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
16 #include "pw_chrono_threadx/config.h"
18 // ThreadX does not have an API to determine the tick rate/period, instead
19 // require the user to specify this through the configuration.
20 #define PW_CHRONO_SYSTEM_CLOCK_PERIOD_SECONDS_NUMERATOR \
21 PW_CHRONO_THREADX_CFG_CLOCK_PERIOD_SECONDS_NUMERATOR
22 #define PW_CHRONO_SYSTEM_CLOCK_PERIOD_SECONDS_DENOMINATOR \
23 PW_CHRONO_THREADX_CFG_CLOCK_PERIOD_SECONDS_DENOMINATOR
27 #include "pw_chrono/epoch.h"
29 namespace pw::chrono::backend {
31 // The ThreadX clock starts at zero during initialization, approximately the
33 constexpr inline Epoch kSystemClockEpoch = pw::chrono::Epoch::kTimeSinceBoot;
35 // The current backend implementation is not NMI safe.
36 constexpr inline bool kSystemClockNmiSafe = false;
38 // The ThreadX clock halts when the systick interrupt is masked.
39 constexpr inline bool kSystemClockFreeRunning = false;
41 } // namespace pw::chrono::backend