15
Hello,
I would like to use a 15" Touch Screen LCD monitor with an application running on a Propeller chip. I understand these Touch Screens have a standard video connector and a USB connection for the touch screen grid. The USB connection works like a mouse and in a standard PC machine these monitors are plug and play with some of them needing some drivers installation.
The application I would like to develop is small but will need a touchscreen of the side mentioned above. Since the Propeller has Video output and Mouse input I think it should be possible to use a touchscreen.
Does anyone experimented with a touchscreen of this side? Any suggestion or recommendation will be appreciated.
Thanks in advance
Luis
I would like to use a 15" Touch Screen LCD monitor with an application running on a Propeller chip. I understand these Touch Screens have a standard video connector and a USB connection for the touch screen grid. The USB connection works like a mouse and in a standard PC machine these monitors are plug and play with some of them needing some drivers installation.
The application I would like to develop is small but will need a touchscreen of the side mentioned above. Since the Propeller has Video output and Mouse input I think it should be possible to use a touchscreen.
Does anyone experimented with a touchscreen of this side? Any suggestion or recommendation will be appreciated.
Thanks in advance
Luis
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Don't visit my new website...
The size of the monitor must be larger than 10" and 15" is ideal for the application I am trying to use.
There are many "websites" that sell this type of LCD touchscreen, one is Tigerdirect but there are many others.
Thanks
Luis.
-Phil
I have found them very helpfull, and willing to send a detailed description of the Data Packet sent from the screen. When I get back to the office I will put it up.
Rick
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You need an older style touch monitor which has serial output. These are commonly used with Point of Sale PC's at restaurants etc. I think they are still available, perhaps from ELO or 3M
I have experience interfacing Gunze (Japan) 15" touch panels via serial... I'm guessing you don't want to build your own monitors/panel PCs from scratch, though?
Gunze have small touch panel converter modules which covert the 4/5/8 wire touch signals to RS232 or USB. You could always hack your preferred monitor to make it output serial instead of USB
Ah, so! I've always wondered what was inside one of those little adapters to deal with the "USB conversion". You've just saved me the trouble of cannibalizing one to find ... nothing!
-Phil
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Life may be "too short", but it's the longest thing we ever do.
Thank you very much for all the answers and suggestions. The serial port connection might be the best way to go.
As a matter of fact, I saw those USB to PS/2 adapters and thought to connect the Touchscreen into this USB-PS/2 and then into the Prop.
Too simple!!!.
I will experiment a bit and see what I can come up with. I will publish my findings in this forum so someone else might use it as well.
Thank you again.
Luis.
Luis, you can certainly try that. I fear it may indeed be "too simple" and won't work straight up.
Using a "dumb" USB to PS2 adapter relies on the USB chip inside the touch screen supporting "dual mode" - USB and PS2. I'm talking about chips like Cypress Encore series (or others from TI etc) which are often used in keyboards and mice. Some touch screens have a specific driver to interpret their proprietry data stream - in which case it wouldn't would with the Prop's PS2 Mouse Object without modification.
Do you already have a touchscreen and if so, what model? Perhaps we can shed some more light on this
Years ago in one of my windows applications, I took a serial touch screen in, did my own calibration and processing on it and simply emitted absolute mouse move and mouse button events directly into the windows event queue. It worked a treat and meant you could plug in any number of touch screens to use this application with out any driver installation required on the PC. As a bonus, if the application was minimised the touch screen continued to work just like a mouse.
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Life may be "too short", but it's the longest thing we ever do.