stm32G431 串口通信例程hal库

请将以下代码复制到main.c的/* USER CODE BEGIN 0 */和/* USER CODE END 0 */之间。

uint8_t uart_rx_buf == 'a') { // 接收到数据'a'，回应"Hello"
        printf("Hello\r\n");
    }
    HAL_UART_Receive_IT(&huart1, uart_rx_buf, 1); // 设置串口中断缓冲区及中断阈值（当前为1）
}

// 重定向printf函数为串口输出
int fputc(int ch, FILE *p) {
    char c = ch;
    HAL_UART_Transmit(&huart1, (unsigned char *)&c, 1, 50);
    return ch;
}

// 发送单个数据
void UART1_SendByte(char c) {
    HAL_UART_Transmit(&huart1, (unsigned char *)&c, 1, 50);
}

// 发送整个数组
void UART1_SendData(char *p, int len) {
    HAL_UART_Transmit(&huart1, (unsigned char *)p, len, 50);
}

这段代码实现了在STM32G431上使用HAL库进行串口通信的例程。其中，通过`HAL_UART_RxCpltCallback`函数实现了串口接收数据的中断，当接收到数据为'a'时，回应"Hello"。通过重定向`fputc`函数，将`printf`函数的输出重定向到串口。`UART1_SendByte`函数用于发送单个数据，`UART1_SendData`函数用于发送整个数组。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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