90 lines
2.2 KiB
C
Executable File
90 lines
2.2 KiB
C
Executable File
/*
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* Copyright (c) 2020 Fingerprint Cards AB
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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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* https://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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/**
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* @file platform_timebase.c
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* @brief timebase interface functions
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*/
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#include <stdint.h>
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#include "nrf_drv_systick.h"
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#include "nrf.h"
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#include "nrf_drv_timer.h"
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#include "nrfx_config.h"
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const nrf_drv_timer_t TIMER_LED = NRF_DRV_TIMER_INSTANCE(0);
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static volatile uint32_t systick;
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/**
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* @brief Handler for timer events.
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*/
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static void timer_event_handler(nrf_timer_event_t event_type, void* p_context)
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{
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switch (event_type)
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{
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case NRF_TIMER_EVENT_COMPARE0:
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systick++;
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break;
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default:
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//Do nothing.
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break;
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}
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}
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void platform_timebase_init(void)
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{
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uint32_t time_ms = 1; //Time (in miliseconds) between consecutive compare events.
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uint32_t time_ticks;
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uint32_t err_code = NRF_SUCCESS;
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nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;
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err_code = nrf_drv_timer_init(&TIMER_LED, &timer_cfg, timer_event_handler);
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APP_ERROR_CHECK(err_code);
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time_ticks = nrf_drv_timer_ms_to_ticks(&TIMER_LED, time_ms);
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nrf_drv_timer_extended_compare(
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&TIMER_LED, NRF_TIMER_CC_CHANNEL0, time_ticks, NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK, true);
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nrf_drv_timer_enable(&TIMER_LED);
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}
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void platform_timebase_busy_wait(uint32_t delay)
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{
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uint32_t start;
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uint32_t delay_internal = 0;
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/* Ensure minimum delay or skip if delay is zero*/
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if (delay) {
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delay_internal = delay + 1;
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start = systick;
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while ((systick - start) < delay_internal) {
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}
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}
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}
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uint32_t platform_timebase_get_tick(void)
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{
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return systick;
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}
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