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mbed-os/platform/mbed_wait_api_rtos.cpp@4:75df35ef4fb6, 2018-03-30 (annotated)

Committer:
borlanic
Date:
Fri Mar 30 14:07:05 2018 +0000
Revision:
4:75df35ef4fb6
Parent:
0:380207fcb5c1 
commentar

Who changed what in which revision?

UserRevisionLine numberNew contents of line
borlanic 0:380207fcb5c1 1 /* mbed Microcontroller Library
borlanic 0:380207fcb5c1 2 * Copyright (c) 2006-2013 ARM Limited
borlanic 0:380207fcb5c1 3 *
borlanic 0:380207fcb5c1 4 * Licensed under the Apache License, Version 2.0 (the "License");
borlanic 0:380207fcb5c1 5 * you may not use this file except in compliance with the License.
borlanic 0:380207fcb5c1 6 * You may obtain a copy of the License at
borlanic 0:380207fcb5c1 7 *
borlanic 0:380207fcb5c1 8 * http://www.apache.org/licenses/LICENSE-2.0
borlanic 0:380207fcb5c1 9 *
borlanic 0:380207fcb5c1 10 * Unless required by applicable law or agreed to in writing, software
borlanic 0:380207fcb5c1 11 * distributed under the License is distributed on an "AS IS" BASIS,
borlanic 0:380207fcb5c1 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
borlanic 0:380207fcb5c1 13 * See the License for the specific language governing permissions and
borlanic 0:380207fcb5c1 14 * limitations under the License.
borlanic 0:380207fcb5c1 15 */
borlanic 0:380207fcb5c1 16
borlanic 0:380207fcb5c1 17 // This implementation of the wait functions will be compiled only
borlanic 0:380207fcb5c1 18 // if the RTOS is present.
borlanic 0:380207fcb5c1 19 #ifdef MBED_CONF_RTOS_PRESENT
borlanic 0:380207fcb5c1 20
borlanic 0:380207fcb5c1 21 #include "platform/mbed_wait_api.h"
borlanic 0:380207fcb5c1 22 #include "hal/us_ticker_api.h"
borlanic 0:380207fcb5c1 23 #include "rtos/rtos.h"
borlanic 0:380207fcb5c1 24 #include "platform/mbed_critical.h"
borlanic 0:380207fcb5c1 25 #include "platform/mbed_power_mgmt.h"
borlanic 0:380207fcb5c1 26
borlanic 0:380207fcb5c1 27 void wait(float s) {
borlanic 0:380207fcb5c1 28 wait_us(s * 1000000.0f);
borlanic 0:380207fcb5c1 29 }
borlanic 0:380207fcb5c1 30
borlanic 0:380207fcb5c1 31 void wait_ms(int ms) {
borlanic 0:380207fcb5c1 32 wait_us(ms * 1000);
borlanic 0:380207fcb5c1 33 }
borlanic 0:380207fcb5c1 34
borlanic 0:380207fcb5c1 35 void wait_us(int us) {
borlanic 0:380207fcb5c1 36 const ticker_data_t *const ticker = get_us_ticker_data();
borlanic 0:380207fcb5c1 37
borlanic 0:380207fcb5c1 38 uint32_t start = ticker_read(ticker);
borlanic 0:380207fcb5c1 39 // Use the RTOS to wait for millisecond delays if possible
borlanic 0:380207fcb5c1 40 int ms = us / 1000;
borlanic 0:380207fcb5c1 41 if ((ms > 0) && core_util_are_interrupts_enabled()) {
borlanic 0:380207fcb5c1 42 sleep_manager_lock_deep_sleep();
borlanic 0:380207fcb5c1 43 Thread::wait((uint32_t)ms);
borlanic 0:380207fcb5c1 44 sleep_manager_unlock_deep_sleep();
borlanic 0:380207fcb5c1 45 }
borlanic 0:380207fcb5c1 46 // Use busy waiting for sub-millisecond delays, or for the whole
borlanic 0:380207fcb5c1 47 // interval if interrupts are not enabled
borlanic 0:380207fcb5c1 48 while ((ticker_read(ticker) - start) < (uint32_t)us);
borlanic 0:380207fcb5c1 49 }
borlanic 0:380207fcb5c1 50
borlanic 0:380207fcb5c1 51 #endif // #if MBED_CONF_RTOS_PRESENT
borlanic 0:380207fcb5c1 52