用hal库写一个esp8266驱动代码

以下是使用HAL库编写ESP8266驱动程序的示例代码：

#include "stm32f1xx_hal.h"

UART_HandleTypeDef huart2;

void MX_USART2_UART_Init(void)
{
  huart2.Instance = USART2;
  huart2.Init.BaudRate = 115200;
  huart2.Init.WordLength = UART_WORDLENGTH_8B;
  huart2.Init.StopBits = UART_STOPBITS_1;
  huart2.Init.Parity = UART_PARITY_NONE;
  huart2.Init.Mode = UART_MODE_TX_RX;
  huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart2.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart2) != HAL_OK)
  {
    Error_Handler();
  }
}

void ESP8266_Init(void)
{
  char* AT_Command = "AT\r\n";
  char* Expected_Response = "OK";
  char Response[10] = {0};
  HAL_UART_Transmit(&huart2, (uint8_t*)AT_Command, strlen(AT_Command), HAL_MAX_DELAY);
  HAL_UART_Receive(&huart2, (uint8_t*)Response, strlen(Expected_Response), HAL_MAX_DELAY);
  if (strcmp(Response, Expected_Response) != 0)
  {
    Error_Handler();
  }
}

void ESP8266_SendData(char* Data)
{
  char* AT_Command = "AT+CIPSEND=13\r\n";
  char* Expected_Response = ">";
  char Response[10] = {0};
  HAL_UART_Transmit(&huart2, (uint8_t*)AT_Command, strlen(AT_Command), HAL_MAX_DELAY);
  HAL_UART_Receive(&huart2, (uint8_t*)Response, strlen(Expected_Response), HAL_MAX_DELAY);
  if (strcmp(Response, Expected_Response) != 0)
  {
    Error_Handler();
  }
  HAL_UART_Transmit(&huart2, (uint8_t*)Data, strlen(Data), HAL_MAX_DELAY);
}

int main(void)
{
  HAL_Init();
  MX_USART2_UART_Init();
  ESP8266_Init();
  ESP8266_SendData("Hello World!");
  while (1)
  {

  }
}

在此示例代码中，使用了HAL库的UART初始化函数和发送/接收函数。ESP8266_Init函数用于初始化ESP8266模块并检查其是否正常工作，ESP8266_SendData函数用于发送数据。在main函数中，首先调用了HAL_Init和MX_USART2_UART_Init函数进行初始化，然后调用ESP8266_Init函数对ESP8266模块进行初始化，最后调用ESP8266_SendData函数发送数据。