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RSS订阅转载 GCC's Conditionals with Omitted Operands
Conditionals with Omitted OperandsThe middle operand in a conditional expression may be omitted. Then if the first operand is nonzero, its value is the value of the conditional expression.There
2009-11-08 02:48:00
571
转载 likely,unlikely宏与GCC内建函数__BUILDIN_EXPECT
function StorePage(){d=document;t=d.selection?(d.selection.type!=None?d.selection.createRange().text:):(d.getSelection?d.getSelection():);void(keyit=window.open(http://www.365key.com/storeit.
2009-04-28 01:25:00
858
转载 DDR2 ROUTING GUIDELINES
DDR2 ROUTING GUIDELINES: All signals from the FPGA to DDR2 modules and to the VTTtermination resistors are 50-ohm transmission lines referenced to theground planes.The ground planes mu
2009-02-28 00:36:00
662
转载 General layout Guidelines
General layout Guidelines1. Diode/LED footprint needs to have polarity. The symbol of the diode can be present inside the outline.2.Positive polarity for tantalum and electrolytic capacitors nee
2009-02-28 00:34:00
516
转载 DDR ROUTING GUIDELINES
DDR does requirecleaner reference signals, reduced setup and hold times, and matchedsignal lengths to reduce signal skew effects.Vrefshould be isolated from other nets, decoupled from both
2009-02-28 00:30:00
664
转载 Kernel Symbols and CONFIG_MODVERSIONS
Contained within linux-2.4.2 source, found it hereKernel Symbols and CONFIG_MODVERSIONS ------------------------------------- Mark McLoughlin
2009-02-24 00:38:00
669
转载 笔记本安装Debian设置CPU的speedstep
http://www.linux-wiki.cn/index.php/Debian%E4%BD%BF%E7%94%A8CPU%E9%A2%91%E7%8E%87%E8%B0%83%E8%8A%82 前言现在的CPU耗电很大，按需调节CPU频率有对节能有重要的意义，目前多数Linux发行版都已经默认启用了这个功能，但是Debian 4.0和Archlinux还没有，需要经过简单的设置才行。，
2009-02-17 20:38:00
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原创 Telnet to Moto A780
MontaVista Linux Consumer Electronics Edition 3.0Linux/armv5tel 2.4.20_mvlcee30-mainstone(none) login: rootLinux 192.168.1.11 2.4.20_mvlcee30-mainstone #7 Fri Feb 13 15:39:51 CST 2004 armv5tel unknown
2009-01-12 19:49:00
1095
转载 HLR/VLR/AuC
TheHLR (Home Location Register) is a network database that stores andmanages all details of each mobile phone subscriber that is registeredin the corresponding GSM core network. Specifically, th
2009-01-10 00:50:00
1177
转载 Motorola cellphone Firmware
Quoted from http://wiki.openezx.org/Original_firmware_versionsOfficial Firmware Motorola distributes several variants of firmware for the A780 specialized for various regions, feature sets, etc.
2009-01-06 01:43:00
926
转载 Motorola's EMU(Enhanced Mini USB)
Quoted from “http://wiki.openezx.org/EMU”The A780 has a mini USB connector that motorola calls "Enhanced MiniUSB" or in short "EMU". The Enhancement consists of several differentmodes that the por
2009-01-05 19:07:00
1071
转载 How to set up usblan and telnet for A780 in 3 easy steps
Switch your device to usblan mode.Enter the "Setup" application on your device. Configure "USB Mode" to "Modem".Connect your device to your PC with the USB cable. Youll need to doeverything after
2009-01-04 22:05:00
1272
转载 Xilinx's ibis and pkg file
http://www.xilinx.com/support/answers/21632.htmHow do I integrate per pin parasitic packagedata (in the .pkg file) provided in the IBIS archive into the IBISfile? How do I ensure that the latest I
2008-12-17 22:30:00
3188
转载 DCI impedance value
http://www.xilinx.com/support/answers/11450.htmVirtex-II/Virtex-II Pro/Virtex-4/Virtex-5IBIS/SPICE models - How does an IBIS or SPICE simulation account forthe DCI impedance value?
2008-12-15 00:50:00
1205
转载 V5 IBIS model of SSTL DCI
V5 IBIS model of SSTL DCI Howdy all.I havnt been able to locate infomation on this, so I apologize if this has been discussed before.I am doing some signal integrity simulations between a V5 LX110T a
2008-12-13 00:28:00
1413
原创 Unable to handle kernel paging request for data at address 0x00000000
Linux version 2.6.26.3 (gr1x@mars) (gcc version 4.2.2) #1 Mon Sep 8 23:39:50 CS8console [udbg0] enabledsetup_arch: bootmemarch: exitZone PFN ranges: DMA 0 -> 131072 Normal 131072 -
2008-09-10 12:23:00
4760
原创 通过dump内存中printk的__log_buf地址查看Linux启动部分的错误
已经将u-boot移植到了自己做的demo板上，现在开始移植linux PowerPC内核，前两天用bootm引导内核，当执行到： /* * Linux Kernel Parameters (passing board info data): * r3: ptr to board info data * r4: initrd_s
2008-09-10 00:20:00
6774
转载 Vim Tips
1、用vi 复制第5行到第10行并粘贴到第12行之后： 方法1： 光标放到第五行， 输入：y6y 光标放到第12行， 输入：p 方法2： 命令行模式下输入 :5,10 co 12 方法3： 光标移到起始行，输入ma 光标移到结束行，输入mb
2008-09-04 19:08:00
581
原创 IPv6 FAQ
1. 互联网是怎样产生的？20世纪60年代初，人们为了提高计算机的性能，把几台计算机连接起来使用，这便是最初的网络。但这种网络实在是太简单了，不仅传输数据速度极慢，而且只要有一台计算机出现故障，就会导致整个网络无法运行下去。 到了60年代末期，美国国防部下属的高级研究项目管理局完成了计算机网络的改造任务，并把它称为阿帕网（APPAnet），阿帕网是由许多局域网组成的，它通过电话线相连
2008-09-01 20:41:00
594
原创 tcpdump/ethereal的过滤规则
1. 基于主机的捕获host host #host可以是主机名或IP地址src host host #host作为数据包的源地址dst host host #host作为数据包的目的地址$tcpdump -t -vv -n -i eth0 -s 512 host 1337::12. 基于端口号port port
2008-09-01 20:39:00
1046
转载 How to choose an in-circuit emulator
How to choose an in-circuit emulatorBy Jonathan Hectorhttp://www.embedded.com/23901694?_requestid=49956An in-circuit emulator (ICE) is an invaluable tool for software andhardware developers alik
2008-08-31 15:05:00
704
转载 ICE Technology Unplugged
ICE Technology Unplugged Jack Gansslehttp://www.embedded.com/1999/9910/9910sr.htmReportsof the demise of the ICE are premature. This powerful debugging tool isalive and well, even if it may need m
2008-08-31 15:00:00
907
转载 Beginner's Corner - In-Circuit-Emulators
Beginners Corner - In-Circuit-EmulatorsJack Gansslehttp://www.ganssle.com/index.htmEmbedded systems pose unique debugging challenges. Withneither terminal nor display (in most cases) there’s no nat
2008-08-31 14:46:00
446
转载 The ZEN of BDM
The ZEN of BDMCraig A. HallerMacraigor Systems Inc.This document may be freely disseminated, electronically or in print,provided its total content is maintained,including the original copyright noti
2008-08-31 14:00:00
1211
转载 Reverse Engineering with LD_PRELOAD
--------------------------------------------------- Reverse Engineering with LD_PRELOAD Izik ---------------------------------------------------This paper is about the LD_PRELOAD feature, and ho
2008-08-30 15:55:00
703
转载 Calling Conventions Demystified (Visual C++ calling conventions explained)
Long time no see these tedious 0CCCCCCCCh, "0cch" machine code for int 3, just a way to initialize the stack with int 3 for debug version:)# lea edi,[ebp-0C0h] # mov ecx,30h # mo
2008-08-30 11:41:00
475
转载 likely() and unlikely()
Quote from : http://kernelnewbies.org/FAQ/LikelyUnlikelybvl = bvec_alloc(gfp_mask, nr_iovecs, &idx);if (unlikely(!bvl)) { mempool_free(bio, bio_pool); bio = NULL; goto out;}In fact, these functions
2008-08-30 11:16:00
493
转载 DoWhile0
Why do a lot of #defines in the kernel use do { ... } while(0)? There are a couple of reasons: (from Dave Miller) Empty statements give a warning from the compiler so this is why you see #define FOO
2008-08-29 01:28:00
472
转载 Open Firmware
From Wikipedia, the free encyclopediaOpen Firmware, or OpenBoot in Sun Microsystems parlance, is a standard defining the interfaces of a computer firmware system, formerly endorsed by the IEEE. It ori
2008-08-28 01:19:00
2483
转载 Booting
From Wikipedia, the free encyclopedia In computing, booting (booting up) is a bootstrapping process that starts operating systems when the user turns on a computer system. A boot sequence is the initi
2008-08-28 01:07:00
1218
转载 Power-on self-test
From Wikipedia, the free encyclopediaPower-on self-test (POST) is the common term for a computer, router or printers pre-boot sequence. The same basic sequence is present on all computer architecture
2008-08-28 00:54:00
2742
转载 Flattened Device Tree Blob
Linux kernel expects certain information on the hardware that it runs on. For kernels compiled with ARCH=powerpc,the flattened device tree is the only supported way of booting ARCH=powerpc kernels
2008-08-28 00:03:00
2692
转载 PowerPC
PowerPCPowerPC is a RISC instruction set architecture created by the 1991 Apple–IBM–Motorola alliance, known as AIM. Originally intended for personal computers, PowerPC CPUs have since become popular
2008-08-27 23:43:00
860
转载 A brief overview of the Windows debuggers
A brief overview of the Windows debuggersKD – Kernel debugger. You want to use this to remote debug OSproblems like blue screens. You want it if you develop device drivers. CDB – Command-l
2008-08-27 23:16:00
403
转载 Execute in place
From Wikipedia, the free encyclopedia In computer science, execute in place (XIP) is a method of executing programs directly from long term storage rather than copying it into R
2008-08-27 23:14:00
1230
转载 Classic Texts in Computer Science
Found in google, annotate from http://www.zafar.se/bkz/Articles/ClassicCompScienceTexts. An axiomatic basis for computer programmingC. A. R. Hoare Communicating Sequential Processes (C
2008-01-08 19:45:00
1134
转载 eda江湖传奇
说到IC Design就离不开EDA TOOLS。IC设计中EDA工具的日臻完善已经使工程师完全摆脱了原先手工操作的蒙昧期。IC设计向来就是EDA工具和人脑的结合。随着IC不断向高集成度、高速度、低功耗、高性能发展，没有高可靠性的计算机辅助设计手段，完成设计是不可能的。IC 设计的EDA工具真正起步于80年代，1983年诞生了第一台工作站平台apollo；20年的发展，从硬件描述语言（或是图形输入
2008-01-06 20:17:00
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原创 Board Simulation with SO-DIMM slot
Q: Recently, Im going to layout a board which has a 200 pin SO-DIMM DDR slot, a DDR 333 memory module will be plugged in. Now, I wanna to simulate the data/command/control signals of the DDR trace
2007-11-15 13:06:00
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