Page 58 - Making PIC Microcontroller Instruments and Controllers

THE OUTPUT AND NEADING
COI{TSOLLIIIG THE IIIPUT

The oulput is what we are iooking for in any insllument lt is the final result of all the work
we do. We will interactwith all of the output deviccs on the LAB-XI in these progrums.

BASIC PROGRAMS
t write a program to conlrol one LED on the bargraph
, Control all eight LEDS in the bdrgraph consecutively
t Dim and brighten one LED (creating pulses of various length9
'Hello
! Wite world" to the LCD on its lwo lines
t Wrirc binafy and decimal valucs to the LCD.
! Output a sinple tonc on the speaker
! Outpur a telephone |one signal on the speaker

ADVANCED PROGBAM
! Move an WC sc o baok and lbfth

Programs That Read the InPuts

and Then Provide Output

l. Write a simple program to read the lirst colunrn, Iirst row bulton' and tum ON one
LED while the button is down.
2. Rcad the enlirc keyborrd and display thc binaiy value ofthe row and column read
on the LCD.
3. Read the kelboatd and display decimal key number on the LCD
4. Read one potentiometer and display its S_bil value on thc LCD in binaty, hex, and
decimal notation. Also display the binary value on the bargraph
5. Read all three potentiometers and display their values on the LCD-
6. Advancedr Use the tfuee potentiomcters to control an R/C scrvo Conrol the loca
tion of the center position, the limit position of the end positions, and the rale of move-
mcnl. Use thrcc switches on the keyboard to move thc servo clockwise' center the
servo, and movc i! conDterclockwise.

Outputs
Creating

k willbc easier if wc learn to conlrol the outputs first because we can do this wilh pto_
grams that we write without lhe need for any additional hardware or input signal we
will stdrt with the simple control ofLEDS. proceed to the control of the two line LCD,