+10
-5
lines changedFilter options
+10
-5
lines changed Original file line number Diff line number Diff line change
@@ -72,10 +72,13 @@
72 72
*/
73 73
#define CCOMPARE_UPDATE_TIMEOUT 1000000
74 74 75 -
/* When changing CCOMPARE, don't allow changes if the difference is less
76 -
* than this. This is to prevent setting CCOMPARE below CCOUNT.
75 +
/* The number of CPU cycles required from obtaining the base ccount to configuring
76 +
the calculated ccompare value. (In order to avoid ccompare being updated to a value
77 +
smaller than the current ccount, this update should be discarded if the next tick
78 +
is too close to this moment, and this value is used to calculate the threshold for
79 +
determining whether or not a skip is required.)
77 80
*/
78 -
#define CCOMPARE_MIN_CYCLES_IN_FUTURE 1000
81 +
#define CCOMPARE_PREPARE_CYCLES_IN_FREQ_UPDATE 60
79 82
#endif // CONFIG_FREERTOS_SYSTICK_USES_CCOUNT
80 83 81 84
/* When light sleep is used, wake this number of microseconds earlier than
@@ -542,15 +545,17 @@ static void IRAM_ATTR do_switch(pm_mode_t new_mode)
542 545
* would happen without the frequency change.
543 546
* Assumes that the new_frequency = old_frequency * s_ccount_mul / s_ccount_div.
544 547
*/
545 -
static void IRAM_ATTR update_ccompare(void)
548 +
static __attribute__((optimize("-O2"))) void IRAM_ATTR update_ccompare(void)
546 549
{
550 +
uint32_t ccompare_min_cycles_in_future = ((s_ccount_div + s_ccount_mul - 1) / s_ccount_mul) * CCOMPARE_PREPARE_CYCLES_IN_FREQ_UPDATE;
547 551
#if CONFIG_PM_UPDATE_CCOMPARE_HLI_WORKAROUND
548 552
/* disable level 4 and below */
549 553
uint32_t irq_status = XTOS_SET_INTLEVEL(XCHAL_DEBUGLEVEL - 2);
550 554
#endif
551 555
uint32_t ccount = esp_cpu_get_cycle_count();
552 556
uint32_t ccompare = XTHAL_GET_CCOMPARE(XT_TIMER_INDEX);
553 -
if ((ccompare - CCOMPARE_MIN_CYCLES_IN_FUTURE) - ccount < UINT32_MAX / 2) {
557 + 558 +
if ((ccompare - ccompare_min_cycles_in_future) - ccount < UINT32_MAX / 2) {
554 559
uint32_t diff = ccompare - ccount;
555 560
uint32_t diff_scaled = (diff * s_ccount_mul + s_ccount_div - 1) / s_ccount_div;
556 561
if (diff_scaled < _xt_tick_divisor) {
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