| // Copyright 2022 The Pigweed Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| // use this file except in compliance with the License. You may obtain a copy of |
| // the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| // License for the specific language governing permissions and limitations under |
| // the License. |
| |
| #include "pw_spin_delay/delay.h" |
| |
| #include <cstddef> |
| #include <cstdint> |
| |
| #include "clock_config.h" |
| #include "fsl_common.h" |
| #include "fsl_utick.h" |
| |
| namespace pw::spin_delay { |
| |
| namespace { |
| |
| constexpr uint32_t kTickMicros = 1000; // Every 1 ms. |
| bool s_initialized = false; |
| volatile uint32_t s_msec_count = 0; |
| |
| void UTickCallback(void) { s_msec_count++; } |
| |
| void InitTickTimer() { |
| s_initialized = true; |
| UTICK_Init(UTICK0); |
| UTICK_SetTick(UTICK0, kUTICK_Repeat, kTickMicros, UTickCallback); |
| } |
| |
| } // namespace |
| |
| void WaitMillis(size_t delay_ms) { |
| SDK_DelayAtLeastUs(delay_ms * 1000U, BOARD_BOOTCLOCKRUN_CORE_CLOCK); |
| } |
| |
| uint32_t Millis() { |
| if (!s_initialized) { |
| InitTickTimer(); |
| } |
| return s_msec_count; |
| } |
| |
| uint64_t Micros() { |
| if (!s_initialized) { |
| InitTickTimer(); |
| } |
| return static_cast<uint64_t>(s_msec_count) * 1000; |
| } |
| |
| } // namespace pw::spin_delay |