| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| #include <hal/hal_system.h> |
| |
| #include "stm32f1xx_hal_def.h" |
| |
| enum hal_reset_reason |
| hal_reset_cause(void) |
| { |
| static enum hal_reset_reason reason; |
| uint32_t reg; |
| |
| if (reason) { |
| return reason; |
| } |
| |
| reg = RCC->CSR; |
| |
| if (reg & RCC_CSR_WWDGRSTF) { |
| reason = HAL_RESET_WATCHDOG; |
| } else if (reg & RCC_CSR_SFTRSTF) { |
| reason = HAL_RESET_SOFT; |
| } else if (reg & RCC_CSR_PINRSTF) { |
| reason = HAL_RESET_PIN; |
| } else if (reg & RCC_CSR_LPWRRSTF) { |
| /* For L1xx this is low-power reset */ |
| reason = HAL_RESET_BROWNOUT; |
| } else { |
| reason = HAL_RESET_POR; |
| } |
| RCC->CSR |= RCC_CSR_RMVF; |
| return reason; |
| } |
