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Re: ERROR >> JTAG IR scan test failed

Started by yang...@163.com May 22, 2008
Hello Everyone
>I have a problem about reflashing my device, I was trying to write a flash driver sw for our hw platform. I have erased the contents of the flash(bootloader) and I was not able to reflash it again using JTAG emulation or whatsoever.
>
>SD config output is like this :
>
>** Emulator Test **
> $$ EmuProductName=XDS510USB
> $$ EmuPortAddr=0x510
> $$ EmuPortMode=USB
> $$ ProductIdQ0
> $$ ProductVersion
> ** Emulator Scan Test
>
>ERROR > > JTAG IR scan test failed
>
>do you know how canI fix this, which seems to be a quite serious problem? Any Help is appriciated thnx.
I have the same problem.What's the mean "the JTAG chain includes both DSP and a Flash device ",and how to slove?
yangxj_xidian,

On Wed, May 21, 2008 at 8:52 PM, wrote:
> Hello Everyone
>>I have a problem about reflashing my device, I was trying to write a flash
>> driver sw for our hw platform. I have erased the contents of the
>> flash(bootloader) and I was not able to reflash it again using JTAG
>> emulation or whatsoever.
>>
>>SD config output is like this :
>>
>>** Emulator Test **
>> $$ EmuProductName=XDS510USB
>> $$ EmuPortAddr=0x510
>> $$ EmuPortMode=USB
>> $$ ProductIdQ0
>> $$ ProductVersion
>> ** Emulator Scan Test
>>
>>ERROR > > JTAG IR scan test failed
>>
>>do you know how canI fix this, which seems to be a quite serious problem?
>> Any Help is appriciated thnx.
> I have the same problem.What's the mean "the JTAG chain includes both DSP
> and a Flash device ",and how to slove?

The JTAG scan path is supposed to be a complete loop [it can be many devices].

emulator------>deviceA------>deviceB------>emulator

I am not familiar with SD emulators, but I suspect that 'JTAG IR scan
test failed' indicates that the data sent by the emulator never
returned.

The message "the JTAG chain includes both DSP and a Flash device "
indicates that there are 2 devices in your scan chain [or that you
have a c672x DSP. This leads to a couple of questions...
1. What DSP are you using??
2. What is the version of CCS??
3. What target board do you have?? [purchased or custom]

mikedunn

--
www.dsprelated.com/blogs-1/nf/Mike_Dunn.php