OKMX6UL-C3调试记录-WIFI

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飞凌OKMX6UL-C3控制单元板载WIFI调试

系统信息

U-Boot 2015.04-g4df34a6 (Jun 07 2018 - 09:19:48)

CPU:   Freescale i.MX6UL rev1.2 at 396 MHz
CPU:   Temperature 52 C
Reset cause: POR
Board: MX6UL 14x14 EVK
I2C:   ready
DRAM:  256 MiB
NAND:  256 MiB
MMC:   FSL_SDHC: 0
*** Warning - bad CRC, using default environment

Display: TFT70AB-800x480 (800x480)
Video: 800x480x24

NAND read: device 0 offset 0x400000, size 0x200000
 2097152 bytes read: OK
 display bmp cfb_console.c
In:    serial
Out:   serial
Err:   serial
Net:   Phy 1 not found
PHY reset timed out
FEC1
Error: FEC1 address not set.

Normal Boot
Hit any key to stop autoboot:  0 

硬件方案：FETMX6UL-C核心板+参考OKMX6UL-C3控制单元成品制作的底板，其中板载wifi模块为RTL8723BU，板载核心板为C3成品上已烧录的核心板
参考手册：OKMX6UL-C3控制单元操作指导书-V1.6-2018.11.15

步骤1： 上电模块加载
底板上电，启动linux系统，wifi模块会自动加载，root登录后可使用lsmod指令查看

root@freescale ~$ lsmod 
8723bu 1280657 0 - Live 0x7f004000
evbug 1854 0 - Live 0x7f000000
root@freescale ~$

步骤2： 检测wifi网卡状况

root@freescale ~$ ifconfig wlan0
wlan0     Link encap:Ethernet  HWaddr 54:C9:DF:0B:5B:A1  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:24215 errors:0 dropped:2116 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

root@freescale ~$ 

步骤3： 设置网卡

root@freescale ~$ ifconfig eth0 down
root@freescale ~$ 
root@freescale ~$ ifconfig eth1 down
root@freescale ~$ 
root@freescale ~$ ifconfig wlan0 up
root@freescale ~$ 

步骤4： 扫描可用的无线网络

root@freescale ~$ iwlist wlan0 scan
wlan0     Scan completed :
          Cell 01 - Address: EE:08:8D:43:54:96
                    ESSID:"iphone7"
                    Protocol:IEEE 802.11bgn
                    Mode:Master
                    Frequency:2.437 GHz (Channel 6)
                    Encryption key:on
                    Bit Rates:144 Mb/s
                    Extra:rsn_ie=30140100000fac040100000fac040100000fac020c00
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
                    Quality=43/100  Signal level=65/100  
                    Extra:fm=0003

步骤5： 配置wpa_supplicant.conf
由于wifi使用的是WPA加密方式，需配置/etc/wpa_supplicant.conf（目录下没有该文件则新建一个），文件内容如下：

network={
        ssid="iphone7"
        #psk="wjl12345678"
        psk=5e666c8bc4cd2378ec71fc4073a468721709fbbeb7358a8cc8802f960c4808cc
} 

步骤5： 设置ESSID

root@freescale ~$ iwconfig wlan0 essid iphone7
[ 1537.943636] RTL871X: set ssid [iphone7] fw_state=0x00000008
root@freescale ~$ 
root@freescale ~$ [ 1537.991587] RTL871X: start auth
[ 1537.997118] RTL871X: auth success, start assoc
[ 1538.009150] RTL871X: indicate disassoc

特别注意： 厂家操作指导书中这个指令操作后出现的是assoc success,下图这样

而我的板子操作后是indicate disassoc，厂家技术支持意见：继续往下进行！（这个地方卡了我好久，程序员直觉告诉有报错就一定有问题，暂时先往下走）

步骤6： 连接路由器

root@freescale ~$ 
root@freescale ~$ wpa_supplicant -Dwext -c/etc/wpa_supplicant.conf  -iwlan0 & 
root@freescale ~$ 
root@freescale ~$ rfkill: Cannot open RFKILL contro[ 1910.062165] RTL871X: set bssid:00:00:00:00:00:00
l device
ioctl[SIOCSIWAP]: Operation not permitted
wlan0: Trying to associate with e[ 1911.706046] RTL871X: set ssid [iphone7] fw_state=0x00000008
e:08:8d:43:54:96 (SSID='iphone7' freq=2437 MHz)
[ 1911.715952] RTL871X: set bssid:ee:08:8d:43:54:96
[ 1911.748680] RTL871X: start auth
[ 1911.755043] RTL871X: auth success, start assoc
[ 1911.764066] RTL871X: assoc success
[ 1911.767733] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
wlan0: Associated with ee:08:8d:43:54:96
[ 1911.784567] RTL871X: send eapol packet
[ 1911.798045] RTL871X: send eapol packet
wlan0: WPA: Key negotiation completed with ee:08:8d:43:54:96 [PTK[ 1911.806024] RTL871X: set pairwise key camid:4, addr:ee:08:8d:43:54:96, kid:0, type:AES
=CCMP GTK=CCMP]
wlan0: CTRL-EVENT-CONNECTED - Connection to ee:0[ 1911.820719] RTL871X: set group key camid:5, addr:ee:08:8d:43:54:96, kid:2, type:AES
8:8d:43:54:96 completed (auth) [id=0 id_str=]

步骤7： 自动IP地址分配dhcp

root@freescale ~$ udhcpc -iwlan0
udhcpc (v1.23.1) started
Sending discover...
Sending select for 172.20.10.3...
Lease of 172.20.10.3 obtained, lease time 85536
Deleting routers
adding dns 172.20.10.1

步骤8： 联网测试

root@freescale ~$ ping www.baidu.com
PING www.baidu.com (14.215.177.39): 56 data bytes
64 bytes from 14.215.177.39: seq=0 ttl=53 time=61.762 ms
64 bytes from 14.215.177.39: seq=1 ttl=53 time=58.229 ms
64 bytes from 14.215.177.39: seq=2 ttl=53 time=57.622 ms
64 bytes from 14.215.177.39: seq=3 ttl=53 time=92.595 ms

以上为后知后觉调试全过程，在参考厂家文档过程中由于出现indicate disassoc这个问题，导致功能测试停滞不前，一直努力在网上查找相关解决方法，一度怀疑硬件是否有问题。最终实现顺利连接wifi,但中途为何出现indicate disassoc这个问题一直没搞懂！

本文标签： OKMX6ULwifi