diff --git a/newcode/main.c b/newcode/main.c
index a111ff8..56a2f5f 100644
--- a/newcode/main.c
+++ b/newcode/main.c
@@ -34,6 +34,15 @@ void init_timer_100us(){
     TCC0.INTCTRLA |= TC_OVFINTLVL_HI_gc;
 }
 
+void io_setup(void){
+    // LED
+    PORTD.DIRSET = 1 << 5;
+
+    // pullups for address switch
+    PORTCFG.MPCMASK = 0xFF;
+    PORTC.PIN1CTRL = PORT_OPC_PULLUP_gc;
+}
+
 void modbusGet(void) {
 	if (modbusGetBusState() & (1<<ReceiveCompleted))
     {
@@ -50,17 +59,18 @@ void modbusGet(void) {
 
 int main(void){
     init_clk();
-    PORTD.DIRSET = 1 << 5;
+    io_setup();
+
+    // blink LED on startup
     PORTD.OUTTGL = 1 << 5;
     _delay_ms(500);
     PORTD.OUTTGL = 1 << 5;
 
+    // init pt100 stuff
     adc_init();
     dma_init();
 
-    PORTCFG.MPCMASK = 0xFF;
-    PORTC.PIN1CTRL = PORT_OPC_PULLUP_gc;
-
+    // setup modbus tick timer
     init_timer_100us();
 
     PMIC.CTRL |= PMIC_LOLVLEN_bm | PMIC_MEDLVLEN_bm | PMIC_HILVLEN_bm;