Added examples.

ard/example/digital.c

@@ -0,0 +1,39 @@
+#include <util/delay.h>
+#include <stdio.h>
+#include "ard/serial.h"
+#include "ard/pins.h"
+#include "ard/util.h"
+
+void prepare();
+void loop();
+
+int main(){
+	prepare();
+
+	while(1){
+		loop();
+	}
+}
+
+void prepare(){
+	// enable global interrupts and serial port
+	pins_init();
+	serial_init(9600);
+
+	pin_mode(11, OUTPUT);
+	pin_mode(10, INPUT);
+	pin_mode(8, INPUT);
+}
+
+unsigned char pwm = 0;
+
+void loop(){
+	if(digital_read(10) && digital_read(8)){
+		digital_write(11, HIGH);
+	}
+	else{
+		digital_write(11, LOW);
+	}
+
+	_delay_ms(25);
+}