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@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
187:0387e8f68319 
mbed library release version 165

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
AnnaBridge 189:f392fc9709a3 3 * SPDX-License-Identifier: Apache-2.0
<> 149:156823d33999 4 *
<> 149:156823d33999 5 * Licensed under the Apache License, Version 2.0 (the "License");
<> 149:156823d33999 6 * you may not use this file except in compliance with the License.
<> 149:156823d33999 7 * You may obtain a copy of the License at
<> 149:156823d33999 8 *
<> 149:156823d33999 9 * http://www.apache.org/licenses/LICENSE-2.0
<> 149:156823d33999 10 *
<> 149:156823d33999 11 * Unless required by applicable law or agreed to in writing, software
<> 149:156823d33999 12 * distributed under the License is distributed on an "AS IS" BASIS,
<> 149:156823d33999 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 149:156823d33999 14 * See the License for the specific language governing permissions and
<> 149:156823d33999 15 * limitations under the License.
<> 149:156823d33999 16 */
<> 149:156823d33999 17
<> 149:156823d33999 18 // This implementation of the wait functions will be compiled only
<> 149:156823d33999 19 // if the RTOS is present.
<> 149:156823d33999 20 #ifdef MBED_CONF_RTOS_PRESENT
<> 149:156823d33999 21
<> 160:d5399cc887bb 22 #include "platform/mbed_wait_api.h"
<> 149:156823d33999 23 #include "hal/us_ticker_api.h"
AnnaBridge 189:f392fc9709a3 24 #include "rtos/ThisThread.h"
<> 160:d5399cc887bb 25 #include "platform/mbed_critical.h"
AnnaBridge 184:08ed48f1de7f 26 #include "platform/mbed_power_mgmt.h"
AnnaBridge 189:f392fc9709a3 27 #include "platform/mbed_error.h"
AnnaBridge 189:f392fc9709a3 28 #include "rtos/ThisThread.h"
<> 149:156823d33999 29
AnnaBridge 187:0387e8f68319 30 void wait(float s)
AnnaBridge 187:0387e8f68319 31 {
AnnaBridge 189:f392fc9709a3 32 if ((s >= 0.01f) && core_util_are_interrupts_enabled()) {
AnnaBridge 189:f392fc9709a3 33 wait_ms(s * 1000.0f);
AnnaBridge 189:f392fc9709a3 34 return;
AnnaBridge 189:f392fc9709a3 35 }
<> 149:156823d33999 36
AnnaBridge 189:f392fc9709a3 37 uint32_t us = (s * 1000000.0f);
AnnaBridge 175:af195413fb11 38 const ticker_data_t *const ticker = get_us_ticker_data();
AnnaBridge 175:af195413fb11 39 uint32_t start = ticker_read(ticker);
AnnaBridge 187:0387e8f68319 40 if ((us >= 1000) && core_util_are_interrupts_enabled()) {
AnnaBridge 187:0387e8f68319 41 // Use the RTOS to wait for millisecond delays if possible
AnnaBridge 175:af195413fb11 42 sleep_manager_lock_deep_sleep();
AnnaBridge 189:f392fc9709a3 43 rtos::ThisThread::sleep_for((uint32_t)us / 1000);
AnnaBridge 175:af195413fb11 44 sleep_manager_unlock_deep_sleep();
<> 149:156823d33999 45 }
<> 149:156823d33999 46 // Use busy waiting for sub-millisecond delays, or for the whole
<> 149:156823d33999 47 // interval if interrupts are not enabled
AnnaBridge 175:af195413fb11 48 while ((ticker_read(ticker) - start) < (uint32_t)us);
<> 149:156823d33999 49 }
<> 149:156823d33999 50
AnnaBridge 189:f392fc9709a3 51 /* The actual time delay may be up to one timer tick less - 1 msec */
AnnaBridge 189:f392fc9709a3 52 void wait_ms(int ms)
AnnaBridge 189:f392fc9709a3 53 {
AnnaBridge 189:f392fc9709a3 54 if (core_util_is_isr_active() || !core_util_are_interrupts_enabled()) {
AnnaBridge 189:f392fc9709a3 55 #if defined(MBED_TRAP_ERRORS_ENABLED) && MBED_TRAP_ERRORS_ENABLED
AnnaBridge 189:f392fc9709a3 56 MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_PLATFORM, MBED_ERROR_INVALID_OPERATION),
AnnaBridge 189:f392fc9709a3 57 "Deprecated behavior: milli-sec delay should not be used in interrupt.\n");
AnnaBridge 189:f392fc9709a3 58 #else
AnnaBridge 189:f392fc9709a3 59 wait_us(ms * 1000);
AnnaBridge 189:f392fc9709a3 60 #endif
AnnaBridge 189:f392fc9709a3 61 } else {
AnnaBridge 189:f392fc9709a3 62 rtos::ThisThread::sleep_for(ms);
AnnaBridge 189:f392fc9709a3 63 }
AnnaBridge 189:f392fc9709a3 64 }
AnnaBridge 189:f392fc9709a3 65
AnnaBridge 189:f392fc9709a3 66 /* The actual time delay may be 1 less usec */
AnnaBridge 189:f392fc9709a3 67 void wait_us(int us)
AnnaBridge 189:f392fc9709a3 68 {
AnnaBridge 189:f392fc9709a3 69 if (us > 10000) {
AnnaBridge 189:f392fc9709a3 70 MBED_WARNING(MBED_MAKE_ERROR(MBED_MODULE_PLATFORM, MBED_ERROR_UNKNOWN),
AnnaBridge 189:f392fc9709a3 71 "wait_us blocks deep sleep, wait_ms recommended for long delays\n");
AnnaBridge 189:f392fc9709a3 72 }
AnnaBridge 189:f392fc9709a3 73 const ticker_data_t *const ticker = get_us_ticker_data();
AnnaBridge 189:f392fc9709a3 74 uint32_t start = ticker_read(ticker);
AnnaBridge 189:f392fc9709a3 75 while ((ticker_read(ticker) - start) < (uint32_t)us);
AnnaBridge 189:f392fc9709a3 76 }
AnnaBridge 189:f392fc9709a3 77
<> 149:156823d33999 78 #endif // #if MBED_CONF_RTOS_PRESENT
<> 149:156823d33999 79