Larry's Blog

I have developed several subroutines which have been tested and work pretty well.
dspyon – turns display on showing what is in memory
dspyof – turns display off
strtln – specifies line in mem for top of display
shftwd – my routine to shift a byte of data serially to DB0-DB7
write – after page, y-addres, and number of writes have been set
and content of byte to be written have been set, it
writes up to 64 byte-columns (1/2 of screen) across the screen
setpg – allows page to be set from 0 to 7
sety – allows Y address to be set from 0 to 64
reset – resets the LCD
enabx – performs an enable, enabling the action specified by the information on
the bus DB0-DB7 and setting of D/I pin and R/W pin.

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After much effort, I have made my HELLO WORLD pgm on a graphic LCD.
ALLELUJAH !!!

HERE IT IS!

I have set about programming a graphics type liquid crystal display. It’s specs are 128 X 64. The RAM memory on the device is like a bit map of the display.
The one’s and zeros in memory make up the picture displayed.
I haven’t gotten it to work yet , but the hardware and wiring have been completed.

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