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Program application to LM4F232 using XDS100V2 and Uniflash

Lee Stanton
Prodigy 60 points

Other Parts Discussed in Thread: UNIFLASH

I have an test application for a Stellaris LX4F232H5QD (A3) which toggles an LED on a GPIO line.  I can emulate (Code Composer V5.3, XDS100V2) this successfully and can transfer the .out file successfully to the device using Uniflash V2.1.  When I program the device with Uniflash, the application runs until I remove the XDS100V2.  Can anybody explain what I might be doing wrong?

The connections between the microcontroller and the XDS100V2 are:

1 - TMS (and pulled high to 3V3 with 10k resistor)

2 - !RST

3 - TDI

4,8,10,12 - Ground

5 - 3V3

7 - TDO

11 - TCK  (and pulled high to 3V3 with 10k resistor)

Is there anything else that I need to do in order to get the application to boot the application when powered on?

Any help is much appreciated.

Many Thanks

Lee

  • 0
    Prodigy 60 points

    I've resolved the problem of the program stopping when the XDS100V2 was removed - the !RST was being pulled low.  I still can't get the application to execute.  I've emulated the program with CCS, programmed it with Uniflash and removed the JTAG cable.  However, it doesn't boot when power-cycled.  What am I doing wrong?

    Thanks

    Lee

  • 0 in reply to Lee Stanton
    Intellectual 330 points

    Hi Lee,

    I'm fuzzy remember been in the same situation some weeks ago. I do not know whether this is the answer to your question but check the following:

    The CCS tool chain expands some boot code out of the eabi library. It is linked automatically if your reset starting point is the _c_int00 label. Have a look into the example in the startup_ccs.c file.

    If you do not have it handy, here is the detail:

    extern void _c_int00(void);
    void ResetISR(void)
    {
    __asm("    .global _c_int00\n"
              "    b.w     _c_int00");
    }

    This is doing something mysterious (undocumented) and then branches to your main().

    Hope it helps.

  • 0 in reply to Juergen Gaertner
    Prodigy 60 points

    Hi Juergen

    That works.  I copied startup_ccs.c from the boot_demo1.  I can now load my code on to the device using my XDS100V2.

    Thank you very much.

    Lee