light3.c

用dsp程序实现点灯程序

#include "f2407_c.h"
#define LED port40
volatile ioport unsigned int port40;
extern void LEDTEST(unsigned int count);
extern void delay(unsigned int period);
void main(void)
{ 
   *WDCR  = 0x00E8;
   *SCSR1 = 0x00fd;
   *SCSR2 = (*SCSR2 | 0x000B) & 0x000F;
   WSGR = 0x01c0;
   *MCRA = 0x0003;                     /* group A pins */
   *MCRB = 0xFE1C;                     /* group B pins */
   *MCRC = 0x0000;                     /* group C pins */
   asm("	setc	INTM");
   *IMR = 0x0000;                      /* clear the IMR register */
   *IFR = 0xffff;                      /* clear any pending core interrupts */ 
   
     LEDTest(5);
     LED=0x00ff;
    }
   

LEDTest(unsigned int count)
{
   unsigned char i,t;
   LED=0xffff;
	for(;count!=0;count--)
  {
	for(t=0,i=1;t<8;)
	{
		LED=~i;
		delay(1500);
		i=i<<1;
		t++;
	}
  }
}
	
void delay(unsigned int period)
 {
  int periodi, periodj;
    
    for(periodi=0; periodi<period; periodi++)
    {
        for(periodj=0; periodj<period>>1; periodj++);
    }
    }