asifsalam96
Posts: 3
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Duel 7 in raspberry touch screen display

Wed Dec 09, 2015 2:07 pm

Hello Team,

I have a project which required connecting two 7 inch touch screens (Raspberry Pi 7" Touchscreen Display) to raspberry device and get display and touch response from both the screen.
There will be only single display session and both the screen should show the same display and should be able to control/touch input.


Something like this ---> http://www.aures-pos.fr/actus-img/wp-co ... ESA_01.jpg
Is this possible?

Please let me know if you need any more information regarding the same.

karlkiste
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Re: Duel 7 in raspberry touch screen display

Thu Dec 10, 2015 5:54 am

For two displays you'll need two Pis. Perhaps with some buffers/drivers the display might be copied, but that would probably need a custom PCB, at least for the FFC connectors.

Combining the two touch inputs will be the hard thing. I wouldn*t even think about trying that.

Using two B+ Pis, connecting via network and doing the copying using VNC is the way to go.


Greets,
Kiste

fruitoftheloom
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Re: Duel 7 in raspberry touch screen display

Thu Dec 10, 2015 8:34 am

asifsalam96 wrote:Hello Team,

I have a project which required connecting two 7 inch touch screens (Raspberry Pi 7" Touchscreen Display) to raspberry device and get display and touch response from both the screen.
There will be only single display session and both the screen should show the same display and should be able to control/touch input.


Something like this ---> http://www.aures-pos.fr/actus-img/wp-co ... ESA_01.jpg
Is this possible?

Please let me know if you need any more information regarding the same.
https://www.raspberrypi.org/products/co ... opment-kit

The board hosts 120 GPIO pins, an HDMI port, a USB port, two camera ports and two display ports.

http://uk.rs-online.com/web/p/processor ... ts/8134164
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6by9
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Re: Duel 7 in raspberry touch screen display

Thu Dec 10, 2015 9:13 am

fruitoftheloom wrote:https://www.raspberrypi.org/products/co ... opment-kit

The board hosts 120 GPIO pins, an HDMI port, a USB port, two camera ports and two display ports.

http://uk.rs-online.com/web/p/processor ... ts/8134164
Sadly I think the firmware will only work with one display on the CM at the moment, but that should be fixable given a bit of time.
You'll note when you configure the cameras that there is a 0 or 1 designation in the pins config dt-blob, but there isn't for the display. Initialisation looks at the one set of parameters and tries to initialise that.
Life may also be a little more complicated due to the Atmel processor on the display for touchscreen purposes and how to control two of those. Many of the drivers within the firmware are not written to support multiple instances, mainly due to laziness and a general expectation of only ever finding one of the device. With the display, you do have further fun over which display should be connected to the touchscreen and backlight control mailbox services, so it's not simply laziness.
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asifsalam96
Posts: 3
Joined: Wed Dec 09, 2015 1:32 pm

Re: Duel 7 in raspberry touch screen display

Thu Dec 10, 2015 9:33 am

Thanks all for the quick response :)

My ultimate aim is to create a POS machine like the one in the previous URL, which will have two displays, one for the salesman to scan product and do billing and at the mean time the second display facing customer which he can see the products and price of each product when the salesman scans the product .

Also at the end of the complete sale, we will have a pop-up window asking for feedback/rate the level of comfort/satisfaction in store for the customer.So both side touch response is important for me :(

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RaTTuS
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Re: Duel 7 in raspberry touch screen display

Thu Dec 10, 2015 9:35 am

2 RPi's would be fine you could have a model A+ and B2 linked via serial and use the B2 as uplink
or [or B+ and B2}
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PiGraham
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Re: Duel 7 in raspberry touch screen display

Thu Dec 10, 2015 9:46 am

Another option is to use the DPI screen and a HDMI connected touchscreen.

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RaTTuS
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Re: Duel 7 in raspberry touch screen display

Thu Dec 10, 2015 9:54 am

PiGraham wrote:Another option is to use the DPI screen and a HDMI connected touchscreen.
that would work
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asifsalam96
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Re: Duel 7 in raspberry touch screen display

Thu Dec 10, 2015 10:07 am

Thanks a lot PiGraham,this is a good idea !!!

I will try with a HDMI touch screen like http://www.ebay.in/itm/Waveshare-7-inch ... 4897.l4275 this

and a raspberry touch screen with DPI https://www.raspberrypi.org/blog/the-ea ... i-display/.


Will try this soon and let you all know .

PiGraham
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Re: Duel 7 in raspberry touch screen display

Thu Dec 10, 2015 10:53 am

asifsalam96 wrote:Thanks a lot PiGraham,this is a good idea !!!

I will try with a HDMI touch screen like http://www.ebay.in/itm/Waveshare-7-inch ... 4897.l4275 this

and a raspberry touch screen with DPI https://www.raspberrypi.org/blog/the-ea ... i-display/.


Will try this soon and let you all know .
Just be aware that display quality and touch characteristics can differ. A lot of cheap touch screens use resistive touch. Most modern devices, including the Pi display, use capacitive touch. Capacitive responds to a very light touch, resistive responds to pressure and will work with gloves or non-conductive stylus.

tinylcd
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Re: Duel 7 in raspberry touch screen display

Fri Dec 11, 2015 5:17 am

Hello

may be for POS application you can have high resolution 1024x600 screen with enclosure as below

http://www.neosecsolutions.com//product ... 2&cPath=21

regards
Tinylcd

Slackware
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Re: Duel 7 in raspberry touch screen display

Tue Jan 19, 2016 2:44 am

still 2 pi's. but xwindows allows remote displays. so use customers screen as a remote xclient. multiple inputs is not an issue.
I would look at having your salesman have a lockout from customer input till you are ready for it anyways.

much like those remote access services in windows that lets crooks control your windows computer remotely.

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