New Propeller Platform shield for 3.5" touchscreens: PTP2
Rayman
Posts: 14,877
I've been testing this prototype of a new shield/breakout for my 3.5" touchscreens and it's working!
Here are the improvements:
1. Only requires the upper row of pins, P16..P31
2. Does this using 4 pins of an I2C PCA9554 I/O expander, leaving 4 digital I/O pins for other uses
3. Brings out the 4 analog voltage/battery voltage ADC inputs of the touchscreen chip for other uses.
4. Uses 8 pins for colors, increasing color depth from 6-bit to 8-bit.
5. Board is much smaller, should cost less.
Here's a screen shot:
But, right now, I'm considering adding in the lower row of Prop Platform pins, even though they aren't used. I think that will make it easier for people to mount and be more secure. But, it will add to the cost a hair...
More info on PTP2 is here: http://www.rayslogic.com/Propeller/Products/PTP2/PTP2.htm
Here are the improvements:
1. Only requires the upper row of pins, P16..P31
2. Does this using 4 pins of an I2C PCA9554 I/O expander, leaving 4 digital I/O pins for other uses
3. Brings out the 4 analog voltage/battery voltage ADC inputs of the touchscreen chip for other uses.
4. Uses 8 pins for colors, increasing color depth from 6-bit to 8-bit.
5. Board is much smaller, should cost less.
Here's a screen shot:
But, right now, I'm considering adding in the lower row of Prop Platform pins, even though they aren't used. I think that will make it easier for people to mount and be more secure. But, it will add to the cost a hair...
More info on PTP2 is here: http://www.rayslogic.com/Propeller/Products/PTP2/PTP2.htm
748 x 561 - 187K
748 x 561 - 224K
Comments
MountianKing Technology gave me at UPEW 2012..
It actually works very nicely and looks great.
I had to add in washers between the top bezel and the plate underneat to make the touchscreen work,
but othewise works perfectly.
Jonathan
http://www.mountainkingtech.com/
I've been wanting to get into a touch screen.
This looks like it may be just the trick!!
Thanks, Ray.
Richard