Timer1 with external Crystal on PIC16F88

[xorcise]

pic 16f88 xtal

I posted 4 precision RTC methods using the PIC's external oscillator. 2 of them use Timer1. They are as accurate as any other RTC, and since they are interrupt based you can use them for other typical non-interrupt based microcontroller functions.

While the code is written in mikroBasic, the registers are very transparent in the code and easily understood to be made into assembly. The Timer1/CCP example is my recommendation. Once the registers are set up it's no problem to keep accurate time.

And what's happening to electronics these days.... does anyone actually build a real circuit anymore?

 

[blueroomelectronics]

problema osccon icd

yes i did try, i tried it in MPLAB SIM and in PROTEUS. so it doesnt work neither there nor here. and one more question, can i use 20MHz crystal on RB6,7 then? or i must use ONLY 32.768Khz? and do i have to connect another crystal to OSI inputs? or only ONE crystal on RB6 and RB7? thanks

ONLY 32.768KHz crystal on RB6 & 7 some of the older TIMER1 osc worked with upto 200KHz but never anything over that.

Just the 32KHz is all you need on RB6 & 7. If you want to use 20MHz it hooks up to RA6 & 7

Again take a look at the Dragonfly kit documentation on my site, it should answer most of your questions about using a 32KHz watch crystal on a PIC and using the CCP1 special event interrupt which is very easy to program for a 1 second interrupt with a 32KHz crystal on TIMER1

Added after 2 minutes:

And what's happening to electronics these days.... does anyone actually build a real circuit anymore?

Good question, EDA board is more of a looking for a handout, or do my homework for me kinda place.

 

[BlackOps]

crystals in pic16f88

And what's happening to electronics these days.... does anyone actually build a real circuit anymore?

i think u should look for it at the Hobby Circuits and small project topic on the edaboard forum...

 

[xorcise]

timer1 problem in 16f886

I have Proteus too, but I build and test in the real world mostly. Do companies actually hire you virtual electronics guys? I know I wouldn't hire someone who didn't sport some solder burns on his fingers, or burn holes in the lap of his pants...