C6747 how to reset timer

theo_chen

i use external clock source to drive timer1:2. i want to konw how to reset my timer and clear the count value in TIM12 in active status.

in which situation that i can write TIM12? how to make sure whether TIM12 or PRD12 is changed?

over 13 years ago

0 theo_chen over 13 years ago

Prodigy 40 points

my reset code is below,is this right?

CSL_FINST(tmr0Regs->TCR,TMR_TCR_ENAMODE12,DISABLE);

tmr0Regs->TGCR = CSL_FMKT(TMR_TGCR_TIM12RS,RESET);
  CSL_FINST(tmr0Regs->TGCR, TMR_TGCR_PLUSEN, DISABLE);
CSL_FINS(tmr0Regs->PRD12,TMR_PRD12_PRD12,0x10);
   CSL_FINST(tmr0Regs->TIM12,TMR_TIM12_TIM12,RESETVAL);

    /* Select 32 bit unchained mode */
    /* Take the timer out of reset */
   tmr0Regs->TGCR = CSL_FMKT(TMR_TGCR_TIMMODE,32BIT_UNCHAIN)
                                      | CSL_FMKT(TMR_TGCR_TIM12RS,NO_RESET);

    // in contious and reload mode select the number to reload
    CSL_FINST(tmr0Regs->TGCR, TMR_TGCR_PLUSEN, ENABLE);
    CSL_FINST(tmr0Regs->TCR,TMR_TCR_ENAMODE12,EN_CONTRELOAD); // contious and reload mode

0 RandyP over 13 years ago in reply to theo_chen

TI__Guru* 84110 points

Theo Chen,

Please review the 64-Bit Timer User's Guide Section 2.1.5.2 "Writing to Registers of an Active Timer".

That section states which registers may not be written during active timer operation. If you wish to change any of those timer registers during active operation, you must stop the timer, write to them as needed, and then resume the timer counting.

Regards,
RandyP

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C6747 how to reset timer