[PIC] Spurious SCl transition detected in proteus: RTC DS1307 and PIC 18F4520

[jayanth.devarayanadurga]

Remove this line

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Code C - [expand]
1
while(1);

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which is at the end of code.

 

[Nagesh29]

Already checked with this..
In that case, my Proteus simulation is continuously running and hangs after some time.

 

[jayanth.devarayanadurga]

Generate cof file and use it for Proteus and debug. If you want to display time then you should read atleast once every while(1) loop. I don't know whether DS1307 Proteus model has inbuilt 32.768 KHz clock or not. Your crystal used for RTC is set to 1MHz.

 

[Nagesh29]

The same problem persists..
rtc resets after every 2 seconds.

 

[jayanth.devarayanadurga]

Resetting or hanging? In Proteus? Disable WDT in code/IDE and also in Proteus.

 

[Nagesh29]

Resetting if last while(1); loop is present.
Hanging if that loop is removed.

Also, I disabled the WDT in code.
In that case my timer interval window works perfectly fine in Proteus. But I2C debugger window is not showing any data.
How should I disable WDT in proteus?

 

[jayanth.devarayanadurga]

DS1307 clock window has nothing to do with your code. It runs on its own and gets time from PC clock. There is a check box to syncronize RTC time with PC. Uncheck it and see.

Zip and post latest code (all files of the project). I just can't create a new project!

 

[Nagesh29]

Thank you Jayant for your co-operation.
PFA for complete solution.

 

[jayanth.devarayanadurga]

Maybe it is a bug of Proteus.

 

[Nagesh29]

@Jayant:

Hex file from my micro c project works perfectly in the same Proteus simulation.

 

[Venkadesh_M]

Hi Nagesh29,
what is your problem??
did you tried WDT turning off??

 

[Nagesh29]

Yes Jayant..
But I2C debugger is not showing any data in proteus.
It is not working on hardware too.

 

[jayanth.devarayanadurga]

Maybe you need to set registers related to oscillator properly in PIC18F devices. In mikroC it does all those things but in C18 you have to set it.


Code fixed. Try to print rtc values to usart. Better use 10 MHz so that spbrg value for uart can be used from datasheet.


Edit: Your Time transformation routine is wrong for DD:MM:YY

 

[Nagesh29]

Thanx buddy..
Thank you very much..
It works perfectly fine.

 

[jayanth.devarayanadurga]

Updated version.

 

[Nagesh29]

@Jayant
Sorry to disturb you again buddy..
Your MPLAB project works perfect but when I try to open your project in my mplab IDE it is not working.
So, I converted your project as per my MPLAB IDE version compatibility.
But IdleI2C(); function is not working there it shows error..

Thanx in advance.

 

[jayanth.devarayanadurga]

Mine is MPLAB 8.92 and C18 3.46. What version is yours? I will install your version and test. Show screenshot of error message.

 

[Nagesh29]

MPLAB version is 8.30 and C18 3.12.
Screenshot of the error msg is attached below.
https://obrazki.elektroda.pl/5819793800_1382424574.png

Thank you.