a8ba31871e
- BLE peripheral applications - dr_piezo and bladder_patch projects Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
/*
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Copyright (c) 2009-2021 ARM Limited. All rights reserved.
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SPDX-License-Identifier: Apache-2.0
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Licensed under the Apache License, Version 2.0 (the License); you may
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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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www.apache.org/licenses/LICENSE-2.0
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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, WITHOUT
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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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NOTICE: This file has been modified by Nordic Semiconductor ASA.
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*/
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#ifndef SYSTEM_NRF52_APPROTECT_H
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#define SYSTEM_NRF52_APPROTECT_H
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#include "nrf.h"
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#include "nrf_erratas.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Function that handles firmware-driven enabling or disabling of APPROTECT on devices where it is supported.
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If ENABLE_APPROTECT is defined, the FW will lock the fw branch of the APPROTECT mechanism,
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preventing it from being opened.
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Otherwise, the fw branch state is loaded from UICR, emulating the legacy APPROTECT behavior.
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The same mechanism is implemented for SECURE APPROTECT, with the macros
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ENABLE_SECURE_APPROTECT and ENABLE_SECURE_APPROTECT_USER_HANDLING. */
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static inline void nrf52_handle_approtect(void)
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{
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#if NRF52_ERRATA_249_PRESENT
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#if defined (ENABLE_APPROTECT)
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if (nrf52_errata_249())
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{
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/* Prevent processor from unlocking APPROTECT soft branch after this point. */
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NRF_APPROTECT->FORCEPROTECT = APPROTECT_FORCEPROTECT_FORCEPROTECT_Force;
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}
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#else
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if (nrf52_errata_249())
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{
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/* Load APPROTECT soft branch from UICR.
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If UICR->APPROTECT is disabled, POWER->APPROTECT will be disabled. */
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NRF_APPROTECT->DISABLE = NRF_UICR->APPROTECT;
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}
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#endif
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#endif
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* SYSTEM_NRF52_APPROTECT_H */
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