STM32 HAL rx中断无法正确获取字节(STM32 HAL rx interrupt can't get bytes correctly)

STM32 HAL rx中断无法正确获取字节(STM32 HAL rx interrupt can't get bytes correctly)

嗨伙计们，我正在尝试使用stm32 HAL库进行串行rx中断，我得到了我不知道的错误。

这是非常简单的程序。 PC为stm32板提供字节，stm32将使用rx中断例程获取这些字节。

问题是当我发送超过4个字节，例如“12345”时，stm32板只有4个字节，最后一个字节（5）在某个地方消失了。 这是为了更好地理解的图片。

这是我在HAL_UART_RxCpltCallback例程中的代码：

HAL_UART_Transmit(&huart4, &receive1, 1, 1000); HAL_UART_Receive_IT(&huart4, &receive1, 1);

如果您有任何想法，请评论:)

Hi guys I am trying to make serial rx interrupt using stm32 HAL library and I got error what I dont know.

It is really simple program. PC gives bytes to stm32 board and stm32 will take those bytes using rx interrupt routine.

Problem is when i send over 4 bytes ,such as "12345", stm32 board only got 4 bytes and last one byte(5) is gone somewhere. Here is picture for better understanding.

Here is my code in HAL_UART_RxCpltCallback routine:

HAL_UART_Transmit(&huart4, &receive1, 1, 1000); HAL_UART_Receive_IT(&huart4, &receive1, 1);

If you have any idea, please comment :)

最满意答案

检查函数： HAL_UART_Receive_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size) ;

例如，制作一个足够长的大小，如16bytes;

将HAL_UART_RxCpltCallback例程调用到函数HAL_UART_Receive_IT(...) 。 我建议你添加这样的结束字符（ \n ）检测：

if ( (*huart->pRxBuffPtr) == '\n') { HAL_UART_RxCpltCallback(huart); //-------------------------------------------///////// } else { huart->pRxBuffPtr++; }

check the function: HAL_UART_Receive_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size);

make a size enough longer like 16bytes for example;

call your HAL_UART_RxCpltCallback routine into the function HAL_UART_Receive_IT(...). I suggest to you to add an end character (\n) detection like this:

if ( (*huart->pRxBuffPtr) == '\n') { HAL_UART_RxCpltCallback(huart); //-------------------------------------------///////// } else { huart->pRxBuffPtr++; }