Interface of DS1307 with PIC16F876A

[Melanie]

Like ONE HOUR has elapsed since your initial post and you're bugging people for an answer... on a SUNDAY when almost all the professionals are home lazing by the pool and very few folks are actually looking at the forum.

	I2CAddress var Byte
	RTCRegister var Byte
	RegisterContents var Byte

	I2CAddress=$D0
	I2CRead SDA,SCL,I2CAddress,RTCRegister,[RegisterContents],I2CError

Look in the PBP manual to see what I've written. Look in the RTC's Datasheet to discover what the Registers are and what they contain. Go to the MELabs website, download and study an RTC example that's posted there...

[Eng4444]

You cannot understand what people have... please don't think that i am just sitting here waiting to study that stuff. I am a biomedical Engineer - from where my nickname- and i will graduate in 2 weeks.

the last time i asked a help about "div32", i felt i was treated in a bad way.

i want you to understand that working with PIC is not my specialization at all; not with PicBasic Pro, nor with DS1307.

i just design medical instruments and machines and train doctors to use them.

But it just happened that in my senior project, i am adding an extra part and using PIC. Then, i will never see PIC in my whole life.

So in case you are able to help me, do it completely please; even if you ask for money.

But i need a whole program... between DS1307 and PIC16F876A.

By the way, can i use a program written in C and write it in the PicBasic Pro program? because i just found an interface written in C language.

[Eng4444]

i think you didn't understand me well because you provided me a program to read from DS1307 and i am thankful.

But still, i dunno how to prgram it ( i mean how to set hours, minutes, seconds, month, day ,year for the first time).

So as i said, i just bought a DS1307 and i have a PIC16F876A. what are the next steps?....


I'll appear an idiot i know but really... this is not my field at all.. i got stuck with it and not way to step back because of lack of time...

thank you all for your understanding.

[Eng4444]

Would you be able to help me?

[Charles Linquis]

The following may prove useful.

Remember that the DS1307 stores all data in BCD format, so you will have
to convert your ASCII input into binary BCD before writing, and will have to
convert back from BCD when reading.


ClockAddr CON %11010000 ' RTC device address (byte addressing)
Offset CON 0
Cntrl CON %00010000 ' sets the SQW/OUT to 1Hz pulse, logic level low

I2CRead SDA_PIN, SCL_PIN,ClockAddr,Offset,[sec,mins,hr,day,date,mon,yr],ErrorTrap


I2CWrite SDA_PIN,SCL_PIN,ClockAddr,Offset,[sec,mins,hr,day,date,mon,yr,cntrl],ErrorTrap

[Travin77]

If you can buy a ds1302 RTC I can provide you with a working program and a schematic. I know it isn't a 1307, but those are the options I can provide.

Travin

[Eng4444]

If you can buy a ds1302 RTC I can provide you with a working program and a schematic. I know it isn't a 1307, but those are the options I can provide.

Travin

++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++

I do not care about the IC, i can buy DS1302 as long as it gives the same result.
i just need to deal with time in a certain way (multiply, divide...etc) so the IC will not cause a prob at all... do you have a program for PIC16F876A? i'll be more than thankful!!!