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cc3200 launchpad 定时器问题

Other Parts Discussed in Thread: CC3200


void TestTimerConfigNStart()
{
    Timer_IF_Init(PRCM_TIMERA0,TIMERA0_BASE,TIMER_CFG_PERIODIC,TIMER_A,0);

    Timer_IF_IntSetup(TIMERA0_BASE,TIMER_A,TimerPeriodicIntHandler);

    Timer_IF_Start(TIMERA0_BASE,TIMER_A,PERIODIC_TEST_CYCLES / 10);

}

PERIODIC_TEST_CYCLES 值为80000000,  这个的具体定时器时间是多久,怎么计算,这么用cycles