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MSPM0L1306: How to stop timer counter while CPU execution is halted for debug when a breakpoint is hit in MSPM0L1306

kiran ramesh
Prodigy 50 points
Part Number: MSPM0L1306


Tool/software:

In our Application, based on timer 0 some check condition will be checked every one millisecond. While debugging when breakpoint hit the timer still keeps running due to which timer 0 IRQ is in pending state(Verified in vector table pending bit is set), after stepping immediately timer IRQ is served and the check condition fails due to which MCU reset (Expected Behaviour)

Is there any way to halt timer while debugging

  • 0
    Guru 100565 points

    The idea is to set PDBGCTL:FREE=0. Driverlib provides a function so you can e.g.:

    > DL_Timer_setCoreHaltBehavior(TIMER, DL_TIMER_CORE_HALT_IMMEDIATE); // PDBGCTL:{FREE=0.SOFT=0}

    -------------

    Unsolicited: Poking at this register (TIMG8/12) I observed:

    1) The reset value is shown in TRM (SLAU847D) Table 23-37 as FREE=0,SOFT=0 [in red?], but I saw FREE=1,SOFT=1 as soon as I powered up the timer (PWREN=1).

    2) Setting FREE=0,SOFT=1 (DL_TIMER_CORE_HALT_DELAYED) either (a) didn't stop the timer or (b) took so long (>1ms) that I couldn't tell. Setting FREE=0,SOFT=0 did seem to stop the timer at a breakpoint.

    3) TRM Sec 23.2.10 says this will only work with a TIMA, but it appeared to work (setting aside the oddities above) for TIMG8/12.

    [Edit: I just noticed that I did these experiments on a G3507. I expect that the results would be the same on an L1306.]

  • 0 in reply to Bruce McKenney
    Prodigy 20 points

    Hi Bruce,

    Thanks for reply 
     
    Yes, if we set FREE and SOFT to 0 foir timer peripheral , the debug is halting the timer counter value increment.


    Thanks again.
     

  • 0 in reply to Bruce McKenney
    TI__Mastermind 39775 points

    Thank you bruce.