按照教程进行如下步骤：
1、buildroot 勾选iw、wpa_cli 、wpa_passphrase、wpa_supplicant
2、modprobe xr829
3、rm -rf /etc/wpa_supplicant.conf
4、wpa_passphrase mywifi 12345666 >> /etc/wpa_supplicant.conf
5、wpa_supplicant -B -iwlan0 -c /etc/wpa_supplicant.conf
然后连接不上，出现以下信息：
[ 195.406799] wlan0: authenticate with c2:0a:a2:85:36:19
[ 195.413368] [AP_WRN] BSS_CHANGED_ASSOC but driver is unjoined.
[ 195.420073] wlan0: send auth to c2:0a:a2:85:36:19 (try 1/3)
[ 195.420925] wlan0: Connection to AP c2:0a:a2:85:36:19 lost
[ 195.432602] [STA_WRN] [HT40][xradio_join_work][bss_ht_info]:
[ 195.432602] [primary_chan :0x00000001]
[ 195.432602] [ht_param :0x00000000]
[ 195.432602] [operation_mode:0x00000001]
[ 195.432602] [stbc_param :0x00000000]
[ 195.432602] [basic_set[0] :0x00000000]
[ 195.460461] [STA_WRN] [HT40][xradio_join_work][PhyModeCfg:0x0007]
[ 195.460461] [ModemFlags :0x00000007]
[ 195.460461] [ChWidthCfg :0x00000000]
[ 195.460461] [PriChCfg :0x00000000]
[ 195.460461] [BandCfg :0x00000000]
[ 195.460461] [STBC_Enable :0x00000000]
[ 195.460461] [PreambleCfg :0x00000000]
[ 195.460461] [SGI_Enable :0x00000000]
[ 195.460461] GF_Enable :0x00000000]
[ 195.534763] wlan0: authenticated
[ 195.548278] wlan0: associate with c2:0a:a2:85:36:19 (try 1/3)
[ 195.569771] wlan0: RX AssocResp from c2:0a:a2:85:36:19 (capab=0x1431 status=0 aid=1)
[ 195.581962] [AP_WRN] [STA] ASSOC HTCAP 11N 58
[ 195.586848] [AP_WRN] [HT40][xradio_bss_info_changed][ht_prot:0x00000000][HtProtMode:0x0000][Green:0x0000]
[ 195.587160] [AP_WRN] [HT40][xradio_bss_info_changed][PhyModeCfg:0x5007]
[ 195.587160] [ModemFlags :0x00000007]
[ 195.587160] [ChWidthCfg :0x00000000]
[ 195.587160] [PriChCfg :0x00000000]
[ 195.587160] [BandCfg :0x00000000]
[ 195.587160] [STBC_Enable :0x00000000]
[ 195.587160] [PreambleCfg :0x00000001]
[ 195.587160] [SGI_Enable :0x00000001]
[ 195.587160] [GF_Enable :0x00000000]
[ 195.643902] wlan0: associated
[ 195.657066] [TXRX_WRN] [RX] IF=0, No key found.
[ 195.691204] wlan0: deauthenticating from c2:0a:a2:85:36:19 by local choice (Reason: 1=UNSPECIFIED)
[ 195.701546] [WSM_WRN] Issue unjoin command(TX).
[ 195.707801] [WSM_WRN] STA mode, send_deauth_to_self
[ 195.713356] [TXRX_WRN] Issue unjoin command(TX) by self.
[ 195.724739] [STA_WRN] xradio_flush vif is null return
使用iw 命令查询
# iw wlan0 link
Not connected.
使用udhcpc
# udhcpc -i wlan0
udhcpc: started, v1.35.0
udhcpc: broadcasting discover
udhcpc: broadcasting discover
udhcpc: broadcasting discover
使用 ifconfig命令
# ifconfig
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:8 errors:0 dropped:0 overruns:0 frame:0
TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:777 (777.0 B) TX bytes:777 (777.0 B)
wlan0 Link encap:Ethernet HWaddr DC:44:6D:B7:AD:3D
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:14 errors:0 dropped:0 overruns:0 frame:0
TX packets:14 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2310 (2.2 KiB) TX bytes:2016 (1.9 KiB)
调试了好几天了都没有解决，是不是哪里少了点什么东西啊？
另外，连接无密码的wifi是正常的。