mbed_wait_api_no_rtos.c

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2006-2013 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00017 // This implementation of the wait functions will be compiled only
00018 // if the RTOS is not present.
00019 #ifndef MBED_CONF_RTOS_PRESENT
00020 
00021 #include "platform/mbed_wait_api.h"
00022 #include "hal/us_ticker_api.h"
00023 
00024 void wait(float s)
00025 {
00026     wait_us(s * 1000000.0f);
00027 }
00028 
00029 void wait_ms(int ms)
00030 {
00031     wait_us(ms * 1000);
00032 }
00033 
00034 void wait_us(int us)
00035 {
00036     const ticker_data_t *const ticker = get_us_ticker_data();
00037     uint32_t start = ticker_read(ticker);
00038     while ((ticker_read(ticker) - start) < (uint32_t)us);
00039 }
00040 
00041 #endif // #ifndef MBED_CONF_RTOS_PRESENT
00042