Daiki Kato / mbed-os-lychee

mbed-os for GR-LYCHEE

Dependents:   mbed-os-example-blinky-gr-lychee GR-Boads_Camera_sample GR-Boards_Audio_Recoder GR-Boads_Camera_DisplayApp ... more

platform/mbed_wait_api_rtos.cpp@0:f782d9c66c49, 2018-02-02 (annotated)

Committer:
dkato
Date:
Fri Feb 02 05:42:23 2018 +0000
Revision:
0:f782d9c66c49
mbed-os for GR-LYCHEE

Who changed what in which revision?

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dkato 0:f782d9c66c49 1 /* mbed Microcontroller Library
dkato 0:f782d9c66c49 2 * Copyright (c) 2006-2013 ARM Limited
dkato 0:f782d9c66c49 3 *
dkato 0:f782d9c66c49 4 * Licensed under the Apache License, Version 2.0 (the "License");
dkato 0:f782d9c66c49 5 * you may not use this file except in compliance with the License.
dkato 0:f782d9c66c49 6 * You may obtain a copy of the License at
dkato 0:f782d9c66c49 7 *
dkato 0:f782d9c66c49 8 * http://www.apache.org/licenses/LICENSE-2.0
dkato 0:f782d9c66c49 9 *
dkato 0:f782d9c66c49 10 * Unless required by applicable law or agreed to in writing, software
dkato 0:f782d9c66c49 11 * distributed under the License is distributed on an "AS IS" BASIS,
dkato 0:f782d9c66c49 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
dkato 0:f782d9c66c49 13 * See the License for the specific language governing permissions and
dkato 0:f782d9c66c49 14 * limitations under the License.
dkato 0:f782d9c66c49 15 */
dkato 0:f782d9c66c49 16
dkato 0:f782d9c66c49 17 // This implementation of the wait functions will be compiled only
dkato 0:f782d9c66c49 18 // if the RTOS is present.
dkato 0:f782d9c66c49 19 #ifdef MBED_CONF_RTOS_PRESENT
dkato 0:f782d9c66c49 20
dkato 0:f782d9c66c49 21 #include "platform/mbed_wait_api.h"
dkato 0:f782d9c66c49 22 #include "hal/us_ticker_api.h"
dkato 0:f782d9c66c49 23 #include "rtos/rtos.h"
dkato 0:f782d9c66c49 24 #include "platform/mbed_critical.h"
dkato 0:f782d9c66c49 25
dkato 0:f782d9c66c49 26 void wait(float s) {
dkato 0:f782d9c66c49 27 wait_us(s * 1000000.0f);
dkato 0:f782d9c66c49 28 }
dkato 0:f782d9c66c49 29
dkato 0:f782d9c66c49 30 void wait_ms(int ms) {
dkato 0:f782d9c66c49 31 wait_us(ms * 1000);
dkato 0:f782d9c66c49 32 }
dkato 0:f782d9c66c49 33
dkato 0:f782d9c66c49 34 void wait_us(int us) {
dkato 0:f782d9c66c49 35 uint32_t start = us_ticker_read();
dkato 0:f782d9c66c49 36 // Use the RTOS to wait for millisecond delays if possible
dkato 0:f782d9c66c49 37 int ms = us / 1000;
dkato 0:f782d9c66c49 38 if ((ms > 0) && core_util_are_interrupts_enabled()) {
dkato 0:f782d9c66c49 39 Thread::wait((uint32_t)ms);
dkato 0:f782d9c66c49 40 }
dkato 0:f782d9c66c49 41 // Use busy waiting for sub-millisecond delays, or for the whole
dkato 0:f782d9c66c49 42 // interval if interrupts are not enabled
dkato 0:f782d9c66c49 43 while ((us_ticker_read() - start) < (uint32_t)us);
dkato 0:f782d9c66c49 44 }
dkato 0:f782d9c66c49 45
dkato 0:f782d9c66c49 46 #endif // #if MBED_CONF_RTOS_PRESENT
dkato 0:f782d9c66c49 47