stm32f103c8t6与esp8266通信
时间: 2024-04-30 22:16:01 浏览: 219
STM32F103C8T6是一款常用的ARM Cortex-M3微控制器,ESP8266是一款常用的Wi-Fi模块。它们可以通过串口进行通信,以下是简单的介绍:
首先,需要在STM32F103C8T6上配置一个USART外设,将其连接到ESP8266的串口上。然后,使用STM32F103C8T6的固件库或者裸机编程方式,发送AT指令给ESP8266,实现Wi-Fi模块的初始化、连接和数据传输等操作。
以下是一个简单的示例代码:
```
#include "stm32f10x.h"
#include <stdio.h>
#include <string.h>
void USART1_Init(void) {
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
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);
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);
USART_Cmd(USART1, ENABLE);
}
void USART1_SendString(char* str) {
while(*str) {
while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
USART_SendData(USART1, *str++);
}
}
int main(void) {
char buf[128];
USART1_Init();
// 发送AT指令
USART1_SendString("AT\r\n");
// 等待ESP8266响应
while(1) {
memset(buf, 0, sizeof(buf));
int i = 0;
while(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);
buf[i++] = (char)USART_ReceiveData(USART1);
if(strstr(buf, "OK\r\n") != NULL) {
break;
}
}
// 连接Wi-Fi网络
USART1_SendString("AT+CWJAP=\"ssid\",\"password\"\r\n");
// 等待ESP8266响应
while(1) {
memset(buf, 0, sizeof(buf));
int i = 0;
while(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);
buf[i++] = (char)USART_ReceiveData(USART1);
if(strstr(buf, "OK\r\n") != NULL) {
break;
}
}
// 发送数据
USART1_SendString("AT+CIPSEND=10\r\n");
USART1_SendString("1234567890");
// 断开Wi-Fi连接
USART1_SendString("AT+CWQAP\r\n");
while(1);
}
```
相关问题:
1. 怎么在STM32F103C8T6上配置一个USART外设?
2. ESP8266模块有哪些常用的AT指令?
3. 如何处理ESP8266的响应结果?
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