LCD truble!!! is not possible but ...

[Acktung]

I have a problem whit a 4x20 LCD Display whit ks0073 controller ...

my init string is: {0x20 | (lcd_type << 2), 0xc,1,6}

my memory map is

line1 0x80
line2 0xc0
line3 0x94
line4 0xd4


ok ... so I write 12 characters for any line and this is my lcd:


____________________
|111111111111________|
|________333333333333|
|222222222222________|
|________444444444444|

(this "_" a blank digit!!)

if i write 20 character my display is :

____________________
|11111111111111111111|
|11111111333333333333|
|22222222222222222222|
|22222222444444444444|

but i have think to write this:

____________________
|11111111111111111111|
|22222222222222222222|
|33333333333333333333|
|44444444444444444444|

i use lcd420.c library ... and for write i use the lcd_putc("1111111111111111111\n"); command ....

the memory over my lcd is bad?
what is wrong?

help me please ... tanks!

[PCM programmer]

If you look at the data sheet for the KS0073, on page 14, it shows
the line addresses for a 4x20 display should be 0, 0x20, 0x40, 0x60.
http://www.microtipsusa.com/driver_pdfs/samsung/KS0073.PDF

Edit the lcd_gotoxy() routine in the CCS driver, to use those values
(of course, also set the top bit = 1). See if that fixes the problem.
The changes are shown below in bold:

[Acktung]

whit your adress the lcd is like this:
____________________
|44444444444411111111|
|11111111____________|
|33333333333333333333|
|33333333____________|

?

there are someone that have idea?

[newguy]

Try this:

line1 = 0
line2 = 0
line3 = 20
line4 = 20

To set the cursor at position x of line 1:

address = line1 + x - 1
lcd_send_byte(0, 0x80 | address)

To set the cursor at position x of line 2:

address = line2 + x - 1
lcd_send_byte(0, 0xC0 | address)

To set the cursor at position x of line 3:

address = line3 + x - 1
lcd_send_byte(0, 0x80 | address)

To set the cursor at position x of line 4:

address = line4 + x - 1
lcd_send_byte(0, 0xC0 | address)

[Acktung]

OK i have resolved ... ... whith the datasheet i have resolved ...

I hope that this can help others that use EA DIP204-4NLED ELECTRONIC ASSEMBLY display as me.

So for solve the problem the libray lcd420.c is good but the INIT_STRING is a little different ... whit this work good!!!!

BYTE const LCD_INIT_STRING[7] = {0x20,0x24,0x9,0x28,0xf,0x1,0x6};

by by

[Acktung]

and it is clear ... the init function become:

void lcd_init() {
BYTE i;

set_tris_b(LCD_WRITE);
lcd.rs = 0;
lcd.rw = 0;
lcd.enable = 0;
delay_ms(15);
for(i=1;i<=3;++i) {
lcd_send_nibble(3);
delay_ms(5);
}
lcd_send_nibble(2);
for(i=0;i<=6;++i)
{
lcd_send_byte(0, LCD_INIT_STRING[i]);
}

}

[PCM programmer]

There were two different sets of line addresses that were
proposed for use with a 4x20 LCD.

Which line addresses were correct for your LCD ?

[Acktung]

the adress is standard ....

case 1 : address=0x80;break;
case 2 : address=0xA0;break;
case 3 : address=0xC0;break;
case 4 : address=0xE0;break;


in any case this controller is 100% compatible con hitachi but the library lcd420.c don't init correctly this controller ...