妮仔的學習筆記

2010年7月18日星期日

echo 7 > proc/sys/kernel/printk

Android 3G
Using iw command to link AP

# enable wifi # iw dev wlan0 scan | grep SSID # iw wlan0 connect "SSID" # iw dev wlan0 link # netcfg wlan0 dhcp Turn off pow...
* Audio: I2S and Linux sound system

System: ------------ -------- | Embedded | ---->I2S | audio | I2C | codec | ----->AMP -->speaker -----...
Linux script : 2>&1

2>&1 表示將stderr導向輸出stdout 0: stdin 1: stdout 2: stderr exampe: # /tmp/test.sh > /tmp/test.log 2&1
How to separate config into project

How to separate config into project : Ex: If we want to access different DRAM, we must build differnet config into image 1. bootloader: B...
更新git

使用的是ubuntu 10.04,出現這個問題 fatal: git 1.7.2 or later required git版本太舊處理的方法如下: $ sudo add-apt-repository ppa:git-core/ppa $ sudo apt-g...
Generate git patch

step1: #git format-patch -o /tmp/ xxxxx^..xxxx ^上一筆 ..到 xxxxx^..xxxx : 給範圍 ex: git format-patch -o /tmp/ 401dcd873a6550158429999039cc3c1fcbb...
Modify ramdisk.img on android

open device board and find ramdisk.img location 1. #ls /dev/block 2. #cd /data/tmp 3. #mount -t ext3 /dev/block/mmcblk0p1 mnt/ 4. on /data/t...
Linux script: Quoting

http://bash.cyberciti.biz/guide/Quoting The double quote " : variable and command will be run The single quote ' : variable and ...
Using wpa_supplicant on Android

service wpa_supplicant /system/bin/wpa_supplicant -Dtiwlan0 -itiwlan0 -c/data/misc/wifi/wpa_supplicant.conf -dd socket wpa_tiwlan0 dgram...

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