Alarm Time

Thanks to Bruce & Toni
i have managed to get the DS1337 RTC to work perfectly
i used a PIC18F452 & A DS1337 I Connected an Led to Pin 3 to Gnd .
The led is on while the alarm time and the main RTC time don't match and of when the time match up.

'************************************************* ***************
'* Name : ALARM1.BAS *
'* Author : [SANTANA] *
'* Notice : Copyright (c) 2004 [select VIEW...EDITOR OPTIONS] *
'* : All Rights Reserved *
'* Date : 30/10/2004 *
'* Version : 1.0 *
'* Notes :THE PROGRAM USES A TRIGGERS AN ALARM WHEN THE *
'* :ALARM TIME SET BY THE USER MATCHS THAT OF THE RTC *
'* :ON PIN 3 OF A DS1337 *
'* :THE HRS:MINS & SECS MUST MATCH EXACTLY ON BOTH *
'* :THE MAIN RTC TIME AND THE ALARM TIME
'************************************************* ***************
DEFINE LOADER_USED 1 ' uses a bootloader
Include "Modedefs.Bas"
Define OSC 20
clear

@ __CONFIG _CONFIG1H, _OSCS_OFF_1H & _HS_OSC_1H

' Setup Hardware for uart
DEFINE HSER_BAUD 115200
DEFINE HSER_RCSTA 90h
DEFINE HSER_TXSTA 24h
DEFINE HSER_CLROERR 1

' LCD DEFINES
'============
DEFINE LCD_DREG PORTD ' Use Portd for LCD Data
DEFINE LCD_DBIT 4 ' Use Upper(4) 4 bits of Port
' PORTD-4 thru PORTD-7 connects to
' LCD DB4 thru LCD DB-7 respectively
DEFINE LCD_RSREG PORTE ' PORTE for RegisterSelect (RS) bit
DEFINE LCD_RSBIT 0 ' PORTE-0 pin for LCD's RS line
DEFINE LCD_EREG PORTE ' PORTE for Enable (E) bit
DEFINE LCD_EBIT 1 ' PORTE-1 pin for LCD's E line
DEFINE LCD_BITS 4 ' Using 4-bit bus
DEFINE LCD_LINES 2 ' Using 2 line Display
DEFINE LCD_COMMANDUS 2000 ' Command Delay (uS)
DEFINE LCD_DATAUS 50 ' Data Delay (uS)

'** DEFINE LCD Control Constants **
'====================================
I CON 254 ' Control Byte
Clr CON 1 ' Clear the display
Line1 CON 128 ' Point to beginning of line 1
Line2 CON 192 ' Point to beginning of line 2

' Clock Defines
' ----------------
DS_SCL VAR PORTC.3 ' I2C clock pin
DS_SDA VAR PORTC.4 ' I2C data pin
RTC CON %11010000 ' RTC device address (byte addressing)

' -------------- RTC Address definitions -----------------
SecReg CON $00 ' seconds address (00 - 59) ' MSB of SecReg must be set to a 0 to enable RTC
MinReg CON $01 ' minutes address (00 - 59)
HourReg CON $02 ' hours address (01 - 12) or (00 - 23)
DayReg CON $03 ' day address (1 - 7)
DateReg CON $04 ' date address (01 - 28/29, 30, 31)
MonthReg CON $05 ' month address (01 - 12)
YearReg CON $06 ' year address (00 - 99)

'Alarm 1 Address definitions
'===========================
Alm1sec CON $07 ' Alarm 1 seconds address (00 - 59)
Alm1min CON $08 ' Alarm 1 minutes address (00 - 59)
Alm1hr CON $09 ' Alarm 1 hours address (01 - 12) or (00 - 23)
Alm1Day CON $0A ' Alarm 1 day address (1 - 7)

'Alarm 2 Address definitions
'===========================
Alm2min CON $0B ' Alarm 2 minutes address (00 - 59)
Alm2hr CON $0C ' Alarm 2 hours address (01 - 12) or (00 - 23)
Alm2Day CON $0D ' Alarm 2 day address (1 - 7)
ContReg CON $0E ' control register
StatusReg CON $0F ' STATUS register

cntrl CON %00000011 ' sets the SQW/OUT to 1Hz pulse, logic level low
'set interupt on INTB (From pg 9 of data sheet)

sec VAR BYTE ' seconds
MINs VAR BYTE ' minutes
hr VAR BYTE ' hours
day VAR BYTE ' day
date VAR BYTE ' date
mon VAR BYTE ' month
yr VAR BYTE ' year

'ALARM1 VARIABLES
'===============
A1sec VAR BYTE ' seconds
A1MINs VAR BYTE ' minutes
A1hr VAR BYTE ' hours
A1day VAR BYTE ' day
flag var byte

' Initialise Hardware
' -------------------
ADCON1=7
TRISA =%00100000
TRISB =%11100111
TRISC =%10000001
TRISD =%00000000

Pause 1000
LCDOut I,Clr:Pause 30
LCDOut I,Line1+2," DS1337 TEST "
LCDOut I,Line2+2,"..Power On.. !!"
flag=0
GoSub SetTimeAndDate

' Main Program Loop
' -----------------
Loop:

I2CRead DS_SDA, DS_SCL, RTC, SecReg, [sec,MINs,hr,day,date,mon,yr]
I2CRead DS_SDA, DS_SCL, RTC, Alm1sec,[A1sec,A1MINs,A1hr,A1day]
I2Cread DS_SDA, DS_SCL, RTC, StatusReg,[flag]
LCDOut I,Clr
LCDOut I,Line1,"Alarm: ",HEX2 A1hr, ":", HEX2 A1MINs, ":", HEX2 A1sec
LCDOut I,Line2,"Time: ",HEX2 hr, ":", HEX2 MINs, ":", HEX2 sec

nap 5
if flag.0=1 then gosub Take_Reading

GoTo Loop
End

' Read Ds1337
' Display Section
' ---------------
Take_Reading:
LCDOut I,Clr
LCDOut I,Line1,"ALARM TRIGGERED"
Pause 1000 ' Allow Time for user to view
gosub SetTimeAndDate ' RESET TIMER
I2CWrite DS_SDA, DS_SCL, RTC, StatusReg,[%00000000]' clear status reg<------
PAUSE 10
return

SetTimeAndDate:
'=============
yr=0:date =0:mon =0:day=0:hr=0:mins=0:sec=0
A1sec=0:A1MINs=0:A1hr=0: A1day=0

' The constants below set the RTC to: 16:30:40 on 13-08-2004
'#################################################

yr=$04
mon=$08
date=$13
day=$01
hr=$16
mins=$30
sec=$40

'SET ALARM FOR 16:31:05
A1hr=$16
A1MINs=$31
A1sec=$05
A1day=$13

'Set the main Time

I2CWrite DS_SDA, DS_SCL, RTC, SecReg,[sec,mins,hr,day,date,mon,yr]
Pause 10
'Set the Alarm 1 Time

I2CWrite DS_SDA, DS_SCL, RTC, ContReg,[$20]
Pause 10

I2CWrite DS_SDA, DS_SCL, RTC, StatusReg,[%00000000]
PAUSE 10

I2CWrite DS_SDA, DS_SCL, RTC,Alm1sec,[A1sec,A1MINs,A1hr,A1day]
Pause 10
I2CWrite DS_SDA, DS_SCL, RTC, ContReg,[5]
Pause 10
Return

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