mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

platform/mbed_wait_api_rtos.cpp@187:0387e8f68319, 2018-09-06 (annotated)

Committer:
AnnaBridge
Date:
Thu Sep 06 13:40:20 2018 +0100
Revision:
187:0387e8f68319
Parent:
184:08ed48f1de7f
Child:
189:f392fc9709a3
mbed-dev library. Release version 163

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 149:156823d33999 1 /* mbed Microcontroller Library
<> 149:156823d33999 2 * Copyright (c) 2006-2013 ARM Limited
<> 149:156823d33999 3 *
<> 149:156823d33999 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 149:156823d33999 5 * you may not use this file except in compliance with the License.
<> 149:156823d33999 6 * You may obtain a copy of the License at
<> 149:156823d33999 7 *
<> 149:156823d33999 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 149:156823d33999 9 *
<> 149:156823d33999 10 * Unless required by applicable law or agreed to in writing, software
<> 149:156823d33999 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 149:156823d33999 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 149:156823d33999 13 * See the License for the specific language governing permissions and
<> 149:156823d33999 14 * limitations under the License.
<> 149:156823d33999 15 */
<> 149:156823d33999 16
<> 149:156823d33999 17 // This implementation of the wait functions will be compiled only
<> 149:156823d33999 18 // if the RTOS is present.
<> 149:156823d33999 19 #ifdef MBED_CONF_RTOS_PRESENT
<> 149:156823d33999 20
<> 160:d5399cc887bb 21 #include "platform/mbed_wait_api.h"
<> 149:156823d33999 22 #include "hal/us_ticker_api.h"
<> 149:156823d33999 23 #include "rtos/rtos.h"
<> 160:d5399cc887bb 24 #include "platform/mbed_critical.h"
AnnaBridge 184:08ed48f1de7f 25 #include "platform/mbed_power_mgmt.h"
<> 149:156823d33999 26
AnnaBridge 187:0387e8f68319 27 void wait(float s)
AnnaBridge 187:0387e8f68319 28 {
<> 149:156823d33999 29 wait_us(s * 1000000.0f);
<> 149:156823d33999 30 }
<> 149:156823d33999 31
AnnaBridge 187:0387e8f68319 32 void wait_ms(int ms)
AnnaBridge 187:0387e8f68319 33 {
<> 149:156823d33999 34 wait_us(ms * 1000);
<> 149:156823d33999 35 }
<> 149:156823d33999 36
AnnaBridge 187:0387e8f68319 37 void wait_us(int us)
AnnaBridge 187:0387e8f68319 38 {
AnnaBridge 175:af195413fb11 39 const ticker_data_t *const ticker = get_us_ticker_data();
AnnaBridge 175:af195413fb11 40
AnnaBridge 175:af195413fb11 41 uint32_t start = ticker_read(ticker);
AnnaBridge 187:0387e8f68319 42 if ((us >= 1000) && core_util_are_interrupts_enabled()) {
AnnaBridge 187:0387e8f68319 43 // Use the RTOS to wait for millisecond delays if possible
AnnaBridge 175:af195413fb11 44 sleep_manager_lock_deep_sleep();
AnnaBridge 187:0387e8f68319 45 Thread::wait((uint32_t)us / 1000);
AnnaBridge 175:af195413fb11 46 sleep_manager_unlock_deep_sleep();
<> 149:156823d33999 47 }
<> 149:156823d33999 48 // Use busy waiting for sub-millisecond delays, or for the whole
<> 149:156823d33999 49 // interval if interrupts are not enabled
AnnaBridge 175:af195413fb11 50 while ((ticker_read(ticker) - start) < (uint32_t)us);
<> 149:156823d33999 51 }
<> 149:156823d33999 52
<> 149:156823d33999 53 #endif // #if MBED_CONF_RTOS_PRESENT
<> 149:156823d33999 54