RE: [lcd4linux] problem with i2c connected LCD display

[Luis.F.Correia <Lui...@se...>]

Hi!

> -----Original Message-----
> From: paul kamphuis [mailto:pau...@xs...] 
> Sent: Wednesday, February 09, 2005 12:39 PM
> 
> Is there anyone using lcd4linux in combination with an 
> HD44780 based LCD 
> display connect via i2c bus?
> 
> I am using a PCF8574 i2c 8-bits IO extender to connect the 
> LCD display.
> The i2c is detect by i2cdetect on device id 26 (hex)
> 
> in lcd4linux.conf I have the following display definition:
> 
> Display HD44780-I2C {
>         Driver 'HD44780'
>         Bus 'i2c'
>         Port '/dev/i2c-0'
>         Device '0x26'
>         UseBusy '1'
>         Bits '4'
>         Size '16x2'
>         Wire {
>                  RW 'DB4'
>                  RS 'DB5'
>                  ENABLE 'DB6'
>                  GPO 'GND'
>         }
> }
> 
> But when I run lcd4linux I get the following output:
> 
> Version 0.9.11 starting
> lcd4linux.c: initializing driver HD44780-I2C {
> lcd_init(HD44780-I2C {) failed: no such display
> 
> I tried different device id's (26, 38 ) to no effect. What is it I am 
> missing here?
> 
> Any help/suggestions appreciated
> 
> Paul

I never got to finish the code I had done to support I2C under lcd4linux.
But beware, it is probably unusable as it is very very slow...
That is the main reason for my lack of interest on the project.

Luis