Resistive touch screen

Alen , please take a look at our AR1010 and AR1020 restistive touch screen controller ics , these devices offer a simple way of connecting resistive touch screens to your target system by converting the ohmic values into co-ordinate data that can be managed by the target controller.

They offer a great deal more too - these parts are supported by a dev tool DV102011.Many man years of experience have gone in to these parts to create an out of the box solution. You could of course try and do it all yourself in a PIC but you could be up and running in hours with the AR10X0 parts. Regards , Mike

Hi

Is the AR1000 touch controller used only for the touch interface or also for GUI? Or should I use another controller for GUI? How is the programming done for GUI.

Thank you

Alen, the AR1000 simply provides reliable touch coordinates to the target MCU , the target MCU will handle the GUI and probably the main application . Please look at our 16 or 32 bit MCUs and take a look at the info on this page of our website .

www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2608&param=en532067

Regards , Mike

Hi Alen,

At this stage it is important to be more specific about what you want to achieve.

This will enable us to make the best proposal.

1/ Which type of screen definition are you targeting : QVGA (320x240), VGA (640x480),... ?

2/ How many colours : 256 (8bits per pixel), 65536 (16 bits per pixel),.... ?

3/ Which type of PIC are you targeting (please understand that driving a QVGA colour LCD module will require at least a 16 or 32 bits) ?

As an input, Microchip provide out of the box graphics librairies able to drive LCD modules / glasses up to WQVGA resolution (480 x 272) with 16 bits colours and tactile input. In this particular case, the touch input is the onboard ADC of the PIC24 or PIC32 : http://www.microchip.com/Graphics

Hi

I am trying to build simple touch screen GUI for a small device.

I am targeting for a monochrome QVGA (320x240).

I would use a 24FJ PIC.

Please could you suggest any graphic controller and how to interface it with PIC and display.

P|ease could you also give an idea of what all main elements should come in the design.

Thank you very much

Alen

Hi,

Driving a monochrome QVGA with a PIC24F will be no issue. PIC24 are able to drive even 16/18 bits coloured QVGA displays.

The key point is that you must use a PIC24F with a PMP port to interface with external LCD module / or external controller (most of the PIC24 have a PMP port). You can make use of the free graphics libraries of Microchip or use your own. That will ease you design.

Another way to increase you learning speed is to take a training on graphics libraries from one of the 40 WW Regional Training Centers.

The class is called HIF 2131.

Regarding electrical connections, it will depend if you use an intelligent LCD module or a "glass".

To better understand these concepts, I suggest you watch the webseminars dedicated to this.

You can find them under the section "16-bit PIC MCUs & dsPIC DSCs"

There are also some videos on Youtube about this on the Microchip channel : http://www.youtube.com/user/MicrochipTechnology

Do not hesitate to check out the dedicated Microchip forum on Graphics libraries

regards