arch/avr/examples/led_blink/main.c

/* =============================================================================

    Copyright (c) 2008 Pieter Conradie [www.piconomic.co.za]
    All rights reserved.
    
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     distribution.
    
    * Neither the name of the copyright holders nor the names of
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    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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    Title:          Atmel AVR LED Blink example
    Author(s):      Pieter.Conradie
    Creation Date:  2007-04-27
    Revision Info:  $Id: main.c 123 2010-07-27 20:17:20Z pieterc1973@gmail.com $
 
============================================================================= */

/** 
 * @ingroup AVR_EXAMPLES
 * @defgroup AVR_LED_BLINK /led_blink
 * 
 * This example outputs a string on the serial port and toggles the LED once a 
 * second. 
 *  
 * Files: 
 * - arch/avr/examples/led_blink/main.c 
 *  
 * The following modules are exercised: 
 * - @ref AVR_SYSTMR 
 * - @ref PRINTF_MODULE 
 * - @ref UART0 
 * - @ref TMR 
 * - @ref PICONOMIC_AB111_4
 * 
 */

/* _____STANDARD INCLUDES____________________________________________________ */
#include <avr/interrupt.h>

/* _____PROJECT INCLUDES_____________________________________________________ */
#include "common.h"
#include "systmr.h"
#include "printf.h"
#include "uart0.h"
#include "tmr.h"

/* _____LOCAL DEFINITIONS____________________________________________________ */

/* _____MACROS_______________________________________________________________ */

/* _____GLOBAL VARIABLES_____________________________________________________ */

/* _____LOCAL VARIABLES______________________________________________________ */

/* _____LOCAL FUNCTION DECLARATIONS__________________________________________ */

/* _____LOCAL FUNCTIONS______________________________________________________ */

/* _____PUBLIC FUNCTIONS_____________________________________________________ */
int main(void)
{
    tmr_t tmr;

    // Initialise the board
    board_lowlevel_init();

    // Enable LED
    LED_ON();

    // Initialise modules
    uart0_init(115200, 8, UART0_NO_PARITY, 1);
    printf_init();
    systmr_init();

    // Enable interrupt
    sei();

    PRINTF("Atmel AVR LED Blink example\n");

    // Initialise timer to expire once a second
    tmr_start(&tmr, TMR_TICKS_PER_SEC);

    for(;;)
    {
        // Wait until timer has expired
        while(!tmr_has_expired(&tmr))
        {
            ;
        }
        // Reset timer
        tmr_reset(&tmr);

        // Toggle LED pin
        LED_TOGGLE();
    }
}

/* _____LOG__________________________________________________________________ */
/*

 2009-02-17 : Pieter.Conradie
 - First release
   
*/

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