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代码实例
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6 D6 c' |9 B" i5 @/ V" `. |4 q6 n" o- hTimer = TIMER_open(TIMER_DEVANY,0); /* open a timer */
' i7 J! F* v3 n- /* Configure the timer. 1 count corresponds to 4 CPU cycles in C67 */
- /* control period initial value */
- TIMER_configArgs(hTimer, 0x000002C0, 0xFFFFFFFF, 0x00000000);
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- /* Compute the overhead of calling the timer. */
- start = TIMER_getCount(hTimer); /* to remove L1P miss overhead */
- start = TIMER_getCount(hTimer); /* get count */
- stop = TIMER_getCount(hTimer); /* get count */
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- overhead = stop - start;
- start = TIMER_getCount(hTimer); /* get count */
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- /* Call a function here. */
& f9 n8 o5 e" F7 L: J- /* get count */
- diff = (TIMER_getCount(hTimer) – start) ? overhead;
- TIMER_close(hTimer);
- printf(”%d cycles \n”, diff*4);
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注意，C6713上定时器的一个计数值对应4个时钟周期。7 I7 R+ e6 y y# D, M+ z" G! p; g
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overhead表示Timer本身配置过程的时钟消耗，所以有diff计算，
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diff = (TIMER_getCount(hTimer) – start) ? overhead; /* get count */8 {! I& W0 g0 {% q5 ]
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发表于 2019-8-14 09:30
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淘帖
支持！
反对！