| /* |
| * Copyright (c) 2019, 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. |
| */ |
| |
| /** |
| * @file |
| * This file implements the OpenThread platform abstraction for the alarm. |
| * |
| */ |
| |
| #include <assert.h> |
| #include <stdbool.h> |
| #include <stdint.h> |
| |
| #include "openthread-system.h" |
| #include <openthread/config.h> |
| #include <openthread/platform/alarm-milli.h> |
| #include <openthread/platform/diag.h> |
| #include "common/logging.hpp" |
| |
| #include "platform-efr32.h" |
| #include "utils/code_utils.h" |
| |
| #include "em_core.h" |
| #include "rail.h" |
| #include "sl_sleeptimer.h" |
| |
| #define XTAL_ACCURACY 200 |
| |
| static sl_sleeptimer_timer_handle_t sl_handle; |
| static uint32_t sAlarm = 0; |
| static bool sIsRunning = false; |
| |
| static void AlarmCallback(sl_sleeptimer_timer_handle_t *aHandle, void *aData) |
| { |
| otSysEventSignalPending(); |
| } |
| |
| void efr32AlarmInit(void) |
| { |
| memset(&sl_handle, 0, sizeof sl_handle); |
| } |
| |
| uint32_t otPlatAlarmMilliGetNow(void) |
| { |
| uint64_t ticks; |
| uint64_t now; |
| sl_status_t status; |
| |
| ticks = sl_sleeptimer_get_tick_count64(); |
| status = sl_sleeptimer_tick64_to_ms(ticks, &now); |
| assert(status == SL_STATUS_OK); |
| return (uint32_t)now; |
| } |
| |
| uint32_t otPlatTimeGetXtalAccuracy(void) |
| { |
| return XTAL_ACCURACY; |
| } |
| |
| void otPlatAlarmMilliStartAt(otInstance *aInstance, uint32_t aT0, uint32_t aDt) |
| { |
| OT_UNUSED_VARIABLE(aInstance); |
| sl_status_t status; |
| int32_t remaining; |
| uint32_t ticks; |
| |
| sl_sleeptimer_stop_timer(&sl_handle); |
| |
| sAlarm = aT0 + aDt; |
| remaining = (int32_t)(sAlarm - otPlatAlarmMilliGetNow()); |
| sIsRunning = true; |
| |
| if (remaining <= 0) |
| { |
| otSysEventSignalPending(); |
| } |
| else |
| { |
| status = sl_sleeptimer_ms32_to_tick(remaining, &ticks); |
| assert(status == SL_STATUS_OK); |
| |
| status = sl_sleeptimer_start_timer(&sl_handle, ticks, AlarmCallback, NULL, 0, |
| SL_SLEEPTIMER_NO_HIGH_PRECISION_HF_CLOCKS_REQUIRED_FLAG); |
| assert(status == SL_STATUS_OK); |
| } |
| } |
| |
| void otPlatAlarmMilliStop(otInstance *aInstance) |
| { |
| OT_UNUSED_VARIABLE(aInstance); |
| |
| sl_sleeptimer_stop_timer(&sl_handle); |
| sIsRunning = false; |
| } |
| |
| void efr32AlarmProcess(otInstance *aInstance) |
| { |
| int32_t remaining; |
| |
| if (sIsRunning) |
| { |
| remaining = (int32_t)(sAlarm - otPlatAlarmMilliGetNow()); |
| |
| if (remaining <= 0) |
| { |
| sIsRunning = false; |
| |
| #if OPENTHREAD_CONFIG_DIAG_ENABLE |
| if (otPlatDiagModeGet()) |
| { |
| otPlatDiagAlarmFired(aInstance); |
| } |
| else |
| #endif |
| { |
| otPlatAlarmMilliFired(aInstance); |
| } |
| } |
| } |
| } |