ResetReason.cpp

00001 /*
00002  * Copyright (c) 2018-2019 Arm Limited and affiliates.
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 #include "ResetReason.h"
00019 
00020 #ifdef DEVICE_RESET_REASON
00021 
00022 namespace mbed {
00023 
00024 reset_reason_t ResetReason::get()
00025 {
00026     // Store the reason statically so it can be accessed after the first call to
00027     // this function resets it.
00028     const static reset_reason_t reason = hal_reset_reason_get();
00029 
00030     // Call get raw to cache the reset reason before clearing the registers.
00031     ResetReason::get_raw();
00032 
00033     hal_reset_reason_clear();
00034 
00035     return reason;
00036 }
00037 
00038 uint32_t ResetReason::get_raw()
00039 {
00040     const static uint32_t reason = hal_reset_reason_get_raw();
00041 
00042     return reason;
00043 }
00044 
00045 } // namespace mbed
00046 
00047 #endif // DEVICE_RESET_REASON