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Hi Everybody, I am using ULink with uPSD3400. It was working properly and all of a sudden it stops to work and I receive "No JTAG Device Found". I install the new driver version(V2.10), uVision can recognize the device serial number but there is nothing in the JTAG device chain. The leds (at the ulink) are turn on(USB is on, COM and RUN are turn on for half a second when I am connecting the device to the USB port). In addition according to my device manager Ulink is working properly. So, what can be the problem? Thanks Kobi
It looks like there is a problem with the JTAG pins. Are you using a chip variant where the JTAG pins share I/O pins. If so, the user application might program them as I/O pins and in such siutations there is no way to recover the chip using ULINK. Reinhard
Hi, Thanks for your help, but it seems that this is not the problem. I tried to download keil's examples (LedBlink) and I receive the same message "No JTAG Device Found", in addition I can download my FW with ST FlashLink so I thing I have another problem. But what it can be? Thanks Kobi
Hi, It seems that something is wrong with our boards because JTAG is working with the EVAl board. Now the question is what can couse to uVision not to recognize the JTAG device chain(I already worked with our boards and it was working properly). Thanks Kobi
Did you activate security features like 'Sector Protection' or the 'Security Bit' in your PSDsoft project? Please download the LedBlink example with FlashLink and then try to debug it with ULINK. If this works, there is something special in your application which is not supported in ULINK. In this case please send your application (including the PSDsoft or CAPS project) to support.intl@keil.com and we will fix the problem.
Is the JTAG reset on your board connected directly to the uPSD3400 device or is there a reset circuit in between which causes a delay of the reset signal? Are there other devices connected into the JTAG chain? Maybe the device is broken. Can you try with another board?