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Diff: platform/mbed_wait_api_rtos.cpp
- Revision:
- 149:156823d33999
diff -r 21d94c44109e -r 156823d33999 platform/mbed_wait_api_rtos.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/platform/mbed_wait_api_rtos.cpp Fri Oct 28 11:17:30 2016 +0100 @@ -0,0 +1,50 @@ +/* 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 +