STM32 problem collection

KeilDownloader crashes

删除当前目录下的.uvoptx后缀文件,Just reconfigure the magic wand

HALThe library serial port interrupt is not called

STM32采用HAL库HAL_UART_Receive_IT（）只调用一次,The first thing to do is to enable global interrupts,Then make sure to call it after the serial port initialization is completeHAL_UART_Receive_IT（）确定返回HAL_OK,Then add it to the receive interrupt callback function,And make sure the received byte length is 1,因为采用HAL库,Receive serial port in interrupt mode,只有当RxXferCount == 0 时,也就是调用这个函数,When receiving the specified amount of data size is complete,才会调用回调函数HAL_UART_RxCpltCallback（）.所以紧接着,In the serial port interrupt service function,又调用了一次,继续接收,This will not cause the specified data frame length to be received and will not enter the interrupt.

uint8_t uart1_rxbuf[10]; 
uint8_t uart2_rxbuf[10]; 
if(HAL_UART_Receive_IT(&huart1, uart1_rxbuf, 1)==HAL_OK)
{
    
	HAL_UART_Transmit(&huart1, (uint8_t *)"ok", 2,0xffff);
}
if(HAL_UART_Receive_IT(&huart2, uart2_rxbuf, 1)==HAL_OK)
{
    
	HAL_UART_Transmit(&huart2, (uint8_t *)"ok", 2,0xffff);
}

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
    
  if(huart->Instance == USART1)
	{
    
		HAL_UART_Transmit(&huart2, uart1_rxbuf, 1,0xffff);      // 把收到的字节原样发送出去
		HAL_UART_Receive_IT(&huart1, uart1_rxbuf, 1);       // 重新注册一次,Otherwise, you won't receive it next time
	}
	if(huart->Instance == USART2)
	{
    
		HAL_UART_Transmit(&huart1, uart2_rxbuf, 1,0xffff);
		HAL_UART_Receive_IT(&huart2, uart2_rxbuf, 1);
	}
}