Using Nokia LCD

[tahirmaqsood]

proton id and DEVICE 16f628a

[fratello]

Because this topic it's still "hot" I wonder if somebody have meeting this problem : I bought some Nokia 3310 displays and bottom of display appears these stranges characters...using same code and hardware (see post #169). The results on display are like in picture (original vs fake; both display look hardware just the same). Suggestions ?! Thanks !

[ScaleRobotics]

Not sure if this will help, but I did notice a difference in the way we initialize the display.

Try adding some time, and another pause after, and see if that helps.

  Low Lcd_RST
  pause 50
  High Lcd_RST
  pause 50

Otherwise, my only advice would be to try to get from same manufacturer. One display seems to have the part number info on it, the other does not. Is the one with the part info printed on it the working one?

[fratello]

Even with "pause 100" don't work ; still "fleas". And yes, the display with part info printed work good. The last line it's with problem !!!! She don't want to be erased !! I try another program and look at differences. First two foto are with good display; "main" program - and, after LCD_clear , "set" display. The last two are with "fake" display. The last line remain from "main" program display !!!

[Gusse]

Even with "pause 100" don't work ; still "fleas". And yes, the display with part info printed work good. The last line it's with problem !!!! She don't want to be erased !! I try another program and look at differences. First two foto are with good display; "main" program - and, after LCD_clear , "set" display. The last two are with "fake" display. The last line remain from "main" program display !!!

LCD seems to work OK if you can write text to it, to all 6 rows. Try some PAUSE after Lcd_Clear -command if that will make any difference. Could it be so that LCD controller is quite slow and next command will override Lcd_Clear. Just speculations ...

BR,
-Gusse-

[fratello]

Thanks for repply ! But...with "Pause" (10-200 !) it's worst !

[Gusse]

Are you using similar LCD_Clear code as in post #161?

Would code below make any difference?
At least it has worked for me very well with several different 3310 LCD modules.

<code><font color="#000000">Lcd_Data        <b>VAR BYTE </b>[6]

Lcd_Clear:
    PosX=0:PosY=0:<b>GOSUB </b>Lcd_GotoXY
    <b>HIGH </b>Lcd_DC
    Lcd_Data(0)=0:Lcd_Data(1)=0:Lcd_Data(2)=0:Lcd_Data(3)=0:Lcd_Data(4)=0:Lcd_Data(5)=0
    <b>FOR </b>Char=1 <b>TO </b>84
    <b>GOSUB </b>Write_LCD
    <b>NEXT </b>Char
    <b>RETURN

</b>Write_LCD:
    <b>SHIFTOUT </b>SDIN,SCK,1,[ Lcd_Data(0),Lcd_Data(1),Lcd_Data(2),Lcd_Data(3),Lcd_Data(4),Lcd_Data(5) ]
    <b>RETURN

</b></code>

BR,
-Gusse-