HD44780

the2nd · ‎2003-04-21

Posted on April 22, 2003 at 06:49

HD44780

the2nd · ‎2003-04-17

Posted on April 17, 2003 at 12:05

I'm trying to work with the HD44780-based LCD-module. When I'm using an emulator (Visual Micro Lab), it seems to be ok - there is such object in the program, so I can see the status of the LCD-module, it's initialized, and I can display any messages. But if I burn this program to work with the real LCD-module (ST6220F, ST6220C), I donn't have any results - the module seems to be not working (I've tried 3 modules, so the problem is not the defect display). If anybody has worked this LCD-modules, it will be very kind to send me an initialize procedure.

With best wishes in a hope

simonharrison9 · ‎2003-04-17

Posted on April 17, 2003 at 12:58

Hi,

I've used them a lot.

Can you give some info:

1. the connections you are using?

2. what type of display 16x2, 20x4 etc?

3. are you using 4bit or 8bit mode?

I'll post some code - it will be for the raisonance tool

Simon

[ This message was edited by: sjh on 12-11-2003 16:22 ]

the2nd · ‎2003-04-21

Posted on April 22, 2003 at 06:41

Thank you for you help!

That's the answers:

1. pb3-pb0 - data lines (D8-D5)

pb7 - RS

pb5 - RW

pb6 - E

2. 16*2

3. 4 bit

If it's possible, could you send the example connection of V+, GND and contrast, I'm not sure in the connection I did

With best regards, Aleksej

simonharrison9 · ‎2003-04-21

Posted on April 22, 2003 at 06:49

Hi,

Thanks, I'll post some code later.

Simon