【STM32F769-discovery开发板】第九篇 网络通信

常见泽1

【STM32F769-discovery开发板】第九篇 网络通信 [复制链接]

 

这一篇主要测试下STM32F769的网络功能

下图可以看出STM32F769Nx带网络

但是STM32F769AX是不带网络的

DISO是带网络的

 

 

 

找找看，官方有测试程序

LWIP的SOCKET程序

 

找一下硬件电路图

 

网络芯片用的是LAN8742

之前板子用的比较多的应该是LAN8720和DP83848

 

DP83848支持MII和RMII模式，之前STM32F10X 评估板用的就是兼容性设计

但是LAN8720和LAN8742是支持RMII模式的

 

看网上的资料LAN8742应该是比8720多了一个WOL网络唤醒功能

 

DP83848和LAN8720 LAN8742的设备地址不一样，DP83848地址是0X01，LAN是0x00

 

这里面配置地址

 

int32_t LAN8742_Init(lan8742_Object_t *pObj)
 {
   uint32_t tickstart = 0, regvalue = 0, addr = 0;
   int32_t status = LAN8742_STATUS_OK;
   
   if(pObj->Is_Initialized == 0)
   {
     if(pObj->IO.Init != 0)
     {
       /* GPIO and Clocks initialization */
       pObj->IO.Init();
     }
   
     /* for later check */
     pObj->DevAddr = LAN8742_MAX_DEV_ADDR + 1;
   
     /* Get the device address from special mode register */  
     for(addr = 0; addr <= LAN8742_MAX_DEV_ADDR; addr ++)
     {
       if(pObj->IO.ReadReg(addr, LAN8742_SMR, ®value) < 0)
       { 
         status = LAN8742_STATUS_READ_ERROR;
         /* Can't read from this device address 
            continue with next address */
         continue;
       }
     
       if((regvalue & LAN8742_SMR_PHY_ADDR) == addr)
       {
         pObj->DevAddr = addr;
         status = LAN8742_STATUS_OK;
         break;
       }
     }
   
     if(pObj->DevAddr > LAN8742_MAX_DEV_ADDR)
     {
       status = LAN8742_STATUS_ADDRESS_ERROR;
     }
     

ETH 硬件IO口初始化函数

void HAL_ETH_MspInit(ETH_HandleTypeDef *heth)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  
  /* Enable GPIOs clocks */
  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOG_CLK_ENABLE();

/* Ethernet pins configuration ************************************************/
  /*
        RMII_REF_CLK ----------------------> PA1
        RMII_MDIO -------------------------> PA2
        RMII_MDC --------------------------> PC1
        RMII_MII_CRS_DV -------------------> PA7
        RMII_MII_RXD0 ---------------------> PC4
        RMII_MII_RXD1 ---------------------> PC5
        RMII_MII_TX_EN --------------------> PG11
        RMII_MII_TXD0 ---------------------> PG13
        RMII_MII_TXD1 ---------------------> PG14
  */

  /* Configure PA1, PA2 and PA7 */
  GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
  GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStructure.Pull = GPIO_NOPULL; 
  GPIO_InitStructure.Alternate = GPIO_AF11_ETH;
  GPIO_InitStructure.Pin = GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_7;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);
  
  /* Configure PC1, PC4 and PC5 */
  GPIO_InitStructure.Pin = GPIO_PIN_1 | GPIO_PIN_4 | GPIO_PIN_5;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* Configure PG11, PG13 and PG14 */
  GPIO_InitStructure.Pin =  GPIO_PIN_11 | GPIO_PIN_13 | GPIO_PIN_14;
  HAL_GPIO_Init(GPIOG, &GPIO_InitStructure);
  
  /* Enable the Ethernet global Interrupt */
  HAL_NVIC_SetPriority(ETH_IRQn, 0x7, 0);
  HAL_NVIC_EnableIRQ(ETH_IRQn);
  
  /* Enable ETHERNET clock  */
  __HAL_RCC_ETH_CLK_ENABLE();
}

 

下载程序

接上网线，开始识别网络

 

 

显示屏上显示IP地址位192.168.0.10

开始ping

 

 

 

Ping不通，肯定是电脑的IP不对

 

修改IP

 

 

继续ping,ping通了

 

测试了几十分钟很稳定