//This program reads JA.4 to JA.7 and writes to User LEDs (LD1 to LD4)
//Connect the switches to JA.4 to JA.7 (the lower pins of JA in the socket)
//The program is in AVR assembly. Make the hex file using AVR Studio IDE.
//For more information see www.microdigitaled.com and digilentinc.com

#include <avr/io.h>

int main ()
{
	DDRA = 0x00;	//JA as input
	DDRE = 0xF0;	//JC as output

	PORTA = 0xFF;	//make pull-up resistors active

	while (1)
	{
		PORTE = PINA & 0xF0;	//send the high nibble of JA to the LEDs
	}
}