串口接收经纬度，stm32单片机代码

以下是一个简单的示例代码，使用USART2接收经纬度数据，并将其解析存储到变量中：

#include "stm32f4xx.h"
#include <string.h>

#define BUFFER_SIZE 100

char buffer[BUFFER_SIZE];
int buffer_index = 0;
char lat[15];
char lon[15];

void USART2_IRQHandler(void) {
    if (USART_GetITStatus(USART2, USART_IT_RXNE) != RESET) {
        char data = USART_ReceiveData(USART2);
        if (data == '\n') {
            buffer[buffer_index] = '\0';
            char* ptr = strtok(buffer, ",");
            strcpy(lat, ptr);
            ptr = strtok(NULL, ",");
            strcpy(lon, ptr);
            buffer_index = 0;
        } else {
            buffer[buffer_index++] = data;
        }
    }
}

int main(void) {
    // 初始化USART2
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_USART2);
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_USART2);
    GPIO_InitTypeDef GPIO_InitStruct;
    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStruct.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3;
    GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(GPIOA, &GPIO_InitStruct);
    USART_InitTypeDef USART_InitStruct;
    USART_InitStruct.USART_BaudRate = 9600;
    USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStruct.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
    USART_InitStruct.USART_Parity = USART_Parity_No;
    USART_InitStruct.USART_StopBits = USART_StopBits_1;
    USART_InitStruct.USART_WordLength = USART_WordLength_8b;
    USART_Init(USART2, &USART_InitStruct);
    USART_Cmd(USART2, ENABLE);
    USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
    NVIC_InitTypeDef NVIC_InitStruct;
    NVIC_InitStruct.NVIC_IRQChannel = USART2_IRQn;
    NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
    NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0;
    NVIC_Init(&NVIC_InitStruct);

    while (1) {
        // 程序运行主体部分
    }
}

在这个示例中，我们使用了UART2作为串口接收器，将接收到的数据存储在一个大小为100的缓冲区中。当接收到换行符时，我们使用strtok函数解析缓冲区中的数据，并将其存储在lat和lon数组中。你需要根据实际情况修改缓冲区大小和数组大小。