diff -r 2405aff29a51 -r f4e250d5402b blackbox/lowlevel.c
--- a/blackbox/lowlevel.c	Tue Nov 15 12:51:04 2011 +0100
+++ b/blackbox/lowlevel.c	Wed Nov 16 12:29:09 2011 +0100
@@ -42,10 +42,18 @@
 }
 
 void init_hardware(void) {
+    // reset all ports to input, no pullup
+    DDRA = 0; PORTA = 0;
+    DDRB = 0; PORTB = 0;
+    DDRC = 0; PORTC = 0;
+    DDRD = 0; PORTD = 0;
+
+
     RS232_init(); // initialize RS485 interface
     RS232_puts_p(PSTR("CARRERA beta loading\n"));
 
     initADC();
+    SFIOR = 0;
 
     // set LED output
     DDR(LED1_PORT) |= _BV(LED1);
@@ -59,11 +67,17 @@
 
     // switch pull-ups
     SW_FUEL_PORT |= _BV(SW_FUEL);
+    SW_START_PORT |= _BV(SW_START);
+    SW_PACECAR_PORT |= _BV(SW_PACECAR);
 
+    // control outputs
+    DDR(LAP_COUNTER_PORT) |= _BV(LAP_COUNTER);
+
+    // setup rail control
     //RAIL_DETECT_PORT |= _BV(RAIL_DETECT); // enable internal pull-up
     DDR(RAIL_POWER_PORT) |= _BV(RAIL_POWER);
 
-
+    // display init sequence on LEDs
     LED(1, 1); _delay_ms(50);
     LED(2, 1); _delay_ms(50);
     LED(3, 1); _delay_ms(50);
@@ -82,15 +96,13 @@
 
 
     // setup data bit timer
-    TCCR2 = (1<<CS21); //divide by 8
-    TCCR2 |= (1<<WGM21); // set compare match
+    TCCR2 = (1<<CS21) | (1<<WGM21); //divide by 8, set compare match
     OCR2 = TIMER2_50US;
     TIMSK |= 1<<OCIE2; //enable timer2 interrupt
 
     // setup data packet timer
     //TCCR1A = (1<<COM1A1);
-    TCCR1B = (1<<CS11); //divide by 8
-    TCCR1B |= (1<<WGM12); // set compare match
+    TCCR1B = (1<<CS11) | (1<<WGM12); //divide by 8, set compare match
     //TCCR1B = (1<<CS11) | (1<<CS10); //divide by 64
     //TCNT1 = TIMER_7500NS;
     OCR1A = TIMER1_7500NS;