TIMER_B - cannot set the number of clock cycles

Hristo Nankov

Other Parts Discussed in Thread: CC3200

Hello,

i setup 2 timers on this way:

Timer_IF_Init(PRCM_TIMERA2, TIMERA2_BASE, (TIMER_CFG_SPLIT_PAIR | TIMER_CFG_A_PERIODIC | TIMER_CFG_B_PERIODIC), TIMER_BOTH, 0);
Timer_IF_IntSetup(TIMERA2_BASE, TIMER_A, ATimerHandler);
Timer_IF_IntSetup(TIMERA2_BASE, TIMER_B, BTimerHandler);

and then start timer_b

Timer_IF_Start(TIMERA2_BASE, TIMER_B, 80000000);

I expect that the timer interrupt every second but it makes it much offter.
No matter how many cicles I set, the timer runs always with the same speed.

what should I do to change that?

over 10 years ago

0 Praveen Kumar N over 10 years ago

TI__Expert 6700 points

Hi,

I will check this and get back to you.

Thanks and Regards,

Praveen

0 Hristo Nankov over 10 years ago in reply to Praveen Kumar N

Prodigy 30 points

Hello Praveen,

is there something new about this problem?

Thanks and Regards,

Hristo

0 Praveen Kumar N over 10 years ago in reply to Hristo Nankov

TI__Expert 6700 points

Hi Hristo,

Apologies for delayed response.

You are using the TIMERA2 in 'split pair' mode in which case it is split into two 16-bit independent timers.

Since the timers are running at 80 MHz, it would requires a count value of 80000000 to generate one interrupt per second. But a 16-bit timer can only count up to 65535.

Please use the timer in 32-bit mode and try. Let me know if that resolves the issue.

If you want more than one timer CC3200 has 4 General Purpose Timer modules.

Thanks and Regards,
Praveen

0 Praveen Kumar N over 10 years ago in reply to Praveen Kumar N

TI__Expert 6700 points

Hi,

Is this issue now resolved? If so, please click the Verify Answer button to close the thread.

Thanks and Regards,
Praveen

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TIMER_B - cannot set the number of clock cycles