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Help, please: MGLS240128 with T6963C !!!
http://forum.lcdinfo.com/viewtopic.php?f=9&t=295		 Page 1 of 1
Author:  Guest [ Fri Jul 25, 2003 17:58 ]
Post subject:  Help, please: MGLS240128 with T6963C !!!
Hello guys. I'm desperate. I've a LCD with the T6963C, and I'm trying to generate my owns characters, but I can't!! :cry:
The thing is, first my character generated is visible in the display when I try to use it, but only for a second (or less) and then, the character is gone. WHY??
I'm using a PIC 16F877 to make all the routines. My source code is this, more or less, because I can't put it all (it's too long), but the main instructions are:

movlw 0x00 LSB
movlw 0x00 MSB
movlw 0x40 Command

movlw 0x28 LSB
movlw 0x00 MSB
movlw 0x41 Command

movlw 0x00 etc...
movlw 0x80
movlw 0x42

movlw 0x1E
movlw 0x00
movlw 0x43

movlw 0x81 command

movlw 0x94 command

movlw 0x08
movlw 0x1C
movlw 0x24 command

movlw 0x03 LSB
movlw 0x00 MSB
movlw 0x22 command

movlw 0xB0 command

movlw 0x00 data
movlw 0x04 data
movlw 0x0E etc...
movlw 0x15
movlw 0x04
movlw 0x04
movlw 0x04
movlw 0x00

and then, I'm going to other routine, and I print this in the display

movlw 0x00
movlw 0x00
movlw 0x24 command

movlw 0xB0 command

movlw 0x28 'H'
movlw 0x2F 'O'
movlw 0x2C 'L'
movlw 0x21 'A'

movlw 0x81 --> this is my generated character
movlw 0x28 'H'
movlw 0x2F 'O'
movlw 0x2C 'L'
movlw 0x21 'A'


Finally, I can see in the LCD display this:

HOLA HOLA

Where is my own character generated??? Buuuu, buuuu :cry: :cry:

PLEASE HELP ME.....

P.D: sorry for my poor english.
Author:  pinitron [ Mon Jul 28, 2003 10:51 ]
Post subject:  I'm the "guest" before... the same person
I'm the "guest" before... the same person

Well.I've doing some tests with my LCD, and I still not found the problem. I've a question... There is a command to fix the characters generated in the display? It's really rare...

First I have:

HOLA :arrow: HOLA --> :arrow: is my own generated char

And, 0,5 second later, I have

HOLA HOLA --> my char is gone

Datasheet don't say nothing to fix characters in display. How can I show my char in display? HEEEELP, PLEASE!!! :cry: :(
Author:  pinitron [ Tue Jul 29, 2003 11:49 ]
Post subject: 
YEEEEEEEEEEEEEEEEEEEEEEEEES, YES YES!!!

OK, I've the solution!! The problem was, I was erasing the RAM after create my own character, because I was erasing the LCD to init the display... my program code was always doing:
first--> init LCD
second--> erase the RAM

And you must do:
first--> erase the RAM
second--> init LCD

I hope help somebody with the same problem... :wink:
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