From f30d6dd7858dfa3a0cf214113e8b1d45b30d74ce Mon Sep 17 00:00:00 2001
From: MakotoKurauchi <pluis@me.com>
Date: Fri, 13 Jul 2018 02:23:30 +0900
Subject: Helix config refine (#3374)

* helix config.h refine
---
 keyboards/helix/serial.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'keyboards/helix/serial.c')

diff --git a/keyboards/helix/serial.c b/keyboards/helix/serial.c
index 182f22219..591941587 100644
--- a/keyboards/helix/serial.c
+++ b/keyboards/helix/serial.c
@@ -110,16 +110,18 @@ void serial_master_init(void) {
 void serial_slave_init(void) {
   serial_input_with_pullup();
 
-#ifndef USE_SERIAL_PD2
+#if SERIAL_PIN_MASK == _BV(PD0)
   // Enable INT0
   EIMSK |= _BV(INT0);
   // Trigger on falling edge of INT0
   EICRA &= ~(_BV(ISC00) | _BV(ISC01));
-#else
+#elif SERIAL_PIN_MASK == _BV(PD2)
   // Enable INT2
   EIMSK |= _BV(INT2);
   // Trigger on falling edge of INT2
   EICRA &= ~(_BV(ISC20) | _BV(ISC21));
+#else
+ #error unknown SERIAL_PIN_MASK value
 #endif
 }
 
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