stm32f103c8t6加esp8266进行串口通信

首先，需要连接STM32F103C8T6和ESP8266的串口通信引脚。STM32F103C8T6的USART1_TX和USART1_RX引脚需要连接ESP8266的TX和RX引脚，以便进行串口通信。

然后，需要在STM32F103C8T6上配置USART1串口，并使用HAL库进行编程。以下是一个简单的示例代码，演示如何在STM32F103C8T6和ESP8266之间进行串口通信：

#include "stm32f1xx_hal.h"

UART_HandleTypeDef huart1;

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART1_UART_Init(void);

int main(void)
{
  HAL_Init();
  SystemClock_Config();
  MX_GPIO_Init();
  MX_USART1_UART_Init();

  uint8_t buffer[50];
  uint8_t response[50];
  int i = 0;

  while (1)
  {
    sprintf(buffer, "AT\r\n"); //发送AT指令
    HAL_UART_Transmit(&huart1, buffer, strlen(buffer), HAL_MAX_DELAY);

    HAL_Delay(1000); //等待ESP8266的响应

    i = 0;
    while (HAL_UART_Receive(&huart1, &response[i], 1, HAL_MAX_DELAY) == HAL_OK) //接收ESP8266的响应
    {
      if (response[i] == '\n') //如果检测到换行符，则说明响应已经结束
      {
        response[i + 1] = '\0'; //在响应的最后添加一个空字符，以便进行字符串操作
        break;
      }
      i++;
    }

    //处理ESP8266的响应
    if (strstr(response, "OK") != NULL)
    {
      //ESP8266已经响应了AT指令
    }
    else if (strstr(response, "ERROR") != NULL)
    {
      //ESP8266未能正确响应AT指令
    }

    HAL_Delay(1000);
  }
}

void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct;
  RCC_ClkInitTypeDef RCC_ClkInitStruct;

  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
      | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
}

static void MX_USART1_UART_Init(void)
{
  huart1.Instance = USART1;
  huart1.Init.BaudRate = 115200;
  huart1.Init.WordLength = UART_WORDLENGTH_8B;
  huart1.Init.StopBits = UART_STOPBITS_1;
  huart1.Init.Parity = UART_PARITY_NONE;
  huart1.Init.Mode = UART_MODE_TX_RX;
  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart1) != HAL_OK)
  {
    Error_Handler();
  }
}

static void MX_GPIO_Init(void)
{
  __HAL_RCC_GPIOA_CLK_ENABLE();

  GPIO_InitTypeDef GPIO_InitStruct;

  GPIO_InitStruct.Pin = GPIO_PIN_9;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  GPIO_InitStruct.Pin = GPIO_PIN_10;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}

void Error_Handler(void)
{
  while (1)
  {
  }
}

此代码将向ESP8266发送AT指令，并等待其响应。一旦收到响应，它将对响应进行处理，并根据响应执行相应的操作。

这只是一个简单的示例，您可以根据需要进行修改和扩展。