may be your delay is too small for your multimeter to pick up hence so..
#include <lpc21xx.h>
void delay(void);
int main(void)
{
IO0DIR = 0xFFFFFFFF; // Configure all pins on Port 0 as Output
while(1)
{
IO0SET = 0xFFFFFFFF; // Turn on LEDs
delay();
IO0CLR = 0xFFFFFFFF; // Turn them off
delay();
}
return 0; // normally this wont execute
}
void delay(void)
{
int z,c;
c=0;
for(z=0; z<4000000; z++) // You can edit this as per your needs
{
c++; // something needs to be here else KEIL compiler will remove the for loop!
}
}i had been through some of the forums on same processor u are using with keil as compiler the header file they had included was:
#include "lpc21xx_keil.h"void delay(unsigned int );
void main(void)
{
//initialsie here
//set port pins & call delay
delay(9999);
//clear port pins & call delay
delay(9999);
}
void delay(unsigned int y)
{
unsigned int z=0,c=0;
for(;y>0;y--)
{
for(z=0;z<9999;z++)
{
c++;
}
}
}#include <lpc21xx.h>
void delay(void);
int main(void)
{
IO0DIR = 0xFFFFFFFF; // Configure all pins on Port 0 as Output
while(1)
{
IO0SET = 0xFFFFFFFF; // Turn on LEDs
delay();
IO0CLR = 0xFFFFFFFF; // Turn them off
delay();
}
return 0; // normally this wont execute
}
void delay(void)
{
int z,c;
c=0;
for(z=0; z<4000000; z++) // You can edit this as per your needs
{
for(c=0;c<100;c++);
}
}