I2C lcd ( arduino ) with PICBASIC, help

[EarlyBird2]

Does this code work?

If it does we can use it as a starting point and adapt it for your use.

[iw2fvo]

Thanks Steve for the kind assistance,
I can not test the code soon : the day before yesterday my display went off. I ordered another one and will be here in two weeks tiime.
Anyway : the dispaly is exactly the same of the one shown in the images attached to the link you have sent to me.
I really think that a smart code to control the i2c LCD will be appreciate by a lot of people that use PBP.
Thanks a lot for helping.
Regards,
Ambrogio

[EarlyBird2]

Let me know when you have a replacement. I am confident that we can get this to work between us. You do the testing and I will help with the programing.

I would do it all but I do not have the hardware anymore as I went over to touch screen PLCs. I am more interested in touch screen GLCD solutions based on a PIC (Amicus18 for example) which I need the hardware for.

[iw2fvo]

Thanks Steve,
I do appreciate your help. I will tell you as soon as I have the new dispaly in my hands.
Ambrogio

[iw2fvo]

Hi Steve,
I received the new display just now.
It is equipped with the PCF 8574T.
It is connected to the QC2004A display in the following way:

pin_4 p0 > RS
pin_5 p1 > RW
pin_6 p2 > enable
pin_7 p3 > Backlight
pin_9 p4> data4
pin_10 p5 > data5
pin_11 p6 > data6
pin_12 p7 > data7

It is different wrt the one I had before: it has a different connections between the PCF and the LCD.
I will be ready for testing tomorrow or monday: please suggest me what trials to do just to start.
Thanks for all
Ambrogio

[EarlyBird2]

We start with Darrel's routine for PBP3 and make changes for your LCD pin setup and PBP2.x

http://support.melabs.com/threads/98...F8574-20x4-LCD

[iw2fvo]

Steve,
the point is that I do not have PBP_3.
My pbp is 2.50 B.
No arraywrite or read, no usercommand ... are available to me .
Thanks
Ambrogio