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Blown micro tests

Alex Lippitt
Prodigy 30 points

Hello Everyone,

I'm working with the LM4F120 Evaluation board and I think I have blown the micro or debugger micro. I was wondering what tests I can perform to make sure this is whats happened. The error messages I get when running a project in CCS is

CORTEX_M4_0: Error connecting to the target

CORTEX_M4_0:Error connecting to the target frequency is out of range

then CCS crashes.

When I try to connect using LM flash programmer I get this error:

**ERROR**: Unable to initialize target - 0!

The background tests I have performed are:

Running a black project in CCS

preforming a hardware reset in LM Flash programmer (I get the same error message as before)

trying to do a debug port unlock (I get the same error message as before)

What i was trying to do:

The program I was running at the time was using 5 timers to perform PWM at 50Hz - 20% duty cycle. The program was running fine when using two timers. I'm almost 100% I haven't shorted anything because I have a wire soldered to a ground connection and using a plug in wire from an arduino kit for the oscilloscope probe. I am still get voltage at all the 3V3 and Vbus pins

I hope you can help me with this problem

Thanks

Alex

  • 0
    Prodigy 10 points

    It works for me for a while then it stops. The error message is the same as above. Did I burn the board? I did not touch it. Doing some search here, there is a suggestion that I should unlock it using LM Flash Programmer. I have tried it, and it does not work. Any help will be appreciated.

    Thanks,

    Hung