HAL_UART_Transmit_IT();

HAL_UART_Transmit_IT()是一个函数，用于通过UART（通用异步收发传输）发送数据。该函数的原型如下：HAL_StatusTypeDef HAL_UART_Transmit_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)。在使用该函数之前，需要先开启中断并配置UART接收数据的DMA（直接内存访问）功能。HAL_UART_Receive_DMA()函数用于开启中断和配置DMA接收。__HAL_UART_ENABLE_IT()函数用于使能UART的空闲中断。然后，在UART的总中断处理函数中（例如HAL_UART_IRQHandler()），通过判断USART_SR寄存器中的标志位来确定是否可以发送数据。如果USART_SR寄存器的TXE位（发送缓冲区为空）和CR1寄存器的TXEIE位（发送缓冲区为空中断使能）都为1，则调用USART_Transmit_IT()函数发送数据。如果USART_SR寄存器的TC位（发送完成）和CR1寄存器的TCIE位（发送完成中断使能）都为1，则调用USART_EndTransmit_IT()函数结束发送。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* [基于HAL库的串口通信](https://blog.csdn.net/soul__master/article/details/127245348)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 50%"]
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