Marco Zecchini / Mbed OS Example_RTOS

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mbed-os/platform/mbed_wait_api_rtos.cpp@0:9fca2b23d0ba, 2019-02-23 (annotated)

Committer:
marcozecchini
Date:
Sat Feb 23 12:13:36 2019 +0000
Revision:
0:9fca2b23d0ba
final commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
marcozecchini 0:9fca2b23d0ba 1 /* mbed Microcontroller Library
marcozecchini 0:9fca2b23d0ba 2 * Copyright (c) 2006-2013 ARM Limited
marcozecchini 0:9fca2b23d0ba 3 *
marcozecchini 0:9fca2b23d0ba 4 * Licensed under the Apache License, Version 2.0 (the "License");
marcozecchini 0:9fca2b23d0ba 5 * you may not use this file except in compliance with the License.
marcozecchini 0:9fca2b23d0ba 6 * You may obtain a copy of the License at
marcozecchini 0:9fca2b23d0ba 7 *
marcozecchini 0:9fca2b23d0ba 8 * http://www.apache.org/licenses/LICENSE-2.0
marcozecchini 0:9fca2b23d0ba 9 *
marcozecchini 0:9fca2b23d0ba 10 * Unless required by applicable law or agreed to in writing, software
marcozecchini 0:9fca2b23d0ba 11 * distributed under the License is distributed on an "AS IS" BASIS,
marcozecchini 0:9fca2b23d0ba 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
marcozecchini 0:9fca2b23d0ba 13 * See the License for the specific language governing permissions and
marcozecchini 0:9fca2b23d0ba 14 * limitations under the License.
marcozecchini 0:9fca2b23d0ba 15 */
marcozecchini 0:9fca2b23d0ba 16
marcozecchini 0:9fca2b23d0ba 17 // This implementation of the wait functions will be compiled only
marcozecchini 0:9fca2b23d0ba 18 // if the RTOS is present.
marcozecchini 0:9fca2b23d0ba 19 #ifdef MBED_CONF_RTOS_PRESENT
marcozecchini 0:9fca2b23d0ba 20
marcozecchini 0:9fca2b23d0ba 21 #include "platform/mbed_wait_api.h"
marcozecchini 0:9fca2b23d0ba 22 #include "hal/us_ticker_api.h"
marcozecchini 0:9fca2b23d0ba 23 #include "rtos/rtos.h"
marcozecchini 0:9fca2b23d0ba 24 #include "platform/mbed_critical.h"
marcozecchini 0:9fca2b23d0ba 25 #include "platform/mbed_sleep.h"
marcozecchini 0:9fca2b23d0ba 26
marcozecchini 0:9fca2b23d0ba 27 void wait(float s) {
marcozecchini 0:9fca2b23d0ba 28 wait_us(s * 1000000.0f);
marcozecchini 0:9fca2b23d0ba 29 }
marcozecchini 0:9fca2b23d0ba 30
marcozecchini 0:9fca2b23d0ba 31 void wait_ms(int ms) {
marcozecchini 0:9fca2b23d0ba 32 wait_us(ms * 1000);
marcozecchini 0:9fca2b23d0ba 33 }
marcozecchini 0:9fca2b23d0ba 34
marcozecchini 0:9fca2b23d0ba 35 void wait_us(int us) {
marcozecchini 0:9fca2b23d0ba 36 const ticker_data_t *const ticker = get_us_ticker_data();
marcozecchini 0:9fca2b23d0ba 37
marcozecchini 0:9fca2b23d0ba 38 uint32_t start = ticker_read(ticker);
marcozecchini 0:9fca2b23d0ba 39 // Use the RTOS to wait for millisecond delays if possible
marcozecchini 0:9fca2b23d0ba 40 int ms = us / 1000;
marcozecchini 0:9fca2b23d0ba 41 if ((ms > 0) && core_util_are_interrupts_enabled()) {
marcozecchini 0:9fca2b23d0ba 42 sleep_manager_lock_deep_sleep();
marcozecchini 0:9fca2b23d0ba 43 Thread::wait((uint32_t)ms);
marcozecchini 0:9fca2b23d0ba 44 sleep_manager_unlock_deep_sleep();
marcozecchini 0:9fca2b23d0ba 45 }
marcozecchini 0:9fca2b23d0ba 46 // Use busy waiting for sub-millisecond delays, or for the whole
marcozecchini 0:9fca2b23d0ba 47 // interval if interrupts are not enabled
marcozecchini 0:9fca2b23d0ba 48 while ((ticker_read(ticker) - start) < (uint32_t)us);
marcozecchini 0:9fca2b23d0ba 49 }
marcozecchini 0:9fca2b23d0ba 50
marcozecchini 0:9fca2b23d0ba 51 #endif // #if MBED_CONF_RTOS_PRESENT
marcozecchini 0:9fca2b23d0ba 52