PIC16F84A problem

[imranshoukat]

Hi Guys,

I am using a 5x7 display kit from Talking electronics. I received it few days back and soldered the components onto the PCB, had some problems with the Serial cable, anyways now the main problem which i am not able to figure out is, when I burn the PIC with a program, it executes the program for just
2-3secs and it seems that it resets itself. What could go wrong, the solder, the PIC or what.

 

[Pommie]

It sounds like you have the Watch Dog Timer enabled. What code are you programming into the chip?

Mike.

 

[imranshoukat]

Well I type any code, the program runs well, but it resets itself after 2-3 secs. How do I know whether the watch dog timer is active or not.

 

[Pommie]

The WDT is enabled in the configuration setting. You should have a line in your code that starts __config or you can normally setup the config in your programming software. You can test if the WDT is enabled by inserting a CLRWDT (Clear Watch Dog Timer) instruction in your code - it should be in a loop so it gets cleared often.

Mike.

 

[imranshoukat]

thanks.....it worked..the WDT option was checked in, I checked it out while programming and it worked...wowowow...thanks

 

[Pommie]

Glad to here it's working. Have fun.

Mike.