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Interface any sensor or display device with any controller.
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  • HD 44780 controlled LCD are simple and inexpensive, many embedded applications require the display of both graphics and text.
  • For a project requiring LCD graphics, integrated system that includes graphics controller can be used.
  • The parameters to be considered are size, number of x-y pixels, colors, contrast, brightness and power.
  • The display systems include touch panel.
  • Interface board includes a Graphical Processing Unit (GPU) which handles graphical functions in background.
  • GPU a similar to a CPU, in executing instructions, except that it performs many functions through graphics.
  • RAM contains 1, 2 or 3 buffers and each buffer contains a mixture of graphics and text elements to draw on the display. The flash memory can hold GPU programs.
  • The GPU coordinates the transfer of data from the front buffer to the display with interfacing with master controller.
  • Master microcontroller communicates with graphics system using RS 232 serial communication.
  • Manufacturers producing LCD often produce integrated graphic controllers.

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