Someone has GLCD JHD12864E in their projects

[kontermas]

A few weeks ago buy JHD12864E screen with KS0108 controller and do not see nothing.
View DataSheet: http://www.egochina.net.cn/e-shop/eb.../JHD12864E.pdf
Anyone know if this is compatible with Proton GLCD.
Thanks ..

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[milom]

Yes, it's compatible...

[kontermas]

I wonder where failure because neither the source nor the wiring, I can not see anything at all on the display.
With the Proteus simulator works fine, but riding on the PCB Board and the protoboard not work at all.

Get me out of doubt.
Thank you very much.

This is the code:
__________________________________________________ ____

Device 16F877A
Xtal 4

CData $00,$00,$00,$00,$00,$00 ' 0
CData $FF,$FF,$FF,$FF,$FF,$FF ' 1
CData $07,$07,$07,$00,$00,$00 ' 2
CData $00,$00,$00,$07,$07,$07 ' 3
CData $E0,$E0,$E0,$00,$00,$00 ' 4

All_Digital=true
Declare LCD_Type Samsung
Declare LCD_Interface 8

Declare LCD_DTPort = PORTD
Declare LCD_CS1Pin = PORTE.1
Declare LCD_CS2Pin = PORTE.2
Declare LCD_RWPin = PORTC.0
Declare LCD_RSPin = PORTC.1
Declare LCD_ENPin = PORTE.0

Declare GLCD_CS_Invert On 'OFF
Internal_Font = On
Font_Addr = 1

Cls
Circle 1,96,31,31
Line 1,96,31,96,6
Line 1,96,31,115,31
Print At 140,5,"Hello"
DelayMS 1000

End
Include "FONT.INC"

Diagram connection :

[pic-ignorant]

I can't remember exactly, but sshouldn't the bottom of the contrast pot be connected to 5v, not 0v, if it is negative vee?


Regards
John

[kontermas]

I do not understand, I'll leave the part of the pin configuration especially VEE VEE =-10V the datasheet, (I use an external source that will give me-10V).
and as I have it connected.

Thank you.

DataSheet Pin 18 VEE:



Diagram conection view VEE??

[pic-ignorant]

1 end of VR to 5v. The other end to pin 18 (VEE on datasheet, -Vout on your schematic) and the wiper to V0 (Pin 3)
Are you able to adjust the contrast up and down?

John

[kontermas]

If It´s ok, doesn´t work...



Poten Pins:
1 to 5V Board
2 FREE (Nothing)
3 to 18 Pin (VEE)

3 Pin (VO) to GND Board.

THX.

[pic-ignorant]

Pin 2 should be on Vo. If you can't get the screen to go dark, then you might have a dead glcd

[kontermas]

The contrast work fine, but I still see nothing on the screen.
See foto:


Thanks.

[pic-ignorant]

Try adding ALL_DIGITAL TRUE to your code, I see you have 3 pins on PortE analogue pins