Gan likun / mbed-dev11

platform/mbed_wait_api_rtos.cpp@0:06036f8bee2d, 2022-10-24 (annotated)

Committer:
ganlikun
Date:
Mon Oct 24 15:19:39 2022 +0000
Revision:
0:06036f8bee2d
11

Who changed what in which revision?

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ganlikun 0:06036f8bee2d 1 /* mbed Microcontroller Library
ganlikun 0:06036f8bee2d 2 * Copyright (c) 2006-2013 ARM Limited
ganlikun 0:06036f8bee2d 3 *
ganlikun 0:06036f8bee2d 4 * Licensed under the Apache License, Version 2.0 (the "License");
ganlikun 0:06036f8bee2d 5 * you may not use this file except in compliance with the License.
ganlikun 0:06036f8bee2d 6 * You may obtain a copy of the License at
ganlikun 0:06036f8bee2d 7 *
ganlikun 0:06036f8bee2d 8 * http://www.apache.org/licenses/LICENSE-2.0
ganlikun 0:06036f8bee2d 9 *
ganlikun 0:06036f8bee2d 10 * Unless required by applicable law or agreed to in writing, software
ganlikun 0:06036f8bee2d 11 * distributed under the License is distributed on an "AS IS" BASIS,
ganlikun 0:06036f8bee2d 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
ganlikun 0:06036f8bee2d 13 * See the License for the specific language governing permissions and
ganlikun 0:06036f8bee2d 14 * limitations under the License.
ganlikun 0:06036f8bee2d 15 */
ganlikun 0:06036f8bee2d 16
ganlikun 0:06036f8bee2d 17 // This implementation of the wait functions will be compiled only
ganlikun 0:06036f8bee2d 18 // if the RTOS is present.
ganlikun 0:06036f8bee2d 19 #ifdef MBED_CONF_RTOS_PRESENT
ganlikun 0:06036f8bee2d 20
ganlikun 0:06036f8bee2d 21 #include "platform/mbed_wait_api.h"
ganlikun 0:06036f8bee2d 22 #include "hal/us_ticker_api.h"
ganlikun 0:06036f8bee2d 23 #include "rtos/rtos.h"
ganlikun 0:06036f8bee2d 24 #include "platform/mbed_critical.h"
ganlikun 0:06036f8bee2d 25 #include "platform/mbed_sleep.h"
ganlikun 0:06036f8bee2d 26
ganlikun 0:06036f8bee2d 27 void wait(float s) {
ganlikun 0:06036f8bee2d 28 wait_us(s * 1000000.0f);
ganlikun 0:06036f8bee2d 29 }
ganlikun 0:06036f8bee2d 30
ganlikun 0:06036f8bee2d 31 void wait_ms(int ms) {
ganlikun 0:06036f8bee2d 32 wait_us(ms * 1000);
ganlikun 0:06036f8bee2d 33 }
ganlikun 0:06036f8bee2d 34
ganlikun 0:06036f8bee2d 35 void wait_us(int us) {
ganlikun 0:06036f8bee2d 36 const ticker_data_t *const ticker = get_us_ticker_data();
ganlikun 0:06036f8bee2d 37
ganlikun 0:06036f8bee2d 38 uint32_t start = ticker_read(ticker);
ganlikun 0:06036f8bee2d 39 // Use the RTOS to wait for millisecond delays if possible
ganlikun 0:06036f8bee2d 40 int ms = us / 1000;
ganlikun 0:06036f8bee2d 41 if ((ms > 0) && core_util_are_interrupts_enabled()) {
ganlikun 0:06036f8bee2d 42 sleep_manager_lock_deep_sleep();
ganlikun 0:06036f8bee2d 43 Thread::wait((uint32_t)ms);
ganlikun 0:06036f8bee2d 44 sleep_manager_unlock_deep_sleep();
ganlikun 0:06036f8bee2d 45 }
ganlikun 0:06036f8bee2d 46 // Use busy waiting for sub-millisecond delays, or for the whole
ganlikun 0:06036f8bee2d 47 // interval if interrupts are not enabled
ganlikun 0:06036f8bee2d 48 while ((ticker_read(ticker) - start) < (uint32_t)us);
ganlikun 0:06036f8bee2d 49 }
ganlikun 0:06036f8bee2d 50
ganlikun 0:06036f8bee2d 51 #endif // #if MBED_CONF_RTOS_PRESENT
ganlikun 0:06036f8bee2d 52
ganlikun 0:06036f8bee2d 53