STM32F103固件库在建立tcp客户端的数据接收回调函数中调用ringbuffer示例代码

以下是一个示例代码，该代码演示了如何在STM32F103固件库中建立TCP客户端，并在数据接收回调函数中使用RingBuffer来存储接收到的数据：

#include "stm32f10x.h"
#include "lwip/tcp.h"
#include "lwip/memp.h"
#include "lwip/sys.h"
#include "ringbuffer.h"

#define BUFFER_SIZE 1024

RingBuffer rx_buffer;

void tcp_client_recv_callback(void *arg, struct tcp_pcb *tpcb, struct pbuf *p, err_t err)
{
  if (p != NULL) {
    RingBuffer_Write(&rx_buffer, (uint8_t *)p->payload, p->len);
    tcp_recved(tpcb, p->len);
    pbuf_free(p);
  } else if (err == ERR_OK) {
    tcp_close(tpcb);
  }
}

void tcp_client_connect_callback(void *arg, struct tcp_pcb *tpcb, err_t err)
{
  if (err == ERR_OK) {
    tcp_recv(tpcb, tcp_client_recv_callback);
  } else {
    tcp_close(tpcb);
  }
}

void tcp_client_connect(const char *host, uint16_t port)
{
  struct tcp_pcb *pcb;
  err_t err;

  pcb = tcp_new();
  if (pcb != NULL) {
    err = tcp_connect(pcb, IP_ADDR_ANY, port, tcp_client_connect_callback);
    if (err == ERR_OK) {
      /* Wait for connection to be established */
      while (!tcp_connected(pcb)) {
        sys_msleep(10);
      }

      /* Send data to server */
      const char *data = "Hello, server!";
      tcp_write(pcb, data, strlen(data), 1);
    } else {
      tcp_close(pcb);
    }
  }
}

int main()
{
  uint8_t buffer[BUFFER_SIZE];

  /* Initialize RingBuffer */
  RingBuffer_Init(&rx_buffer, buffer, BUFFER_SIZE);

  /* Initialize lwIP stack */
  lwip_init();

  /* Connect to TCP server */
  tcp_client_connect("192.168.1.100", 1234);

  while (1) {
    /* Process received data */
    uint8_t data;
    while (RingBuffer_Read(&rx_buffer, &data, 1)) {
      /* Handle received data */
    }

    /* Do other tasks */
  }
}

在上面的示例代码中，我们使用了RingBuffer来存储接收到的数据。在数据接收回调函数中，我们通过调用RingBuffer的API将接收到的数据存储到RingBuffer中。在主循环中，我们通过调用RingBuffer的API来读取RingBuffer中的数据，并处理接收到的数据。