1 LED display internal API 2 ======================================= 3 4 This README describes the LED display API. 5 6 The API is defined by the include file include/led-display.h 7 8 The first step in to define CONFIG_CMD_DISPLAY in the board config file. 9 Then you need to provide the following functions to access LED display: 10 11 void display_set(int cmd); 12 13 This function should control the state of the LED display. Argument is 14 an ORed combination of the following values: 15 DISPLAY_CLEAR -- clear the display 16 DISPLAY_HOME -- set the position to the beginning of display 17 18 int display_putc(char c); 19 20 This function should display it's parameter on the LED display in the 21 current position. Returns the displayed character on success or -1 in 22 case of failure. 23 24 With this functions defined 'display' command will display it's 25 arguments on the LED display (or clear the display if called without 26 arguments). 27
