gonzui

mtkernel_3

lib/libtk/sysdepend/cpu/core/armv7a/wusec_armv7a.c - 2.1KB - 72 lines

30:         period = (((usec)*COUNT_PER_SEC)/1000000LL);   /* Number of wait counts */
31:         max    = in_w(OSTM0_CMP);                 /* Timer count cycle */
32:         if (period >= max) return;                     /* ERROR: Undetectable */
33: 
34:         start  = in_w(OSTM0_CNT);               /* Count value at the start of waiting */
35:         if (start > period) {
41:                 while (1) {           /* Waiting for underflow */
42:                         cur = in_w(OSTM0_CNT);
43:                         if (cur > prev) break;
48:         do {
49:                 cur = in_w(OSTM0_CNT);
50:         } while (!((cur <= end) || (cur > start)));