Page 91 - Making PIC Microcontroller Instruments and Controllers

Go to beginring of line 1
Go to beginning ofline 2

Go to a specific position on line I
Go to a specific position on line 2
Show the cursor
Hide the cursor

Use an underline cu$or
Tum on cursor blink

Move cursor.ight one posjtion
Move cursor left one position

Therc are still other commands to discover in the datasheet, There are memory loca
tions within the LCD, as well as invisible locations beyond the end of the visjble 2b char_
actels. You should know how to find all this information.
It is also possible to design your own font for use with this parficular display. All the
information needed to do so can be found in the Hitachi t{D447g0U manuayd;sheet.

l. Wdte a program to put the 26letters of the alphabet and the ten numerals in the 40
spaces that are available on the display. put
four spaces between the numbers and
the alphabet to filt in the four remaining spaces. Once all the characters have been
entered, scroll the 40 characters back and forth endlessly though the two lines of the
display.
2. Write a progmm to bubble the 26 capital letters of the alphabet tbrcugh the numbers
.,A,i
0 to 9 on line two of the LCD. (This means: First put the numbers oi line two.
',0,'
then talces the piace of the and all the numbers move over. Then the ,A,, takes
-A..rcphcei
lheplaceofthr"l"andthe 0 moves to po\ilion L Aierward. the lhe
q ..8..
r ano so on Utt rt gets pa\l lhe Follou ing rhr(. lhe
sran\ irs wa) acrosc trhe
numbers and so on.) Loop forcver.
3. Write a prognm to write the numbers 0 to 9 upside down on line l. Wait 1 second
and then llip ihe numbers righr side up. Loop.
..HELLO
4. Create a program to write
WORLD,, to the alisplay and then change it to low
ercase one tener at a time with 100 milliseconds between letters. Wait I second and
go back to uppercase one chamcter at a time with negative letters (all dors on the dis_
play are revened to show a da* background with white letters in lowercase). Loop.

MISCELLAI{EOUS EXERCISES

These exercises ate designed to challenge your programming ability. Again, you will
need access to ihe datasheet lbr the LC Display.