blink.c

来自「一个基于dsp的灯闪实验程序」· C语言 代码 · 共 54 行

#include <board.h>


/*****************************************************************************/
/* Function Prototypes   */
/****************************************************************************/

/* This delay routine does not conflict with DSP/BIOS.  It is used in this  */
/* example rather than brd_delay_msec which causes DSP/BIOS conflicts just  */
/* because of this.  If you are not using DSP/BIOS, you can change the code */
/* to use brd_delay_msec.                                                   */

void delay(int); //function as delaying by software


/*****************************************************************************/
/* MAIN */
/*****************************************************************************/

void main()
{
	brd_init(100);
	
	/* blink all 3 DSK leds forever */
	while (1)
	{
		brd_led_toggle(BRD_LED0);

		/* brd_delay_msec(1000); */
		delay(1000);
        
		brd_led_toggle(BRD_LED1);

		/* brd_delay_msec(1000); */
		delay(1000);
        
		brd_led_toggle(BRD_LED2);
		
		/* brd_delay_msec(1000); */
		delay(1000);
	} 
}


void delay(int period)
{
    int i, j;
    
    for(i=0; i<period; i++)
    {
        for(j=0; j<period>>1; j++);
    }
}