Speed up bit-banged USART code in the AVRISP project.

[pub/USBasp.git] / Projects / XPLAINBridge / Lib / SoftUART.h

diff --git a/Projects/XPLAINBridge/Lib/SoftUART.h b/Projects/XPLAINBridge/Lib/SoftUART.h
index d992966..844c896 100644 (file)
--- a/Projects/XPLAINBridge/Lib/SoftUART.h
+++ b/Projects/XPLAINBridge/Lib/SoftUART.h
@@ -1,14 +1,15 @@
 /*\r
 /*\r

-\r
-       soft_uart\r
-\r
-       Copyright John Steggall 2009\r
-\r
+             LUFA Library\r
+     Copyright (C) Dean Camera, 2009.\r
+              \r
+  dean [at] fourwalledcubicle [dot] com\r
+      www.fourwalledcubicle.com\r

 */\r
 \r
 */\r
 \r

-\r

 /*\r
 /*\r

-  Copyright 2009  John Steggall (steggall.j@gmail.com)\r
+  Copyright 2009  David Prentice (david.prentice [at] farming [dot] uk)\r
+  Copyright 2009  Peter Danneger\r
+  Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)\r

 \r
   Permission to use, copy, modify, and distribute this software\r
   and its documentation for any purpose and without fee is hereby\r
 \r
   Permission to use, copy, modify, and distribute this software\r
   and its documentation for any purpose and without fee is hereby\r


@@ -29,31 +30,31 @@
   this software.\r
 */\r
 \r
   this software.\r
 */\r
 \r

-/* \r
-  Specifically designed for the xplain board, other uses could be made by furkling through the code\r
-  and replacing the port and pin assignments. Also relies on and external interupt to detect the low\r
-  level of the start bit, in this case INT0.\r
-  Always configured to 9600baud. Can be changed by setting the BITLENGTH define to F_CPU/(desired baud)\r
-  code may need optimising when getting any faster to sample the bit in the correct place. No \r
-  compensation has been made for the response time of the int routine.\r
- */\r
-\r
-#ifndef UART_SOFT_H\r
-#define UART_SOFT_H\r
+#ifndef _SOFT_UART_\r
+#define _SOFT_UART_\r

 \r
 \r

-       /*  initialises software uart and enables transmit */\r
-       extern void SoftUART_Init(void);\r
+       /* Includes: */\r
+               #include <avr/io.h>\r
+               #include <avr/interrupt.h>\r
+               #include "SoftUART.h"\r

 \r
 \r

-       /* checks if there is a byte in the receive buffer*/\r
-       extern unsigned char SoftUART_IsReceived(void);\r
+       /* Macros: */\r
+               #define BAUD       9600\r
+               #define BIT_TIME   (uint16_t)((F_CPU + (BAUD / 2)) / BAUD)\r

 \r
 \r

-       /*  returns the received byte */\r
-       extern unsigned char SoftUART_RxByte(void);\r
+               #define SRX        PD0\r
+               #define SRXPIN     PIND\r
+               #define SRXPORT    PORTD\r

 \r
 \r

-       /* starts a byte send and returns the byte to be sent */\r
-       extern unsigned char SoftUART_TxByte(unsigned char data);\r
+               #define STX        PD1\r
+               #define STXPORT    PORTD\r
+               #define STXDDR     DDRD\r

 \r
 \r

-       /* Simulates polling UDRE to see if tx buffer is empty and ready */\r
-       extern unsigned char SoftUART_IsReady(void);\r
+       /* Function Prototypes: */\r
+               unsigned char SoftUART_IsReady(void);\r
+               unsigned char SoftUART_TxByte(unsigned char c);\r
+               unsigned char SoftUART_IsReceived(void);\r
+               unsigned char SoftUART_RxByte(void);\r
+               void SoftUART_Init(void);\r

 \r
 \r

-#endif\r
+#endif
\ No newline at end of file