Recently, Tsinghua Purple, Wuhan New core in the field of memory chips frequently, so that we look at the previously neglected memory chip. For a long time, in the CPU,GPU, baseband and other "advanced" chip spotlight under the cover-up, memory chip has been in obscurity, however, any one involving digital IC products, small to the bank card, big to the server, it is impossible to exist from the memory chip, Because the guru von Neumann has pointed out that the core of modern computer control is
How is the Android storage system optimized?The answer is I don't know ...Then why do you think you should write this article? I wanted to write down what I knew, mainly because one evening and a colleague discussed the optimization of the Android phone storage system. People who have used an Android phone may have this feeling that the system will become slower after the phone has been used for a long time. Slow, and one of the most important things about Android is the storage system. We now h
Why use the advantages of Beaglebone BeagleboneCurrently, a typical microcontroller-based board is priced at about 120 yuan, while Beaglebone Black is priced at about 330 yuan. What else did you get for the extra money besides the more powerful processors?1.2.1 Built-in networkThe built-in network is not just the onboard Ethernet interface, but also all the available network toolkits in Linux. With these to
Starterware on am335x on the burn run
Steps:1, download installs the Starterware, our group buys the SK to need 02.00.00.07 version. Recent external network access slow, I upload to the forum.2, find a MINISD card, do not need very large, the system only a few m just.3, if you follow the default path installation, please go to C:\ti\AM335X_StarterWare_02_00_00_07\tools\sd_format below to perform Ti_sdcard_boot_utility_v1_0.exe4, in the path C:\ti\AM335X_StarterWare_02_00_00_07\bin
This article transferred from:http://www.topeetboard.comUbuntu System Burn-Write hardware platform : iTOP4412 Development BoardNeed to prepare: Serial line, card reader, an SD card is preferably 2G(Own), another card ( greater than or equal to 2G Yes, you can also use the U - disk )Software platformUbuntu operating system,Windows systemSuper TerminalImage files and compressed packages, in the Ubuntu folder of the CD , and the other 2 operating systems are differentUbuntu Burn-Write stepsStep On
In accordance with the Convention, first introduce my own development environment:
System: Win7 64bit SP1
CCS version: Code Composer Studio 6.2.0
Debug code: AM335X_STARTERWARE_02_00_01_01
Emulator: Xds100v2 USB
Circuit board: Its own according to Beaglebone_black, the chip is AM3358, including the Hundred Gigabit Network port, UART serial port, DDR3, NAND Flash, USB, SPI and IIC, in addition to SPI and IIC IO pin, Other circuits fully refer to the Beaglebone_black board
success of loading.
I. Knowledge of device tree files
So what exactly does device tree look like? The first thing to know is that they have three formats: a source file *.dts for human reading (device tree source), and two files that are compiled to the system *.DTB (device tree blob) and *.DTBO (Device tree blob Overlay).
In the/lib/firmware/directory of BBB, you can see a lot of *.dts files. Let's just open one (Bb-uart1-00a0.dts) and see what they look like:
* * Copyright (C) 2013 Circu
1. setenv command
This command is used to set environment variables, as described below
# setenv
setenv-set Environment Variables
Usage:
setenv Name Value ...
-Set environment variable ' name ' to ' Value ... '
setenv name
-delete environment variable ' name 'As described, when you want to set an environment variable, the usage is as follows:
setenv Name Value, when you want to delete an environment variable, use such as:
setenv name。 The implementation of the function is mostly a stri
Install Ubuntu on SD card
Reference: http://embeddedprogrammer.blogspot.co.at/2012/10/beaglebone-installing-ubuntu-1210.html
1. First download the relevant Image File
Wget http://rcn-ee.net/deb/rootfs/raring/ubuntu-13.04-console-armhf-2013-07-22.tar.xz
2. The next step is to decompress the package.
Tar xjf ubuntu-13.04-console-armhf-2013-07-22.tar.xz
CD ubuntu-13.04-console-armhf-2013-07-22
3. Execute the script file in the folder
Sudo./setup_sdcard.s
Recovery/etc/install-recovery.sh
Source file for upgrade:
Boot. img
/System
Recovery/recovery-from-boot.p
Another important file is/etc/recovery. fstab, which is determined by the emmc partition solution.
-------- /etc/recovery.fstab -----------/boot emmc/dev/block/mmcblk0p1/sdcard vfat/dev/block/mmcblk0p4/recovery emmc/dev/block/mmcblk0p2/system ext4/d
Menu interface, press:0: Enter the parameter Settings menu4: Enter the start-Up Settings menuX: According to the actual selection of the desired boot system, 0 means that the default startup mode is set to ubuntu,1 means the default startupThe system is set to Android. 2 indicates that the Android system will be started with NFS using the default TFTP.S: Save the settings and use the system set here by default the next time you start.The default mode set here will be used the next time the syste
Transferred from: http://my.oschina.net/liucundong/blog/288183I have a ZTE Android phone, the model is ZTE U930HD, the phone is not plugged into the external SD card (that is, micro SD cards, formerly known as Trans-flash Card (TF), 2004 formally renamed Micro SD card), But the fuselage comes with a built-in memory card (i.e., eMMC storage, size 2G).I plug this phone into a computer with a data cable, and I see a drive letter that installs「R.E Manager
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1.3 required knowledge 1.3.1 about mount
By default, the system partitions after startup are read-only, so even if your mobile phone is already root, what you see during terminal operations is read-only and cannot be modified, you need to re-mount the disk once. The core script is as follows:
mount -o remount,rw /emmc@android /system
1.3.2 executable per
This article describes the Android programming to achieve a mobile phone with the internal storage path to obtain the method. Share to everyone for your reference, specific as follows:
I have a ZTE's Android phone, model is ZTE U930HD, the mobile phone did not insert an external SD card (that is, micro SD cards, formerly known as Trans-flash Card (TF), 2004 officially renamed as Micro SD), But the fuselage has a built-in memory card (i.e. EMMC storag
clubs around the world to benefit more people.2.armcore-Full Chi A20Armcore is an open-source hardware customized by the Mattel company for enterprise-class DIY, and its standards are based on industry-level development. In order to facilitate enterprise development products, Armcore the CPU, DDR, FLASH, PMU and other core modules packaged on a core board, and the Android system integrated into the system, basically the mainstream standard equipment on the market to drive all have everything, i
In Ubuntu, go to odroid U3 Board eMMC card Burning write Xubuntu image file, the main steps are as follows:
1. Download the image file to burn, as required, I downloaded the desktop version of the XUBUNTU-13.04-DESKTOP-ARMHF_ODROIDU2XXXX.IMG.XZ.
2. Unzip the file and enter the command under Terminal:
Xz-d XUBUNTU-13.04-DESKTOP-ARMHF_ODROIDU2_20130503.IMG.XZ
3. View the file system and mount points. After inserting the
Tags: device node roo input Sha can cat MMC enter key platform1. PrefaceThe platform for the Linux system solidification experiment is Guangzhou Chuang Long tl5728-idk Development BoardIntroduction to the Development Board:? Based on Ti AM5728 floating-point dual dspc66x+ dual ARMCORTEX-A15 industrial control and high performance audio and video processor;? Strong video codec capability, support 1-way 1080p60 or 2-way 720p60 or 4-way 720P30 video hardware codec, support h.265 video soft decoding
The Problem Analysis steps are as follows:
I,
GPT probability of the msm8916 platform: after the software is downloaded using the qpst emmc Software Download tool, it cannot be started. For example:
Log analysis indicates that the userdata partition fails to be mounted.
II,
ADB shell ls/dev/block shows that the machine that fails to be started has one fewer partition than the machine that fails to be started: mmcblk0p28, which is the partition where
The problem analysis process is as follows:OneMSM8916 gpt probability problem: After downloading software tools using qpst emmc software download, the system cannot be powered on. For example, the following drawings:Log parsing is the UserData partition did not succeed Mount.Watermark/2/text/ahr0cdovl2jsb2cuy3nkbi5uzxqvrnlib24=/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/dissolve/70 /gravity/center ">TwoADB shell Ls/dev/block display. Machine that fa
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