建设网站类型,设计师做兼职的网站有哪些,关键词堆砌的作弊网站,设计官方网站#xfeff;#xfeff;交叉编译器#xff1a;arm-linux-gcc-4.5.4
Linux内核版本#xff1a;Linux-3.0
主机操作系统#xff1a;Centos 6.5
开发板#xff1a;FL2440
GPRS:SIM900A
在开发SIM900模块之前#xff0c;开发板已经加载了linux内核以及文件系统#xf…交叉编译器arm-linux-gcc-4.5.4
Linux内核版本Linux-3.0
主机操作系统Centos 6.5
开发板FL2440
GPRS:SIM900A
在开发SIM900模块之前开发板已经加载了linux内核以及文件系统并且开发板串口已经使能。并且一定要注意的是要有一张没有欠费的电话卡不要笑这是个很严肃的问题
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所需源码
ppp-2.4.4.tar.gz http://download.chinaunix.net/download.php?id35208ResourceID8334 注个人觉得这是一个比较典型又比较简单的移植问题。
大体步骤添加内核ppp上网的支持--编译ppp-2.4.4生成一些可执行文件(pppd, chat, pppdump, pppstats)放到开发板的/usr/sbin/目录下--将可执行脚本放在开发板的指定位置(/etc/ppp/peers/gprs, /etc/ppp/chat-gprs-connect)并执行pppd命令。 一、添加内核支持
Linux-3.0以上的版本中rt3070的驱动已经加入了内核源码中去了本篇用的是Linux-3.0的内核只需要在内核的make menuconfig中选择ppp上网的支持就可以了。
修改如下
Device Drivers --- [*] Network device support --- * PPP (point-to-point protocol) support [*] PPP multilink support (EXPERIMENTAL) * PPP support for async serial ports * PPP support for sync tty ports * SLIP (serial line) support [*] CSLIP compressed headers 二、编译ppp-2.4.4
# tar -xzf ppp-2.4.4.tar.gz
# ./configure
# make CC/opt/buildroot-2012.08/arm920t/usr/bin/arm-linux-gcc (交叉编译器)
如果编译成功则会在pppd, chat, pppdump, pppstats下分别生成可执行程序pppd, chat, pppdump, pppstats。将其拷贝到开发板的/usr/sbin目录下。 三、开发板的配置
# vi /etc/ppp/peers/gprs 1 # Usage: rootpppd call gprs2 3 #set seriral4 /dev/ttyS15 6 # set baudrate7 1152008 9 # set flowdate
10 nocrtscts
11
12 connect /usr/sbin/chat -v -f /etc/ppp/gprs-connect-chat
13
14 #set debug ,send message to /var/log/messages
15 debug
16
17 #To keep pppd on the terminal
18 nodetach
19
20 #hide-password
21
22 # Accept the peers idea of our local IP address
23 ipcp-accept-local
24 # Accept the peers idea of its (remote) IP address
25 ipcp-accept-remote
26
27 #dial up connetion as the default route
28 defaultroute
29
30 usepeerdns # vi /etc/ppp/chat-gprs-connect 1 #Copyright (c) 2016 guanlei 995318056qq.com2 # This is second part of the ppp dial script. It will perform the connection3 #4 ABORT BUSY5 ABORT NO ANSWER6 ABORT NO CARRIER7 ABORT NO DIALTONE8 ABORT ERROR9 ABORT \nRING\r\n\r\nRING\r
10 TIMEOUT 20
11 \rAT
12 #set apn
13 OK ATCGDCONT1,IP,cmnet
14 # ............
15 OK ATDT*99***1# //这里要改成相应的运行商的设置
16 SAY requesting data connection\n
17 CONNECT
18 SAY connected\n 使能pppd:
# pppd call gprs (表示后台运行)
配置完就可以了现在可以测试一下上网功能了
# ping www.baidu.com
PING www.baidu.com (103.235.46.39): 56 data bytes
64 bytes from 103.235.46.39: seq0 ttl48 time555.719 ms
64 bytes from 103.235.46.39: seq1 ttl48 time273.481 ms --- www.baidu.com ping statistics ---
3 packets transmitted, 2 packets received, 33% packet loss
round-trip min/avg/max 273.481/414.600/555.719 ms
# ifconfig
ppp0 Link encap:Point-to-Point Protocol inet addr:10.110.1.110 P-t-P:192.200.1.21 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1 RX packets:10 errors:0 dropped:0 overruns:0 frame:0 TX packets:12 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:686 (686.0 B) TX bytes:557 (557.0 B)
