写一个stm32与esp8266连接的代码

你好，我可以回答这个问题。以下是一个简单的stm32与esp8266连接的代码示例：

#include "stm32f10x.h"
#include "stm32f10x_usart.h"

#define ESP8266_USART USART1

void ESP8266_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;

// 使能 USART1 时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);

// 配置 USART1 引脚
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);

// 配置 USART1
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(ESP8266_USART, &USART_InitStructure);

// 使能 USART1
USART_Cmd(ESP8266_USART, ENABLE);
}

void ESP8266_SendData(uint8_t *data, uint16_t len)
{
while (len--)
{
USART_SendData(ESP8266_USART, *data++);
while (USART_GetFlagStatus(ESP8266_USART, USART_FLAG_TXE) == RESET);
}
}

int main(void)
{
ESP8266_Init();

// 发送 AT 命令
ESP8266_SendData("AT\r\n", 4);

while (1);

return ;
}