Mouse code for the MacroRat
mbed-dev/targets/TARGET_NORDIC/TARGET_MCU_NRF51822/TARGET_DELTA_DFCM_NNN40/rtc_api.c@46:b156ef445742, 2017-06-03 (annotated)
- Committer:
- sahilmgandhi
- Date:
- Sat Jun 03 00:22:44 2017 +0000
- Revision:
- 46:b156ef445742
- Parent:
- 18:6a4db94011d3
Final code for internal battlebot competition.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
sahilmgandhi | 18:6a4db94011d3 | 1 | /* mbed Microcontroller Library |
sahilmgandhi | 18:6a4db94011d3 | 2 | * Copyright (c) 2006-2013 ARM Limited |
sahilmgandhi | 18:6a4db94011d3 | 3 | * |
sahilmgandhi | 18:6a4db94011d3 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
sahilmgandhi | 18:6a4db94011d3 | 5 | * you may not use this file except in compliance with the License. |
sahilmgandhi | 18:6a4db94011d3 | 6 | * You may obtain a copy of the License at |
sahilmgandhi | 18:6a4db94011d3 | 7 | * |
sahilmgandhi | 18:6a4db94011d3 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
sahilmgandhi | 18:6a4db94011d3 | 9 | * |
sahilmgandhi | 18:6a4db94011d3 | 10 | * Unless required by applicable law or agreed to in writing, software |
sahilmgandhi | 18:6a4db94011d3 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
sahilmgandhi | 18:6a4db94011d3 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
sahilmgandhi | 18:6a4db94011d3 | 13 | * See the License for the specific language governing permissions and |
sahilmgandhi | 18:6a4db94011d3 | 14 | * limitations under the License. |
sahilmgandhi | 18:6a4db94011d3 | 15 | */ |
sahilmgandhi | 18:6a4db94011d3 | 16 | #include "rtc_api.h" |
sahilmgandhi | 18:6a4db94011d3 | 17 | |
sahilmgandhi | 18:6a4db94011d3 | 18 | |
sahilmgandhi | 18:6a4db94011d3 | 19 | #define LFCLK_FREQUENCY (32768UL) |
sahilmgandhi | 18:6a4db94011d3 | 20 | #define RTC0_COUNTER_PRESCALER ((LFCLK_FREQUENCY/8) - 1) |
sahilmgandhi | 18:6a4db94011d3 | 21 | #define COMPARE_COUNTERTIME (691200UL) //86400 x 8 |
sahilmgandhi | 18:6a4db94011d3 | 22 | |
sahilmgandhi | 18:6a4db94011d3 | 23 | |
sahilmgandhi | 18:6a4db94011d3 | 24 | time_t initTime; |
sahilmgandhi | 18:6a4db94011d3 | 25 | |
sahilmgandhi | 18:6a4db94011d3 | 26 | void rtc_init(void) { |
sahilmgandhi | 18:6a4db94011d3 | 27 | |
sahilmgandhi | 18:6a4db94011d3 | 28 | NVIC_EnableIRQ(RTC0_IRQn); // Enable Interrupt for the RTC in the core. |
sahilmgandhi | 18:6a4db94011d3 | 29 | //NRF_RTC0->TASKS_STOP =1; |
sahilmgandhi | 18:6a4db94011d3 | 30 | NRF_RTC0->PRESCALER = RTC0_COUNTER_PRESCALER; // Set prescaler to a TICK of RTC_FREQUENCY. |
sahilmgandhi | 18:6a4db94011d3 | 31 | NRF_RTC0->CC[0] = COMPARE_COUNTERTIME; // Compare0 after approx COMPARE_COUNTERTIME seconds. |
sahilmgandhi | 18:6a4db94011d3 | 32 | |
sahilmgandhi | 18:6a4db94011d3 | 33 | // Enable COMPARE0 event and COMPARE0 interrupt: |
sahilmgandhi | 18:6a4db94011d3 | 34 | NRF_RTC0->EVTENSET = RTC_EVTENSET_COMPARE0_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 35 | NRF_RTC0->INTENSET = RTC_INTENSET_COMPARE0_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 36 | NRF_RTC0->TASKS_START = 1; |
sahilmgandhi | 18:6a4db94011d3 | 37 | } |
sahilmgandhi | 18:6a4db94011d3 | 38 | |
sahilmgandhi | 18:6a4db94011d3 | 39 | void rtc_free(void) { |
sahilmgandhi | 18:6a4db94011d3 | 40 | // [TODO] |
sahilmgandhi | 18:6a4db94011d3 | 41 | } |
sahilmgandhi | 18:6a4db94011d3 | 42 | |
sahilmgandhi | 18:6a4db94011d3 | 43 | /* |
sahilmgandhi | 18:6a4db94011d3 | 44 | * Little check routine to see if the RTC has been enabled |
sahilmgandhi | 18:6a4db94011d3 | 45 | * |
sahilmgandhi | 18:6a4db94011d3 | 46 | * Clock Control Register |
sahilmgandhi | 18:6a4db94011d3 | 47 | * RTC_CCR[0] : 0 = Disabled, 1 = Enabled |
sahilmgandhi | 18:6a4db94011d3 | 48 | * |
sahilmgandhi | 18:6a4db94011d3 | 49 | */ |
sahilmgandhi | 18:6a4db94011d3 | 50 | int rtc_isenabled(void) { |
sahilmgandhi | 18:6a4db94011d3 | 51 | // [TODO] return(((NRF_RTC0->TASKS_START) & 0x01) != 0); |
sahilmgandhi | 18:6a4db94011d3 | 52 | } |
sahilmgandhi | 18:6a4db94011d3 | 53 | |
sahilmgandhi | 18:6a4db94011d3 | 54 | time_t rtc_read(void) { |
sahilmgandhi | 18:6a4db94011d3 | 55 | |
sahilmgandhi | 18:6a4db94011d3 | 56 | time_t t = initTime; |
sahilmgandhi | 18:6a4db94011d3 | 57 | t += (86400*NRF_RTC0->EVENTS_COMPARE[0]); |
sahilmgandhi | 18:6a4db94011d3 | 58 | t += (int)((NRF_RTC0->COUNTER)/8); |
sahilmgandhi | 18:6a4db94011d3 | 59 | return(t); |
sahilmgandhi | 18:6a4db94011d3 | 60 | } |
sahilmgandhi | 18:6a4db94011d3 | 61 | |
sahilmgandhi | 18:6a4db94011d3 | 62 | void rtc_write(time_t t) { |
sahilmgandhi | 18:6a4db94011d3 | 63 | // Convert the time in to a tm |
sahilmgandhi | 18:6a4db94011d3 | 64 | |
sahilmgandhi | 18:6a4db94011d3 | 65 | // Pause clock, and clear counter register (clears us count) |
sahilmgandhi | 18:6a4db94011d3 | 66 | NRF_RTC0->TASKS_STOP = 1; |
sahilmgandhi | 18:6a4db94011d3 | 67 | |
sahilmgandhi | 18:6a4db94011d3 | 68 | initTime = t; |
sahilmgandhi | 18:6a4db94011d3 | 69 | // Restart clock |
sahilmgandhi | 18:6a4db94011d3 | 70 | NRF_RTC0->TASKS_START = 1; |
sahilmgandhi | 18:6a4db94011d3 | 71 | } |