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alarm.c
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alarm.c
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/*
* Copyright (c) 2020, The OpenThread Authors.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "platform-esp32.h"
#include <stdbool.h>
#include <stdint.h>
#include <freertos/FreeRTOS.h>
#include <freertos/task.h>
#include <esp_log.h>
#include <esp_timer.h>
#include <openthread/config.h>
#include <openthread/platform/alarm-milli.h>
#include <openthread/platform/diag.h>
#include <openthread/platform/time.h>
#include "error_handling.h"
static uint64_t sAlarmT0 = 0;
static uint64_t sAlarmDt = 0;
static bool sIsRunning = false;
uint64_t otPlatTimeGet(void)
{
struct timeval tv_now;
int err = gettimeofday(&tv_now, NULL);
VerifyOrDie(err == 0, OT_EXIT_FAILURE);
return (uint64_t)tv_now.tv_sec * OT_US_PER_S + tv_now.tv_usec;
}
void otPlatAlarmMilliStartAt(otInstance *aInstance, uint32_t aT0, uint32_t aDt)
{
OT_UNUSED_VARIABLE(aInstance);
sAlarmT0 = aT0;
sAlarmDt = aDt;
sIsRunning = true;
ESP_LOGD(OT_PLAT_LOG_TAG, "alarm start running, t0=%llu, dt=%llu", sAlarmT0, sAlarmDt);
}
void otPlatAlarmMilliStop(otInstance *aInstance)
{
OT_UNUSED_VARIABLE(aInstance);
sIsRunning = false;
}
uint32_t otPlatAlarmMilliGetNow(void)
{
return esp_timer_get_time() / OT_US_PER_MS;
}
void platformAlarmUpdate(otSysMainloopContext *aMainloop)
{
struct timeval *timeout = &aMainloop->mTimeout;
uint32_t now = otPlatAlarmMilliGetNow();
if (!sIsRunning)
{
timeout->tv_sec = INT32_MAX;
timeout->tv_usec = 0;
}
else if (sAlarmDt + sAlarmT0 > now)
{
uint64_t remaining = sAlarmDt + sAlarmT0 - now;
timeout->tv_sec = remaining / OT_MS_PER_S;
timeout->tv_usec = (remaining % OT_MS_PER_S) * OT_US_PER_MS;
}
else
{
timeout->tv_sec = 0;
timeout->tv_usec = 0;
}
}
void platformAlarmProcess(otInstance *aInstance, const otSysMainloopContext *aMainloop)
{
OT_UNUSED_VARIABLE(aMainloop);
if (sIsRunning)
{
if (sAlarmT0 + sAlarmDt <= otPlatAlarmMilliGetNow())
{
sIsRunning = false;
#if OPENTHREAD_CONFIG_DIAG_ENABLE
if (otPlatDiagModeGet())
{
otPlatDiagAlarmFired(aInstance);
}
else
#endif
{
otPlatAlarmMilliFired(aInstance);
}
ESP_LOGD(OT_PLAT_LOG_TAG, "alarm fired");
}
}
}