1 files changed, 59 insertions, 0 deletions
diff --git a/Projects/XPLAINBridge/Lib/SoftUART.h b/Projects/XPLAINBridge/Lib/SoftUART.h
new file mode 100644
index 000000000..d992966c0
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+++ b/Projects/XPLAINBridge/Lib/SoftUART.h
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+/*
+
+	soft_uart
+
+	Copyright John Steggall 2009
+
+*/
+
+
+/*
+  Copyright 2009  John Steggall (steggall.j@gmail.com)
+
+  Permission to use, copy, modify, and distribute this software
+  and its documentation for any purpose and without fee is hereby
+  granted, provided that the above copyright notice appear in all
+  copies and that both that the copyright notice and this
+  permission notice and warranty disclaimer appear in supporting
+  documentation, and that the name of the author not be used in
+  advertising or publicity pertaining to distribution of the
+  software without specific, written prior permission.
+
+  The author disclaim all warranties with regard to this
+  software, including all implied warranties of merchantability
+  and fitness.  In no event shall the author be liable for any
+  special, indirect or consequential damages or any damages
+  whatsoever resulting from loss of use, data or profits, whether
+  in an action of contract, negligence or other tortious action,
+  arising out of or in connection with the use or performance of
+  this software.
+*/
+
+/* 
+  Specifically designed for the xplain board, other uses could be made by furkling through the code
+  and replacing the port and pin assignments. Also relies on and external interupt to detect the low
+  level of the start bit, in this case INT0.
+  Always configured to 9600baud. Can be changed by setting the BITLENGTH define to F_CPU/(desired baud)
+  code may need optimising when getting any faster to sample the bit in the correct place. No 
+  compensation has been made for the response time of the int routine.
+ */
+
+#ifndef UART_SOFT_H
+#define UART_SOFT_H
+
+	/*  initialises software uart and enables transmit */
+	extern void SoftUART_Init(void);
+
+	/* checks if there is a byte in the receive buffer*/
+	extern unsigned char SoftUART_IsReceived(void);
+
+	/*  returns the received byte */
+	extern unsigned char SoftUART_RxByte(void);
+
+	/* starts a byte send and returns the byte to be sent */
+	extern unsigned char SoftUART_TxByte(unsigned char data);
+
+	/* Simulates polling UDRE to see if tx buffer is empty and ready */
+	extern unsigned char SoftUART_IsReady(void);
+
+#endif