Page 190 - Making PIC Microcontroller Instruments and Controllers

ta6 tHE uillvERsA! lNslRuiilEl{t A BAoKGROUNO DISCUSSIOI{

ea ier is an extension ofthe themomeier we will coDstruct
The controllermentioned
in one of the pro.jects. lts construction is covercd in detail

Notes

All instruments arc assembled fiom slanda-rd hardware and soltware components' so lhey
tend to have a modular structure. Each nodule in the instrument provides one function
Thefbllowing arc some commonmodules you would find on systens bascd on the PIC
l6F877A:

I Analog input section
t Mathemalical maDipulalions
r Set the DEFINES for rhe LCD
I Display to the LCD
I Read a potentrometer or two
I Display to displays (CRT)
I Read a keyboard
I Put out a tone
I Read a s{'itch
! A communications
module
by sclecting ordesigning the modules we need aDdassem-
We create our instr-Lrments
bling them into a project- Once you have created a nodulc or subroutrne, you can use
it again and again in your designs if you oreale it to be easily transportable to olher
designs. Taking the time to clo so now will savc you a lol oI time' agrin and again. in

Notice in the projecls that follow that I too use lhe modules over and over agaiD'
I also macle a concerted ellbrt to use as fcw instruclions in PIC Basic Pro (PBP) as
possible, so the emphasis was on the design of ihe insfuments, not on fancy soft-
ware lricks and routines.