Gan likun / mbed1-dev

001

platform/mbed_wait_api_rtos.cpp@0:13413ea9a877, 2022-06-12 (annotated)

Committer:
ganlikun
Date:
Sun Jun 12 14:02:44 2022 +0000
Revision:
0:13413ea9a877
00

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ganlikun 0:13413ea9a877 1 /* mbed Microcontroller Library
ganlikun 0:13413ea9a877 2 * Copyright (c) 2006-2013 ARM Limited
ganlikun 0:13413ea9a877 3 *
ganlikun 0:13413ea9a877 4 * Licensed under the Apache License, Version 2.0 (the "License");
ganlikun 0:13413ea9a877 5 * you may not use this file except in compliance with the License.
ganlikun 0:13413ea9a877 6 * You may obtain a copy of the License at
ganlikun 0:13413ea9a877 7 *
ganlikun 0:13413ea9a877 8 * http://www.apache.org/licenses/LICENSE-2.0
ganlikun 0:13413ea9a877 9 *
ganlikun 0:13413ea9a877 10 * Unless required by applicable law or agreed to in writing, software
ganlikun 0:13413ea9a877 11 * distributed under the License is distributed on an "AS IS" BASIS,
ganlikun 0:13413ea9a877 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
ganlikun 0:13413ea9a877 13 * See the License for the specific language governing permissions and
ganlikun 0:13413ea9a877 14 * limitations under the License.
ganlikun 0:13413ea9a877 15 */
ganlikun 0:13413ea9a877 16
ganlikun 0:13413ea9a877 17 // This implementation of the wait functions will be compiled only
ganlikun 0:13413ea9a877 18 // if the RTOS is present.
ganlikun 0:13413ea9a877 19 #ifdef MBED_CONF_RTOS_PRESENT
ganlikun 0:13413ea9a877 20
ganlikun 0:13413ea9a877 21 #include "platform/mbed_wait_api.h"
ganlikun 0:13413ea9a877 22 #include "hal/us_ticker_api.h"
ganlikun 0:13413ea9a877 23 #include "rtos/rtos.h"
ganlikun 0:13413ea9a877 24 #include "platform/mbed_critical.h"
ganlikun 0:13413ea9a877 25 #include "platform/mbed_sleep.h"
ganlikun 0:13413ea9a877 26
ganlikun 0:13413ea9a877 27 void wait(float s) {
ganlikun 0:13413ea9a877 28 wait_us(s * 1000000.0f);
ganlikun 0:13413ea9a877 29 }
ganlikun 0:13413ea9a877 30
ganlikun 0:13413ea9a877 31 void wait_ms(int ms) {
ganlikun 0:13413ea9a877 32 wait_us(ms * 1000);
ganlikun 0:13413ea9a877 33 }
ganlikun 0:13413ea9a877 34
ganlikun 0:13413ea9a877 35 void wait_us(int us) {
ganlikun 0:13413ea9a877 36 const ticker_data_t *const ticker = get_us_ticker_data();
ganlikun 0:13413ea9a877 37
ganlikun 0:13413ea9a877 38 uint32_t start = ticker_read(ticker);
ganlikun 0:13413ea9a877 39 // Use the RTOS to wait for millisecond delays if possible
ganlikun 0:13413ea9a877 40 int ms = us / 1000;
ganlikun 0:13413ea9a877 41 if ((ms > 0) && core_util_are_interrupts_enabled()) {
ganlikun 0:13413ea9a877 42 sleep_manager_lock_deep_sleep();
ganlikun 0:13413ea9a877 43 Thread::wait((uint32_t)ms);
ganlikun 0:13413ea9a877 44 sleep_manager_unlock_deep_sleep();
ganlikun 0:13413ea9a877 45 }
ganlikun 0:13413ea9a877 46 // Use busy waiting for sub-millisecond delays, or for the whole
ganlikun 0:13413ea9a877 47 // interval if interrupts are not enabled
ganlikun 0:13413ea9a877 48 while ((ticker_read(ticker) - start) < (uint32_t)us);
ganlikun 0:13413ea9a877 49 }
ganlikun 0:13413ea9a877 50
ganlikun 0:13413ea9a877 51 #endif // #if MBED_CONF_RTOS_PRESENT
ganlikun 0:13413ea9a877 52
ganlikun 0:13413ea9a877 53