1 // Copyright 2020 The Pigweed Authors
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
7 // https://www.apache.org/licenses/LICENSE-2.0
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
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
24 #include "pw_chrono/epoch.h"
26 namespace pw::chrono::backend {
28 // The FreeRTOS clock starts at zero during initialization, approximately the
30 constexpr inline Epoch kSystemClockEpoch = pw::chrono::Epoch::kTimeSinceBoot;
32 // The current backend implementation is not NMI safe.
33 constexpr inline bool kSystemClockNmiSafe = false;
35 // The FreeRTOS clock halts when the systick interrupt is masked.
36 constexpr inline bool kSystemClockFreeRunning = false;
38 } // namespace pw::chrono::backend