Hello Troy,

I tried your method but was not successfull.

Now I need to update the firmware of my PIC microcontroller and I have lots of other work to do.

So, for now I will wait for your appnote on the touch screen fascility of the GTT.

Best regards,

Klaus de Jong

Hello,

I'm up and running with the GTT. I have a custom splash screen, some colored graphics and text on the screen.

But now I need some hints to get started with the touch screen.

Regards,

Klaus de Jong

Thanx for your help.

I swapped the jumpers and now the display is showing strings, it accepts commands and it 'beeps'.

Regards,

Klaus

Thanx for your help.

I swapped the jumpers and now the display is showing strings, it accepts commands and it 'beeps'.

Regards,

Klaus

from: GTT480272A Hardware Manual Revision 1.3

quote

Similarly, in order to change the display to TTL mode, simply remove the zero ohm resistors from the RS232 or I

OK, thank you Troy,

This way I should be able get the touchscreen to work. For receiving data on my uC I normally use an interrupt, that should be no problem. And, if needed I can write code for handling RTS and CTS.

But now the soldered jumpers. I closed two jumpers for the I2C bus, I now must ...

Hello Troy,

OK, in general TTL will be more easy.

But when I understand things right TTL will need hardware handshaking. This is not supported by my PIC C compiler.

Can I use 232TTL with just Tx and Rx ?

Klaus

Last week I received my new GTT480272A.
I plan to use it with a PIC microcontroller, my question is:

What is easier to start with: 232TTL or I2C ?

Regards,

Klaus de Jong