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No jtag device found after program download (LPC2378)

Hello,

I use uVision V3.50 and the evaluation board MCB2300 (Keil) with an LPC2378.
I have compiled some of the code examples and was able to download them to flash via JTAG using ULINK adapter.
After I had downloaded a selfwritten program, I am not able to download anything anymore. I get a popup saying "No JTAG devices found".

Does anyone have any idea how this can be solved?

Parents
  • Thanks for the suggestion, but I have already tried using FlashMagic (3.48.195), even with a brandnew board that just came out of the box, without any result.
    I have removed jumpers J4 and J13, boot the board, but when I try to read the device signature (with the advanced hardware option 'Use DTR and RTS...' enabled), I get an error saying: Operation failed (reading signature).
    What is the problem here, and how can it be resolved?

Reply
  • Thanks for the suggestion, but I have already tried using FlashMagic (3.48.195), even with a brandnew board that just came out of the box, without any result.
    I have removed jumpers J4 and J13, boot the board, but when I try to read the device signature (with the advanced hardware option 'Use DTR and RTS...' enabled), I get an error saying: Operation failed (reading signature).
    What is the problem here, and how can it be resolved?

Children