avr/blink/helloworld2.c

   1 #define F_CPU 100000000UL // Sets up the default speed for delay.h
   2
   3 #include <avr/io.h>
   4 #include <util/delay.h>
   5
   6 //#include <compat/deprecated.h>
   7 /*
   8 variable = PINx;  // Read a byte from a port, replace x with the port number
   9 PORTx = variable; //Write a byte to a port
  10 PORTx |= 1<<pin_number;  // Set a pin in a port
  11 PORTx &= ~(1<<pin_number); // Clear a pin in a port
  12 */
  13
  14 void delay(unsigned int ms) {
  15   unsigned int i,j;
  16   for ( j=0; j<1000; j++)
  17     for ( i=0; i<ms; i++);
  18 }
  19
  20 int main (void){
  21
  22   //sbi(DDRD,PD5); /*enable port 5 for output*/
  23         DDRD |= 1<<5;
  24
  25   while (1) {
  26                 //cbi (PORTD, PD5);
  27                 PORTD &= ~(1<<5);
  28                 delay (500);
  29                 //sbi (PORTD, PD5);
  30                 PORTD |= 1<<5;
  31                 delay (500);
  32   }
  33
  34   return 0;
  35 }