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.
Ihad the same problem with my ulink2 i think that u cant supply the uC from the ulink you need another source of energy i dont know it for sure but i solved it this way.
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. :(
Thanks Mateusz Mazurek. I agree that to try another way :), however, I have to fix my two uLink2 adapter and find out the root cause to avoid the same problem in future.
Is there any Keil expert here ?
I think I have got the root cause. My Laptop is installed with MDK V4.60, my PC was installed with MDK V4.72 (newest version). I think the original firmware of my ulink2 adapter was v1.42.
OK, when I using my laptop(MDK V4.60) with the ulink2 adapter, it was good. Then at the next debug, I was using my PC (MDK V4.72) with the ulink2 adapter, during the debug, the updated uVision program upgraded the firmware of my ulink2 adapter from v1.42 to v2.01, then the adapter failed to detect the JTAG target at both version of uVision (MDK V4.72 & V4.60).
I have downgrade the ulink2 firmware from v2.01 to v1.42, now it worked without any issue with uVision V4.60.
I will not upgrade the uVision anymore...:(
Any Keil folk can explain why ??
Don't the release notes go into this? Keil has direct support contacts, use those.
Hi. I have the same problem. I was working on UVision3 previously. We had no problem with the JTAG. Now i had upgraded to UVision4. The JTAG is working fine with UV4 but it is not able to recognize on UV3. I think when i installed UV4 the drivers got updated for the JTAG. Can anyone tell me how to make it work with UV3.
I tried the suggestion from the release note previously , but nothing help even I configured the ulink2 to boot mode.