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

4 O. A! i" a( i, t  x* k! ahTimer = TIMER_open(TIMER_DEVANY,0); /* open a timer */

) n# ^$ }" V) U0 ^7 S9 q/* Configure the timer. 1 count corresponds to 4 CPU cycles in C67 */
- s1 F2 `5 W2 X/* control period initial value */
TIMER_configArgs(hTimer, 0x000002C0, 0xFFFFFFFF, 0x00000000);

% L6 F& k: }4 h/* Compute the overhead of calling the timer. */
start = TIMER_getCount(hTimer); /* to remove L1P miss overhead */
  `4 j: o& z$ cstart = TIMER_getCount(hTimer); /* get count */
stop = TIMER_getCount(hTimer); /* get count */

overhead = stop - start;
! s1 D1 l) U, `; n* }+ p& Cstart = TIMER_getCount(hTimer); /* get count */

# h# M: j$ m, x, x2 F/* Call a function here. */

/* get count */
" D: }: g- p4 M6 z% E4 {2 |diff = (TIMER_getCount(hTimer) – start) ? overhead;
TIMER_close(hTimer);
printf(”%d cycles \n”, diff*4);
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, [+ ~9 Q' d. C) R4 x  w' P5 {

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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