帮我写一个stm32单片机的uart通讯程序
时间: 2023-03-15 10:55:40 浏览: 76
我可以提供一个简单的STM32 UART通讯程序的例子: #include "stm32f10x.h"
//定义UART的变量
USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
//定义发送与接收的缓冲区
uint8_t TxBuffer[BUFFERSIZE];
uint8_t RxBuffer[BUFFERSIZE];
//定义发送与接收中断标志
__IO uint8_t TxCount = 0;
__IO uint8_t RxCount = 0;
//UART初始化函数
void USART_Init(void)
{
//使能UART相关的GPIO复用功能
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
//配置USART TX和RX引脚
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
//使能USART1时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
//配置串口的参数
USART_InitStructure.USART_BaudRate = 115200;
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);
//使能串口中断
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
//使能UART
USART_Cmd(USART1, ENABLE);
}
//接收中断服务函数
void USART1_IRQHandler(void)
{
//如果接收到字符
if (USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
{
//读取接收到的字符
RxBuffer[RxCount++] = USART_ReceiveData(USART1);
//如果接收到的字符为回车字符
if (RxBuffer[RxCount - 1] == '\r')
{
//把缓冲区的最后一个字符改为空
RxBuffer[RxCount - 1] = '\0';
//清除接收计数器
RxCount = 0;
}
}
}
//发送数据函数
void USART_SendData(USART_TypeDef* USARTx, uint8_t *Data, uint8_t len)
{
uint8_t i;
//发送字符
for (i = 0; i < len; i++)
{
USART_SendData(USARTx, *Data++);
while (USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET)
{
}
}
}