happylife的专栏

Rockie's Android Porting Guide（4）——Add SD card to your system

hongjiujing — Mon, 27 Dec 2010 14:27:00 +0800

Rockie's Android Porting Guide（4）——Add SD card to your system
Rockie Cheng
Andorid use vold to manage SD card and it is easy to use.
But I meet many troubles and finally find that the real problem is in the Linux Kernel.
Thanks to the Android Mail List.
Part I (kernel)
(1)make sure thus kernel configuration in MMC driver
CONFIG_MMC=y
# CONFIG_MMC_DEBUG is not set
CONFIG_MMC_UNSAFE_RESUME=y
# CONFIG_MMC_EMBEDDED_SDIO is not set

Android Poweroff 方法

hongjiujing — Thu, 09 Sep 2010 15:31:00 +0800

To shichexixi ，你好，我直接采用的是用源码编译的，你可以根据提供的文件去查看源代码中GOOGLE是怎么调用关机重启的，更深入的理解就要参考wiki14 帖子中提到的代码了。注意添加权限。

关机：
In frameworks/base/services/java/com/android/server/BatteryService.java

Intent intent = new Intent(Intent.ACTION_REQUEST_SHUTDOWN);

intent.putExtra(Intent.EXTRA_KEY_CONFIRM, false);

intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

mContext.startActivity(intent);

重启：

Re: [PATCH RFC] maxSize option for usb-serial to increase max endpoint buffer size

hongjiujing — Mon, 16 Aug 2010 15:03:00 +0800

I've been working with Ken on getting this driver to work better
(meaning faster). Here's the latest version (without your new device id
added). Care to test it out and let me know if it works or not?

thanks,

greg k-h
/*
* AirPrime CDMA Wireless Serial USB driver
*
* Copyright (C) 2005-2006 Greg Kroah-Hartman
*
* This program is free software; you can redistribute it and/or

S3C6410 KEYPAD扫描算法

hongjiujing — Mon, 09 Aug 2010 12:21:00 +0800

s3c6410 kepyad 扫描算法：

初始化状态，所有的列输出低电平。没有键按下时，所有的行都是高（上拉），当有任意一个键按下时，相应的行输出低，产生一个键盘中断。
ＣＰＵ将一列写低电平(initliaze)，其他列写高电平。每一次写，ＣＰＵ读取KEY_ROW中的相应位的值，判断是哪一列的键按下了。
例如：当我们写KEY_OUT(列）为11101111,将第４列全置低，读取KEYIN（ROW)值为11101111,就说明第４行第４列的键被按下了。

Performance Measurement on ARM

hongjiujing — Fri, 30 Jul 2010 13:34:00 +0800

After working mostly with different ARM processors in the 200...400 MHz range in lots of Embedded Linux projects over the last years, we have seen an interesting development in the market recently: ARM cpus, having been known for their low power consumption, are becoming faster and faster (example: OMAP3, Beagleboard, MX51/MX53).
x86, having been known for its high computing performance, is becoming more and more SoC-like, power friendly and slower.
If you read th

RT2070 ARM-linux

hongjiujing — Thu, 15 Jul 2010 14:22:00 +0800

http://ubuntuforums.org/showthread.php?t=1285828Tenda W541U V2.0 Wireless USB Adapter / Ralink RT2070 How To Hi, After some time of searching, switching between sadness and happiness and pulling my hair out I finally got my Tenda W541U V2.0 a.k.a. Tenda 54M Mini, a.k.a. Ralink RT2070L working. I wrote this tutorial because I googled and I found nothing, nobody seems to know how to do it or is not willing to share his method. I even emailed Tenda support and they said

Samsung Android分支代码学习

hongjiujing — Wed, 14 Jul 2010 17:59:00 +0800

前言：没有s5pc110/s5pv210/s5pc100开发板，照样学习，哈哈。

进入三星相关的vendor目录：

smdkc100 smdkv210 setup.sh

C100主板相关配置文件为：
# we can't call my-dir since it's not defined yet

LOCAL_PATH := $(dir $(lastword $(MAKEFILE_LIST)))

include $(LOCAL_PATH)/../common/BoardConfigCommon.mk

TARGET_BOARD_PLATFORM := S5PC100

USE_DEV_S3C_SDHCI := true

BOARD_HDMI_STD := STD_720P
注：S5PC10

Intel ce4100 Google TV Develop

hongjiujing — Fri, 18 Jun 2010 11:49:00 +0800

Intel ce4100 Android TV Develop and S Android STB Develop

Ubuntu10.04问题集锦

hongjiujing — Thu, 27 May 2010 09:40:00 +0800

Upgrade Linux Ubunut9.10 to Ubuntu10.04 LTS

Changlog:

1:Fix Txt bug
在UBUNTU10.04下无法打不开TXT文件，已经进行了如下设置了！
打开终端输入：gconf-editor
因为默认使用 gedit打开的txt所以找到“apps”->"gedit-2"->"preferences"->"encodings" 中的“auto-detected”双击在弹出对话框中加入GB18030，调到最上。
2:Google Music Flash中文乱码
tommy@tommy-desktop:~$ sudo gedit /etc/fonts/conf.d/49-sansserif.conf

Porting WiFi drivers to Android

hongjiujing — Fri, 07 May 2010 08:29:00 +0800

Porting WiFi drivers to Android

PaNiC Random Rant (or how we used to call it: .plan)

Thursday, April 29, 2010
Porting WiFi drivers to Android

For mini-box.com picoPC we want to support several USB and miniPCI WiFi dongles, this guide provides a step by step explanation of what's involved in adding a new wifi driver and making wifi work in a custom Android build (this guide was written for android 2.1 but should be applicable to pr