From: Michael Gernoth <michael@gernoth.net>
Date: Sun, 22 Aug 2010 22:40:19 +0000 (+0200)
Subject: don't initialize usart when not debugging
X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/rsbs2/commitdiff_plain/594d42a7b04f9f092d9a67bd3910442dc68f800b?ds=sidebyside

don't initialize usart when not debugging
---

diff --git a/bmc/usart.c b/bmc/usart.c
index 36ba83c..f92edbd 100644
--- a/bmc/usart.c
+++ b/bmc/usart.c
@@ -3,6 +3,8 @@
 
 #include "usart.h"
 
+#ifdef DEBUG
+
 #define UBRR_VAL ((F_CPU+BAUD*8)/(BAUD*16)-1)
 #define BAUD_REAL (F_CPU/(16*(UBRR_VAL+1)))
 #define BAUD_ERROR ((BAUD_REAL*1000)/BAUD)
@@ -22,9 +24,11 @@ int usart_put(char c, FILE *stream)
 }
 
 static FILE usart_stdout = FDEV_SETUP_STREAM(usart_put, NULL, _FDEV_SETUP_WRITE);
+#endif
 
 void usart_init()
 {
+#ifdef DEBUG
 	UCSRB |= (1<<TXEN);
 	UCSRC |= (1<<URSEL)|(1 << UCSZ1)|(1 << UCSZ0);
 
@@ -32,4 +36,5 @@ void usart_init()
 	UBRRL = UBRR_VAL & 0xFF;
 
 	stdout = &usart_stdout;
+#endif
 }