【STM32F769-discovery开发板】第九篇网络通信

常见泽1 发表于 2023-10-29 09:55

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

 

<pre>
<code class="language-cpp">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, &regvalue) < 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;
}

</code></pre>

ETH 硬件IO口初始化函数

<pre>
<code class="language-cpp">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();
}
</code></pre>

 

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

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【STM32F769-discovery开发板】第九篇 网络通信

【STM32F769-discovery开发板】第九篇网络通信