lab3_1.c

// **************Program: lab3_1.c
// **************Programmer: put your name here!
// **************Date: put today's date here!
// **************Class: put your class here!
// **************Description: fill this in!
// ***************************#include statements
#include <ez8.h> // GPI/O definitions
// ***************************#define statements
// ***************************main() function
int main(void)
{
//variable declarations and assignments;
unsigned char leds=0x02;
unsigned char push_button;
push_button=0x00;

//initialize port A
PAADDR=0x02;
PACTL=0x00;
PAADDR=0x01;
PACTL=0xF8;
PAADDR=0x03;
PACTL=0x00;
PAADDR=0x00; // prevents inadvertent changes to sub registers

//initialize port C
PCADDR=0x02;
PCCTL=0x00;
PCADDR=0x01;
PCCTL=0x01;
PCADDR=0x00;

//light LEDs
PAOUT=leds;
while (1){
push_button=PCIN;
push_button=push_button & 0x01;
if(push_button==0x00){
leds=leds^0x07;
PAOUT=leds;
}
}
return 0;
}
//*****************************end of program