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I would like to know if somebody has ever developped code to interface a graphic-tactile screen ? I have a varitronix DTPLCM 128128 lcd screen and it is the first time I have to use such a thing! I am searching for any documentation related to this kind of material Best regards, Manu
I connected a '167 to the Optrex DMF-50773 (240x128 B&W). Depending on the LCD controller chip, the physical connection is usually simple using the external data, address & control busses. The DMF-50773 uses a Toshiba T693C controller. Communication with the LCD is also straigt forward. My application required extensive graphics and scalable fonts so the LCD was run in pure graphics mode and new scalable fonts were built into the program. Almost all graphics primitives can be based on either a 'line' or 'fill' functions. For lines I used the 'mid-point' algorithm and for fill I created an algorithm due to the lack of resources (stack space). All code was written in 'C'. Higher levels included windows, buttons, text, pulldowns, ... The programming is not hard but can be time consuming. The resistive touch screen has the ability to have voltages implanted in any direction and the inputs are fed to the '167's A/D convertor. You can find some good articles in Embedded Systems Programming and other magazines aimed below the desktop market. Best luck
Thanks a lot for all this informations! best regards, Manu