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refactor(esp_timer): Remove duplicate code and move it to a common file

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KonstantinKondrashov
2023-07-12 00:50:09 +08:00
parent bfcad8d8a2
commit 5693e0188b
7 changed files with 89 additions and 117 deletions
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70
components/esp_timer/src/esp_timer_impl_common.c Normal file
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/*
* SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "esp_timer_impl.h"
#include "esp_timer.h"
#include "esp_err.h"
#include "esp_task.h"
#include "esp_attr.h"
/* Spinlock used to protect access to the hardware registers. */
portMUX_TYPE s_time_update_lock = portMUX_INITIALIZER_UNLOCKED;
/* Alarm values to generate interrupt on match
* [0] - for ESP_TIMER_TASK alarms,
* [1] - for ESP_TIMER_ISR alarms.
*/
uint64_t timestamp_id[2] = { UINT64_MAX, UINT64_MAX };
void esp_timer_impl_lock(void)
{
portENTER_CRITICAL(&s_time_update_lock);
}
void esp_timer_impl_unlock(void)
{
portEXIT_CRITICAL(&s_time_update_lock);
}
void esp_timer_private_lock(void) __attribute__((alias("esp_timer_impl_lock")));
void esp_timer_private_unlock(void) __attribute__((alias("esp_timer_impl_unlock")));
void IRAM_ATTR esp_timer_impl_set_alarm(uint64_t timestamp)
{
esp_timer_impl_set_alarm_id(timestamp, 0);
}
#ifdef CONFIG_ESP_TIMER_SUPPORTS_ISR_DISPATCH_METHOD
void IRAM_ATTR esp_timer_impl_try_to_set_next_alarm(void) {
portENTER_CRITICAL_ISR(&s_time_update_lock);
unsigned now_alarm_idx; // ISR is called due to this current alarm
unsigned next_alarm_idx; // The following alarm after now_alarm_idx
if (timestamp_id[0] < timestamp_id[1]) {
now_alarm_idx = 0;
next_alarm_idx = 1;
} else {
now_alarm_idx = 1;
next_alarm_idx = 0;
}
if (timestamp_id[next_alarm_idx] != UINT64_MAX) {
// The following alarm is valid and can be used.
// Remove the current alarm from consideration.
esp_timer_impl_set_alarm_id(UINT64_MAX, now_alarm_idx);
} else {
// There is no the following alarm.
// Remove the current alarm from consideration as well.
timestamp_id[now_alarm_idx] = UINT64_MAX;
}
portEXIT_CRITICAL_ISR(&s_time_update_lock);
}
#endif
/* FIXME: This value is safe for 80MHz APB frequency, should be modified to depend on clock frequency. */
uint64_t IRAM_ATTR esp_timer_impl_get_min_period_us(void)
{
return 50;
}