README.LED_display 891 B

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  1. LED display internal API
  2. =======================================
  3. This README describes the LED display API.
  4. The API is defined by the include file include/led-display.h
  5. The first step in to define CONFIG_CMD_DISPLAY in the board config file.
  6. Then you need to provide the following functions to access LED display:
  7. void display_set(int cmd);
  8. This function should control the state of the LED display. Argument is
  9. an ORed combination of the following values:
  10. DISPLAY_CLEAR -- clear the display
  11. DISPLAY_HOME -- set the position to the beginning of display
  12. int display_putc(char c);
  13. This function should display it's parameter on the LED display in the
  14. current position. Returns the displayed character on success or -1 in
  15. case of failure.
  16. With this functions defined 'display' command will display it's
  17. arguments on the LED display (or clear the display if called without
  18. arguments).