mbed library sources. Supersedes mbed-src.
Dependents: Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more
mbed_wait_api_rtos.cpp
00001 /* mbed Microcontroller Library 00002 * Copyright (c) 2006-2013 ARM Limited 00003 * SPDX-License-Identifier: Apache-2.0 00004 * 00005 * Licensed under the Apache License, Version 2.0 (the "License"); 00006 * you may not use this file except in compliance with the License. 00007 * You may obtain a copy of the License at 00008 * 00009 * http://www.apache.org/licenses/LICENSE-2.0 00010 * 00011 * Unless required by applicable law or agreed to in writing, software 00012 * distributed under the License is distributed on an "AS IS" BASIS, 00013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00014 * See the License for the specific language governing permissions and 00015 * limitations under the License. 00016 */ 00017 00018 // This implementation of the wait functions will be compiled only 00019 // if the RTOS is present. 00020 #ifdef MBED_CONF_RTOS_PRESENT 00021 00022 #include "platform/mbed_wait_api.h" 00023 #include "hal/us_ticker_api.h" 00024 #include "rtos/ThisThread.h" 00025 #include "platform/mbed_critical.h" 00026 #include "platform/mbed_power_mgmt.h" 00027 #include "platform/mbed_error.h" 00028 #include "rtos/ThisThread.h" 00029 00030 void wait(float s) 00031 { 00032 if ((s >= 0.01f) && core_util_are_interrupts_enabled()) { 00033 wait_ms(s * 1000.0f); 00034 return; 00035 } 00036 00037 uint32_t us = (s * 1000000.0f); 00038 const ticker_data_t *const ticker = get_us_ticker_data(); 00039 uint32_t start = ticker_read(ticker); 00040 if ((us >= 1000) && core_util_are_interrupts_enabled()) { 00041 // Use the RTOS to wait for millisecond delays if possible 00042 sleep_manager_lock_deep_sleep(); 00043 rtos::ThisThread::sleep_for((uint32_t)us / 1000); 00044 sleep_manager_unlock_deep_sleep(); 00045 } 00046 // Use busy waiting for sub-millisecond delays, or for the whole 00047 // interval if interrupts are not enabled 00048 while ((ticker_read(ticker) - start) < (uint32_t)us); 00049 } 00050 00051 /* The actual time delay may be up to one timer tick less - 1 msec */ 00052 void wait_ms(int ms) 00053 { 00054 if (core_util_is_isr_active() || !core_util_are_interrupts_enabled()) { 00055 #if defined(MBED_TRAP_ERRORS_ENABLED) && MBED_TRAP_ERRORS_ENABLED 00056 MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_PLATFORM, MBED_ERROR_INVALID_OPERATION), 00057 "Deprecated behavior: milli-sec delay should not be used in interrupt.\n"); 00058 #else 00059 wait_us(ms * 1000); 00060 #endif 00061 } else { 00062 rtos::ThisThread::sleep_for(ms); 00063 } 00064 } 00065 00066 /* The actual time delay may be 1 less usec */ 00067 void wait_us(int us) 00068 { 00069 if (us > 10000) { 00070 MBED_WARNING(MBED_MAKE_ERROR(MBED_MODULE_PLATFORM, MBED_ERROR_UNKNOWN), 00071 "wait_us blocks deep sleep, wait_ms recommended for long delays\n"); 00072 } 00073 const ticker_data_t *const ticker = get_us_ticker_data(); 00074 uint32_t start = ticker_read(ticker); 00075 while ((ticker_read(ticker) - start) < (uint32_t)us); 00076 } 00077 00078 #endif // #if MBED_CONF_RTOS_PRESENT 00079
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