STM32 HAL库串口不定长数据

最新推荐文章于 2025-04-03 22:17:53 发布

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最新推荐文章于 2025-04-03 22:17:53 发布

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分类专栏： # STM32HAL库 STM32 文章标签： stm32 串口通信

本文链接：https://blog.youkuaiyun.com/conjurer_yft/article/details/109253516

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该代码段展示了如何在STM32中为多个串口（USART1, USART2, USART3）设置中断回调函数，用于接收数据。当接收到回车字符（0x0d）或缓冲区满（超过30个字符）时，会清空缓冲区，并重新启动接收中断。此功能有助于实时处理串口通信的数据。

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添加中断回调函数

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
		
	if(huart->Instance == USART3)	// 判断是由哪个串口触发的中断
	{
		
		
		if(ulart3_counts == 0)
		{
				uart_data_caler(3);
		}
		ulart3_read_bufs[ulart3_counts++] = read_ulart3;
		if(read_ulart3 == 0x0d)
		{
			ulart3_counts = 0;
		}
		if(ulart3_counts>30)
		{
			ulart3_counts = 0;
		}
		HAL_UART_Receive_IT(&huart3,&read_ulart3,1);		// 重新使能串口1接收中断
		
	}
	if(huart->Instance == USART2)	// 判断是由哪个串口触发的中断
	{
		
		
		if(ulart2_counts == 0)
		{
				uart_data_caler(2);
		}
		ulart2_read_bufs[ulart2_counts++] = read_ulart2;
		if(read_ulart2 == 0x0d)
		{
			ulart2_counts = 0;
		}
		if(ulart2_counts>30)
		{
			ulart2_counts = 0;
		}
		HAL_UART_Receive_IT(&huart2,&read_ulart2,1);		// 重新使能串口1接收中断
		
	}
	if(huart->Instance == USART1)	// 判断是由哪个串口触发的中断
	{
		
		
		if(ulart1_counts == 0)
		{
				uart_data_caler(1);
		}
		ulart1_read_bufs[ulart1_counts++] = read_ulart1;
		if(read_ulart1 == 0x0d)
		{
			ulart1_counts = 0;
		}
		if(ulart1_counts>30)
		{
			ulart1_counts = 0;
		}
		HAL_UART_Receive_IT(&huart1,&read_ulart1,1);		// 重新使能串口1接收中断
		
	}

}
void uart_data_caler(char i)
{
	if(i ==1)
	{
			memset(ulart1_read_bufs, 0, sizeof(ulart1_read_bufs));
			ulart1_counts = 0;
	}
	else if(i==2)
	{
			memset(ulart2_read_bufs, 0, sizeof(ulart2_read_bufs));
			ulart2_counts = 0;
	}
	else if(i==3)
	{
			memset(ulart3_read_bufs, 0, sizeof(ulart3_read_bufs));
			ulart3_counts = 0;
	}
}

使能中断接收

	HAL_UART_Receive_IT(&huart3,&read_ulart3,1);	
	HAL_UART_Receive_IT(&huart1,&read_ulart1,1);
	HAL_UART_Receive_IT(&huart2,&read_ulart2,1);