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Mike McGlade

Mike has 16 years of experience with Microchip products including MCU, Memory & Analog. He also has significant knowledge of lighting, safety & security and vending industries.

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Former Member over 15 years ago

I would like to use a resistive touch screen with a PIC controller. I don't have experience with touch screens.
How can I interface the touch screen with PIC? Should I use a touch controller?
What communication interface is mostly used for touch controllers (SPI,I2C,UART)?
How can I program the GUI? Is it done on the PIC or touch controller?
Is there any software form microchip for programming GUI?
Thanks very much
Alen
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Former Member over 15 years ago

I would like to use a resistive touch screen with a PIC controller. I don't have experience with touch screens.
How can I interface the touch screen with PIC? Should I use a touch controller?
What communication interface is mostly used for touch controllers (SPI,I2C,UART)?
How can I program the GUI? Is it done on the PIC or touch controller?
Is there any software form microchip for programming GUI?
Thanks very much
Alen
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MicrochipRTCfr over 15 years ago in reply to Former Member

Hi,

It depends what you want to do.
For resistive touchscreen you can either use the PIC onboard A/D converter or an external Touchscreen controller.
If you use the PIC onboard ADC significant computation will be needed to filter / shape the signals from the resistive inputs. This should be preferred if you use a more powerful PIC like 16 bits one or possibly also with PIC18. Of course the larger the screen & resolution the more computation will be needed.
On the other hand if you use a touchscreen controller like the AR1000 family from Microchip, you get a clean input as it takes care from all the filtering / sampling / averaging. No CPU bandwith is needed ;=)

If you want to get started fast, Microchip released a Touchscreen starterkit with PC GUI :
http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1406&dDocName=en543486

All details on the AR1000 familiy here :
http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2694&param=en543965

regards
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Former Member over 15 years ago in reply to MicrochipRTCfr

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
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