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hi does anyone know if it is at all possible to make a 16f877a do more than one operation at a time? ie, flash led on one port whilst looking for an input on another port and outputting to an lcd screen at the same time?
any help would be greatfull, thanks
You will want to look at interrupts.
Or build your own time slicing system... :eek: not hard, but a bit time wasting :D
Interrupt all the way!
Timer interrupt is one of my favorite.
Or simply a loop that does those three operations one after the other... since they happen so fast, to the user they will look simultaneous.
Bit time wasting...hahaha, I'm also a newby to PBP (used assembly untill now), but I think the OP need to learn a bit more about basic PIC operation, and try some of the sample programs to see how things happen in "real life".Quote:
Originally Posted by mister_e
I (and many/{all} of us) had exactly that question.
Happily, interrupts were made for that, reacting at specific realtime events, such as: -A/D activity, USART I/O, QEI, Timers, Capture, Keyboard, switch, and so on.-
There are 2 ways to handle interrupts:
1.- The standard way is using 'ON INTERRUPT' statement & stuff. (see manual/forum)
2.- The recommended way is using Darrel Taylor's 'Instant Interrupts', once you understand it, you'll enjoy it's benefits. (documentation in a thread in the forum).
My personal choice is labeling tasks to optimize troubleshooting (if happen), code and memory. (why labeling? because PBP doesn't allow functions or sub/procedures structure)
Rodrigo.
I forgot to specify... Interrupts don't need to be handled within a loop, they just 'pop-up' in realtime things happen.Quote:
Originally Posted by RodSTAR
For Multiple work, you can make Multiple interrupt (pin) on port c or d or b then ON INTERRUPT, you can do as you wish.
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