drivers/lcd/tft/readme.txt

   1 TFT LCDs
   2 ========
   3
   4 The top level of this folder contains generic drawing routines for 16-bit TFT
   5 LCD displays.  The core drawing functions are defined in drawing.c, and the
   6 specific HW implementation of these routines (setting the individual pixels,
   7 initialising the display, etc.) takes place in a seperate HW drivers that
   8 implements the methods defined in lcd.h.  To change the LCD used, you simply
   9 need to change which HW-specific file is compiled and linked during the build
  10 process, without having to change anything else in your application code.
  11
  12 For example:
  13
  14 - main.c             - drawing.c          - hw\ili9325.c
  15 ----------------     ----------------     ----------------
  16   APPLICATION    --> GENERIC DRAWING  -->   SPECIFIC HW
  17      CODE        -->       CODE       -->      DRIVER
  18 ----------------     ----------------     ----------------
  19
  20
  21 drawing.c          Generic drawing routines such as drawing pixels, lines,
  22                    rectangles, as well as basic text-rendering.
  23
  24 lcd.h              This file contains the prototypes of HW-specific functions
  25                    that must be implemented in the LCD driver, since
  26                    drawing.c will redirect all requests to these lower level
  27                    functions.
  28
  29 touchscreen.c      Contains a very simple example of how to use ADC to read
  30                    the current position on a touchscreen.  No signal debouncing
  31                    takes places, and this code will need to be improved for us
  32                    in a real-world situation.
  33
  34 hw\*               HW-specific drivers based on lcd.h