neil hancock / RTC

Support KL25z requirements

Dependents:   kl25z_Usb_Logger

Fork of RTC by Erik -

RTC.cpp@0:39767ffe05e6, 2012-12-05 (annotated)

Committer:
Sissors
Date:
Wed Dec 05 21:03:44 2012 +0000
Revision:
0:39767ffe05e6
Child:
1:be9d058ee5c7
Version 1, lacks comments, seems to work

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Sissors 0:39767ffe05e6 1 #include "RTC.h"
Sissors 0:39767ffe05e6 2
Sissors 0:39767ffe05e6 3 FunctionPointer RTC::attachCB[6];
Sissors 0:39767ffe05e6 4 FunctionPointer RTC::alarmCB;
Sissors 0:39767ffe05e6 5
Sissors 0:39767ffe05e6 6 bool RTC::initialRun = true;
Sissors 0:39767ffe05e6 7
Sissors 0:39767ffe05e6 8 void RTC::attach(void (*function)(void), TimeUnit interval)
Sissors 0:39767ffe05e6 9 {
Sissors 0:39767ffe05e6 10 //Disable IRQs, dont want them to happen while busy here
Sissors 0:39767ffe05e6 11 NVIC_DisableIRQ(RTC_IRQn);
Sissors 0:39767ffe05e6 12
Sissors 0:39767ffe05e6 13 //Set the IRQ vector
Sissors 0:39767ffe05e6 14 NVIC_SetVector(RTC_IRQn, (uint32_t)&RTC::IRQHandler);
Sissors 0:39767ffe05e6 15
Sissors 0:39767ffe05e6 16 //If this is the first time it is called, delete all interrupt sources
Sissors 0:39767ffe05e6 17 //We need to do this because RTC unit isnt affected by system resets apparently
Sissors 0:39767ffe05e6 18 if (initialRun) {
Sissors 0:39767ffe05e6 19 LPC_RTC->CIIR = 0;
Sissors 0:39767ffe05e6 20 LPC_RTC->AMR = 255;
Sissors 0:39767ffe05e6 21 initialRun = false;
Sissors 0:39767ffe05e6 22 LPC_RTC->ILR = 0x03;
Sissors 0:39767ffe05e6 23 }
Sissors 0:39767ffe05e6 24
Sissors 0:39767ffe05e6 25 //Set the function pointer
Sissors 0:39767ffe05e6 26 attachCB[interval].attach(function);
Sissors 0:39767ffe05e6 27
Sissors 0:39767ffe05e6 28
Sissors 0:39767ffe05e6 29 //Set/reset correct interrupt source
Sissors 0:39767ffe05e6 30 if (function == NULL) {
Sissors 0:39767ffe05e6 31 switch (interval) {
Sissors 0:39767ffe05e6 32 case Second:
Sissors 0:39767ffe05e6 33 LPC_RTC->CIIR &= ~1;
Sissors 0:39767ffe05e6 34 break;
Sissors 0:39767ffe05e6 35 case Minute:
Sissors 0:39767ffe05e6 36 LPC_RTC->CIIR &= ~2;
Sissors 0:39767ffe05e6 37 break;
Sissors 0:39767ffe05e6 38 case Hour:
Sissors 0:39767ffe05e6 39 LPC_RTC->CIIR &= ~4;
Sissors 0:39767ffe05e6 40 break;
Sissors 0:39767ffe05e6 41 case Day:
Sissors 0:39767ffe05e6 42 LPC_RTC->CIIR &= ~56;
Sissors 0:39767ffe05e6 43 break;
Sissors 0:39767ffe05e6 44 case Month:
Sissors 0:39767ffe05e6 45 LPC_RTC->CIIR &= ~64;
Sissors 0:39767ffe05e6 46 break;
Sissors 0:39767ffe05e6 47 case Year:
Sissors 0:39767ffe05e6 48 LPC_RTC->CIIR &= ~128;
Sissors 0:39767ffe05e6 49 break;
Sissors 0:39767ffe05e6 50 }
Sissors 0:39767ffe05e6 51 } else {
Sissors 0:39767ffe05e6 52 switch (interval) {
Sissors 0:39767ffe05e6 53 case Second:
Sissors 0:39767ffe05e6 54 LPC_RTC->CIIR |= 1;
Sissors 0:39767ffe05e6 55 break;
Sissors 0:39767ffe05e6 56 case Minute:
Sissors 0:39767ffe05e6 57 LPC_RTC->CIIR |= 2;
Sissors 0:39767ffe05e6 58 break;
Sissors 0:39767ffe05e6 59 case Hour:
Sissors 0:39767ffe05e6 60 LPC_RTC->CIIR |= 4;
Sissors 0:39767ffe05e6 61 break;
Sissors 0:39767ffe05e6 62 case Day:
Sissors 0:39767ffe05e6 63 LPC_RTC->CIIR |= 56;
Sissors 0:39767ffe05e6 64 break;
Sissors 0:39767ffe05e6 65 case Month:
Sissors 0:39767ffe05e6 66 LPC_RTC->CIIR |= 64;
Sissors 0:39767ffe05e6 67 break;
Sissors 0:39767ffe05e6 68 case Year:
Sissors 0:39767ffe05e6 69 LPC_RTC->CIIR |= 128;
Sissors 0:39767ffe05e6 70 break;
Sissors 0:39767ffe05e6 71 }
Sissors 0:39767ffe05e6 72 }
Sissors 0:39767ffe05e6 73
Sissors 0:39767ffe05e6 74 //We can always enable IRQs, since if all IRQs are disabled by the user the RTC hardware will never raise its IRQ flag anyway
Sissors 0:39767ffe05e6 75 NVIC_EnableIRQ(RTC_IRQn);
Sissors 0:39767ffe05e6 76 }
Sissors 0:39767ffe05e6 77
Sissors 0:39767ffe05e6 78
Sissors 0:39767ffe05e6 79 void RTC::alarm(void (*function)(void), tm time)
Sissors 0:39767ffe05e6 80 {
Sissors 0:39767ffe05e6 81 //Disable IRQs, dont want them to happen while busy here
Sissors 0:39767ffe05e6 82 NVIC_DisableIRQ(RTC_IRQn);
Sissors 0:39767ffe05e6 83
Sissors 0:39767ffe05e6 84 //Set the IRQ vector
Sissors 0:39767ffe05e6 85 NVIC_SetVector(RTC_IRQn, (uint32_t)&RTC::IRQHandler);
Sissors 0:39767ffe05e6 86
Sissors 0:39767ffe05e6 87 //If this is the first time it is called, delete all interrupt sources
Sissors 0:39767ffe05e6 88 //We need to do this because RTC unit isnt affected by system resets apparently
Sissors 0:39767ffe05e6 89 if (initialRun) {
Sissors 0:39767ffe05e6 90 LPC_RTC->CIIR = 0;
Sissors 0:39767ffe05e6 91 LPC_RTC->AMR = 255;
Sissors 0:39767ffe05e6 92 initialRun = false;
Sissors 0:39767ffe05e6 93 LPC_RTC->ILR = 0x03;
Sissors 0:39767ffe05e6 94 }
Sissors 0:39767ffe05e6 95
Sissors 0:39767ffe05e6 96 //Set the function pointer
Sissors 0:39767ffe05e6 97 alarmCB.attach(function);
Sissors 0:39767ffe05e6 98
Sissors 0:39767ffe05e6 99 //Set the alarm register
Sissors 0:39767ffe05e6 100 if ((time.tm_sec>=0) && (time.tm_sec<60)) {
Sissors 0:39767ffe05e6 101 LPC_RTC->ALSEC = time.tm_sec;
Sissors 0:39767ffe05e6 102 LPC_RTC->AMR &= ~1;
Sissors 0:39767ffe05e6 103 } else
Sissors 0:39767ffe05e6 104 LPC_RTC->AMR |= 1;
Sissors 0:39767ffe05e6 105
Sissors 0:39767ffe05e6 106 if ((time.tm_min>=0) && (time.tm_min<60)) {
Sissors 0:39767ffe05e6 107 LPC_RTC->ALMIN = time.tm_min;
Sissors 0:39767ffe05e6 108 LPC_RTC->AMR &= ~2;
Sissors 0:39767ffe05e6 109 } else
Sissors 0:39767ffe05e6 110 LPC_RTC->AMR |= 2;
Sissors 0:39767ffe05e6 111
Sissors 0:39767ffe05e6 112 if ((time.tm_hour>=0) && (time.tm_hour<24)) {
Sissors 0:39767ffe05e6 113 LPC_RTC->ALHOUR = time.tm_hour;
Sissors 0:39767ffe05e6 114 LPC_RTC->AMR &= ~4;
Sissors 0:39767ffe05e6 115 } else
Sissors 0:39767ffe05e6 116 LPC_RTC->AMR |= 4;
Sissors 0:39767ffe05e6 117
Sissors 0:39767ffe05e6 118 if ((time.tm_mday>=1) && (time.tm_mday<32)) {
Sissors 0:39767ffe05e6 119 LPC_RTC->ALDOM = time.tm_mday;
Sissors 0:39767ffe05e6 120 LPC_RTC->AMR &= ~8;
Sissors 0:39767ffe05e6 121 } else
Sissors 0:39767ffe05e6 122 LPC_RTC->AMR |= 8;
Sissors 0:39767ffe05e6 123
Sissors 0:39767ffe05e6 124 if ((time.tm_mon>=0) && (time.tm_mon<12)) {
Sissors 0:39767ffe05e6 125 LPC_RTC->ALMON = time.tm_mon + 1; //Different definitions
Sissors 0:39767ffe05e6 126 LPC_RTC->AMR &= ~64;
Sissors 0:39767ffe05e6 127 } else
Sissors 0:39767ffe05e6 128 LPC_RTC->AMR |= 64;
Sissors 0:39767ffe05e6 129
Sissors 0:39767ffe05e6 130 if ((time.tm_year>=0) && (time.tm_year<1000)) {
Sissors 0:39767ffe05e6 131 LPC_RTC->ALYEAR = time.tm_year + 1900; //Different definitions
Sissors 0:39767ffe05e6 132 LPC_RTC->AMR &= ~128;
Sissors 0:39767ffe05e6 133 } else
Sissors 0:39767ffe05e6 134 LPC_RTC->AMR |= 128;
Sissors 0:39767ffe05e6 135
Sissors 0:39767ffe05e6 136 //We can always enable IRQs, since if all IRQs are disabled by the user the RTC hardware will never raise its IRQ flag anyway
Sissors 0:39767ffe05e6 137 NVIC_EnableIRQ(RTC_IRQn);
Sissors 0:39767ffe05e6 138 }
Sissors 0:39767ffe05e6 139
Sissors 0:39767ffe05e6 140 void RTC::alarmOff( void ) {
Sissors 0:39767ffe05e6 141 LPC_RTC->AMR = 255;
Sissors 0:39767ffe05e6 142 }
Sissors 0:39767ffe05e6 143
Sissors 0:39767ffe05e6 144
Sissors 0:39767ffe05e6 145 void RTC::IRQHandler( void )
Sissors 0:39767ffe05e6 146 {
Sissors 0:39767ffe05e6 147 if ((LPC_RTC->ILR & 0x01) == 0x01) {
Sissors 0:39767ffe05e6 148 //Attach interrupt
Sissors 0:39767ffe05e6 149 attachCB[0].call();
Sissors 0:39767ffe05e6 150
Sissors 0:39767ffe05e6 151 //If seconds zero
Sissors 0:39767ffe05e6 152 if (LPC_RTC->SEC == 0) {
Sissors 0:39767ffe05e6 153 attachCB[1].call();
Sissors 0:39767ffe05e6 154
Sissors 0:39767ffe05e6 155 //If minutes zero
Sissors 0:39767ffe05e6 156 if (LPC_RTC->MIN == 0) {
Sissors 0:39767ffe05e6 157 attachCB[2].call();
Sissors 0:39767ffe05e6 158
Sissors 0:39767ffe05e6 159 //If hours zero
Sissors 0:39767ffe05e6 160 if (LPC_RTC->HOUR == 0) {
Sissors 0:39767ffe05e6 161 attachCB[3].call();
Sissors 0:39767ffe05e6 162
Sissors 0:39767ffe05e6 163 //If days zero
Sissors 0:39767ffe05e6 164 if (LPC_RTC->DOM == 0) {
Sissors 0:39767ffe05e6 165 attachCB[4].call();
Sissors 0:39767ffe05e6 166
Sissors 0:39767ffe05e6 167 //If month zero
Sissors 0:39767ffe05e6 168 if (LPC_RTC->MONTH == 0)
Sissors 0:39767ffe05e6 169 attachCB[5].call();
Sissors 0:39767ffe05e6 170 }
Sissors 0:39767ffe05e6 171 }
Sissors 0:39767ffe05e6 172 }
Sissors 0:39767ffe05e6 173 }
Sissors 0:39767ffe05e6 174 }
Sissors 0:39767ffe05e6 175
Sissors 0:39767ffe05e6 176 if ((LPC_RTC->ILR & 0x02) == 0x02)
Sissors 0:39767ffe05e6 177 alarmCB.call();
Sissors 0:39767ffe05e6 178
Sissors 0:39767ffe05e6 179
Sissors 0:39767ffe05e6 180
Sissors 0:39767ffe05e6 181 //Reset interrupt status
Sissors 0:39767ffe05e6 182 LPC_RTC->ILR = 0x03;
Sissors 0:39767ffe05e6 183 }