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LPCXpresso JTAG error on LPC2212

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LPCXpresso JTAG error on LPC2212

‎06-15-2016 12:49 PM
680 Views
lpcware
NXP Employee
NXP Employee
Content originally posted in LPCWare by leojose on Fri Nov 22 06:07:29 MST 2013
I am trying to debug an LPC2212 board using LPCLink, but I get a JTAG error complaining that it is unable to find 'IR Length' . I have attached a snapshot of the error.

Meanwhile, I have successfully managed to debug an LPC2478 & LPC2148 board using LPCLink where it was able to detect the JTAG chain as shown in the attachment.

Can somebody help me decode the meaning of this error and how to go about fixing it?
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‎06-15-2016 12:49 PM
673 Views
lpcware
NXP Employee
NXP Employee
Content originally posted in LPCWare by lpcxpresso-support on Fri Nov 22 06:51:31 MST 2013
This error is normally caused by either:
- your JTAG is not wired up correctly (most likely)
- the MCU has got into a non debuggable state.

These FAQs may help you:
http://www.lpcware.com/content/faq/lpcxpresso/debug-design
http://www.lpcware.com/content/faq/lpcxpresso/regaining-debug-access
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