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How to add a LCD (T6969 control) to ADuC7026?

Everything ARM and LPC

How to add a LCD (T6969 control) to ADuC7026?

By lilongsheng
-  Tue Feb 21, 2006 7:15 am #10153
:cry: when I added a LCD (T6969 control) to ADuC7026,meet a problem unexpected.
this a evulation board,just for learing ARM,so in this board ,there are only some features want to be achieved:
UART;
ADC0 (thermometer use the ADI's TMP36);
I2C(realtime cloclk use the intersil's isl1208);
20-pin standard ARM JTAG connector ;
Serial port connector (DB9-F) with MAX232 line driver ;
Four status/debug LEDs + RESET, BOOTLOAD, and INT0 pushbuttons
LCD(use T6963 control ,YM128×64F)

not use any enternal memory
I reference the Analog 's evulation board for ADuC7026,I do not know how to add this to desing,ever thought thousands times more,
"To access 128 k with an 8-bit
memory, an extra address line ( :arrow: A16) is provided. (See the
example in Figure 67.)"(in ADuC7026 datasheet from ADI.)and figure 3,4,67 :?: .really can not be understand.

I search for some help,now :cry:

T6963C for ARM

By JohnLeung
-  Tue Feb 21, 2006 8:58 am #10157
Do you mean accesing the 128k display ram of the LCD by 8-bit memory address? Have you tried the LCD with a common 8-bit mcu before?

I have a working code under www.TechToys.com.hk -> Download. The code is for PIC though. There are several low level routines leaving for modification. Hope you can find some insight from it.

John

thank you for your help ,I have other question ^_^

By lilongsheng
-  Tue Feb 21, 2006 11:11 pm #10194
I have read you web http://www.techtoys.com.hk/Downloads/T6 ... 2864-F.pdf
the LCD's interface, on my hand,is the same as yours,

I have ever add this LCD to 8051,the DB0-DB7 use 8051's P0 port;FG ,FSand VSS connect to GND ;RST indirect conect to +5V with a 4K resister ; Vo connect a external negative voltage;WR(write)conect to 8051's sixteenth pin;RD(read)connect to 8051's seventeenth pin;
CE(chip enable)connect to 8051's P2_7(28th pin);
C/D(command or data select)connect to 8051's P2_6(27th pin);

use Intel bus ,if I will define LCD's data port and command port:
#define T6963_DataPortOfYieJin 0x0000 //P2.6=CE=0,P2.7=C/D=0;
#define T6963_CtrOfYieJin 0x4000 //P2.6=CE=0,P2.7=C/D=1;

when I will write a data to LCD:
//CE=0,C/D=0
void T6963_writeAData(UNCHAR data1)/*reentrant*/
{
XBYTE[T6963_DataPortOfYieJin] = data1;
}

NOW ,the question is :if I want to acess the LCD's display RAM ,how to do it?
the figure 67 in AD7C7019_20_1_2_4_5_6_7_0.pdf (Figure 67. Interfacing to External EPROM/RAM),should I connect like a external ARM(128K*8bits)?
LCD's CE connect to ADuC7026's MS*?
How to deal with the ADuC7026's A16?
The LCD's C/D should connect to which one of the A0-A15,or maybe should connect to any others?
WR and RD connect like the external RAM ,show in figure 67?


Thank you once again for you help!
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