stm32接收esp8266的数据代码

下面是一个简单的例子，演示了如何在STM32上使用UART接收ESP8266发送的数据：

#include "stm32f10x.h"
#include <string.h>

#define BUFFER_SIZE 1024

uint8_t rx_buffer[BUFFER_SIZE];
uint16_t rx_index = 0;

void USART1_IRQHandler(void)
{
  if (USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
  {
    rx_buffer[rx_index] = USART_ReceiveData(USART1);

    if (rx_index < BUFFER_SIZE - 1)
    {
      rx_index++;
    }
    else
    {
      rx_index = 0;
    }
  }
}

int main(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  USART_InitTypeDef USART_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;

  // Enable GPIOA and USART1 clocks
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_USART1, ENABLE);

  // Configure PA9 (USART1_TX) as alternate function push-pull
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  // Configure PA10 (USART1_RX) as input floating
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  // Configure 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(USART1, &USART_InitStructure);

  // Enable USART1 interrupts
  USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

  // Enable USART1
  USART_Cmd(USART1, ENABLE);

  while (1)
  {
    // Check if there is new data in the buffer
    if (rx_index > 0)
    {
      // Process the received data
      // ...

      // Clear the buffer
      memset(rx_buffer, 0, BUFFER_SIZE);
      rx_index = 0;
    }
  }
}

在这个例子中，我们使用USART1和PA9 / PA10配置了STM32的UART，将其设置为接收模式，并启用了接收中断。当ESP8266发送数据时，它将被存储在rx_buffer数组中，并且可以在中断处理程序中进一步处理。注意，我们在处理接收数据后清空了rx_buffer和rx_index变量，以准备接收下一批数据。