[Lcd4linux-devel] I2C modifications to HD44780 driver

[Luis C. <lfc...@lf...>]

Hi!

(This email is mainly directed to Paul and Michael)

during this small Easter break, I finnaly managed to take a deep look 
into the changes Paul has made to the HD44780 driver.
Here is a small patch to the drv_HD44780.c file, and two new files that 
abstract all I2C relevant code from the main driver.

To make this work at all, the ./configure scripts need to know about 
these new files. I'm not an expert with Makefiles, so Michael please 
help me with this one :)...
Unpack the attached file, apply the diff and copy the 
'drv_generic_i2c.[h,c]'.

This patchset is completely untested, as I don't currently have any I2C 
devices available for testing.

Paul, about the SIGNAL stuff, they are defined in the config file.
For example, my PCF based I2C used the same connections as the 4bit 
driver, Martin has made. This is the corresponding config entry:
Display HD44780-I2C {
    Driver 'HD44780'
    Model 'WRAP1C-PCF8574'
    Bus 'i2c'
    Port '/dev/i2c-0'
    Device '70'
    Bits '4'
    Size '20x4'
    asc255bug 0
    Icons 1
    Wire {
        RW     'DB5'
        RS     'DB4'
        ENABLE 'DB6'
        GPO    'GND'
    }
}

Basicly it is here where you say what is connected to where, although 
I'm not sure if it will work if it is wired differently then it is here...

Take a good shot at it and let me know.

Luis Correia, ashamed because it could not be tested... :(