mirror of https://github.com/ARMmbed/mbed-os.git
51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
/* mbed Microcontroller Library
|
|
* Copyright (c) 2006-2013 ARM Limited
|
|
*
|
|
* 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
|
|
*
|
|
* http://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.
|
|
*/
|
|
|
|
// This implementation of the wait functions will be compiled only
|
|
// if the RTOS is present.
|
|
#ifdef MBED_CONF_RTOS_PRESENT
|
|
|
|
#include "platform/wait_api.h"
|
|
#include "hal/us_ticker_api.h"
|
|
#include "rtos/rtos.h"
|
|
#include "platform/critical.h"
|
|
|
|
void wait(float s) {
|
|
wait_us(s * 1000000.0f);
|
|
}
|
|
|
|
void wait_ms(int ms) {
|
|
wait_us(ms * 1000);
|
|
}
|
|
|
|
void wait_us(int us) {
|
|
uint32_t start = us_ticker_read();
|
|
// Use the RTOS to wait for millisecond delays if possible
|
|
int ms = us / 1000;
|
|
if ((ms > 0) && core_util_are_interrupts_enabled()) {
|
|
Thread::wait((uint32_t)ms);
|
|
us -= ms * 1000;
|
|
}
|
|
// Use busy waiting for sub-millisecond delays, or for the whole
|
|
// interval if interrupts are not enabled
|
|
if (us > 0) {
|
|
while((us_ticker_read() - start) < (uint32_t)us);
|
|
}
|
|
}
|
|
|
|
#endif // #if MBED_CONF_RTOS_PRESENT
|
|
|