Setup timing better (fuses, clock speed, TCB clock speed)

src/sniffer.c

@@ -23,6 +23,7 @@
 #include <avr/interrupt.h>
 #include <avr/io.h>
 #include <avr/sfr_defs.h>
+#include <avr/xmega.h>
 #include <stdint.h>
 
 #include "avclandrv.h"
@@ -217,6 +218,8 @@ void Setup() {
   printAllFrames = 1;
   echoCharacters = 1;
 
+  _PROTECTED_WRITE(CLKCTRL.MCLKCTRLB, (CLK_PRESCALE | CLK_PRESCALE_DIV));
+
   general_GPIO_init();
 
   // Setup RTC as 1 sec periodic timer