From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 18 May 2013 15:55:21 +0000 (+0300)
Subject: Set UCSR0A in serial_init
X-Git-Url: http://git.tdb.fi/?p=model-railway-devices.git;a=commitdiff_plain;h=2658995b11690b4d54409eb066020aba17395680

Set UCSR0A in serial_init

It contains the U2X0 bit, which must be cleared to get the desired
bitrate.  Some versions of the Arduino bootloader appear to leave it
set.
---

diff --git a/common/serial.c b/common/serial.c
index 2bf6901..a5e5cae 100644
--- a/common/serial.c
+++ b/common/serial.c
@@ -11,6 +11,7 @@ void serial_init(uint16_t baud)
 	baud = (F_CPU/16+baud/2)/baud-1;
 	UBRR0H = baud>>8;
 	UBRR0L = baud;
+	UCSR0A = 0;
 	UCSR0C = BIT(UCSZ00) | BIT(UCSZ01);  // 8N1
 	UCSR0B = BIT(RXEN0) | BIT(TXEN0) | BIT(RXCIE0);
 }