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
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hTimer = TIMER_open(TIMER_DEVANY,0); /* open a timer */
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/* Configure the timer. 1 count corresponds to 4 CPU cycles in C67 */
) [% B: C( Y3 D& H9 [& }, k' O/* control period initial value */
TIMER_configArgs(hTimer, 0x000002C0, 0xFFFFFFFF, 0x00000000);

' `/ w/ E" U/ @$ F6 V% D& |9 q! G$ J/* Compute the overhead of calling the timer. */
start = TIMER_getCount(hTimer); /* to remove L1P miss overhead */
" {7 A+ }! B3 j1 Ystart = TIMER_getCount(hTimer); /* get count */
; }2 {7 w( `% s2 W, w7 M, Vstop = TIMER_getCount(hTimer); /* get count */
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  u" w) \0 S8 U' moverhead = stop - start;
6 U1 f! N% h* \0 h$ ^% Y  istart = TIMER_getCount(hTimer); /* get count */
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7 @) O# i9 U! P) E3 v7 c' ?, _" r/ a/* Call a function here. */
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$ k5 @- `+ E2 r# B. p+ Z/* 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。

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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谢谢楼主分享