Moved driver to 'drivers' subdir

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@189 a1c6a512-1295-4272-9138-f99709370657

firmware/drivers/serial.c

@@ -0,0 +1,75 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   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"
+
+#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) 
+{
+    while (!(SSR1 & (1<<TDRE)));
+    TDR1 = byte;
+    clear_bit(TDRE,SSR1_ADDR);
+}
+
+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) 
+{ 	
+    SCR1 = 0;
+    SSR1 = 0;
+    SMR1 = 0;
+    BRR1 = (FREQ/(32*baudrate))-1;
+    SCR1 = 0x70;
+}
+
+#pragma interrupt
+void REI1 (void)
+{
+    clear_bit (FER,SSR1_ADDR);
+}
+
+#pragma interrupt
+void RXI1 (void)
+{
+    serial_byte = RDR1;
+    serial_flag = 1;
+    clear_bit(RDRF,SSR1_ADDR);
+}