1 reply to this topic

[FredOrJoeBlogs]

Hi,

 

I have got one of the el'chepo 1602 LCD with the I2C backpacks. I have got it working under Python on a Raspberry PI, so I know its not a hardware issue.  I have ported the python to C# and the adapted it to work with the SoftwareI2C from Al Moyle and the SoftwareI2CBus from "TechWithDave"

 

Everything seems to be working well SetPosition (1,0) goes to the first character on the top line.

When I try and write some text to the display, the text is shifted right by 10 characters.  i.e Instead of "Hello World!" I get "Hello ".

 

Has anyone seen anything similar? Or can anyone spot my stupid mistake?

 

Hopefully the code should be attached (apart from main which is {LCDDisplay.TestProgram();} )

 

Thanks in advance

FOJB

Attached Files

•  I2CBaseSlave.cs   4.58KB   29 downloads
•  LCDDisplay.cs   7.84KB   32 downloads
•  SoftwareI2C.cs   11.02KB   24 downloads
•  SoftwareI2CBus.cs   6.66KB   17 downloads

[sjmill01]

I know this is an old post, but I was fighting getting a LCD to work with I2C until I found this code.  So, I thought I'd post the solution for others.

 

 

I found the reason your display was not performing well.  It has some bits set for scrolling.  So, you can add spaces to the end of the text to be sure it scrolls enough.

 

Or, change this line:

command((byte)Registers.CMD_Entry_Mode | (byte)RegisterOptions.OPT_Increment | (byte)RegisterOptions.OPT_Display_Shift);

to this...

command((byte)Registers.CMD_Entry_Mode | (byte)RegisterOptions.OPT_Increment );