单片机串行口通信设计代码
时间: 2023-11-02 22:05:21 浏览: 30
以下是一个基于STM32单片机的串口通信代码示例:
```c
#include "stm32f10x.h"
#include <stdio.h>
#define USART1_TX_GPIO GPIO_Pin_9
#define USART1_RX_GPIO GPIO_Pin_10
#define USART1_GPIO GPIOA
#define USART1 USART1
void USART_Configuration(void)
{
USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable GPIO clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
/* Enable USART clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
/* Configure USART1 Tx (PA.09) as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = USART1_TX_GPIO;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(USART1_GPIO, &GPIO_InitStructure);
/* Configure USART1 Rx (PA.10) as input floating */
GPIO_InitStructure.GPIO_Pin = USART1_RX_GPIO;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(USART1_GPIO, &GPIO_InitStructure);
/* USART1 configuration */
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
/* Enable USART1 */
USART_Cmd(USART1, ENABLE);
}
int main(void)
{
char buffer[50];
USART_Configuration();
while (1)
{
/* Check if receive register is not empty */
if (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) != RESET)
{
/* Read received character */
char received_char = USART_ReceiveData(USART1);
/* Print received character */
sprintf(buffer, "Received character: %c\r\n", received_char);
printf(buffer);
}
}
}
```
这个示例代码使用了STM32F10x系列单片机的USART1模块进行串口通信。首先,需要通过GPIO初始化函数将USART1的TX和RX引脚配置为正确的模式。然后,使用USART_Init函数配置USART1的波特率、数据位数、停止位数等参数。最后,通过调用USART_Cmd函数使能USART1模块。
在主循环中,代码不断检查USART1的接收寄存器是否为空,如果不为空,则读取接收到的字符,并使用printf函数将其打印到终端上。