Diff: RTC/RTC.cpp

Revision:

0:f77369cabd75

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/RTC/RTC.cpp	Sun Dec 18 08:16:01 2022 +0000
@@ -0,0 +1,245 @@
+#include "RTC.h"
+
+FunctionPointer RTC::attachCB[6];
+FunctionPointer RTC::alarmCB;
+
+bool RTC::initialRun = true;
+
+
+void RTC::attach(void (*function)(void), TimeUnit interval)
+{
+    //Set the function pointer
+    attachCB[interval].attach(function);
+    _attach(interval);
+}
+
+template<typename T>
+void RTC::attach(T *object, void (T::*member)(void), TimeUnit interval)
+{
+    //Set the function pointer
+    attachCB[interval].attach(object, member);
+    _attach(interval);
+}
+
+
+void RTC::_attach(TimeUnit interval)
+{
+    //Disable IRQs, dont want them to happen while busy here
+    NVIC_DisableIRQ(RTC_IRQn);
+
+    //Set the IRQ vector
+    NVIC_SetVector(RTC_IRQn, (uint32_t)&RTC::IRQHandler);
+
+    //If this is the first time it is called, delete all interrupt sources
+    //We need to do this because RTC unit isnt affected by system resets apparently
+    if (initialRun) {
+        LPC_RTC->CIIR = 0;
+        LPC_RTC->AMR = 255;
+        initialRun = false;
+        LPC_RTC->ILR = 0x03;
+    }
+
+    //Set/reset correct interrupt source
+    switch (interval) {
+        case Second:
+            LPC_RTC->CIIR |= 1;
+            break;
+        case Minute:
+            LPC_RTC->CIIR |= 2;
+            break;
+        case Hour:
+            LPC_RTC->CIIR |= 4;
+            break;
+        case Day:
+            LPC_RTC->CIIR |= 56;
+            break;
+        case Month:
+            LPC_RTC->CIIR |= 64;
+            break;
+        case Year:
+            LPC_RTC->CIIR |= 128;
+            break;
+    }
+
+
+    //We can always enable IRQs, since if all IRQs are disabled by the user the RTC hardware will never raise its IRQ flag anyway
+    NVIC_EnableIRQ(RTC_IRQn);
+}
+
+void RTC::detach(TimeUnit interval)
+{
+    switch (interval) {
+        case Second:
+            LPC_RTC->CIIR &= ~1;
+            break;
+        case Minute:
+            LPC_RTC->CIIR &= ~2;
+            break;
+        case Hour:
+            LPC_RTC->CIIR &= ~4;
+            break;
+        case Day:
+            LPC_RTC->CIIR &= ~56;
+            break;
+        case Month:
+            LPC_RTC->CIIR &= ~64;
+            break;
+        case Year:
+            LPC_RTC->CIIR &= ~128;
+            break;
+    }
+    attachCB[interval].attach(NULL);
+}
+
+
+void RTC::alarm(void (*function)(void), tm alarmTime)
+{
+    //Set the function pointer
+    alarmCB.attach(function);
+    _alarm(alarmTime);
+}
+
+template<typename T>
+void RTC::alarm(T *object, void (T::*member)(void), tm alarmTime)
+{
+    //Set the function pointer
+    alarmCB.attach(object, member);
+    _alarm(alarmTime);
+}
+
+
+void RTC::_alarm(tm alarmTime)
+{
+    //Disable IRQs, dont want them to happen while busy here
+    NVIC_DisableIRQ(RTC_IRQn);
+
+    //Set the IRQ vector
+    NVIC_SetVector(RTC_IRQn, (uint32_t)&RTC::IRQHandler);
+
+    //If this is the first time it is called, delete all interrupt sources
+    //We need to do this because RTC unit isnt affected by system resets apparently
+    if (initialRun) {
+        LPC_RTC->CIIR = 0;
+        LPC_RTC->AMR = 255;
+        initialRun = false;
+        LPC_RTC->ILR = 0x03;
+    }
+
+    //Set the alarm register
+    if ((alarmTime.tm_sec>=0) && (alarmTime.tm_sec<60)) {
+        LPC_RTC->ALSEC = alarmTime.tm_sec;
+        LPC_RTC->AMR &= ~1;
+    } else
+        LPC_RTC->AMR |= 1;
+
+    if ((alarmTime.tm_min>=0) && (alarmTime.tm_min<60)) {
+        LPC_RTC->ALMIN = alarmTime.tm_min;
+        LPC_RTC->AMR &= ~2;
+    } else
+        LPC_RTC->AMR |= 2;
+
+    if ((alarmTime.tm_hour>=0) && (alarmTime.tm_hour<24)) {
+        LPC_RTC->ALHOUR = alarmTime.tm_hour;
+        LPC_RTC->AMR &= ~4;
+    } else
+        LPC_RTC->AMR |= 4;
+
+    if ((alarmTime.tm_mday>=1) && (alarmTime.tm_mday<32)) {
+        LPC_RTC->ALDOM = alarmTime.tm_mday;
+        LPC_RTC->AMR &= ~8;
+    } else
+        LPC_RTC->AMR |= 8;
+
+    if ((alarmTime.tm_wday>=0) && (alarmTime.tm_wday<7)) {
+        LPC_RTC->ALDOW = alarmTime.tm_wday;
+        LPC_RTC->AMR &= ~16;
+    } else
+        LPC_RTC->AMR |= 16;
+
+    if ((alarmTime.tm_yday>0) && (alarmTime.tm_yday<367)) {
+        LPC_RTC->ALDOY = alarmTime.tm_yday;
+        LPC_RTC->AMR &= ~32;
+    } else
+        LPC_RTC->AMR |= 32;
+
+    if ((alarmTime.tm_mon>=0) && (alarmTime.tm_mon<12)) {
+        LPC_RTC->ALMON = alarmTime.tm_mon + 1;   //Different definitions
+        LPC_RTC->AMR &= ~64;
+    } else
+        LPC_RTC->AMR |= 64;
+
+    if ((alarmTime.tm_year>=0) && (alarmTime.tm_year<1000)) {
+        LPC_RTC->ALYEAR = alarmTime.tm_year + 1900;   //Different definitions
+        LPC_RTC->AMR &= ~128;
+    } else
+        LPC_RTC->AMR |= 128;
+
+    //DOY and DOW register normally not set
+    time_t t = time(NULL);
+    LPC_RTC->DOY = localtime(&t)->tm_yday+1;
+    LPC_RTC->DOW = localtime(&t)->tm_wday;
+
+    //We can always enable IRQs, since if all IRQs are disabled by the user the RTC hardware will never raise its IRQ flag anyway
+    NVIC_EnableIRQ(RTC_IRQn);
+}
+
+void RTC::alarmOff( void )
+{
+    LPC_RTC->AMR = 255;
+    alarmCB.attach(NULL);
+}
+
+
+void RTC::IRQHandler( void )
+{
+    if ((LPC_RTC->ILR & 0x01) == 0x01) {
+        //Attach interrupt
+        attachCB[0].call();
+
+        //If seconds zero
+        if (LPC_RTC->SEC == 0) {
+            attachCB[1].call();
+
+            //If minutes zero
+            if (LPC_RTC->MIN == 0) {
+                attachCB[2].call();
+
+                //If hours zero
+                if (LPC_RTC->HOUR == 0) {
+                    attachCB[3].call();
+
+                    //If days zero
+                    if (LPC_RTC->DOM == 0) {
+                        attachCB[4].call();
+
+                        //If month zero
+                        if (LPC_RTC->MONTH == 0)
+                            attachCB[5].call();
+                    }
+                }
+            }
+        }
+    }
+
+    if ((LPC_RTC->ILR & 0x02) == 0x02)
+        alarmCB.call();
+
+
+
+    //Reset interrupt status
+    LPC_RTC->ILR = 0x03;
+}
+
+tm RTC::getDefaultTM( void ) {
+    struct tm t;
+    t.tm_sec = -1;   
+    t.tm_min = -1;    
+    t.tm_hour = -1;   
+    t.tm_mday = -1;
+    t.tm_wday = -1;
+    t.tm_yday = -1;   
+    t.tm_mon = -1;    
+    t.tm_year = -1; 
+    
+    return t;
+    }
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