real-time clock - s100

Use one of the 8051's timers to give you an event every second (or whatever) - then it's just a matter of counting the events, and remembering 60 seconds in a minute, 60 minutes in an hour, etc, etc,...

yes, i know that is what i would have 2 do

just not sure how exactly to configure the timer so i get an interrupt every second

if somebody could maybe help me there?

Hi

Take a look Here.
http://www.esacademy.com/faq/calc/

/Ingo

And here

http://www.codearchitect.org/

Thanks for the help so far.

But can somebody please give me an example of a timer configured to interrupt either once every second or at a specific interval, so I can calculate from that seconds, mins etcetera.

using the s100 board, it osc is 14.7456 & using a 8051f023 chip.

all you need is in "the bible"

here are the links to "the bible"
Chapter 1
http://www.semiconductors.philips.com/acrobat/various/80C51_FAM_ARCH_1.pdf

chapter 2
http://www.semiconductors.philips.com/acrobat/various/80C51_FAM_PROG_GUIDE_1.pdf


chapter 3
http://www.semiconductors.philips.com/acrobat/various/80C51_FAM_HARDWARE_1.pdf

Erik

There are examples in the C51 downloads area:
http://www.keil.com/download/list/c51.htm

i have those examples

actually trying to configure the timer0 example, but i just do not know how to set the interrupts to occur for example every 10ms, which would enable me to know that if the interrupt occurs 100 times, i have a second.

i have lots of examples, and i know how to make the timer go into an interrupt, i just do not know how to configure that interrupt to occur at intervals i want it to

i just do not know how to configure that interrupt to occur at intervals i want it to
If you had read "the bible" you would.

Erik

The operation of the timers is described on pp6-8 in Chapter 3 of "the bible", cited earlier.

You may also want to look at the 8051 & 8052 tutorials at http://www.8052.com/tutorial.phtml