119 lines
3.1 KiB
C
119 lines
3.1 KiB
C
/* Copyright (c) 2015 Nordic Semiconductor. All Rights Reserved.
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*
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* The information contained herein is property of Nordic Semiconductor ASA.
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* Terms and conditions of usage are described in detail in NORDIC
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* SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
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*
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* Licensees are granted free, non-transferable use of the information. NO
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* WARRANTY of ANY KIND is provided. This heading must NOT be removed from
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* the file.
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*
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*/
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#include "nrf_drv_wdt.h"
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#include "nrf_drv_common.h"
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#include "nrf_error.h"
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#include "nrf_assert.h"
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#include "nrf_wdt.h"
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#include "app_util_platform.h"
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#include <stdbool.h>
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#include <stdint.h>
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/**@brief WDT event handler. */
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static nrf_wdt_event_handler_t m_wdt_event_handler;
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/**@brief WDT state. */
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static nrf_drv_state_t m_state;
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/**@brief WDT alloc table. */
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static uint32_t m_alloc_index;
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static const nrf_drv_wdt_config_t m_default_config = NRF_DRV_WDT_DEAFULT_CONFIG;
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/**@brief WDT interrupt handler. */
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void WDT_IRQHandler(void)
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{
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if (nrf_wdt_int_enable_check(NRF_WDT_INT_TIMEOUT_MASK) == true)
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{
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nrf_wdt_event_clear(NRF_WDT_EVENT_TIMEOUT);
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m_wdt_event_handler();
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}
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}
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ret_code_t nrf_drv_wdt_init(nrf_drv_wdt_config_t const * p_config,
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nrf_wdt_event_handler_t wdt_event_handler)
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{
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ASSERT(wdt_event_handler != NULL);
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m_wdt_event_handler = wdt_event_handler;
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if (m_state == NRF_DRV_STATE_UNINITIALIZED)
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{
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m_state = NRF_DRV_STATE_INITIALIZED;
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}
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else
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{
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return NRF_ERROR_INVALID_STATE; // WDT already initialized
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}
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if (p_config == NULL)
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{
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p_config = &m_default_config;
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}
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nrf_wdt_behaviour_set(p_config->behaviour);
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nrf_wdt_reload_value_set((p_config->reload_value * 32768) / 1000);
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nrf_drv_common_irq_enable(WDT_IRQn, p_config->interrupt_priority);
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return NRF_SUCCESS;
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}
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void nrf_drv_wdt_enable(void)
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{
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ASSERT(m_alloc_index != 0);
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ASSERT(m_state == NRF_DRV_STATE_INITIALIZED);
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nrf_wdt_int_enable(NRF_WDT_INT_TIMEOUT_MASK);
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nrf_wdt_task_trigger(NRF_WDT_TASK_START);
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m_state = NRF_DRV_STATE_POWERED_ON;
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}
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void nrf_drv_wdt_feed(void)
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{
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ASSERT(m_state == NRF_DRV_STATE_POWERED_ON);
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for(uint32_t i = 0; i < m_alloc_index; i++)
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{
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nrf_wdt_reload_request_set((nrf_wdt_rr_register_t)(NRF_WDT_RR0 + i));
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}
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}
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ret_code_t nrf_drv_wdt_channel_alloc(nrf_drv_wdt_channel_id * p_channel_id)
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{
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ret_code_t result;
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ASSERT(p_channel_id);
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ASSERT(m_state == NRF_DRV_STATE_INITIALIZED);
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CRITICAL_REGION_ENTER();
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if (m_alloc_index < NRF_WDT_CHANNEL_NUMBER)
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{
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*p_channel_id = (nrf_drv_wdt_channel_id)(NRF_WDT_RR0 + m_alloc_index);
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m_alloc_index++;
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nrf_wdt_reload_request_enable(*p_channel_id);
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result = NRF_SUCCESS;
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}
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else
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{
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result = NRF_ERROR_NO_MEM;
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}
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CRITICAL_REGION_EXIT();
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return result;
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}
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void nrf_drv_wdt_channel_feed(nrf_drv_wdt_channel_id channel_id)
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{
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ASSERT(m_state == NRF_DRV_STATE_POWERED_ON);
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nrf_wdt_reload_request_set(channel_id);
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}
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