This is an old revision of the document!
Table of Contents
GPIO bit-bang driver for OpenWRT
Check-out
Prepare to build OpenWRT.
mkdir -p /embedded/openwrt/ cd /embedded/openwrt/ git clone git://git.openwrt.org/openwrt.git openwrt.git chown -R nobody:nogroup /embedded/openwrt/openwrt.git cd /embedded/openwrt/openwrt.git /bin/su nobody cp feeds.conf.default feeds.conf.default.orig echo "src-git openwrtfiles git://github.com/GBert/openwrt-files" >> feeds.conf.default ./scripts/feeds update -a ./scripts/feeds install kmod-bit-bang-gpio picprog-new ./scripts/feeds install nfs-utils
Config
Enable kernel options.
make menuconfig
[Target System = Atheros AR7xxx/AR9xxx]
[Target Profile = TP-LINK TL-WR841N/ND]
[Kernel Modules] [Other Modules] [kmod-bit-bang-gpio]
[Kernel Modules] [Wireless Drivers] [kmod-ath] [Force Atheros drivers to respect the
user's regdomain settings]
[Utilities] [picprog-new]
[Kernel] [Filesystems] [kmod-fs-nfs-common]
[Utilities] [Filesystem] [nfs-utils]
Disable kernel options.
[Global build settings] [IPv6 support in packages] [Base system] [dnsmasq] [Base system] [firewall] [Kernel Modules] [USB Support] [Network] [ppp] [Kernel Modules] [kmod-ppp] [Network] [odhcp6c] [Network] [odhcpd] [Network] [firewall] [ip6tables] [Network] [firewall] [iptables] [Kernel Modules] [Netfilter Extensions] [Kernel Modules] [kmod-ipv6]
Exit config.
[Exit] [Yes]
Build
make V=s [WAIT FOR A LONG TIME...]
Install
ls -1 bin/ar71xx/*factory* bin/ar71xx/openwrt-ar71xx-generic-tl-wr841nd-v1.5-squashfs-factory.bin bin/ar71xx/openwrt-ar71xx-generic-tl-wr841nd-v3-squashfs-factory.bin bin/ar71xx/openwrt-ar71xx-generic-tl-wr841nd-v5-squashfs-factory.bin bin/ar71xx/openwrt-ar71xx-generic-tl-wr841nd-v7-squashfs-factory.bin bin/ar71xx/openwrt-ar71xx-generic-tl-wr841n-v8-squashfs-factory.bin bin/ar71xx/openwrt-ar71xx-generic-tl-wr841n-v9-squashfs-factory.bin bin/ar71xx/openwrt-ar71xx-generic-tl-wr847n-v8-squashfs-factory.bin
From the router maintenance page upgrade the firmware using the correct image.
For this example, it's openwrt-ar71xx-generic-tl-wr841n-v8-squashfs-factory.bin
Login
telnet 192.168.1.1
Trying 192.168.1.1...
Connected to 192.168.1.1.
Escape character is '^]'.
=== IMPORTANT ============================
Use 'passwd' to set your login password
this will disable telnet and enable SSH
------------------------------------------
BusyBox v1.22.1 (2014-11-08 16:13:53 GMT) built-in shell (ash)
Enter 'help' for a list of built-in commands.
_______ ________ __
| |.-----.-----.-----.| | | |.----.| |_
| - || _ | -__| || | | || _|| _|
|_______|| __|_____|__|__||________||__| |____|
|__| W I R E L E S S F R E E D O M
-----------------------------------------------------
CHAOS CALMER (Bleeding Edge, r43216)
-----------------------------------------------------
* 1 1/2 oz Gin Shake with a glassful
* 1/4 oz Triple Sec of broken ice and pour
* 3/4 oz Lime Juice unstrained into a goblet.
* 1 1/2 oz Orange Juice
* 1 tsp. Grenadine Syrup
-----------------------------------------------------
Testing
Test GPIO-BB.
ssh -x root@192.168.1.1 rmmod leds_gpio modprobe gpio-bb && mknod /dev/gpio-bb c 180 0 vi /root/.k8048/config [CONFIGURE VPP=2] ktest vpp 5 TEST MODE VPP|PGD|PGC|PGM VPP LOW (ICSP 1) (D-SUB-9 TX 3) [3 seconds] VPP HIGH (ICSP 1) (D-SUB-9 TX 3) [5 seconds] VPP LOW (ICSP 1) (D-SUB-9 TX 3) [3 seconds] TEST DONE
Upgrade
cd /embedded/openwrt/openwrt.git
/bin/su nobody
scripts/feeds update -a
Updating feed 'packages' from 'git://git.openwrt.org/packages.git' ...
[WAIT FOR A WHILE...]
make V=s
[WAIT FOR A WHILE...]
scp bin/ar71xx/openwrt-ar71xx-generic-tl-wr941nd-v3-squashfs-sysupgrade.bin root@192.168.1.1:/tmp/
ssh -x root@192.168.1.1
sysupgrade -v /tmp/openwrt-ar71xx-generic-tl-wr941nd-v3-squashfs-sysupgrade.bin
[WAIT FOR REBOOT]
ssh -x root@192.168.1.1
BusyBox v1.19.4 (2014-03-17 16:43:34 GMT) built-in shell (ash)
Enter 'help' for a list of built-in commands.
_______ ________ __
| |.-----.-----.-----.| | | |.----.| |_
| - || _ | -__| || | | || _|| _|
|_______|| __|_____|__|__||________||__| |____|
|__| W I R E L E S S F R E E D O M
-----------------------------------------------------
BARRIER BREAKER (Bleeding Edge, r39935)
-----------------------------------------------------
* 1/2 oz Galliano Pour all ingredients into
* 4 oz cold Coffee an irish coffee mug filled
* 1 1/2 oz Dark Rum with crushed ice. Stir.
* 2 tsp. Creme de Cacao
-----------------------------------------------------
