串口接收经纬度,stm32单片机代码
时间: 2023-08-24 15:05:05 浏览: 93
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:
```c
#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。
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