1 // Copyright 2020 The Pigweed Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not 4 // use this file except in compliance with the License. You may obtain a copy of 5 // the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12 // License for the specific language governing permissions and limitations under 13 // the License. 14 #pragma once 15 16 #include "FreeRTOS.h" 17 18 // Use the FreeRTOS config's tick rate. 19 #define PW_CHRONO_SYSTEM_CLOCK_PERIOD_SECONDS_NUMERATOR 1 20 #define PW_CHRONO_SYSTEM_CLOCK_PERIOD_SECONDS_DENOMINATOR configTICK_RATE_HZ 21 22 #ifdef __cplusplus 23 24 #include "pw_chrono/epoch.h" 25 26 namespace pw::chrono::backend { 27 28 // The FreeRTOS clock starts at zero during initialization, approximately the 29 // time since boot. 30 constexpr inline Epoch kSystemClockEpoch = pw::chrono::Epoch::kTimeSinceBoot; 31 32 // The current backend implementation is not NMI safe. 33 constexpr inline bool kSystemClockNmiSafe = false; 34 35 // The FreeRTOS clock halts when the systick interrupt is masked. 36 constexpr inline bool kSystemClockFreeRunning = false; 37 38 } // namespace pw::chrono::backend 39 40 #endif // __cplusplus 41