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