在DSP671x上使用Timer统计信号处理算法的时间消耗

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在DSP671x上使用Timer统计信号处理算法的时间消耗
代码实例
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hTimer = TIMER_open(TIMER_DEVANY,0); /* open a timer */

/* Configure the timer. 1 count corresponds to 4 CPU cycles in C67 */
0 }/ A' L* J6 |5 a/* control period initial value */
& O4 {+ ~% E* w7 Y$ wTIMER_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 */
; h0 ]) v: Y# _9 kstop = TIMER_getCount(hTimer); /* get count */
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1 L0 n9 x( a# b+ w  j0 e% z; x$ C) Y2 zoverhead = stop - start;
start = TIMER_getCount(hTimer); /* get count */
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7 k; ^5 Y* [$ g, m5 K( Z/* Call a function here. */
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/* get count */
6 h/ O) d+ p% |  adiff = (TIMER_getCount(hTimer) – start) ? overhead;
TIMER_close(hTimer);
! D/ I* J$ q8 t( N  |7 \5 pprintf(”%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。

overhead表示Timer本身配置过程的时钟消耗，所以有diff计算，

diff = (TIMER_getCount(hTimer) – start) ? overhead；

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