Hi, When I using ULINK2 to program LPC2478, the uVision4 showed "no JTAG device found". It was working normal before but failed suddenly at this board. Can anyone help me on this ?
Did anyone meet this kind of fail ? At first I was using the uLink2 on my laptop, and it did work normally. Then I plugged it on my PC, then found it showed "NO JTAG DEVICE FOUND". Now it failed even on my Laptop.
Thank so much.~!
May be the code you programmed on the device is interfering with the JTAG pins/configuration.
Erase the device of your code, use an alternate ISP method, or boot mode, if the device permits such.
If it's an electrical issue, either with the power, connection, oscillators, etc you'll need to break out some equipment and test/diagnose the underlying issue.
Thanks Westonsupermare Pier, Actually I have several boards and now the ulink2 can not detect all of them. I got another good ulink2 and it worked without any issue. I confirmed it is ulink2 problem but i'm really concerning what make it fail. :(
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