[网络协议]基于RT Thread的ETH应用(一)

基于RTT的ETH应用（一）

实现目的：通过ETH实现互联网访问

1.CubeMX配置相关参数

1.1配置时钟参数

1.2配置ETH

本文采用正点原子F4探索者，故相关配置引脚不能使用cubemx默认，根据原理图进行配置

1.3 Rt thread Studio设置

1.3.1进入board.h查看说明

/** if you want to use eth you can use the following instructions.
 *
 * STEP 1, define macro related to the eth
 *                 such as    BSP_USING_ETH
 *
 * STEP 2, copy your eth init function from stm32xxxx_hal_msp.c generated by stm32cubemx to the end if board.c file
 *                 such as     void HAL_ETH_MspInit(ETH_HandleTypeDef* heth)
 *
 * STEP 3, modify your stm32xxxx_hal_config.h file to support eth peripherals. define macro related to the peripherals
 *                 such as     #define HAL_ETH_MODULE_ENABLED
 *
 * STEP 4, config your phy type
 *                 such as     #define PHY_USING_LAN8720A
 *                             #define PHY_USING_DM9161CEP
 *                             #define PHY_USING_DP83848C
 * STEP 5, implement your phy reset function in the end of board.c file
 *                 void phy_reset(void)
 *
 * STEP 6, config your lwip or other network stack
 *
 */

那就跟着步骤来吧

1.3.2在board.c 加入Cubemx生成的代码

void HAL_ETH_MspInit(ETH_HandleTypeDef* ethHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(ethHandle->Instance==ETH)
  {
  /* USER CODE BEGIN ETH_MspInit 0 */

  /* USER CODE END ETH_MspInit 0 */
    /* ETH clock enable */
    __HAL_RCC_ETH_CLK_ENABLE();

    __HAL_RCC_GPIOC_CLK_ENABLE();
    __HAL_RCC_GPIOA_CLK_ENABLE();
    __HAL_RCC_GPIOG_CLK_ENABLE();
    /**ETH GPIO Configuration
    PC1     ------> ETH_MDC
    PA1     ------> ETH_REF_CLK
    PA2     ------> ETH_MDIO
    PA7     ------> ETH_CRS_DV
    PC4     ------> ETH_RXD0
    PC5     ------> ETH_RXD1
    PG11     ------> ETH_TX_EN
    PG13     ------> ETH_TXD0
    PG14     ------> ETH_TXD1
    */
    GPIO_InitStruct.Pin = GPIO_PIN_1|GPIO_PIN_4|GPIO_PIN_5;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

    GPIO_InitStruct.Pin = GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_7;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    GPIO_InitStruct.Pin = GPIO_PIN_11|GPIO_PIN_13|GPIO_PIN_14;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
    HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);

  /* USER CODE BEGIN ETH_MspInit 1 */

  /* USER CODE END ETH_MspInit 1 */
  }
}


#define RESET_IO GET_PIN(D, 3)
void phy_reset(void)
{
   rt_pin_mode(RESET_IO, PIN_MODE_OUTPUT);
   rt_pin_write(RESET_IO, PIN_HIGH);
   rt_thread_mdelay(50);
   rt_pin_write(RESET_IO, PIN_LOW);
   rt_thread_mdelay(50);
   rt_pin_write(RESET_IO, PIN_HIGH);
}

每走一步记得编译，在这里编译会出现HAL错误，不用担心，继续往下做

1.3.3 Hal_Config配置

在stm32f4xx_hal_conf.h中取消对ETH的注释。
继续编译，出现netif相关的报错，终于要好了

1.3.4 rt thread settings设置

在网络/轻量级TCP/IP堆栈中 开启lwip堆栈的使能

关闭DHCP分配地址，手动设置ipv4地址

再次编译后所有错误已经消失，接下来，继续设置才能保证绿色上网

1.4 测试

在MSH中输入ifconfig成功答应出IP地址

看看能不能ping通百度

1.5 TCP Client测试

虽然这不是我们的最后目标
在rt thread中的文档中copy下tcp客户端的代码

void tcpclient(int argc, char **argv)
{
    int ret;
    char *recv_data;
    struct hostent *host;
    int sock, bytes_received;
    struct sockaddr_in server_addr;
    const char *url;
    int port;

    /* 接收到的参数小于 3 个 */
    if (argc < 3)
    {
        rt_kprintf("Usage: tcpclient URL PORT\n");
        rt_kprintf("Like: tcpclient 192.168.12.44 5000\n");
        return ;
    }

    url = argv[1];
    port = strtoul(argv[2], 0, 10);

    /* 通过函数入口参数 url 获得 host 地址（如果是域名，会做域名解析） */
    host = gethostbyname(url);



    /* 创建一个 socket，类型是 SOCKET_STREAM，TCP 类型 */
    if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1)
    {
        /* 创建 socket 失败 */
        rt_kprintf("Socket error\n");

        /* 释放接收缓冲 */
        rt_free(recv_data);
        return;
    }

    /* 初始化预连接的服务端地址 */
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(port);
    server_addr.sin_addr = *((struct in_addr *)host->h_addr);
    rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero));

    /* 连接到服务端 */
    if (connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1)
    {
        /* 连接失败 */
        rt_kprintf("Connect fail!\n");
        closesocket(sock);
        return;
    }


    return;
}

MSH_CMD_EXPORT(tcpclient, dac voltage convert sample);

编译报错的添加如下头文件

#include <sys/socket.h>
#include <netdb.h>

测试结果如下：

也可以找下网络上公开的TCP服务器测试一下

下期我们继续实现MQTT连接，最终完成的项目是一个低功耗的采集节点
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