Dlo7135

[ngeronikolos]

Hello doys,

Does anyboby of you use ever DLO7135 Dot Matrix Intelligent Display?
I am trying to connect 8 Matrix's with a PIC (or two)!!

I need infornations!!!!

Tha is the datasheet.

[ngeronikolos]

Please boys(!) I need your usefull help!!!!!!!

[mister_e]

i've never use those display but... can you try the following code and let us know ???

TRISB=0 ' set PORTB as output
TRISA=0 ' Set PORTA as output

DataPORT      var PORTB
CS            var PORTA.0
WR            var PORTA.1

CharacterLoop VAR BYTE

cs=1 ' disable 
wr=1 ' disable 
pause 50

Start:

      For characterloop=0 to 127
          dataport = characterloop
          pause 10
          cs=0 ' enable chip
          pause 10 ' wait to stabilize display data
          WR = 0 ' send data to display
          pause 10 '
          wr = 1
          pause 10
          cs = 1
          pause 1000
      next
      goto start

[Bruce]

Looks relatively straight forward after a quick peek at the datasheet.

1. Place your data on D0 to D6 using the Character Set shown in the datasheet. I.E. $41 would write an "A" to the display.
2. Take CE (chip enable) low on the display you want to display the character on.

Note: Data & CE must be stable before & after step 3.

3. Toggle WR from 1-0-1.
4. Return CE to logic 1.

CE allows you to place several displays on the same data bus & select (chip enable) individual units on the bus to write data to.

WR is used to strobe data into the display that's selected with CE.

Display brightness is controlled by the logic levels on pins 5 & 6 as shown in Table 3.

I haven't used this particular display, but I have used the HDSP-2112. http://www.rentron.com/PicBasic/Movi...ge_Display.htm