STM32串口读取数据示例—CSDN独家

接线

GPS

• V（VCC）插在 STM32 3.3V引脚
• G（GND）插在 STM32 G（DNG）引脚
• R（RX）空
• T（TX）空

注意现在先不要插GPS R（RX） T（TX）引脚

TTL

• TTL RX 插在 STM32 A9 引脚
• TTL TX 插在 STM32 A10 引脚

代码示例

#include "stm32f10x.h"
#include "stdio.h"
#include "string.h"

#define BAUDRATE 38400
#define UART1_RX_PIN GPIO_Pin_10
#define UART1_TX_PIN GPIO_Pin_9

void USART1_Init(void);
void USART1_PrintChar(uint8_t ch);
void USART1_PrintString(const char *str);

void USART1_IRQHandler(void)
{

    if (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == SET)
    {
        // 读取接收到的数据
        uint8_t data = USART_ReceiveData(USART1);

        // 打印数据到串口
        USART1_PrintString("ABCD:");
        USART1_PrintChar(data);
    }
}

int main(void)
{
    // 初始化USART1
    USART1_Init();
    while (1)
    {
    }
}

void USART1_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);

    GPIO_InitStructure.GPIO_Pin = UART1_TX_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = UART1_RX_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    USART_InitStructure.USART_BaudRate = BAUDRATE;
    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);

    USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);

    NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    USART_Cmd(USART1, ENABLE);
}

void USART1_PrintChar(uint8_t ch)
{
    USART_SendData(USART1, ch);
    while (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET)
    {
    }
}

void USART1_PrintString(const char *str)
{
    while (*str)
    {
        USART1_PrintChar(*str++);
    }
}

• 将上面的代码编程到STM32板子上打开串口工具选择38400波特率
• 将GPS的T（TX）插到A10引脚
• 将GPS的R（RX）插到A9引脚
• 打开串口，按一下STM32板子上的按钮即可