mao1234 发表于 2011-2-23 18:26:35

jtag时出现下面的错误是芯片坏了吗？

Probing bus ... Done
Instruction Length set to 5
CPU Chip ID: 00000110001101011000000101111111 (0635817F)
*** Found a Broadcom BCM6358 Rev 1 CPU chip ***
    - EJTAG IMPCODE ....... : 00000000100000011000100100000100 (00818904)
    - EJTAG Version ....... : 1 or 2.0
    - EJTAG DMA Support ... : Yes
    - EJTAG Implementation flags: R4k MIPS16 MIPS32
Issuing Processor / Peripheral Reset ... Done
Enabling Memory Writes ... Skipped
Halting Processor ... <Processor did NOT enter Debug Mode!> ... Done
Clearing Watchdog ... Done
Probing Flash at (Flash Window: 0x1e000000) ... DMA Read Addr = 1e000000Data = (00000000)ERROR ON READ
DMA Read Addr = 1e000002Data = (00000000)ERROR ON READ
DMA Read Addr = 1e000020Data = (00000000)ERROR ON READ
DMA Read Addr = 1e000022Data = (00000000)ERROR ON READ
DMA Read Addr = 1e000024Data = (00000000)ERROR ON READ
Done
*** Unknown or NO Flash Chip Detected ***
*** REQUESTED OPERATION IS COMPLETE ***

jec123456 发表于 2011-2-23 18:59:36

Unknown or NO Flash Chip Detected

81012004 发表于 2011-2-23 20:54:20

这个不能说明是芯片坏了吧~

mao1234 发表于 2011-2-23 23:25:32

刚开始没有这种情况的，就是写入CFE的时候老是不固定的卡死。有时是4%，有时是7%。我擦写了几次就开始出现这个情况。

sxg0930 发表于 2011-3-31 22:25:56

hugebird 发表于 2011-3-31 23:33:00

Halting Processor ... <Processor did NOT enter Debug Mode!> ... Done
关键在这里，没有进入DEBUG模式，
把软件里面的说明仔细看明白。
调整执行brjtag和给adsl加电的间隔，0.5s需要严格执行。另外还有个oe接地的办法

tiansha200 发表于 2011-4-1 09:41:20

另外可能也是JTAG线长了。。线材差的 最好 15CM
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