Mouse code for the MacroRat
mbed-dev/targets/TARGET_NORDIC/TARGET_MCU_NRF51822/TARGET_DELTA_DFCM_NNN40/rtc_api.c
- Committer:
- sahilmgandhi
- Date:
- 2017-06-03
- Revision:
- 46:b156ef445742
- Parent:
- 18:6a4db94011d3
File content as of revision 46:b156ef445742:
/* mbed Microcontroller Library * Copyright (c) 2006-2013 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "rtc_api.h" #define LFCLK_FREQUENCY (32768UL) #define RTC0_COUNTER_PRESCALER ((LFCLK_FREQUENCY/8) - 1) #define COMPARE_COUNTERTIME (691200UL) //86400 x 8 time_t initTime; void rtc_init(void) { NVIC_EnableIRQ(RTC0_IRQn); // Enable Interrupt for the RTC in the core. //NRF_RTC0->TASKS_STOP =1; NRF_RTC0->PRESCALER = RTC0_COUNTER_PRESCALER; // Set prescaler to a TICK of RTC_FREQUENCY. NRF_RTC0->CC[0] = COMPARE_COUNTERTIME; // Compare0 after approx COMPARE_COUNTERTIME seconds. // Enable COMPARE0 event and COMPARE0 interrupt: NRF_RTC0->EVTENSET = RTC_EVTENSET_COMPARE0_Msk; NRF_RTC0->INTENSET = RTC_INTENSET_COMPARE0_Msk; NRF_RTC0->TASKS_START = 1; } void rtc_free(void) { // [TODO] } /* * Little check routine to see if the RTC has been enabled * * Clock Control Register * RTC_CCR[0] : 0 = Disabled, 1 = Enabled * */ int rtc_isenabled(void) { // [TODO] return(((NRF_RTC0->TASKS_START) & 0x01) != 0); } time_t rtc_read(void) { time_t t = initTime; t += (86400*NRF_RTC0->EVENTS_COMPARE[0]); t += (int)((NRF_RTC0->COUNTER)/8); return(t); } void rtc_write(time_t t) { // Convert the time in to a tm // Pause clock, and clear counter register (clears us count) NRF_RTC0->TASKS_STOP = 1; initTime = t; // Restart clock NRF_RTC0->TASKS_START = 1; }