122 lines
3.7 KiB
C
122 lines
3.7 KiB
C
/**
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* Copyright (c) 2017 - 2020, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "nrf_bootloader_wdt.h"
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#include "nrf_wdt.h"
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#include "nrf_bootloader_dfu_timers.h"
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#include "nrf_log_ctrl.h"
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#define NRF_LOG_MODULE_NAME nrf_bootloader_wdt
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#include "nrf_log.h"
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NRF_LOG_MODULE_REGISTER();
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static void wdt_feed(void)
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{
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if (nrf_wdt_started())
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{
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for (nrf_wdt_rr_register_t i = NRF_WDT_RR0; i < NRF_WDT_RR7; i++)
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{
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if (nrf_wdt_reload_request_is_enabled(i))
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{
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nrf_wdt_reload_request_set(i);
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}
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}
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}
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}
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static void wdt_feed_timer_handler(void)
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{
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NRF_LOG_INFO("Internal feed");
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wdt_feed();
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}
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void WDT_IRQHandler(void)
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{
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nrf_wdt_event_clear(NRF_WDT_EVENT_TIMEOUT);
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NRF_LOG_FINAL_FLUSH();
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}
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#define MAX_FLASH_OP_TIME_TICKS 3200 // ~100 ms
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void nrf_bootloader_wdt_init(void)
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{
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static bool initialized = false;
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if (initialized)
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{
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return;
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}
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if (nrf_wdt_started())
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{
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uint32_t wdt_ticks = nrf_wdt_reload_value_get();
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NRF_LOG_INFO("WDT enabled CRV:%d ticks", wdt_ticks);
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//wdt_ticks must be reduced to feed the watchdog before the timeout.
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uint32_t reduced_timeout_ticks = MAX((int32_t)wdt_ticks - MAX_FLASH_OP_TIME_TICKS,
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NRF_BOOTLOADER_MIN_TIMEOUT_TICKS);
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/* initial watchdog feed */
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wdt_feed();
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NRF_LOG_INFO("Starting a timer (%d ticks) for feeding watchdog.", reduced_timeout_ticks);
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nrf_bootloader_wdt_feed_timer_start(reduced_timeout_ticks, wdt_feed_timer_handler);
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NVIC_EnableIRQ(WDT_IRQn);
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}
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else
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{
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NRF_LOG_INFO("WDT is not enabled");
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}
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initialized = true;
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}
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void nrf_bootloader_wdt_feed(void)
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{
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if (nrf_wdt_started())
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{
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wdt_feed();
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}
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}
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