Driver and interface for Kyocera 320×240 QVGA LCD

This paper is presenting the authors´ realization of an original, tested and applied driver and interface - called D/I - made for QVGA LCD with Touch Screen, type Kyocera KCG057QV1. We proposed, to achieve with a reduced number of components, a set of important functions: interface signal generation, display data generation, touch screen interface, power supply command sequences generation, USB and RS232/485 interface, back light signal generation, screen memory, character generator. All of these functions are controlled with a single LSI integrated circuit: the multiprocessor microcontroller Propeller-P8X32A, made by Parallax Inc. This allows the development of a complex driver and interface for which, since not so long ago, there were used industrial microcomputer modules or specialized FPGA circuits. Even in these conditions, the generation of fast synchronization signals was possible only through rapid timing, by calculating the effective duration of the performed machine code instructions, used in Propeller Driver Objects written in assembly language. This paper is focused on presenting this issue.