求助8230变砖jtag问题

flari***

第一次用Jtag，是按照这位仁兄的帖子一步步做的https://www.right.com.cn/forum/viewthread.php?tid=23396&highlight=8230%2Bjtag但是总是不认cpu,什么原因啊。并口应该是没问题，按照这个方法检测过没问题http://bbs.eeworld.com.cn/viewthread.php?tid=89397&extra=&page=1
线也应该没问题，按照那位仁兄做的，不知什么原因不能Jtag

C:\jtag>jtag -probeonly

==========================================
EJTAG Debrick Utility v2.1.4-Tornado-MOD
==========================================

Probing bus ... Done

Instruction Length set to 5

CPU Chip ID: 00000000000000000000000000000000 (00000000)
*** Unknown or NO CPU Chip ID Detected ***

*** Possible Causes:
    1) Device is not Connected.
    2) Device is not Powered On.
    3) Improper JTAG Cable.
    4) Unrecognized CPU Chip ID.

xgg5***

没接好线。。

xcb***

思考了

yy5***

楼主仔细看一下论坛的有关8230的其他帖子，记得这个的JTAG做法好像不同于一般，JTAG软件建议使用BRJTAG 1.8C，本论坛有下载！！！

flari***

谢谢各位，确实是线接的有问题，去掉牛角插坐，改成杜邦头就好了。但是新问题又出来了，flash不认。flash是MX29LV320ABTC-90,强制加/fc:32也没用，都说Read On Error

Probing bus ... Done

Instruction Length set to 8

CPU assumed running under LITTLE endian

CPU Chip ID: 00000100011100000100000101111111 (0470417F)
*** Found a Broadcom manufactured BCM4704 REV 01 CPU ***

    - EJTAG IMPCODE ....... : 00000000100000000000100100000100 (00800904)
    - EJTAG Version ....... : 1 or 2.0
    - EJTAG DMA Support ... : Yes
    - EJTAG Implementation flags: R4k MIPS32

Issuing Processor / Peripheral Reset ... Done
Enabling Memory Writes ... Done
Halting Processor ... <rocessor did NOT enter Debug Mode!> ... Done
Clearing Watchdog ... Done
Loading CPU Configuration Code ... Skipped

Probing Flash at Address: 0x1FC00000 ...
DMA Read(h) Addr = 1fc00000  Data = (00000000)ERROR ON READ
DMA Read(h) Addr = 1fc00002  Data = (00000000)ERROR ON READ
Detected Chip ID (VenIDevID = 00FF : FFFF)
DMA Read(h) Addr = 1fc00020  Data = (00000000)ERROR ON READ
DMA Read(h) Addr = 1fc00022  Data = (00000000)ERROR ON READ
DMA Read(h) Addr = 1fc00024  Data = (00000000)ERROR ON READ
DMA Read(h) Addr = 1fc00020  Data = (00000000)ERROR ON READ
DMA Read(h) Addr = 1fc00022  Data = (00000000)ERROR ON READ
DMA Read(h) Addr = 1fc00024  Data = (00000000)ERROR ON READ
DMA Read(h) Addr = 1fc00020  Data = (00000000)ERROR ON READ
DMA Read(h) Addr = 1fc00022  Data = (00000000)ERROR ON READ
DMA Read(h) Addr = 1fc00024  Data = (00000000)ERROR ON READ
DMA Read(h) Addr = 1fc00020  Data = (00000000)ERROR ON READ

xgg5***

Probing Flash at Address: 0x1FC00000 ...
常见问题。。
备份CFE，然后清除WHOLEFLASH，再刷CFE就好。。
如果不行，就检查焊接，再不行就换个FLASH

flari***

6,8,10地线全接上就好了，谢谢各位帮忙

xgg5***

2468全是联通的，，
呵呵，估计老兄的地线之前没有联好。。。

hu***

yy5***

你只有用BRJTAG 1.8C才可以加/fc:32 （ MX29LV320AB/BB 2Mx16 BotB  (4MB)）的强刷参数。

flari***

谢谢，现在正在刷wholeflash,失败应该单刷cfe估计得刷一夜了