T1023WLAN Core not responding error

[WesleyVong]

Hello,

I corrupted the u-boot flash on the t1023wlan board and am trying to re-flash the board using the jtag connector and codewarrior TAP. However, when I try to do so, I repeatedly get "error: T1020: Core not responding". I have tried the default jtag chains as well as a custom chain based on the rcw I recovered from the board when it was working but none of these worked.

[yipingwang]

In your CCS log, there is error at JTAG diagnostics, Error measuring IR length.

If the test fails to measure the length of the instruction register, then an error, Error measuring IR length, is thrown.
The error might be due to one or more of the following reasons:
• TRST stuck low: This may hold the target JTAG logic in reset, preventing any shifts to occur.
• TMS disconnected or stuck: This may prevent the target from making any JTAG state changes.
• TCK disconnected or stuck: This may prevent any state changes or clocking of data.
• TDI disconnected or stuck: This may prevent the test pattern data from getting into the target.
• TDO disconnected or stuck: This may prevent the test pattern data from getting out of the target.
If the test fails, then it is possible that there is a physical connection problem with the JTAG pins, or the JTAG frequency is too high.

Please try whether it is helpful to configure "JTAG clock speed" lower from Run->Debug Configurations-><project>-core00_RAM_T1023_Download->Edit->Connection->JTAG settings.

[WesleyVong · Accepted solution]

Thanks, it turns out the board I was using was broken. I switched it out and it works now!