From d9eb5c76032867f2f1f03d591c61c59be799fa7a Mon Sep 17 00:00:00 2001
From: Björn Stenberg <bjorn@haxx.se>
Date: Thu, 28 Mar 2002 15:09:10 +0000
Subject: First version

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@60 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/serial.c | 82 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 firmware/serial.c

(limited to 'firmware/serial.c')

diff --git a/firmware/serial.c b/firmware/serial.c
new file mode 100644
index 0000000000..1269083aab
--- /dev/null
+++ b/firmware/serial.c
@@ -0,0 +1,82 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 by Alan Korr
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include <serial.h>
+#include <lcd.h>
+
+#define TDRE 7 /* transmit data register empty */
+#define RDRF 6 /* receive data register full   */
+#define ORER 5 /* overrun error                */
+#define FER  4 /* frame   error                */
+#define PER  3 /* parity  error                */
+
+static int serial_byte,serial_flag;
+
+void serial_putc (char byte) 
+	{
+    static int i = 0;
+		while (!(QI(SCISSR1) & (1<<TDRE)));
+		QI(SCITDR1) = byte;
+		clear_bit (TDRE,SCISSR1);
+    lcd_goto ((i++)%11,1); lcd_putc (byte);
+	}
+
+void serial_puts (char const *string) 
+	{
+    int byte;
+		while ((byte = *string++))
+ 			serial_putc (byte);
+	}
+
+int serial_getc( void )
+	{
+		int byte;
+		while (!serial_flag);
+    byte = serial_byte;
+    serial_flag = 0;
+		serial_putc (byte);
+		return byte;
+	}
+
+void serial_setup (int baudrate) 
+	{ 	
+  	QI(SCISCR1) =
+  	QI(SCISSR1) =
+  	QI(SCISMR1) = 0;
+  	QI(SCIBRR1) = (PHI/(32*baudrate))-1;	
+  	QI(SCISCR1) = 0x70; 
+	}
+
+#pragma interrupt
+void REI1 (void)
+  {
+		clear_bit (FER,SCISSR1);
+  }
+
+#pragma interrupt
+void RXI1 (void)
+  {
+    serial_byte = QI(SCIRDR1);
+    serial_flag = 1;
+		clear_bit (RDRF,SCISSR1);
+    if (serial_byte == '0')
+      lcd_turn_off_backlight ();
+    if (serial_byte == '1')
+      lcd_turn_on_backlight ();
+  }
-- 
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