c语言编写stm32串口
时间: 2023-05-25 17:04:27 浏览: 173
以下是C语言编写stm32串口的示例代码:
```c
#include "stm32f10x.h"
#define UART_BAUDRATE 9600
#define UART_TX_PIN GPIO_Pin_9
#define UART_RX_PIN GPIO_Pin_10
void USART1_Init(void)
{
// Enable USART1 and GPIOD clocks
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
// Configure USART1 pins
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin = UART_TX_PIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Pin = UART_RX_PIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// Configure USART1 settings
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = UART_BAUDRATE;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_Init(USART1, &USART_InitStructure);
// Enable USART1
USART_Cmd(USART1, ENABLE);
}
void USART1_SendChar(uint8_t ch)
{
while (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
USART_SendData(USART1, ch);
}
uint8_t USART1_ReceiveChar(void)
{
while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);
return USART_ReceiveData(USART1);
}
```
该示例代码用于初始化USART1串口,并提供发送和接收字符的函数。在初始化函数中,首先启用USART1和GPIOA的时钟,并设置USART1的GPIO引脚为复用推挽输出和浮空输入。然后,要设置串口的基本配置如波特率、数据位、停止位等。最后,打开串口使能开关以启用串口通信。在发送和接收函数中,使用相应的USART的API函数实现发送和接收操作。该示例代码适用于使用USART1端口的STM32微控制器。
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