Category Archives: AVR / Embedded

AVR / Embedded

죽은 NETIS WF2480 살려내기

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펌웨어 업데이트하다가 WF2480이 죽(였)었다.
손쉽게 사용자가 debrick 할 수 있는데 서비스 센터에서는 자꾸 입고시키란다.(택배비 무료로!)
그것마저도 귀찮았기에 웹좀 돌아보니 TFTP로 손쉽게 복구시킬 수 있는 방법이 있었다.

먼저 정식펌웨어를 보면 aa요롷케 WF2480이라고 헤더가 7자리 차지하고있다(0x0A까지)
이거 날려서 원본펌웨어를 준비한다.  (dd if=./WF2480_v1.6.23.bin of=./fw.bin bs=1 skip=7)

다음은 벽돌된 장비를 리셋버튼을 누르고(?) 또는 부팅중 열라 눌러주면 아무런 반응이 없다.
내부적으로는 어떤 모드 (<RealTek> 이란 쉘이뜨는) 에 진입하는데 반응이 없다.
이 상태에서 랜선으로 컴퓨터랑 연결해주고 컴퓨터에서 ip 대충잡고 게이트웨이 192.168.1.6으로 잡아준다.
이후 (atftp -p -l fw.bin 192.168.1.6) 이런식으로 파일을 올려주면 아래와 같이 알아서 롬질하고 재부팅까지 해준다. DONE.

AVR / Embedded

아이노트 블루투스 스피커 BT-S15

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아이노트 블루투스 스피커 BT-S15 는 모노 스피커이다…
RDA5851S 칩을 사용하고있으며 데이터 싵으는 여기
나는 열심히 프로브로 찍어서 RL찾아냄;

남아굴러다니는 스피커에 블루투스 심어줄려고 했으나 실패
(뭔가 전원으로 스피커에서 나온 12v 넣어줬는데 보드 사망… 아 12v였구나 …;)

http://www.rdaic.com/sites/default/files/public/RDA5851_Chip_Datasheet.pdf

b

사용후기 : 화이트 노이즈가 좀 있지만 가격이 다 용서해줌.. 저항좀 물리면 잠잠해질려나?

AVR / Embedded

iPhone non official SDK aka ToolChain finally setup

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iPhone non official SDK aka ToolChain finally setup

Woo.. after doing the process almost ten times, downloading the fullxodetools.dmg(~924mb) i finally have the iPhone toolchain working.. ihave setup the non official iPhone SDK ,, untill the official by Applecomes out in Feb’08 .
Start developing native iPhone apps today, no more web 2.0…
There are many guides out there, i am just telling my expierience, hope it works for you..
It uses the GC++, GCC compiler in linux..
I used Fedore 7 on VMware(virtual machine, you can grab both of them for free) to build the toolchain. I recomd.linux for good performance..
Content from –http://code.google.com/p/iphone-dev/wiki/Building,with my tips inBOLD.

HOWTO build the toolchain
Run terminal…

  • Ensure that you have a copy ofbisonandflexinstalled on your system. All major systems should have these tools installed or available in package management systems.Most linux flavours have the packages, you can skip this..

  • Check out a copy of LLVMSVN, and build areleasebuild (as opposed to a debug one). Currently, due toIssue 70, we are limited to revision 42498.it will take some time while files are being downloaded to your PC from internet, probably no errors here

  • Check out a copy of the iphone-dev SVN repository.(it will take large amount of time, the longest step of all)

  • Make a directory to hold the toolchain.

  • Build odcctools. (you will get some error if you are using CYGWIN on windows here, refer to there site for details)

  • Geta copy of the iPhone root filesystem. This is usually obtained bydecrypting and extracting the iPhone restore software usingthese tools, but there are many other methods to obtain this, including simply usingscpto download all the files from the iPhone over Wi-Fi. (Scroll below for a download link of ready to use iPhone 1.0.2 image) Unpack the root filesystem somewhere, and set the environment variable$HEAVENLYto its path. (set this again if you restart system or terminal)

  • Install the iPhone headers to the appropriate place. If you aren’t on Mac OS X, replace the/Developer/SDKs/MacOSX10.4u.sdkpath with the full path to the unpacked Mac OS X 10.4 Universal SDK(ie.MacOSX10.4u.sdk). If you don’t have a copy of this,scroll below..

  • Install csu, which includescrt1.o,dylib1.o, andbundle1.o.Don’t rebuild them from source, as this requires a working cross-GCC,which you don’t have yet (and the build-from-source process for csu isbroken right now anyway). Binaries are provided for this reason.

  • Onlyif you are compiling onleopard10.5. This is an ugly workaround and compiling with the resulting toolchain will give you a warning.

  • Configure and make LLVM-GCC. Make sure that$LLVMOBJDIRand$HEAVENLYare set per the instructions above.(igot the errors like error 1, error 2 more than 5 times, i solved thisproblem by changing lots of files,symlinks in /usr/lib folder of iphoneimage hence i have uploaded my modified working iphone image. see belowfor errors).

You’re done. Have fun!

Gotchas

  • Makesure that there are no spaces in any of the directory names that youuse. GCC does not build if there are spaces in the directory names, andthe shell scripts will not work. This is most often a problem onWindows.
  • Make sure that/usr/local/binis in yourPATH.This is not the case out of the box on Mac OS X, although chances areif you’ve installed things from source before you’ve added it already.
  • If LLVM failed to compile because of missingbisonand/orflex(evidence that this was the case is a failed compile onutils/TableGen/FileLexer.l), you mustmake cleananddeleteutils/TableGen/FileParser.hbefore trying again withbisonandflexinstalled. LLVM’smake cleanscript does not always properly clean up after a failed build.
  • Make sure that$HEAVENLYpoints to a copy of the full iPhone root filesystem, not just theunpacked update DMG. If you get errors about being unable to find-lc, then your$HEAVENLYis set incorrectly, you mistyped the--with-heavenlyoption toconfigure, or your copy of the root partition is incomplete. Your copy of the iPhone root filesystemmustinclude ausr/lib/libc.dylibfile.

HOWTO obtain the Mac OS X headers on Linux or Windows

=Install thecpioutility using your distribution’s standard package management system.All the major Linux distributions, as well as Cygwin, should have thisutility.
=No needtodownload the whole xcode tools dmg (~924mb). I extracted thepackage,uploaded it for you :), download the needed file from here-http://rapidshare.com/files/66764258/MacOSX10.4u.sdk.rar
=Extract RAR, then thepaxarchive by creating a new dir and using the following command in terminal

=FindMacOSX10.4u.sdkfolder in extracted contents and link it toolchain install procedure.

—LOGIN as root to avoid weird errors, password prompts again and again..

–The envirnoment variables should be set properly to check there use this command in terminal- echo $VARIABLENAME, eg. –echo $HEAVENLYif it returns blank line set it again. the envirno. variable has aliftime till the terminal runs, if you close it, you have to set itagain

— errors i got ,when i do"make LLVM_VERSION_INFO=2.0-svn-iphone-dev-0.3-svn" its runs for a long time and then results in this error */usr/local/bin/arm-apple-darwin-ld:/home/Aakash/iphone/iphone-image/usr/lib/libc.dylib truncated ormalformed object (mach header extends past the end of the file)collect2: ld returned 1 exit status make2 [libgcc_s.dylib] Error 1make2 Leaving directory/root/iphone-dev/build/llvm-gcc-4.0-iphone/gcc' make1 [stmp-multilib]Error 2 make1: Leaving directory/root/iphone-dev/build/llvm-gcc-4.0-iphone/gcc' make: [all-gcc] Error 2*
i did this to get off the error"openall .dylib files (<=1 k) one by one in folder/iphone-image/usr/lib/, rename it – and for example libc.dylib showspath to libSystem and libSystem – path to libSystem.B.dylib. Just copylibSystem.B.dylib twice and rename 2 new files to libc.dylib andlibSystem.dylib. do this for all <=1kb .dylib files".
The iPhone image i uploaded here contains these changes, no need to do again.

Passwordfor all my rapidshare uploadsif neededin this post isaksblog.co.nr

Usefull links-

Post toolchain install–

Need any help, post as comment…

AVR / Embedded

AVR 입문,

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사용자 삽입 이미지

사용자 삽입 이미지


 

 

  후후 이제 시작이다!

이쪽은 돈이 조금(?) 많이 드는걸 빼고는 다 좋은데 ,,

돈이 문제다 ,,

 

저 위에 키트 새거로 사면 20만원이다

이런 이유때문에 포기하고있었는데

옥션에서 중고로 5만원에 팔길래 바로 질렀다 (그분 강림)

처음에는 아무거도 모르겠던데

지금도 모르겟다(조금은 알겠더라)

 

베타키트 상세스펙(지금은 단종되고 베타키트 ver2로 조금 바껴서 나온다)

 

① AT89S52와 ATmega8515는 기존의 ISP를 이용해서 다른
  장비 없이 사용자가 직접 내부 플래쉬 메모리에 프로그램을
  입력할수 있습니다.(롬 라이터 불필요)
② LED와 캐릭터 LCD ,Buzzer(피에조), 딥스위치, FND (SND3360)를
  직접제어해 볼 수 있고,외부 인터럽트 INT0, INT1 스위치로
  인터럽트 제어를 할 수 있습니다.
③ 26핀의 확장핀이 제공되기에 나중에 사용자가 직접 확장보드를
  만들어서 추가시킬 수도 있고, 마시테크에서 추가로 제공되는
  확장보드를 구매해서 또 다른 기능을 쉽게 추가시킬 수 있습니다.
④ 시리얼 포트를 통해서 시리얼 통신이 가능합니다.

 

① Size : 115 X 120 (mm)
② CPU : AT89S52, ATMEGA8515(AVR)
③ Clock : 22.1184 MHz (8051 용),16 MHz (AVR 용)
④ 스위치 & 키 : DIP 스위치 (4 sw), Reset Key, int Key x 2
⑤ 출력 장치 : 캐릭터 LCD 연결 가능, SND 3360, LED(green-3mm X 8),
   PIEZO(부저)
⑥ 시리얼 통신 : RS232 통신 케이블 사용
  (통신 속도 – 38400 bps : 기본 설정)
⑦ ISP 기능 : 자체 제작한 ISP 프로그램으로 AT89S52 및 ATMEGA8515
  라이트 가능

 

 

이게 뭐냐면

 

그냥 아주 구린 컴퓨터라 보면 되겠다

(컴퓨터다 CPU 잇고 메모리 있고 있을건 다있다)

 

어디쓰냐고?

 

글쎄 ,,