Added examples.

ard/example/analog_output.c

@@ -0,0 +1,43 @@
+#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(A1, INPUT);
+	pin_mode(6, OUTPUT);
+	pin_mode(11, OUTPUT);
+}
+
+unsigned char pwm = 0;
+
+void loop(){
+	int analog = map(analog_read(A1), 0, 1023, 0, 255);
+	analog_write(11, analog);
+
+	if(analog < 128){
+		digital_write(6, HIGH);
+	}
+	else{
+		digital_write(6, LOW);
+	}
+
+	char out[15];
+	sprintf(out, "%d", analog);
+	serial_write(out, 15);
+}