HamsterBear F1C200s Linux v5.17 RTL8188EUS 适配

HamsterBear F1C200s Linux v5.17 RTL8188EUS 适配

• 平台 - F1C200s

• Linux版本 - 5.17.2

• Buildroot - v2022.2

底板做了USB HUB， 用的是FE1.1s，一共做了4路，其中一路拿来连wifi模块，另外
3个直接做成了USB Type-A接口

进入 kernel menuconfig 打开如下选项

（该驱动位于staging下，选择编译进内核）

buildroot中选择如下软件包

（主要是net-tools iw工具包）

启动系统后

1. 修改musb 为host模式

echo host > /sys/devices/platform/soc/1c13000.usb/musb-hdrc.1.auto/mode  [ 1379.560411] phy phy-1c13400.phy.0: Changing dr_mode to 1 [ 1380.223933] usb 1-1: new high-speed USB device number 2 using musb-hdrc [ 1380.405841] hub 1-1:1.0: USB hub found [ 1380.409764] hub 1-1:1.0: 4 ports detected [ 1380.833942] usb 1-1.1: new high-speed USB device number 3 using musb-hdrc [ 1381.146412] r8188eu: module is from the staging directory, the quality is unknown, you have been warned. [ 1381.170314] Chip Version Info: CHIP_8188E_Normal_Chip_TSMC_D_CUT_1T1R_RomVer(0) [ 1381.205020] EEPROM ID = 0x8129 [ 1381.212399] usbcore: registered new interface driver r8188eu

ip addr 可以看到对应wifi接口

# ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue qlen 1000     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00     inet 127.0.0.1/8 scope host lo        valid_lft forever preferred_lft forever 2: usb0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000     link/ether 52:8c:6f:55:1f:64 brd ff:ff:ff:ff:ff:ff 3: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000     link/ether 54:ef:33:d6:5e:72 brd ff:ff:ff:ff:ff:ff

2. 固件的导入

模块在上电的时候会加载固件/lib/firmware/rtlwifi/rtl8188eufw.bin
这个固件可以直接从你们linux pc机相同路径为止拷出来，这是我在调试的时候这样做的，
其实你们完全可以在编译环节搞定，在buildroot中，找到
Target packages -> Hardware handling -> Firmware
然后勾选好对应固件就可以了！如果不确定，那就全选上，只要你存储空间够大就行!

3. 连接到wifi

上电

# ifconfig wlan0 up [ 1687.899356] R8188EU: Firmware Version 11, SubVersion 1, Signature 0x88e1 [ 1688.274263] MAC Address = 54:ef:33:d6:5e:72

扫描附近wifi

# iwlist wlan0 scan wlan0     Scan completed :           Cell 01 - Address: 8C:DE:F9:EC:55:8B                     ESSID:""                     Protocol:IEEE 802.11bgn                     Mode:Master                     Frequency:2.422 GHz (Channel 3)                     Encryption key:off                     Bit Rates:144 Mb/s                     Quality:0  Signal level:0  Noise level:0           Cell 02 - Address: 96:DE:F9:EC:55:8B                     ESSID:"kernelbot"                     Protocol:IEEE 802.11bgn                     Mode:Master                     Frequency:2.422 GHz (Channel 3)                     Encryption key:off                     Bit Rates:144 Mb/s                     IE: Unknown: DD820050F204104A0001101044000101103B00010310470010876543219ABCDEF012340AA3C33C838F102100067869616F6D69102300045241383110240004303030321042000531323334351054000800060050F2040001101100135849414F4D495F524F555445525F4755455354100800020000103C0001031049000600372A000120                     Quality:0  Signal level:0  Noise level:0

连接到wifi

# iwconfig wlan0 essid kernelbot # iwconfig lo        no wireless extensions.  usb0      no wireless extensions.  wlan0     IEEE 802.11bgn  ESSID:"kernelbot"  Nickname:"<WIFI@REALTEK>"           Mode:Managed  Frequency:2.422 GHz  Access Point: 96:DE:F9:EC:55:8B           Bit Rate:72.2 Mb/s   Sensitivity:0/0           Retry:off   RTS thr:off   Fragment thr:off           Encryption key:off           Power Management:off           Link Quality=100/100  Signal level=0 dBm  Noise level=0 dBm           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0           Tx excessive retries:0  Invalid misc:0   Missed beacon:0

请求ip

# udhcpc -i wlan0 udhcpc: started, v1.35.0 udhcpc: broadcasting discover udhcpc: broadcasting select for 192.168.19.234, server 192.168.19.1 udhcpc: lease of 192.168.19.234 obtained from 192.168.19.1, lease time 43200 deleting routers adding dns 192.168.19.1

尝试访问外网(没接天线)

# ping baidu.com PING baidu.com (220.181.38.148): 56 data bytes 64 bytes from 220.181.38.148: seq=0 ttl=50 time=201.784 ms 64 bytes from 220.181.38.148: seq=1 ttl=50 time=225.148 ms 64 bytes from 220.181.38.148: seq=2 ttl=50 time=15.126 ms 64 bytes from 220.181.38.148: seq=3 ttl=50 time=116.496 ms 64 bytes from 220.181.38.148: seq=4 ttl=50 time=115.356 ms 64 bytes from 220.181.38.148: seq=5 ttl=50 time=21.000 ms 64 bytes from 220.181.38.148: seq=6 ttl=50 time=114.353 ms 64 bytes from 220.181.38.148: seq=7 ttl=50 time=122.406 ms ^C --- baidu.com ping statistics --- 8 packets transmitted, 8 packets received, 0% packet loss round-trip min/avg/max = 15.126/116.458/225.148 ms

更多玩法

1. MQTT与上位机通信

	大概业务就是 扫描传感器数据上报给上位机 	上位机也可以指定从机行为

2. 移植浏览器访问网页

3. 挂载主机NFS文件系统

4. 做内网WEB服务器

5. 暂时没想到

总结以及遇到的一些问题

总结

因为一开始设计思路就比较清晰，所以整个过程还是比较顺利的，底板设计的时候，因为
粗心大意连错了线，所以又再版了。

内核 buildroot那两块等有空再写详细点。

有问题可以联系我邮箱(writeforever@foxmail.com)

问题

1. 模块上电后扫描自动断开连接
   后来发现是供电不够，一开始一直用电脑USB接口供电，但那个最大电流貌似就500mA，
   换了个充电头就ok了。