Mouse code for the MacroRat
mbed-dev/targets/TARGET_NORDIC/TARGET_NRF5_SDK13/rtc_api.c
- Committer:
- sahilmgandhi
- Date:
- 2017-05-14
- Revision:
- 18:6a4db94011d3
File content as of revision 18:6a4db94011d3:
/* * Copyright (c) 2013 Nordic Semiconductor ASA * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this list * of conditions and the following disclaimer. * * 2. Redistributions in binary form, except as embedded into a Nordic Semiconductor ASA * integrated circuit in a product or a software update for such product, must reproduce * the above copyright notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the distribution. * * 3. Neither the name of Nordic Semiconductor ASA nor the names of its contributors may be * used to endorse or promote products derived from this software without specific prior * written permission. * * 4. This software, with or without modification, must only be used with a * Nordic Semiconductor ASA integrated circuit. * * 5. Any software provided in binary or object form under this license must not be reverse * engineered, decompiled, modified and/or disassembled. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #include "rtc_api.h" #if DEVICE_RTC #include "common_rtc.h" #include "nrf_drv_clock.h" #include "app_util_platform.h" static time_t m_time_base; void rtc_init(void) { common_rtc_init(); } void rtc_free(void) { // A common counter is used for RTC, lp_ticker and us_ticker, so it can't be // disabled here, but this does not cause any extra cost. Besides, currently // this function is not used by RTC API in mbed-drivers. } int rtc_isenabled(void) { return m_common_rtc_enabled; } static uint32_t rtc_seconds_get(void) { // Convert current counter value to seconds. uint32_t seconds = nrf_rtc_counter_get(COMMON_RTC_INSTANCE) / RTC_INPUT_FREQ; // Add proper amount of seconds for each registered overflow of the counter. uint32_t seconds_per_overflow = (1uL << RTC_COUNTER_BITS) / RTC_INPUT_FREQ; return (seconds + (m_common_rtc_overflows * seconds_per_overflow)); } time_t rtc_read(void) { return m_time_base + rtc_seconds_get(); } void rtc_write(time_t t) { uint32_t seconds; do { seconds = rtc_seconds_get(); m_time_base = t - seconds; // If the number of seconds indicated by the counter changed during the // update of the time base, just repeat the update, now using the new // number of seconds. } while (seconds != rtc_seconds_get()); } #endif // DEVICE_RTC