From f69079913feeffaf14006bf426e564dfc49ed0d4 Mon Sep 17 00:00:00 2001
From: jesusc <jesusc@4a8a32a2-be11-0410-ad9d-d568d2c75423>
Date: Sun, 29 Oct 2006 20:55:38 +0000
Subject: [PATCH] device/include/mcs51/serial_IO.h: putchar() and getchar()
 using serial port.

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@4444 4a8a32a2-be11-0410-ad9d-d568d2c75423
---
 ChangeLog                        |  5 +++
 device/include/mcs51/serial_IO.h | 76 ++++++++++++++++++++++++++++++++
 2 files changed, 81 insertions(+)
 create mode 100644 device/include/mcs51/serial_IO.h

diff --git a/ChangeLog b/ChangeLog
index 6a811427..1120cd0e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2006-10-29 Jesus Calvino-Fraga <jesusc at ece.ubc.ca>
+
+	* device/include/mcs51/serial_IO.h: putchar() and getchar() using
+	  serial port.
+
 2006-10-29 Maarten Brock <sourceforge.brock AT dse.nl>
 
 	* device/include/malloc.h,
diff --git a/device/include/mcs51/serial_IO.h b/device/include/mcs51/serial_IO.h
new file mode 100644
index 00000000..0922f952
--- /dev/null
+++ b/device/include/mcs51/serial_IO.h
@@ -0,0 +1,76 @@
+/* Default putchar() and getchar() to the serial port
+
+   Written By -  Jesus Calvino-Fraga (October/2006)
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+*/
+
+#ifndef SERIAL_IO_H
+#define SERIAL_IO_H
+
+__sfr __at (0x87) SIO_PCON;
+__sfr __at (0x89) SIO_TMOD;
+__sfr __at (0x8D) SIO_TH1;
+__sfr __at (0x8B) SIO_TL1;
+__sfr __at (0x98) SIO_SCON;
+__sfr __at (0x99) SIO_SBUF;
+__sbit __at (0x8E) SIO_TR1;
+
+/*SCON bits*/
+__sbit __at (0x98) SIO_RI;
+__sbit __at (0x99) SIO_TI;
+__sbit __at (0x9A) SIO_RB8;
+__sbit __at (0x9B) SIO_TB8;
+__sbit __at (0x9C) SIO_REN;
+__sbit __at (0x9D) SIO_SM2;
+__sbit __at (0x9E) SIO_SM1;
+__sbit __at (0x9F) SIO_SM0;
+
+void inituart (unsigned char t1_reload)
+{
+	SIO_TR1=0;
+	SIO_TMOD=(SIO_TMOD&0x0f)|0x20;
+	SIO_PCON|=0x80;
+	SIO_TH1=SIO_TL1=t1_reload;
+	SIO_TR1=1;
+	SIO_SCON=0x52;
+}
+
+void putchar (char c)
+{
+	if((!SIO_SM0)&&(!SIO_SM1)) inituart(0xff);
+	if (c=='\n')
+	{
+		while (!SIO_TI);
+		SIO_TI=0;
+		SIO_SBUF='\r';
+	}
+	while (!SIO_TI);
+	SIO_TI=0;
+	SIO_SBUF=c;
+}
+
+char getchar (void)
+{
+	char c;
+	
+	if((!SIO_SM0)&&(!SIO_SM1)) inituart(0xff);
+
+	while (!SIO_RI);
+	SIO_RI=0;
+	c=SIO_SBUF;
+	return c;
+}
+#endif
-- 
2.30.2