mirror of https://github.com/ARMmbed/mbed-os.git
115 lines
3.7 KiB
C
115 lines
3.7 KiB
C
/* mbed Microcontroller Library
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* Copyright(C) Toshiba Electronic Device Solutions Corporation 2020
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "device.h"
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#include "mbed_error.h"
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#include "PeripheralNames.h"
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#include "pinmap.h"
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#include "reset_reason_api.h"
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#define CLEAR_FLAGS (0)
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//reset reason flag bit positions
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#define PORSTF_FLAG (1<<0)
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#define PINRSTF_FLAG (1<<3)
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#define LVDRSTF_FLAG (1<<5)
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#define SYSRSTF_FLAG (1<<0)
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#define LOCKRSTF_FLAG (1<<1)
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#define WDTRSTF_FLAG (1<<2)
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#define OFDRSTF_FLAG (1<<3)
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reset_reason_t hal_reset_reason_get(void)
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{
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reset_reason_t reason = RESET_REASON_UNKNOWN;
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//check if its power on reset, as it clears other flags to 0 or undefined state.
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if (TSB_RLM->RSTFLG0 & PORSTF_FLAG) {
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//set PINRSTF_FLAG and LVDRSTF_FLAG flags to 0 as they may be in undefined state after POR
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TSB_RLM->RSTFLG0 &= ~(PINRSTF_FLAG | LVDRSTF_FLAG);
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reason = RESET_REASON_POWER_ON;
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} else {
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//multiple reset reasons might occur if flags are not cleared in previous reset
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//hence check all flags.
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if (TSB_RLM->RSTFLG0 & PINRSTF_FLAG) {
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reason = RESET_REASON_PIN_RESET;
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}
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if (TSB_RLM->RSTFLG0 & LVDRSTF_FLAG) {
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reason = (reason == RESET_REASON_UNKNOWN) ? RESET_REASON_BROWN_OUT : RESET_REASON_MULTIPLE;
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}
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// check 2nd reset reason register
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if (TSB_RLM->RSTFLG1 & SYSRSTF_FLAG) {
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reason = (reason == RESET_REASON_UNKNOWN) ? RESET_REASON_SOFTWARE : RESET_REASON_MULTIPLE;
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}
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if (TSB_RLM->RSTFLG1 & LOCKRSTF_FLAG) {
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reason = (reason == RESET_REASON_UNKNOWN) ? RESET_REASON_LOCKUP : RESET_REASON_MULTIPLE;
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}
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if (TSB_RLM->RSTFLG1 & WDTRSTF_FLAG) {
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reason = (reason == RESET_REASON_UNKNOWN) ? RESET_REASON_WATCHDOG : RESET_REASON_MULTIPLE;
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}
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if (TSB_RLM->RSTFLG1 & OFDRSTF_FLAG) {
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reason = (reason == RESET_REASON_UNKNOWN) ? RESET_REASON_PLATFORM : RESET_REASON_MULTIPLE;
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}
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}
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return reason;
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}
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void hal_reset_reason_get_capabilities(reset_reason_capabilities_t *cap)
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{
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cap->reasons = 1 << RESET_REASON_UNKNOWN;
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cap->reasons |= 1 << RESET_REASON_POWER_ON;
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cap->reasons |= 1 << RESET_REASON_PIN_RESET;
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cap->reasons |= 1 << RESET_REASON_BROWN_OUT;
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cap->reasons |= 1 << RESET_REASON_SOFTWARE;
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cap->reasons |= 1 << RESET_REASON_LOCKUP;
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cap->reasons |= 1 << RESET_REASON_WATCHDOG;
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cap->reasons |= 1 << RESET_REASON_PLATFORM;
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cap->reasons |= 1 << RESET_REASON_MULTIPLE;
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}
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uint32_t hal_reset_reason_get_raw(void)
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{
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uint32_t reason_raw = 0;
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//check if its power on reset, as it clears other flags to 0 or undefined state.
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if (TSB_RLM->RSTFLG0 & PORSTF_FLAG) {
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//set PINRSTF_FLAG and LVDRSTF_FLAG flags to 0 as they may be in undefined state after POR
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TSB_RLM->RSTFLG0 &= ~(PINRSTF_FLAG | LVDRSTF_FLAG);
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}
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//concatenating RSTFLG1 and RSTFLG0 register contents
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reason_raw = ((TSB_RLM->RSTFLG1) << 8) | TSB_RLM->RSTFLG0 ;
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return reason_raw;
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}
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void hal_reset_reason_clear(void)
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{
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//clear both reset reason registers RSTFLG1 and RSTFLG0
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TSB_RLM->RSTFLG0 = CLEAR_FLAGS;
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TSB_RLM->RSTFLG1 = CLEAR_FLAGS;
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}
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