mode to Circular mode then I get a flood of ''testing'' strings as expected but
I want t run it in Normal DMA mode and when it's like that, I only get a single ''testing'' in terminal
any clues?
