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systimer: optimise esp_timer_get_time

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This commit is contained in:
morris 2021-04-25 19:38:01 +08:00
parent 3f7b637a15
commit 988c88a6b1
5 changed files with 17 additions and 18 deletions
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2
components/esp_timer/src/esp_timer_impl_systimer.c
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@ -75,7 +75,7 @@ int64_t IRAM_ATTR esp_timer_impl_get_time(void)
if (unlikely(s_alarm_handler == NULL)) {
return 0;
}
return systimer_hal_get_time(&systimer_hal, SYSTIMER_LL_COUNTER_CLOCK);
return systimer_hal_get_counter_value(&systimer_hal, SYSTIMER_LL_COUNTER_CLOCK) / SYSTIMER_LL_TICKS_PER_US;
}
int64_t esp_timer_get_time(void) __attribute__((alias("esp_timer_impl_get_time")));

2
components/hal/esp32c3/include/hal/systimer_ll.h
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@ -23,6 +23,8 @@
#define SYSTIMER_LL_ALARM_OS_TICK_CORE0 (0) // Alarm used for OS tick of CPU core 0
#define SYSTIMER_LL_ALARM_CLOCK (2) // Alarm used for "wallclock" time
#define SYSTIMER_LL_TICKS_PER_US (16) // 16 systimer ticks == 1us
#ifdef __cplusplus
extern "C" {
#endif

2
components/hal/esp32s2/include/hal/systimer_ll.h
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@ -21,6 +21,8 @@
#define SYSTIMER_LL_COUNTER_CLOCK (0) // Counter used for "wallclock" time
#define SYSTIMER_LL_ALARM_CLOCK (2) // Alarm used for "wallclock" time
#define SYSTIMER_LL_TICKS_PER_US (80) // 80 systimer ticks == 1us
#ifdef __cplusplus
extern "C" {
#endif

2
components/hal/esp32s3/include/hal/systimer_ll.h
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@ -24,6 +24,8 @@
#define SYSTIMER_LL_ALARM_OS_TICK_CORE1 (1) // Alarm used for OS tick of CPU core 1
#define SYSTIMER_LL_ALARM_CLOCK (2) // Alarm used for "wallclock" time
#define SYSTIMER_LL_TICKS_PER_US (16) // 16 systimer ticks == 1us
#ifdef __cplusplus
extern "C" {
#endif

27
components/hal/systimer_hal.c
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@ -19,13 +19,6 @@
#include "hal/systimer_types.h"
#include "hal/clk_gate_ll.h"
// Number of timer ticks per microsecond
#if SOC_SYSTIMER_FIXED_TICKS_US
#define SYSTIMER_TICKS_PER_US (SOC_SYSTIMER_FIXED_TICKS_US)
#else
#define SYSTIMER_TICKS_PER_US (80)
#endif
void systimer_hal_init(systimer_hal_context_t *hal)
{
hal->dev = &SYSTIMER;
@ -61,13 +54,13 @@ uint64_t systimer_hal_get_counter_value(systimer_hal_context_t *hal, uint32_t co
uint64_t systimer_hal_get_time(systimer_hal_context_t *hal, uint32_t counter_id)
{
return systimer_hal_get_counter_value(hal, counter_id) / SYSTIMER_TICKS_PER_US;
return systimer_hal_get_counter_value(hal, counter_id) / SYSTIMER_LL_TICKS_PER_US;
}
#if SOC_SYSTIMER_ALARM_MISS_COMPENSATE
void systimer_hal_set_alarm_target(systimer_hal_context_t *hal, uint32_t alarm_id, uint64_t target)
{
systimer_counter_value_t alarm = { .val = target * SYSTIMER_TICKS_PER_US};
systimer_counter_value_t alarm = { .val = target * SYSTIMER_LL_TICKS_PER_US};
systimer_ll_enable_alarm(hal->dev, alarm_id, false);
systimer_ll_set_alarm_target(hal->dev, alarm_id, alarm.val);
systimer_ll_apply_alarm_value(hal->dev, alarm_id);
@ -76,9 +69,9 @@ void systimer_hal_set_alarm_target(systimer_hal_context_t *hal, uint32_t alarm_i
#else
void systimer_hal_set_alarm_target(systimer_hal_context_t *hal, uint32_t alarm_id, uint64_t timestamp)
{
int64_t offset = SYSTIMER_TICKS_PER_US * 2;
int64_t offset = SYSTIMER_LL_TICKS_PER_US * 2;
uint64_t now_time = systimer_hal_get_counter_value(hal, 0);
systimer_counter_value_t alarm = { .val = MAX(timestamp * SYSTIMER_TICKS_PER_US, now_time + offset) };
systimer_counter_value_t alarm = { .val = MAX(timestamp * SYSTIMER_LL_TICKS_PER_US, now_time + offset) };
do {
systimer_ll_enable_alarm(hal->dev, alarm_id, false);
systimer_ll_set_alarm_target(hal->dev, alarm_id, alarm.val);
@ -87,7 +80,7 @@ void systimer_hal_set_alarm_target(systimer_hal_context_t *hal, uint32_t alarm_i
int64_t delta = (int64_t)alarm.val - (int64_t)now_time;
if (delta <= 0 && !systimer_ll_is_alarm_int_fired(hal->dev, alarm_id)) {
// new alarm is less than the counter and the interrupt flag is not set
offset += -1 * delta + SYSTIMER_TICKS_PER_US * 2;
offset += -1 * delta + SYSTIMER_LL_TICKS_PER_US * 2;
alarm.val = now_time + offset;
} else {
// finish if either (alarm > counter) or the interrupt flag is already set.
@ -100,7 +93,7 @@ void systimer_hal_set_alarm_target(systimer_hal_context_t *hal, uint32_t alarm_i
void systimer_hal_set_alarm_period(systimer_hal_context_t *hal, uint32_t alarm_id, uint32_t period)
{
systimer_ll_enable_alarm(hal->dev, alarm_id, false);
systimer_ll_set_alarm_period(hal->dev, alarm_id, period * SYSTIMER_TICKS_PER_US);
systimer_ll_set_alarm_period(hal->dev, alarm_id, period * SYSTIMER_LL_TICKS_PER_US);
systimer_ll_apply_alarm_value(hal->dev, alarm_id);
systimer_ll_enable_alarm(hal->dev, alarm_id, true);
}
@ -117,7 +110,7 @@ void systimer_hal_enable_alarm_int(systimer_hal_context_t *hal, uint32_t alarm_i
void systimer_hal_counter_value_advance(systimer_hal_context_t *hal, uint32_t counter_id, int64_t time_us)
{
systimer_counter_value_t new_count = { .val = systimer_hal_get_counter_value(hal, counter_id) + time_us * SYSTIMER_TICKS_PER_US };
systimer_counter_value_t new_count = { .val = systimer_hal_get_counter_value(hal, counter_id) + time_us * SYSTIMER_LL_TICKS_PER_US };
systimer_ll_set_counter_value(hal->dev, counter_id, new_count.val);
systimer_ll_apply_counter_value(hal->dev, counter_id);
}
@ -180,9 +173,9 @@ void systimer_hal_on_apb_freq_update(systimer_hal_context_t *hal, uint32_t apb_t
* If this was called when switching APB clock to XTAL, need to adjust
* XTAL_STEP value accordingly.
*/
if (apb_ticks_per_us != SYSTIMER_TICKS_PER_US) {
assert((SYSTIMER_TICKS_PER_US % apb_ticks_per_us) == 0 && "TICK_PER_US should be divisible by APB frequency (in MHz)");
systimer_ll_set_step_for_xtal(hal->dev, SYSTIMER_TICKS_PER_US / apb_ticks_per_us);
if (apb_ticks_per_us != SYSTIMER_LL_TICKS_PER_US) {
assert((SYSTIMER_LL_TICKS_PER_US % apb_ticks_per_us) == 0 && "TICK_PER_US should be divisible by APB frequency (in MHz)");
systimer_ll_set_step_for_xtal(hal->dev, SYSTIMER_LL_TICKS_PER_US / apb_ticks_per_us);
}
}
#endif