triangularwave.~c

单片机开发资料光盘-双龙-686M.zip

#include <io8515.h>             
#include <math.h>               
#define uchar unsigned char
#define uint unsigned int
void delay(void)          
{
}
void main(void)                 
{
 uchar c;
 DDRA=0xff;                      
 for (;;)
   {
    for (c=0x00;c<0xff;c++)    
      {
       PORTA=c;                 
       delay();
      } 
    for (c=0xff;c>0x00;c--)    
     {
      PORTA=c;                 
      delay();
      }
  }                              
}