blink_b.c

来自「本程序可实现在TOM320VC5402下的点灯效果」· C语言 代码 · 共 61 行

#include <type.h>
#include <board.h>


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

void myBlink(void);                    /* Periodic blink function */


/*****************************************************************************/
/* Global Variables                                                          */
/*****************************************************************************/

int currentLed;                        /* LED to be toggled next */


/*****************************************************************************/
/* void main(void)  -  MAIN                                                  */
/*                                                                           */
/* This functions initializes the "currentLed" variable.                     */
/*****************************************************************************/

void main(void)
{
    currentLed = BRD_LED0;             /* set LED to be toggled to LED 0 */
    
    return;
}


/*****************************************************************************/
/* void myBlink(void)  -  Periodic Blink Function                            */
/*                                                                           */
/* This function toggles one of the 3 board LED's based on the value of the  */
/* "currentLed" variable.  It is performed at a 750ms rate.                  */
/*****************************************************************************/

void myBlink(void)
{
    switch(currentLed)
    {
        case BRD_LED0:    brd_led_toggle(BRD_LED0);
                          currentLed = BRD_LED1;
                          break;

        case BRD_LED1:    brd_led_toggle(BRD_LED1);
                          currentLed = BRD_LED2;
                          break;    
		
        case BRD_LED2:    brd_led_toggle(BRD_LED2);
                          currentLed = BRD_LED0;
                          break;
        
        default:          return;
    }
    
    return;
}