Hi,
I got me 5 pieces of 4.3" touch screens. It should be same as the lcd described here that is already working:
http://gplsquared.com/eoma_boot/eoma_boot.html#working_lcd
It has something extra - 4 wires for a touch interface - resistive.
The signal pins are marked: 37 XR Touch panel XR 38 YD Touch panelYD 39 XL Touch panel XL 40 YU Touch panel YU
They were purchased from Aliexpress - (cheaper when I bought it). http://www.aliexpress.com/item/4-3-inch-KD43G18-40NB-A1-KD43G18-A5-4-3-C430P...
Any ideas which cheapie chips best to use with EOMA68-A20 to get touch screen operational?
I assume it has to be I2C and somehow a bit of driver software will run and convert the I2C signals to mouse movements.
Any pointers appreciated.
On Fri, 2013-11-01 at 13:55 +0000, joem wrote:
Hi,
I got me 5 pieces of 4.3" touch screens. It should be same as the lcd described here that is already working:
http://gplsquared.com/eoma_boot/eoma_boot.html#working_lcd
It has something extra - 4 wires for a touch interface - resistive.
The signal pins are marked: 37 XR Touch panel XR 38 YD Touch panelYD 39 XL Touch panel XL 40 YU Touch panel YU
They were purchased from Aliexpress - (cheaper when I bought it). http://www.aliexpress.com/item/4-3-inch-KD43G18-40NB-A1-KD43G18-A5-4-3-C430P...
Any ideas which cheapie chips best to use with EOMA68-A20 to get touch screen operational?
I assume it has to be I2C and somehow a bit of driver software will run and convert the I2C signals to mouse movements.
Any pointers appreciated.
oliv3r in #linux-sunxi give suggestion - the cubieboard has touch interface on connector U14 - TP-X1, TP-X2, TP-Y1, TP-Y2, connect those up, and then load driver sun4i_ts.ko and tune it, and it should just work :)
I got cubieboards to try out with - so I try that weekend and then document it all.
something from TI http://www.ti.com/product/tsc2017 ahh i remember the TSC series well.... :) they have debounce and so on. my first reverse-engineering experience dealing with those f****rs in the wince HTC smartphones - drivers will be in the linux kernel now but back then there weren't any, and it wasn't clear in the datasheet that the ICs *only* respond if you write *two* bytes (one is a zero-pad) followed by read two bytes... hmmm memory's fuzzy... that might have been SPI...
anyway take a look joe, on TI's site: there's plenty to choose from.
l.
On Fri, Nov 1, 2013 at 1:55 PM, joem joem@martindale-electric.co.uk wrote:
Hi,
I got me 5 pieces of 4.3" touch screens. It should be same as the lcd described here that is already working:
http://gplsquared.com/eoma_boot/eoma_boot.html#working_lcd
It has something extra - 4 wires for a touch interface - resistive.
The signal pins are marked: 37 XR Touch panel XR 38 YD Touch panelYD 39 XL Touch panel XL 40 YU Touch panel YU
They were purchased from Aliexpress - (cheaper when I bought it). http://www.aliexpress.com/item/4-3-inch-KD43G18-40NB-A1-KD43G18-A5-4-3-C430P...
Any ideas which cheapie chips best to use with EOMA68-A20 to get touch screen operational?
I assume it has to be I2C and somehow a bit of driver software will run and convert the I2C signals to mouse movements.
Any pointers appreciated.
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