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说明,3G模块已经转换成了/dev下的tty设备。
1,使用pppd2.4.5版本,静态交叉编译pppd和chat后,将pppd,chat传到开发板中;
执行pppd命令如下:- #pppd connect 'chat -v "" "AT" "" "ATDT*99# CONNECT"' user CARD password CARD /dev/ttyUSB0 115200 nodetach crtscts debug usepeerdns defaultroute
- Warning: couldn't open ppp database /var/run/pppd2.tdb
- [color=#BF0000]bbbbbbbbbbbbbbbbbbbbbbbbbb[/color]这里是我在源代码pppd/auth.C中添加的打印信息。
- Fatal signal 11
- Script chat -v "" "AT" "" "ATDT*99# CONNECT" finished (pid 1633), status = 0x7f
- Connect script failed
- Show the Channel's connect value: -1 //在调用chat时,不能分配到channel!
复制代码 2,使用pc自带的gcc静态编译pppd和chat,在pc上执行pppd命令:- #sudo ./pppd connect '/home/user/mydisk/ww/chat -v "" "AT" "" "ATDT*99# CONNECT"' user CARD password CARD /dev/ttyUSB_utps_modem 115200 nodetach crtscts debug usepeer
- [sudo] password for user:
- Script /home/user/mydisk/ww/chat -v "" "AT" "" "ATDT*99# CONNECT" finished (pid 2236), status = 0x0
- Serial connection established.
- Show the Channel's connect value: 7 可以分配到channel,并且成功连接
- qqqqqqqqqwwwwwwwwwwwwwwweeeeeeeeeeeeeee
- using channel 1
- Using interface ppp0
- Connect: ppp0 <--> /dev/ttyUSB_utps_modem
- sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x559ef22b> <pcomp> <accomp>]
- rcvd [LCP ConfReq id=0x0 <asyncmap 0x0> <auth chap MD5> <magic 0xf7f856> <pcomp> <accomp>]
- sent [LCP ConfAck id=0x0 <asyncmap 0x0> <auth chap MD5> <magic 0xf7f856> <pcomp> <accomp>]
- rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0x559ef22b> <pcomp> <accomp>]
- sent [LCP EchoReq id=0x0 magic=0x559ef22b]
- rcvd [LCP DiscReq id=0x1 magic=0xf7f856]
- ……
复制代码 3,在pc上可以连接,而在开发板上出错,说明pppd源码包没问题,交叉编译工具是用来编译内核的,应该也不会有问题;
在开发板上使用AT命令测试转换后的3G模块:- # echo ATDT*99#>/dev/ttyUSB0
- # cat /dev/ttyUSB0 ATDT*99#
- CONNECT 7200000
- NO CARRIER
复制代码 说明转换的3G模块应该没有问题,不知道应该从哪里去搞,已经弄了两周了,麻烦各位大虾帮忙看看,谢谢! |
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