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Dear Forum members,
I have purchased Keil ULIN2 adapter yesterday. I am facing problem JTAG COMMUNICATION FAILURE When I am trying to flash download or erase.
I have tried with different clock settings 50, 100,200,500, and RTCK. But same problem remaining... :-(
Could any keil ARM experts help me to fix this problem.
Thanks & Regards lazaf
1. try turning off caching. 2. maybe you connected the JTAG connector inverted? if you are sure it is alright as it is, do nothing as it might burn it! 3. if the ULINK information displayed in the GUI? 4. have you tried the RTCK speed option (even though it should not make a difference in this case...) ?
No success with turning off cache options.
JTAG is connected correctly.
ULINK2 informations displaying on GUI. There is a error message aganist TDO-> JTAG communication failure.
I have tried with RTCK spped option. It is also not helps... :-(
I want test where is the problem is? I mean my board JTAG or ULINK2?
Is there is any self test feature for KEIL ULINK2?
Can any ULINK2 users give me the signal levels of the ULINK2 and Target board JTAG pins?
if the small cable between the ULINK and the target board is slightly damaged, you cane expect this behavior...(speaking from experience!)
Hi, 1. I also had communication failures caused by a damaged JTAG cable.
2. Do you have another hardware to test the debugger with? Maybe an evaluation board of the same or another controller?
3. What happens, when you try to debug (not flashing) e.g. an example project?
4. Go to "target options" -> "Debug" select ULINK ARM Debugger and click "settings". Does the debugger recognise a device? Is the ID code equal to the ID you expect (see datasheet of controller)?
1) I have tested the small JTAG cable and found correct.
2) I tried with another one Eval board (Which is working fine with IAR JLIN and IAR tool), Now i am facing the error "No JTAG device found"
Which version of uVision are you using? (3.xx or 4.?)
What kind of ARM MCU are you using? (Cortex or ARM7/9?)
Does your Eval board provide a configuration procedure for ULink2?
It is woking fine now. Problem was on my board.
Thanks for ur suggestions.