STM32H750网卡驱动问题

发布于 2021-12-16 18:17:01 浏览：2315 订阅该版

编译环境：RT-THREAD Studio
系统版本：rt thread 4.0.3
LWiP版本：2.0.2
硬件环境：野火STM32H750开发板
PHY:LAN8720A
根据RTT Studio ART-PI开发板生成模板工程，添加网卡驱动，添加LWIP如下图
![image.png](https://oss-club.rt-thread.org/uploads/20211216/c6db7dab119df62f3b1d86cc56de06ba.png.webp)
![image.png](https://oss-club.rt-thread.org/uploads/20211216/6f19b5b589f30905e06d9756096dfd5f.png)
由于野火的开发板没有接硬件复位，采用软件复位，所以在程序里面屏蔽了这个引脚的初始化。一切准备就绪，修改LAN8720A硬件驱动，适配野火开发板。烧录程序开始测试：
![image.png](https://oss-club.rt-thread.org/uploads/20211216/c66b9ab4e59fa64e8063c47a6f1e127c.png)
一切运行正常，好消息。
开始双端ping测试，电脑ping开发板：
![image.png](https://oss-club.rt-thread.org/uploads/20211216/0546e5e534b9288e9d0e4db48e171ed7.png)
没丢包现象。好消息ping通了。再测试开发板ping电脑：
![image.png](https://oss-club.rt-thread.org/uploads/20211216/0f9c1b61d4f8491cfc70fc421989ec08.png)
也没问题，准备收拾东西去吃饭。等会来再写应用程序。。。。此处省略******
回来看到开发板出问题了，就知道没这么简单。
只见串口显示 ：
```
[D/drv.emac] phy basic status reg is 0x7809
[I/drv.emac] link down
[D/drv.emac] phy basic status reg is 0x7809
[D/drv.emac] phy basic status reg is 0x7809
[D/drv.emac] phy basic status reg is 0x7809
[D/drv.emac] phy basic status reg is 0x7809
[D/drv.emac] phy basic status reg is 0x7809
[D/drv.emac] phy basic status reg is 0x7809
[D/drv.emac] phy basic status reg is 0x7809
[D/drv.emac] phy basic status reg is 0x7809
[D/drv.emac] phy basic status reg is 0x7809
[D/drv.emac] phy basic status reg is 0x7809
[D/drv.emac] phy basic status reg is 0x7809
[D/drv.emac] phy basic status reg is 0x7809
[D/drv.emac] phy basic status reg is 0x7809
[D/drv.emac] phy basic status reg is 0x7809
[D/drv.emac] phy basic status reg is 0x780D
[D/drv.emac] phy control status reg is 0x44
[D/drv.emac] link up
[D/drv.emac] 10Mbps
[D/drv.emac] half-duplex
[D/drv.emac] phy basic status reg is 0x780D
[D/drv.emac] phy control status reg is 0x44
[W/drv.emac] eth transmit frame faild: 4
[D/drv.emac] phy basic status reg is 0x780D
[D/drv.emac] phy control status reg is 0x44
[W/drv.emac] eth transmit frame faild: 20
[D/drv.emac] phy basic status reg is 0x780D
[D/drv.emac] phy control status reg is 0x44
[W/drv.emac] eth transmit frame faild: 20
[D/drv.emac] phy basic status reg is 0x780D
[D/drv.emac] phy control status reg is 0x44
[W/drv.emac] eth transmit frame faild: 20
[D/drv.emac] phy basic status reg is 0x780D
[D/drv.emac] phy control status reg is 0x44
[W/drv.emac] eth transmit frame faild: 18
[D/drv.emac] phy basic status reg is 0x780D
[D/drv.emac] phy control status reg is 0x44
[W/drv.emac] eth transmit frame faild: 18
[D/drv.emac] phy basic status reg is 0x780D
[D/drv.emac] phy control status reg is 0x44
[W/drv.emac] eth transmit frame faild: 18
[D/drv.emac] phy basic status reg is 0x780D
[D/drv.emac] phy control status reg is 0x44
[W/drv.emac] eth transmit frame faild: 18
[D/drv.emac] phy basic status reg is 0x780D
[D/drv.emac] phy control status reg is 0x44
[W/drv.emac] eth transmit frame faild: 18
[D/drv.emac] phy basic status reg is 0x780D
[D/drv.emac] phy control status reg is 0x44
[D/drv.emac] phy basic status reg is 0x780D
[D/drv.emac] phy control status reg is 0x44
[D/drv.emac] phy basic status reg is 0x780D
[D/drv.emac] phy control status reg is 0x44
[D/drv.emac] phy basic status reg is 0x780D
[D/drv.emac] phy control status reg is 0x44
[W/drv.emac] eth transmit frame faild: 18
[D/drv.emac] phy basic status reg is 0x780D
[D/drv.emac] phy control status reg is 0x44
[D/drv.emac] phy basic status reg is 0x780D
[D/drv.emac] phy control status reg is 0x44
[D/drv.emac] phy basic status reg is 0x780D
[D/drv.emac] phy control status reg is 0x44
[D/drv.emac] phy basic status reg is 0x780D
[D/drv.emac] phy control status reg is 0x44
[D/drv.emac] phy basic status reg is 0x780D
[D/drv.emac] phy control status reg is 0x44
[D/drv.emac] phy basic status reg is 0x780D
[D/drv.emac] phy control status reg is 0x44
```

此期间办公司无人，我的座位是锁着的，莫非是网线问题。于是换了条网线测试，还是一样，过一段时间还是会出现上述错误。来此想问问大佬们，这种情况咋解决。这种错误有时候要过很久才能出来，有时候一会就出来了。
连线方式：
 电脑==》路由器《==开发板。如果有大佬遇到过还请指教，拜托了，已经调试了7天了??????![image.png](https://oss-club.rt-thread.org/uploads/20211216/59b390f64c4f64c7b75e0426922dd0e0.png.webp)