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CCS/MSP432P401R: Does the debugger fail if the clock is set to 48MHz on the "LaunchPad" dev kit?

James Zweighaft
Prodigy 250 points

Part Number: MSP432P401R

Tool/software: Code Composer Studio

Sure looks like it.  I see the debugger skipping when it should be single stepping, then jumping to random places in the code.  I was sondering why this kit defaults to 3 MHz.

Has anyone else seen this problem?

  • 0
    TI__Expert 8510 points

    James,

     No, the debugger won't fail if the clock is set to 48MHz. It's possible the skipping is due to code optimization, but this wouldn't account for random jumping.  The kit defaults to 3MHz I think largely for historical reasons with other MSP430 examples, and to better illustrate low power operation since you don't need to start the high-frequency oscillator if you're running at 3MHz.  For a known-good high-speed test, I would run the cs_hfxt_start example in the TI Resource Explorer.

    -Bob L.

  • 0 in reply to Bob Landers
    TI__Guru 57716 points

    Per the example Bob has referenced, you cannot simply set the device to operate at 48Mhz.  You need to adjust the core voltage and the flash wait states accordingly.  

        /* Starting HFXT in non-bypass mode without a timeout. Before we start
     * we have to change VCORE to 1 to support the 48MHz frequency */
    MAP_PCM_setCoreVoltageLevel(PCM_VCORE1);
    MAP_FlashCtl_setWaitState(FLASH_BANK0, 1);
    MAP_FlashCtl_setWaitState(FLASH_BANK1, 1);
    CS_startHFXT(false);

    Regards,

    Chris

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