RTC (saat ) chipleri hakkında

[mhk]

Sevgili dostlar. Sizlerden ricam , Piyasada rahatça bulabileceğimiz , mikroişlemci ile haberleşmesi kolay , ucuz Real time clock entegreleri biliyorsanız yazarsanız sevinirim. Daha önce kullandığım Oki m6242 entegresi artık yokmuş , tasarımı ona göre yaptığım için problem oluştu. DS1302 piyasada yok olduğunu söylediler. Aslında dallasın entegreleri güzel ama bulabilirmiyiz bilmiyorum. İlginiz için teşekkürler.

[baba]

ds serisi alıp denemiştim.Standart sapması çok fazla %2 idi hatırladığım kadarıyla.ben pcf8583 kullanıyorum çok güzel hem de I2c.takvim kullanacaksan (otomatik gün takibi yani) pcf için rutin kullanman gerekli çünkü yıl yazacı yalnızca artıkyıl (4 yıl) kaydı tutuyor.ucuzluğu konusunda bir şey söyleyemem.bana göre çok ucuz.sanıyorum 1,5 dolar civarı.

[mmengi]

dostum mhk dediğin gibi DS1302 piyasa bulmak zor ben türkiye temsilcisinden numune aldım.Onun yerine DS1307 de kullanabilirsin.Piyasada bulunuyor fakat backup pilini şarj etmiyor ama pekte gerek kalmıyor lityum pil ile 5 seneden fazla  bilgi koruması sağlıyor.BABA'nın dediği gibi pcf8583 daha akıllı alarm özelliğide olması gerekiyor.

iyi çalışmalar.

[akaragoz]

Selam beyler
DS1302 bulunmaz bir entegre değil isteyene kıyamet gibi bulabiliriz.
Eğer moderatör arkadaşlar reklam saymazlarsa
İzmirde 2.Onur handa İNT-KOM Elektronikte var.
Tel 232-4259865
Ben onu kullanıyorum. Pek sapmasını göremedim. Eğer datasheetindeki kristal bağlantı önerilerini takip ederseniz sorunsuz çalışıyor. 1 faratlık bie süper kapasitör ile 2000 saat bilgiyi saklayabiliyor...

[mhk]

Tüm açıklamalar için teşekkür ederim. İyi çalışmalar dilerim.

[nonstradam]

arkadaslarında soyledigi gibi pcf8583 güzel. Picbasic pronun I2C komutuyla gayet guzel calısıyor. RTC veya Counter modu var , Yıllara gore alarm kura biliyorsun. tek sorun yılı artık yıl olarak vermesi onuda Program kodu içine basit bir dongu ekleyerek
çözebilirsin.

[cozturk]

Lazım olursa:4'e tam olarak bölünebilen yıllar artık yıldır. Ayrıca bir sayının son iki rakamı dörde bölünebiliyorsa tamamı da bölünür. Örneğin 1916 artık yıldır.

[mhk]

I2c haberleşmisi yapan bu rtc elemanlarının hızı jakkında ne yazabilirsiniz. Örneğin yüksek hızlı bir taramalı sistemde ( 1000 hz gibi ) okuma ve yazma için ne kadar süre gerekli. Sonuçta bunlar seri olarak haberleştikleri için hızda bir düşme olacaktır. Seri eeprom kulanırken yazmak için minimum 2 msn gerekli . 8 Kbyte (8192byte ) yazmak için gerekli süre ,  16384 msn= 16,384 saniye. Uzun bir bekleme süresi. Bu taramalı sistemde bu bekleme çok fazla. Bu rtc yi kullanan arkadaşlar, seri eepromdaki özelliğe mi sahip. Yani okuma ve yazma için min 2 msn mi gerekli? Umarım anlatabilmişimdir. Teşekkürler.

[diot]

dallas   ın ds12887 cipi ne bakın cmos ram ve realtimer dır ve alarm özellipği var.

[mhk]

Sevgili Arkadaşlar. DS1307 yada PCF8583 RTC chiplerininin pic basic pro ile yazılmış örnek programlar varsa yazabilirseniz sevinirim. Ben yeni aldığım için okutup yazamadım. Sorunun parazitten kaynaklandığını sanıyorum. SDA ve SCL uçlarına eğer taktıysanız , taktığınız kondansatörün değeri nedir. Teşekkürler.

[mmengi]

dostum scl ve sda uçlarına bir şey bağlamıyorsun pic in ilgili portuna direk giriyorsun sadece bu portları 10K ile pullup yapıyorsun. aşağıdaki kod biraz uzun ama incelersen çok faydalı olacağına inanıyorum. programda BCD çevrimide var.

'
   '   Project MN1307
   '   ==============
   '   Embedded Software Version 1.00
   '   Target Processor PIC16F628-04/SP
   '   Target PCB - BB-01
   '   Created 12/06/02  
   '   Last Updated 12/06/02
   '   Written by Melanie Newman
   '
   '   DS1307 RTC Program
   '   Includes Setting the Date and Time
   '      3 Buttons Control Setting...
   '      12/24 hour Clock Mode
   '      Year
   '      Month
   '      Day of Month (also accounting for Leap Years)
   '      Hour
   '      Minute
   '      Second
   '
   '   Written for 2 line 16 Character LCD
   '
   '   This program is designed to "hold your hand" and prevent you
   '      from setting any invalid data combinations into the DS1307
   '
   '   It's a crude program, but demonstrates how to set the clock
   '      with control buttons
   '
   '   You will be automatically returned to the Time & Date display if
   '      you are in the Setup and don't touch any Buttons for 20 seconds
   '

   '
   '   Device Programming Options
   '   --------------------------
   @ DEVICE pic16F628, INTRC_OSC_NOCLKOUT
         ' System Clock Options   
   @ DEVICE pic16F628, WDT_ON
         ' Watchdog Timer
   @ DEVICE pic16F628, PWRT_ON
         ' Power-On Timer
   @ DEVICE pic16F628, BOD_ON
         ' Brown-Out Detect
   @ DEVICE pic16F628, MCLR_OFF
         ' Master Clear Options (Internal)
   @ DEVICE pic16F628, LVP_OFF
         ' Low-Voltage Programming
   @ DEVICE pic16F628, CPD_OFF
         ' Data Memory Code Protect
   @ DEVICE pic16F628, PROTECT_OFF
         ' Program Code Protection

   '
   '   Hardware Assignments
   '   --------------------
      '
      '   System LCD
      '   ----------
      '   No Resistors required on any line
      '   RA0-RA3 Data bits DB0-DB3
      '   RA6 RS-bit
      '   RA7 E-Bit
      '
   Define LCD_DREG PORTA   ' Port for LCD Data
   Define LCD_DBIT 0   ' Use lower 4 bits of Port
   Define LCD_RSREG PORTA   ' Port for RegisterSelect (RS) bit
   Define LCD_RSBIT 6   ' Port Pin for RS bit
   Define LCD_EREG PORTA   ' Port for Enable (E) bit
   Define LCD_EBIT 7   ' Port Pin for E bit
   Define LCB_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)
      '
      '   DS1307 Connections
      '   ------------------
      '   10K Resistors required from PORTB.1 and PORTB.2 to Vdd
      '   PORTB.0 relies on weak pull-up's (for future use)
      '
   SQWpin var PORTB.0
      '   You don't actually need to wire this pin... but...
      '   If you're observant, you'll notice I've wired the DS1307's
      '   SQW to RB0.  Rather than 'poll' and display the time/date
      '   as in this example code, you can have an interrupt
      '   on RB0 each second to do this.  In fact if you look at
      '    my code for setting the DS1307 you'll see I've already
      '   programmed it for a 1 second 'Tick' for exactly this
      '   purpose...
   SCLpin var PORTB.1
   SDApin var PORTB.2
      '
      '   Setting Buttons
      '   ---------------
      '   Buttons are connected between PORTB.4, 5 & 6 down to Vss
      '   No Resistors required - we're using weak pull-up's
      '
   DecButton var PORTB.4   ' Press to Decrement Button
   SetButton var PORTB.5   ' Press to Set/memorise Button
   IncButton var PORTB.6   ' Press to Increment Button
      '
      '   Unused Ports
      '   ------------   
      ' RA4
      ' RA5
      ' RB3
      ' RB7

   '
   '   EEPROM Locations
   '   ----------------
   Data @0,74,97,110,70,101,98,77,97,114,65,112,114
      ' Jan Feb Mar Apr
   Data 77,97,121,74,117,110,74,117,108,65,117,103
      ' May Jun Jul Aug
   Data 83,101,112,79,99,116,78,111,118,68,101,99
      ' Sep Oct Nov Dec
   Data 84,117,101,87,101,100,84,104,117,70,114,105
      ' Tue Wed Thu Fri
   Data 83,97,116,83,117,110,77,111,110
      ' Sat Sun Mon

   '
   '   RAM Assignments and Variables
   '   -----------------------------
   CounterA var byte   ' General purpose Variable
   CounterB var byte   ' General purpose Variable
   CounterC var byte   ' General purpose Variable
   CounterD var byte   ' General purpose Variable
   RTCSec var byte      ' Seconds
   RTCMin var byte      ' Minutes
   RTCHour var byte   ' Hours
   RTCWDay var byte   ' Weekday
   RTCDay var byte      ' Day
   RTCMonth var byte   ' Months
   RTCYear var byte   ' Year
   RTCCtrl var byte   ' Control
   SetTime var byte   ' 12/24 Hour Clock
   SetSec var byte      ' Seconds
   SetMin var byte      ' Minutes
   SetHour var byte   ' Hours
   SetDay var byte      ' Day
   SetMonth var byte   ' Months
   SetYear var byte   ' Year
   TimeOut var word   ' Variable for SetUp Menu Time-Out

   '
   '   Program Constants
   '   -----------------
   ButtonRepeat con 200   ' Timeperiod (in mS for Edit Buttons auto-repeat
            ' should you want to hold them down...
   
   '
   '   Start Program
   '   =============
   goto JumpStart

   '
   '   Subroutine Nest Area
   '   ====================

   '
   '   Subroutine Converts back to BCD
   '   -------------------------------
      ' CounterA is the entry variable
      ' CounterB holds the converted BCD result on exit
ConvertBCD:
   CounterB=CounterA DIG 1
   CounterB=CounterB<<4
   CounterB=CounterB+CounterA DIG 0
   Return

   '
   '   Subroutine Displays Month at current Cursor Position
   '   ----------------------------------------------------
      ' CounterB holds Month (1-12) this value is destroyed by the routine
      ' additionally uses CounterA and CounterD variables
DisplayMonth:
   CounterB=CounterB*3-3   ' Convert BCD Month to EEPROM Start Address
DisplaySequence:
   For CounterA=CounterB to CounterB+2
            ' Read and Display Month
      Read CounterA,CounterD
      LCDOut CounterD
      Next CounterA
   Return

   '
   '   Subroutine works out Number of Days in the Month
   '   ------------------------------------------------
      ' SetYear - entry variable containing year (0-99)
      ' SetMonth - entry Variable Containing Month (1-12)
      ' CounterA - exits with number of days
FindDays:
   LookUp SetMonth-1,[31,28,31,30,31,30,31,31,30,31,30,31],CounterA
      ' Above line gives the 'usual' days of the Month
      ' Section below adjusts for Leap-Year
   If SetMonth=2 then
      If (SetYear&$03)=0 then CounterA=29
      endif
   Return
   
   '
   '   Subroutine waits until user reseases Set Button
   '   -----------------------------------------------
SetButtonRelease:
   LCDOut $FE,1
   While SetButton=0:Wend
   Pause 250   ' Small pause to kill any Key-Bounce
   Return

   '
   '   End of Subroutine Nest Area
   '   ---------------------------

   '
   '   Actual Start of Real Program
   '   ============================
JumpStart:
   '
   '   Set Hardware Directions
   '   -----------------------
   CMCON=%00000111      ' Disable Comparators
   TRISA=%00000000      ' PORTA all set to Output
   TRISB=%11111111      ' PORTB all set to Input
   OPTION_REG.7=0      ' Enable Weak Pull-Ups
   '
   '   Reset Hardware
   '   --------------
   Pause 200      ' Timeout for LCD to settle

   '
   '   Time & Date Display Loop
   '   ========================
ReDisplay:
   LCDOut $FE,1      ' Clear LCD
ReDisplayLoop:
      '
      '   Read RTC
      '   --------
   I2CRead SDApin,SCLpin,$D0,$00,[RTCSec,RTCMin,RTCHour,RTCWDay,RTCDay,RTCMonth,RTCYear,RTCCtrl]
      '
      '   Decide if Setup Required/Wanted
      '   -------------------------------
   If RTCSec.7=1 then goto SetUpPreset
            ' Hands-Up who noticed the fact that when the DS1307
            ' powers-up initially from cold, and all it's
            ' registers are potentially "unpredictable", that
            ' Seconds bit 7 is always high?
            ' We can use this feature to automatically jump to
            ' our 'Setup' routine on initial power-up if the user
            ' forgets to keep 'Setup' depressed and so prevent
            ' any 'undesriable' Time & Date displays...
   If SetButton=0 then
            ' If Set Button is pressed, User will be taken to
            ' the Setup Menu.  If the Set Button is pressed at
            ' Power-Up, then the User will be taken to the Setup
            ' Menu directly without any intermediate display
      Gosub SetButtonRelease
      goto Setup
      endif   
   '
   '   Display RTC
   '   -----------
   '   Displayed on 2-line 16 character LCD in the form...
   '      10:15:00 AM
   '      Wed 12 Jun 2002
   '   Note - AM/PM indicator only shows in 12 hour mode.
   '   Additionally there is Hours leading Zero Surpression in 12-Hour Mode
   '      after-all, you don't display 07pm do you?
   '
      '
      '   Display Time on Line 1
      '   ----------------------
   LCDOut $FE,$80
   If RTCHour.6=1 then
         ' Work-Out 12 or 24 hour Display for Hours
      CounterA=(RTCHour>>4)&$01
      else
      CounterA=(RTCHour>>4)&$03
      endif
   CounterA=CounterA*10+(RTCHour&$0F)
   If RTCHour.6=1 then
         ' Display Hours appropriately for 12 or 24 hour Mode
      LCDOut #CounterA
      else
      LCDOut #CounterA Dig 1,#CounterA Dig 0
      endif
   LCDOut ":",#(RTCMin>>4)&$0F,#RTCMin&$0F,":"
   LCDOut #(RTCSec>>4)&$0F,#RTCSec&$0F," "
   IF RTCHour.6=1 then
      If RTCHour.5=1 then
         LCDOut "PM"
         else
         LCDOut "AM"
         endif
      endif
      '
      '   Display Day of Week on Line 2
      '   -----------------------------
         ' Let's face it... the DS1307 doesn't calculate the Day of Week,
         ' all it does is increment a number at each mignight from
         ' 1 thru 7 and roll back to start from 1 all over again.
         ' It's really up to you to work out the DOW and program it in.
         ' This is a tough nut for integer math to do... see the
         ' 'Calculate Day of Week' routine in the setup section.
   LCDOut " ",$FE,$C0
   CounterB=RTCWDay*3+33   ' Convert BCD WeekDay to EEPROM Start Address
   Gosub DisplaySequence   ' Display 3 character sequence from EEPROM
      '
      '   Display Date on Line 2
      '   ----------------------
   LCDOut " ",#(RTCDay>>4)&$0F,#RTCDay&$0F," "
   CounterB=((RTCMonth>>4)&$0F)*10+(RTCMonth&$0F)
   Gosub DisplayMonth
   LCDOut " 20",#(RTCYear>>4)&$0F,#RTCYear&$0F,$FE,$80
   '
   Pause 250      ' Repeat about 4 times/sec
   Goto ReDisplayLoop

   '
   '   Clock and Calandar Settings
   '   ===========================
      '
      '   Initial Default Settings
      '   ------------------------
      ' Default setting preset to the moment this program first born
      '
SetupPreset:
   RTCSec=$00      ' Seconds preset to 00
   RTCMin=$15      ' Minutes preset to 15
   RTCHour=$13      ' Hours preset to 13'00
   RTCWDay=$01      ' Weekday preset to 01
   RTCDay=$12      ' Day preset 12
   RTCMonth=$06      ' Months preset to June
   RTCYear=$02      ' Year preset to 2002
   RTCCtrl=$10      ' Control preset to output 1 second 'Tick' on SQWpin
      '
      '   Convert the Current BCD Data to Something easier to Edit
      '   --------------------------------------------------------
Setup:
   SetTime=RTCHour.6   ' Determines 12/24 Hour mode
   If SetTime=1 then
            ' Regardless of 12/24 options, SetHour always
            ' contains the hours in 24 hour clock format
            ' otherwise there's twice the amount of work
            ' to keep track in the edit routines
      SetHour=(RTCHour>>4)&$01
            ' if 12-hour mode
      else
      SetHour=(RTCHour>>4)&$03
            ' if 24 hour mode
      endif
   SetHour=SetHour*10+(RTCHour&$0F)
   If SetTime=1 then
      If RTCHour.5=1 then
         If SetHour<12 then SetHour=SetHour+12
            ' Add-in the AM/PM indicator
         else
         If SetHour=12 then SetHour=0
         endif
      endif
   SetMin=((RTCMin>>4)&$0F)*10+(RTCMin&$0F)
   SetSec=((RTCSec>>4)&$0F)*10+(RTCSec&$0F)
   SetYear=((RTCYear>>4)&$0F)*10+(RTCYear&$0F)
   SetMonth=((RTCMonth>>4)&$0F)*10+(RTCMonth&$0F)
   SetDay=((RTCDay>>4)&$0F)*10+(RTCDay&$0F)
      '
      '   Setup Menu Loop
      '   ---------------
   CounterC=0      ' Set to Start of Setup (seven steps from 0 to 6)
   TimeOut=0      ' Zero the Time-Out counter
SetupLoop:
   LCDOut $FE,1,"Set "
      '
      '   First Display the Menu Prompts
      '   ------------------------------
      '   This is a crude way of doing the entry Menu's but it was
      '   pretty fast and quite mindless to program this lunch-hour
      '
   If CounterC=0 then
      LCDOut "Mode"
      endif
   If CounterC=1 then
      LCDOut "Hours"
      endif
   If CounterC=2 then
      LCDOut "Minutes"
      endif
   If CounterC=3 then
      LCDOut "Seconds"
      endif
   If CounterC=4 then
      LCDOut "Year : 20"
      endif
   If CounterC=5 then
      LCDOut "Month"
      endif
   If CounterC=6 then
      LCDOut "Day"
      endif
   If CounterC<>4 then LCDOut " :"
      '
      '   Now Display the Data
      '   --------------------
SetupDisplayLoop:
         '
         '    12/24 Hour Option
         '   -----------------
   If CounterC=0 then
      LCDOut $FE,$8B
      If SetTime=0 then
         LCDOut "24HR"
         else
         LCDOut "12HR"
         endif
      LCDOut $FE,$8B
      endif
         '   Hours
         '   -----
         '   Hours are tricky because of the 12/24 & AM/PM bit
         '   so we have to reconvert 1-24 back to 1-12 plus AM/PM
   If CounterC=1 then
      CounterA=SetHour
      If SetTime=1 then
         LCDOut $FE,$8E
            ' Display AM/PM bit
         If CounterA<12 then
            LCDOut "AM"
            else
            LCDOut "PM"
            endif
         If CounterA=0 then CounterA=12
         If CounterA>12 then CounterA=CounterA-12
         endif
      LCDOut $FE,$8C,#CounterA
      If CounterA<10 then LCDOut " "         
      LCDOut $FE,$8C
      endif
         '
         '   Minutes
         '   -------
   If CounterC=2 then
      LCDOut $FE,$8E,#SetMin
      If SetMin<10 then LCDOut " "
      LCDOut $FE,$8E
      endif
         '
         '   Seconds
         '   -------
   If CounterC=3 then
      LCDOut $FE,$8E,#SetSec
      If SetSec<10 then LCDOut " "
      LCDOut $FE,$8E
      endif
         '
         '   Year
         '   ----
   If CounterC=4 then
      LCDOut $FE,$8D,#SetYear DIG 1,#SetYear Dig 0
      LCDOut $FE,$8D
      endif
         '
         '   Month
         '   -----
         '   Here's a nice touch to setting the month rather
         '   than the usual number entry method...
         '
   If CounterC=5 then
      LCDOut $FE,$8C
      CounterB=SetMonth
      Gosub DisplayMonth
      LCDOut $FE,$8C
      endif
         '
         '   Day
         '   ---
   If CounterC=6 then
      LCDOut $FE,$8A,#SetDay
      If SetDay<10 then LCDOut " "
      LCDOut $FE,$8A
      endif
      '
      '   The Data-Entry Bit
      '   ------------------
SetupEntryLoop:
         '
         '   Decrement Button Pressed
         '   ------------------------
   If DecButton=0 then
            '
            '   12/24 Clock Selection
            '   ---------------------
      If CounterC=0 then
         If SetTime=0 then
            SetTime=1
            else
            SetTime=0
            endif
         endif
            '
            '   Decrement Hours
            '   ---------------
      If CounterC=1 then
         If SetHour=0 then
            SetHour=23
            else
            SetHour=SetHour-1
            endif
         endif
            '
            '   Decrement Minutes
            '   -----------------
      If CounterC=2 then
         If SetMin=0 then
            SetMin=59
            else
            SetMin=SetMin-1
            endif
         endif
            '
            '   Decrement Seconds
            '   -----------------
            '   Kinda overkill to include setting seconds,
            '   but if you got codespace to burn...
      If CounterC=3 then
         If SetSec=0 then
            SetSec=59
            else
            SetSec=SetSec-1
            endif
         endif
            '
            '   Decrement Years
            '   ---------------
      If CounterC=4 then
         If SetYear=0 then
            SetYear=99
            else
            SetYear=SetYear-1
            endif
         endif
            '
            '   Decrement Month
            '   ---------------
      If CounterC=5 then
         If SetMonth=1 then
            SetMonth=12
            else
            SetMonth=SetMonth-1
            endif
               '
               ' Changing the Month has a bearing on the
               ' days, especially if you've got days preset
               ' to 31 and you now select a month with fewer
               ' days... so this bit here just prevents that
         Gosub FindDays
         If SetDay>CounterA then SetDay=CounterA
         endif
            '
            '   Decrement Days
            '   --------------
            '   Tricky one here... go work-out the days
            '   of the month first...
      If CounterC=6 then
         Gosub FindDays
         If SetDay=1 then
            SetDay=CounterA
            else
            SetDay=SetDay-1
            endif
         endif
      Pause ButtonRepeat
      TimeOut=0
      Goto SetUpDisplayLoop
      endif
         '
         '   Increment Button Pressed
         '   ------------------------
         '    This is just like Decrement but opposite...
   If IncButton=0 then
            '
            '   12/24 Clock Selection
            '   ---------------------
      If CounterC=0 then
         If SetTime=1 then
            SetTime=0
            else
            SetTime=1
            endif
         endif
            '
            '   Increment Hours
            '   ---------------
      If CounterC=1 then
         If SetHour=23 then
            SetHour=0
            else
            SetHour=SetHour+1
            endif
         endif
            '
            '   Increment Minutes
            '   -----------------
      If CounterC=2 then
         If SetMin=59 then
            SetMin=0
            else
            SetMin=SetMin+1
            endif
         endif
            '
            '   Increment Seconds
            '   -----------------
            '   Kinda overkill to include setting seconds,
            '   but if you got codespace to burn...
      If CounterC=3 then
         If SetSec=59 then
            SetSec=0
            else
            SetSec=SetSec+1
            endif
         endif
            '
            '   Increment Years
            '   ---------------
      If CounterC=4 then
         If SetYear=99 then
            SetYear=0
            else
            SetYear=SetYear+1
            endif
         endif
            '
            '   Increment Month
            '   ---------------
      If CounterC=5 then
         If SetMonth=12 then
            SetMonth=1
            else
            SetMonth=SetMonth+1
            endif
               '
               ' Changing the Month has a bearing on the
               ' days, especially if you've got days preset
               ' to 31 and you now select a month with fewer
               ' days... so this bit here just prevents that
         Gosub FindDays
         If SetDay>CounterA then SetDay=CounterA
         endif
            '
            '   Increment Days
            '   --------------
            '   Tricky one here... go work-out the days
            '   of the month first...
      If CounterC=6 then
         Gosub FindDays
         If SetDay=>CounterA then
            SetDay=1
            else
            SetDay=SetDay+1
            endif
         endif
      Pause ButtonRepeat
      TimeOut=0
      Goto SetupDisplayLoop
      endif
         '
         '   Set Button Pressed
         '   ------------------
   If SetButton=0 then
      CounterC=CounterC+1
            ' Increment Menu Item
      TimeOut=0
      If CounterC>6 then
            ' Save Data if all edit items exhaused
         LCDOut $FE,1,"Memorised"
            ' Make the User feel happy
            '
            '   Save 12/24 Hours to BCD DS1307's Format
            '   ---------------------------------------
         CounterA=SetHour
         If SetTime=1 then
            If CounterA>12 then CounterA=CounterA-12
            If CounterA=0 then CounterA=12
            endif
         Gosub ConvertBCD
         RTCHour=CounterB
               ' Save the Hours Value
         If SetTime=1 then
            RTCHour.6=1
               ' Save the 12 Hour Mode Flag
            If SetHour=>12 then RTCHour.5=1
               ' Save the 'PM' Flag
            endif
            '
            '   Save Minutes
            '   ------------
         CounterA=SetMin
         Gosub ConvertBCD
         RTCMin=CounterB
            '
            '   Save Seconds
            '   ------------
         CounterA=SetSec
         Gosub ConvertBCD
         RTCSec=CounterB
            '
            '   Save Year
            '   ---------
         CounterA=SetYear
         Gosub ConvertBCD
         RTCYear=CounterB
            '
            '   Save Month
            '   ----------
         CounterA=SetMonth
         Gosub ConvertBCD
         RTCMonth=CounterB
            '
            '   Save Day
            '   --------
         CounterA=SetDay
         Gosub ConvertBCD
         RTCDay=CounterB
            '
            '   Calculate Day of Week & Save
            '   ----------------------------
               ' Melanie's fudge for calculating Days of Week
               ' using PBP's integer math...
               ' by the time someone's clock displays the
               ' the wrong Day of Week, I'll hopefully have long
               ' retired and be past caring...
               ' I wouldn't however go stick this routine in a
               ' Nuclear Power Station to purge the reactor
               ' every Monday morning without checking how far it
               ' will work before the integer math overflows...
               ' In my routine RTCWDay=1 is a Tuesday (the
               ' start of my week) and continues sequentially
               ' until RTCWDay=7 which is a Monday
         CounterA=SetYear+4
         CounterB=SetMonth
         If SetMonth<3 then
            CounterA=CounterA-1
            CounterB=CounterB+12
            endif
         CounterD=(SetDay+(153*CounterB-457)/5+365*CounterA+CounterA/4-CounterA/100+CounterA/400+2) MOD 7
         RTCWDay=CounterD+1
            '
            '   Do the Business
            '   ---------------

         I2CWrite SDApin,SCLpin,$D0,$00,[RTCSec,RTCMin,RTCHour,RTCWDay,RTCDay,RTCMonth,RTCYear,RTCCtrl]
         Pause 1000
         Gosub SetButtonRelease
         Goto ReDisplay
         endif
      Gosub SetButtonRelease
      Goto SetupLoop   ' Loop for Next Menu Item
      endif
      '
      '   Menu TimeOut Counter
      '   --------------------
   Pause 1         ' Kill 1mS
   TimeOut=TimeOut+1
   If TimeOut>20000 then goto ReDisplay
            ' User paused too long
            ' Return User to Time & Date Display
            ' This will however bounce the User to the original
            ' Setup Menu start point if the DS1307 has not
            ' been initialised
   Goto SetupEntryLoop   ' Loop for Button Press

   '
   End

[mmengi]

başka bir örnek daha

;-----------------------Copyright 2002, High-TechGarage.com-----------------------
;
;  This program will interface with the DS1307, I2C Real-Time Clock from
;  Dallas Semiconductor. P0 is used as SDA (serial data) and P1 is used as
;  SCL (serial clock). This ATOM  software is part of a tutorial available
;  on our website: http://www.high-techgarage.com/tutorial/ds1307.php
;
;  The RTC will set if memory location 0 on the ATOM is set to 0. To set
;  the clock run a program which sets EEPROM location 0 to 0. The program is
;  only 1 line: write 0,0. Finally change the time and date below and run this
;  program.
;
;  Revision: 1.0
;  Date: 03/22/02
;
;-----------------------------------DS1307.bas------------------------------------

clear               ; clear all variables

SDA      con      P0      ; 2-wire serial data
SCL      con      P1      ; 2-wire serial clock

; --{ I2C Definitions }-----------------------------------------------------------

RTC         con      %11010000   ; RTC device address (byte addressing)

; --{ RTC 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)
ContReg      con      $07         ; control register
RTCflag      con      0         ; RTC flag (location 0 of BS2 EEPROM)
RTCset      var      bit         ; bit to check if RTC has been set

; The constants below set the RTC to: 12:35:00 on Friday, March 22nd, 2002

_sec      con      $00         ; set seconds to 00 (enables the oscillator)
_min      con      $35         ; set minutes to 35
_hr         con      $12         ; set hour to 12 (noon)
_day      con      $06         ; set day to 6 (Friday)
_date      con      $22         ; set date to 22 (22nd)
_mon      con      $03         ; set month to 3 (March)
_yr         con      $02         ; set year to 2002

; The control register is used to control the operation of the SQW/OUT pin
; Starting with the MSB (Bit 7) -> OUT  x  x  SQWE  x  x  RS1  RS0 <- (Bit 0)
; OUT: if SQWE=0, the logic level on SQW/OUT pin is 1 if OUT=1 and is 0 if OUT=0.
; SQWE: square wave enable. 1->enabled 0->disabled
; RS1, RS0: rate select. 00->1Hz, 01->4.096kHz, 10->8.192kHz, 11->32.768kHz

cntrl      con      %00010000   ; sets the SQW/OUT to 1Hz pulse, logic level low

; --{ General Variables }---------------------------------------------------------

sec         var      byte      ; seconds
min         var      byte      ; minutes
hr         var      byte      ; hours
day         var      byte      ; day
date      var      byte      ; date
mon         var      byte      ; month
yr         var      byte      ; year

; --{ Check to see if clock is set }----------------------------------------------

pause 100                     ; let everything settle down
write 0, 0

read RTCflag, RTCset            ; check to see if the clock has already been set
if RTCset = 0 then SetTimeAndDate   ; if it is 0, we need to set the clock


;===[ MAIN PROGRAM STARTS HERE ]==================================================

;  The main program is just a loop which gets the current time, then displays it
;  on the debug screen.

Loop:                  ; Loop to display the time
i2cin SDA, SCL, RTC, SecReg, [sec,min,hr,day,date,mon,yr]
debug ["Current Time:", 13]
debug ["-------------------", 13]
debug [hex hr, ":", hex min, ":", hex sec, 13]
pause 1000
goto Loop

end

;===[ MAIN PROGRAM ENDS HERE ]=====================================================


;--{ Set time and date on RTC subroutine }-----------------------------------------

SetTimeAndDate:
i2cout SDA, SCL, RTC, SecReg, [_sec,_min,_hr,_day,_date,_mon,_yr,cntrl]
pause 10
write RTCflag, 1            ; set the flag so we don't reset the clock
goto Loop

[mmengi]

ds 1302 için örnek

' LCD clock program using Dallas1202/1302 RTC

' Define LOADER_USED to allow use of the boot loader.
' This will not affect normal program operation.
Define   LOADER_USED   1

       Include "MODEDEFS.BAS"  ' Include Shiftin/out modes

Define  LCD_DREG        PORTD   ' Define LCD connections
Define  LCD_DBIT        4
Define  LCD_RSREG       PORTE
Define  LCD_RSBIT       0
Define  LCD_EREG        PORTE
Define  LCD_EBIT        1

' Alias pins
RST     var     PORTA.2
IO      var     PORTC.1
SCLK    var     PORTC.3

' Allocate variables
rtcyear var     byte
rtcday  var     byte
rtcmonth var    byte
rtcdate var     byte
rtchr   var     byte
rtcmin  var     byte
rtcsec  var     byte
rtccontrol var  byte


       Low RST         ' Reset RTC
       Low SCLK

       ADCON1 = 7      ' PORTA and E digital
       Low PORTE.2     ' LCD R/W low = write
       Pause 100       ' Wait for LCD to startup

       ' Set initial time to 8:00:00AM 07/16/99
       rtcyear = $99
       rtcday = $06
       rtcmonth = $07
       rtcdate = $16
       rtchr = $08
       rtcmin = 0
       rtcsec = 0
       Gosub settime   ' Set the time

       Goto mainloop   ' Skip subroutines


' Subroutine to write time to RTC
settime:
       RST = 1         ' Ready for transfer

       ' Enable write
       Shiftout IO, SCLK, LSBFIRST, [$8e, 0]

       RST = 0         ' Reset RTC

       RST = 1         ' Ready for transfer

       ' Write all 8 RTC registers in burst mode
       Shiftout IO, SCLK, LSBFIRST, [$be, rtcsec, rtcmin, rtchr, rtcdate, rtcmonth, rtcday, rtcyear, 0]

       RST = 0         ' Reset RTC
       Return

' Subroutine to read time from RTC
gettime:
       RST = 1         ' Ready for transfer

       Shiftout IO, SCLK, LSBFIRST, [$bf]      ' Read all 8 RTC registers in burst mode
       Shiftin IO, SCLK, LSBPRE, [rtcsec, rtcmin, rtchr, rtcdate, rtcmonth, rtcday, rtcyear, rtccontrol]

       RST = 0         ' Reset RTC
       Return

' Main program loop - in this case, it only updates the LCD with the time
mainloop:
       Gosub gettime   ' Read the time from the RTC

       ' Display time on LCD
       Lcdout $fe, 1, hex2 rtcmonth, "/", hex2 rtcdate, "/" , hex2 rtcyear,_
       "  ", hex2 rtchr, ":", hex2 rtcmin, ":", hex2 rtcsec

       Pause 300       ' Do it about 3 times a second

       Goto mainloop   ' Do it forever

       End

[mmengi]

ÇOK YER KAPLADIM AMA BİR ÖRNEK DAHA DS1302 İÇİN

' LCD clock program using Dallas1202/1302 RTC

Include "MODEDEFS.BAS" ' Include Shiftin/out modes

Define LCD_DREG PORTD ' Define LCD connections
Define LCD_DBIT 4
Define LCD_RSREG PORTE
Define LCD_RSBIT 0
Define LCD_EREG PORTE
Define LCD_EBIT 1

' Alias pins
RST var PORTA.2
IO var PORTC.1
SCLK var PORTC.3

' Allocate variables
rtcyear var byte
rtcday var byte
rtcmonth var byte
rtcdate var byte
rtchr var byte
rtcmin var byte
rtcsec var byte
rtccontrol var byte


Low RST ' Reset RTC
Low SCLK

ADCON1 = 7 ' PORTA and E digital
Low PORTE.2 ' LCD R/W low = write
Pause 100 ' Wait for LCD to startup

' Set initial time to 8:00:00AM 07/16/99
rtcyear = $99
rtcday = $06
rtcmonth = $07
rtcdate = $16
rtchr = $08
rtcmin = 0
rtcsec = 0
Gosub settime ' Set the time

Goto mainloop ' Skip subroutines


' Subroutine to write time to RTC
settime:
RST = 1 ' Ready for transfer

' Enable write
Shiftout IO, SCLK, LSBFIRST, [$8e, 0]

RST = 0 ' Reset RTC

RST = 1 ' Ready for transfer

' Write all 8 RTC registers in burst mode
Shiftout IO, SCLK, LSBFIRST, [$be, rtcsec, rtcmin, rtchr, rtcdate,
rtcmonth, rtcday, rtcyear, 0]

RST = 0 ' Reset RTC
Return

' Subroutine to read time from RTC
gettime:
RST = 1 ' Ready for transfer

Shiftout IO, SCLK, LSBFIRST, [$bf] ' Read all 8 RTC registers
in burst mode
Shiftin IO, SCLK, LSBPRE, [rtcsec, rtcmin, rtchr, rtcdate, rtcmonth,
rtcday, rtcyear, rtccontrol]

RST = 0 ' Reset RTC
Return

' Main program loop - in this case, it only updates the LCD with the time
mainloop:
Gosub gettime ' Read the time from the RTC

' Display time on LCD
Lcdout $fe, 1, hex2 rtcmonth, "/", hex2 rtcdate, "/" , hex2
rtcyear,_
" ", hex2 rtchr, ":", hex2 rtcmin, ":", hex2 rtcsec

Pause 300 ' Do it about 3 times a second

Goto mainloop ' Do it forever

End

[mhk]

Dostum mmengi ilgin için gerçekten teşekkür ederim. Lakin verdiğin örnekler bende var. Kendimde kod geliştirdim lakin olmadı. Yani olmamasının nedenini biliyorum. Parazit... Çünkü başka bir devrede eepromu okuttuğum halde bu devrede eepromu bile okutamadım. Kaldıki RTC yi okutayım. Bunun için SDA ve SCL uçlarına paralel kondansatör girmeyi denedim lakin olmadı. Bunu şunun için yazıyorum, böyle parazitlerden çok kolay etkileniyorsa işimiz var. Belkide GND yi iyi yapamadığımızdan kaynaklanıyordur. Ayrıca I2c haberleşmesi yapan sistemleri mümkün mertebe bağlanacak uçlara yakın yapmak gerekiyor. Yinede ilgelendiğin için teşekkür ederim. İyi çalışmalar.