8051 Code for triangular wave,sqaure wave,saw tooth

Triangular wave

#include<reg52.h>
void main(void)
{
unsigned int i;
while(1)
{
for(i=0;i<0xFF;i++)
P1=i;
for(i=0xFF;i>0;i--)
P1=i;
}

}

Square wave

#include<reg52.h>

void delay(void);

void main(void)

{

while(1)

{

delay();

P1=0xFF;

delay();

P1=0x00;

}

}

void delay(void)

{

unsigned int i,j,k,l;

 for(k=0;k<50;k++);

for(j=0;j<1257;j++);

for(l=0;l<50;l++);

for(i=0;i<1257;i++);

}

saw tooth

#include<reg52.h>

void main(void)

{

unsigned int i;

while(1)

{

for (i=0;i<0xFF;i++)

P1=i;

}

}