# xmpl_leds.c - Using the LED Macros

## LED Macro Example

    /* $Id$ */
    /* Example use of the LED macros */

    #include "board.h"
    #include "ioutil.h"
    #include "xmpl.h"

    #ifdef NO_LEDS
    # error "No LED Interface defined"
    #endif

    int main(void)
    {
        volatile uint8_t c,x;

        LED_INIT();

        /* step 1: test the LED_TOGGLE macro */
        LED_SET_VALUE(0);
        WAIT_MS(500);
        for (c=0; c<LED_NUMBER; c++)
        {
            for (x=0; x<16; x++)
            {
                LED_TOGGLE(c);
                WAIT_MS(100);
            }
        }

        /* step 2: set each individual LED to on */
        LED_SET_VALUE(0);
        WAIT_MS(500);
        for (c=0; c<LED_NUMBER; c++)
        {
            LED_SET(c);
            WAIT_MS(500);
        }

        /* step 3: set each individual LED to off */
        for (c=0; c<LED_NUMBER; c++)
        {
            LED_CLR(c);
            WAIT_MS(500);
        }

        /* step 4: dislay BCD coded numbers from 0 to LED_MAX_VALUE */
        LED_SET_VALUE(0);
        WAIT_MS(500);
        for (c=0; c<=LED_MAX_VALUE;c++)
        {
            LED_SET_VALUE(c);
            WAIT_MS(500);
        }

        /* step 5: terminate in endless blinking loop */
        do
        {
            LED_SET_VALUE(0x55);
            WAIT_MS(500);
            LED_SET_VALUE(0xaa);
            WAIT_MS(500);
        }while(1);
    }
    /* EOF */