diff options
author | Dean Camera <dean@fourwalledcubicle.com> | 2010-05-08 03:12:14 +0000 |
---|---|---|
committer | Dean Camera <dean@fourwalledcubicle.com> | 2010-05-08 03:12:14 +0000 |
commit | 071e02c6b6b4837fa9cf0b6d4c749994e02638d7 (patch) | |
tree | 960446788703b69f0bb285450be80c5b3d8cc22c /Projects/XPLAINBridge/Lib | |
parent | e331b531c6e6d93eb0eee42b9002074e8090ad18 (diff) | |
download | lufa-071e02c6b6b4837fa9cf0b6d4c749994e02638d7.tar.gz lufa-071e02c6b6b4837fa9cf0b6d4c749994e02638d7.tar.bz2 lufa-071e02c6b6b4837fa9cf0b6d4c749994e02638d7.zip |
Add svn:eol-style property to source files, so that the line endings are correctly converted to the target system's native end of line style.
Diffstat (limited to 'Projects/XPLAINBridge/Lib')
-rw-r--r-- | Projects/XPLAINBridge/Lib/RingBuff.c | 240 | ||||
-rw-r--r-- | Projects/XPLAINBridge/Lib/RingBuff.h | 232 | ||||
-rw-r--r-- | Projects/XPLAINBridge/Lib/SoftUART.c | 286 | ||||
-rw-r--r-- | Projects/XPLAINBridge/Lib/SoftUART.h | 118 |
4 files changed, 438 insertions, 438 deletions
diff --git a/Projects/XPLAINBridge/Lib/RingBuff.c b/Projects/XPLAINBridge/Lib/RingBuff.c index 2109f8cc0..91c61d06b 100644 --- a/Projects/XPLAINBridge/Lib/RingBuff.c +++ b/Projects/XPLAINBridge/Lib/RingBuff.c @@ -1,120 +1,120 @@ -/*
- LUFA Library
- Copyright (C) Dean Camera, 2010.
-
- dean [at] fourwalledcubicle [dot] com
- www.fourwalledcubicle.com
-*/
-
-/*
- Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
-
- Permission to use, copy, modify, distribute, and sell this
- software and its documentation for any purpose is hereby granted
- without fee, 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.
-*/
-
-#include "RingBuff.h"
-
-void Buffer_Initialize(RingBuff_t* const Buffer)
-{
- BUFF_ATOMIC_BLOCK
- {
- Buffer->InPtr = (RingBuff_Data_t*)&Buffer->Buffer;
- Buffer->OutPtr = (RingBuff_Data_t*)&Buffer->Buffer;
- Buffer->Elements = 0;
- }
-}
-
-void Buffer_StoreElement(RingBuff_t* const Buffer, RingBuff_Data_t Data)
-{
- BUFF_ATOMIC_BLOCK
- {
- #if defined(BUFF_DROPOLD)
- if (Buffer->Elements == BUFF_LENGTH)
- {
- Buffer->OutPtr++;
-
- if (Buffer->OutPtr == &Buffer->Buffer[BUFF_LENGTH])
- Buffer->OutPtr = (RingBuff_Data_t*)&Buffer->Buffer;
- }
- else
- {
- Buffer->Elements++;
- }
- #elif defined(BUFF_DROPNEW)
- if (Buffer->Elements == BUFF_LENGTH)
- return;
-
- Buffer->Elements++;
- #elif defined(BUFF_NODROPCHECK)
- Buffer->Elements++;
- #endif
-
- *(Buffer->InPtr) = Data;
- Buffer->InPtr++;
-
- if (Buffer->InPtr == &Buffer->Buffer[BUFF_LENGTH])
- Buffer->InPtr = (RingBuff_Data_t*)&Buffer->Buffer;
- }
-}
-
-RingBuff_Data_t Buffer_GetElement(RingBuff_t* const Buffer)
-{
- RingBuff_Data_t BuffData;
-
- BUFF_ATOMIC_BLOCK
- {
-#if defined(BUFF_EMPTYRETURNSZERO)
- if (!(Buffer->Elements))
- return 0;
-#elif !defined(BUFF_NOEMPTYCHECK)
- #error No empty buffer check behavior specified.
-#endif
-
- BuffData = *(Buffer->OutPtr);
-
- Buffer->OutPtr++;
- Buffer->Elements--;
-
- if (Buffer->OutPtr == &Buffer->Buffer[BUFF_LENGTH])
- Buffer->OutPtr = (RingBuff_Data_t*)&Buffer->Buffer;
- }
-
- return BuffData;
-}
-
-#if defined(BUFF_USEPEEK)
-RingBuff_Data_t Buffer_PeekElement(const RingBuff_t* const Buffer)
-{
- RingBuff_Data_t BuffData;
-
- BUFF_ATOMIC_BLOCK
- {
-#if defined(BUFF_EMPTYRETURNSZERO)
- if (!(Buffer->Elements))
- return 0;
-#elif !defined(BUFF_NOEMPTYCHECK)
- #error No empty buffer check behavior specified.
-#endif
-
- BuffData = *(Buffer->OutPtr);
- }
-
- return BuffData;
-}
-#endif
+/* + LUFA Library + Copyright (C) Dean Camera, 2010. + + dean [at] fourwalledcubicle [dot] com + www.fourwalledcubicle.com +*/ + +/* + Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com) + + Permission to use, copy, modify, distribute, and sell this + software and its documentation for any purpose is hereby granted + without fee, 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. +*/ + +#include "RingBuff.h" + +void Buffer_Initialize(RingBuff_t* const Buffer) +{ + BUFF_ATOMIC_BLOCK + { + Buffer->InPtr = (RingBuff_Data_t*)&Buffer->Buffer; + Buffer->OutPtr = (RingBuff_Data_t*)&Buffer->Buffer; + Buffer->Elements = 0; + } +} + +void Buffer_StoreElement(RingBuff_t* const Buffer, RingBuff_Data_t Data) +{ + BUFF_ATOMIC_BLOCK + { + #if defined(BUFF_DROPOLD) + if (Buffer->Elements == BUFF_LENGTH) + { + Buffer->OutPtr++; + + if (Buffer->OutPtr == &Buffer->Buffer[BUFF_LENGTH]) + Buffer->OutPtr = (RingBuff_Data_t*)&Buffer->Buffer; + } + else + { + Buffer->Elements++; + } + #elif defined(BUFF_DROPNEW) + if (Buffer->Elements == BUFF_LENGTH) + return; + + Buffer->Elements++; + #elif defined(BUFF_NODROPCHECK) + Buffer->Elements++; + #endif + + *(Buffer->InPtr) = Data; + Buffer->InPtr++; + + if (Buffer->InPtr == &Buffer->Buffer[BUFF_LENGTH]) + Buffer->InPtr = (RingBuff_Data_t*)&Buffer->Buffer; + } +} + +RingBuff_Data_t Buffer_GetElement(RingBuff_t* const Buffer) +{ + RingBuff_Data_t BuffData; + + BUFF_ATOMIC_BLOCK + { +#if defined(BUFF_EMPTYRETURNSZERO) + if (!(Buffer->Elements)) + return 0; +#elif !defined(BUFF_NOEMPTYCHECK) + #error No empty buffer check behavior specified. +#endif + + BuffData = *(Buffer->OutPtr); + + Buffer->OutPtr++; + Buffer->Elements--; + + if (Buffer->OutPtr == &Buffer->Buffer[BUFF_LENGTH]) + Buffer->OutPtr = (RingBuff_Data_t*)&Buffer->Buffer; + } + + return BuffData; +} + +#if defined(BUFF_USEPEEK) +RingBuff_Data_t Buffer_PeekElement(const RingBuff_t* const Buffer) +{ + RingBuff_Data_t BuffData; + + BUFF_ATOMIC_BLOCK + { +#if defined(BUFF_EMPTYRETURNSZERO) + if (!(Buffer->Elements)) + return 0; +#elif !defined(BUFF_NOEMPTYCHECK) + #error No empty buffer check behavior specified. +#endif + + BuffData = *(Buffer->OutPtr); + } + + return BuffData; +} +#endif diff --git a/Projects/XPLAINBridge/Lib/RingBuff.h b/Projects/XPLAINBridge/Lib/RingBuff.h index 2e03a28be..b4933aa4d 100644 --- a/Projects/XPLAINBridge/Lib/RingBuff.h +++ b/Projects/XPLAINBridge/Lib/RingBuff.h @@ -1,116 +1,116 @@ -/*
- LUFA Library
- Copyright (C) Dean Camera, 2010.
-
- dean [at] fourwalledcubicle [dot] com
- www.fourwalledcubicle.com
-*/
-
-/*
- Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
-
- Permission to use, copy, modify, distribute, and sell this
- software and its documentation for any purpose is hereby granted
- without fee, 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.
-*/
-
-/* Buffer Configuration: */
- /* Buffer length - select static size of created ring buffers: */
- #define BUFF_STATICSIZE 128 // Set to the static ring buffer size for all ring buffers (place size after define)
-
- /* Volatile mode - uncomment to make buffers volatile, for use in ISRs, etc: */
- #define BUFF_VOLATILE // Uncomment to cause all ring buffers to become volatile (and atomic if multi-byte) in access
-
- /* Drop mode - select behaviour when Buffer_StoreElement called on a full buffer: */
- #define BUFF_DROPOLD // Uncomment to cause full ring buffers to drop the oldest character to make space when full
- // #define BUFF_DROPNEW // Uncomment to cause full ring buffers to drop the new character when full
- // #define BUFF_NODROPCHECK // Uncomment to ignore full ring buffer checks - checking left to user!
-
- /* Underflow behaviour - select behaviour when Buffer_GetElement is called with an empty ring buffer: */
- //#define BUFF_EMPTYRETURNSZERO // Uncomment to return 0 when an empty ring buffer is read
- #define BUFF_NOEMPTYCHECK // Uncomment to disable checking of empty ring buffers - checking left to user!
-
- /* Buffer storage type - set the datatype for the stored data */
- #define BUFF_DATATYPE uint8_t // Change to the data type that is going to be stored into the buffer
-
- /* Peek routine - uncomment to include the peek routine (fetches next byte without removing it from the buffer */
- //#define BUFF_USEPEEK
-
-#ifndef _RINGBUFF_H_
-#define _RINGBUFF_H_
-
- /* Includes: */
- #include <avr/io.h>
- #include <avr/interrupt.h>
- #include <util/atomic.h>
- #include <limits.h>
-
- #include <LUFA/Common/Common.h>
-
- /* Defines and checks: */
- #if defined(BUFF_STATICSIZE)
- #define BUFF_LENGTH BUFF_STATICSIZE
- #else
- #error No buffer length specified!
- #endif
-
- #if !(defined(BUFF_DROPOLD) || defined(BUFF_DROPNEW) || defined(BUFF_NODROPCHECK))
- #error No buffer drop mode specified.
- #endif
-
- #if !defined(BUFF_DATATYPE)
- #error Ringbuffer storage data type not specified.
- #endif
-
- #if defined(BUFF_VOLATILE)
- #define BUFF_MODE volatile
- #define BUFF_ATOMIC_BLOCK ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
- #else
- #define BUFF_MODE
- #define BUFF_ATOMIC_BLOCK
- #endif
-
- #if (BUFF_STATICSIZE > LONG_MAX)
- #define RingBuff_Elements_t uint64_t
- #elif (BUFF_STATICSIZE > INT_MAX)
- #define RingBuff_Elements_t uint32_t
- #elif (BUFF_STATICSIZE > CHAR_MAX)
- #define RingBuff_Elements_t uint16_t
- #else
- #define RingBuff_Elements_t uint8_t
- #endif
-
- /* Type Defines: */
- typedef BUFF_DATATYPE RingBuff_Data_t;
-
- typedef BUFF_MODE struct
- {
- RingBuff_Data_t Buffer[BUFF_LENGTH];
- RingBuff_Data_t* InPtr;
- RingBuff_Data_t* OutPtr;
- RingBuff_Elements_t Elements;
- } RingBuff_t;
-
- /* Function Prototypes: */
- void Buffer_Initialize(RingBuff_t* const Buff);
- void Buffer_StoreElement(RingBuff_t* const Buffer, RingBuff_Data_t Data);
- RingBuff_Data_t Buffer_GetElement(RingBuff_t* const Buffer);
- #if defined(BUFF_USEPEEK)
- RingBuff_Data_t Buffer_PeekElement(const RingBuff_t* const Buffer);
- #endif
-
-#endif
+/* + LUFA Library + Copyright (C) Dean Camera, 2010. + + dean [at] fourwalledcubicle [dot] com + www.fourwalledcubicle.com +*/ + +/* + Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com) + + Permission to use, copy, modify, distribute, and sell this + software and its documentation for any purpose is hereby granted + without fee, 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. +*/ + +/* Buffer Configuration: */ + /* Buffer length - select static size of created ring buffers: */ + #define BUFF_STATICSIZE 128 // Set to the static ring buffer size for all ring buffers (place size after define) + + /* Volatile mode - uncomment to make buffers volatile, for use in ISRs, etc: */ + #define BUFF_VOLATILE // Uncomment to cause all ring buffers to become volatile (and atomic if multi-byte) in access + + /* Drop mode - select behaviour when Buffer_StoreElement called on a full buffer: */ + #define BUFF_DROPOLD // Uncomment to cause full ring buffers to drop the oldest character to make space when full + // #define BUFF_DROPNEW // Uncomment to cause full ring buffers to drop the new character when full + // #define BUFF_NODROPCHECK // Uncomment to ignore full ring buffer checks - checking left to user! + + /* Underflow behaviour - select behaviour when Buffer_GetElement is called with an empty ring buffer: */ + //#define BUFF_EMPTYRETURNSZERO // Uncomment to return 0 when an empty ring buffer is read + #define BUFF_NOEMPTYCHECK // Uncomment to disable checking of empty ring buffers - checking left to user! + + /* Buffer storage type - set the datatype for the stored data */ + #define BUFF_DATATYPE uint8_t // Change to the data type that is going to be stored into the buffer + + /* Peek routine - uncomment to include the peek routine (fetches next byte without removing it from the buffer */ + //#define BUFF_USEPEEK + +#ifndef _RINGBUFF_H_ +#define _RINGBUFF_H_ + + /* Includes: */ + #include <avr/io.h> + #include <avr/interrupt.h> + #include <util/atomic.h> + #include <limits.h> + + #include <LUFA/Common/Common.h> + + /* Defines and checks: */ + #if defined(BUFF_STATICSIZE) + #define BUFF_LENGTH BUFF_STATICSIZE + #else + #error No buffer length specified! + #endif + + #if !(defined(BUFF_DROPOLD) || defined(BUFF_DROPNEW) || defined(BUFF_NODROPCHECK)) + #error No buffer drop mode specified. + #endif + + #if !defined(BUFF_DATATYPE) + #error Ringbuffer storage data type not specified. + #endif + + #if defined(BUFF_VOLATILE) + #define BUFF_MODE volatile + #define BUFF_ATOMIC_BLOCK ATOMIC_BLOCK(ATOMIC_RESTORESTATE) + #else + #define BUFF_MODE + #define BUFF_ATOMIC_BLOCK + #endif + + #if (BUFF_STATICSIZE > LONG_MAX) + #define RingBuff_Elements_t uint64_t + #elif (BUFF_STATICSIZE > INT_MAX) + #define RingBuff_Elements_t uint32_t + #elif (BUFF_STATICSIZE > CHAR_MAX) + #define RingBuff_Elements_t uint16_t + #else + #define RingBuff_Elements_t uint8_t + #endif + + /* Type Defines: */ + typedef BUFF_DATATYPE RingBuff_Data_t; + + typedef BUFF_MODE struct + { + RingBuff_Data_t Buffer[BUFF_LENGTH]; + RingBuff_Data_t* InPtr; + RingBuff_Data_t* OutPtr; + RingBuff_Elements_t Elements; + } RingBuff_t; + + /* Function Prototypes: */ + void Buffer_Initialize(RingBuff_t* const Buff); + void Buffer_StoreElement(RingBuff_t* const Buffer, RingBuff_Data_t Data); + RingBuff_Data_t Buffer_GetElement(RingBuff_t* const Buffer); + #if defined(BUFF_USEPEEK) + RingBuff_Data_t Buffer_PeekElement(const RingBuff_t* const Buffer); + #endif + +#endif diff --git a/Projects/XPLAINBridge/Lib/SoftUART.c b/Projects/XPLAINBridge/Lib/SoftUART.c index 31b11c1cf..194481d0e 100644 --- a/Projects/XPLAINBridge/Lib/SoftUART.c +++ b/Projects/XPLAINBridge/Lib/SoftUART.c @@ -1,143 +1,143 @@ -/*
- LUFA Library
- Copyright (C) Dean Camera, 2010.
-
- dean [at] fourwalledcubicle [dot] com
- www.fourwalledcubicle.com
-*/
-
-/*
- Copyright 2010 David Prentice (david.prentice [at] farming [dot] uk)
- Copyright 2010 Peter Danneger
- Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
-
- Permission to use, copy, modify, distribute, and sell this
- software and its documentation for any purpose is hereby granted
- without fee, 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.
-*/
-
-#include "SoftUART.h"
-
-volatile uint8_t srx_done, stx_count;
-volatile uint8_t srx_data, srx_mask, srx_tmp, stx_data;
-
-uint8_t SoftUART_IsReady(void)
-{
- return !(stx_count);
-}
-
-uint8_t SoftUART_TxByte(uint8_t Byte)
-{
- while (stx_count);
-
- stx_data = ~Byte;
- stx_count = 10;
-
- return Byte;
-}
-
-uint8_t SoftUART_IsReceived(void)
-{
- return srx_done;
-}
-
-uint8_t SoftUART_RxByte(void)
-{
- while (!(srx_done));
-
- srx_done = 0;
-
- return srx_data;
-}
-
-void SoftUART_Init(void)
-{
- OCR2B = TCNT2 + 1; // force first compare
- TCCR2A = (1 << COM2B1) | (1 << COM2B0); // T1 mode 0
- TCCR2B = (1 << FOC2B) | (1 << CS21); // CLK/8, T1 mode 0
- TIMSK2 = (1 << OCIE2B); // enable tx and wait for start
- EICRA = (1 << ISC01); // -ve edge
- EIMSK = (1 << INT0); // enable INT0 interrupt
-
- stx_count = 0; // nothing to send
- srx_done = 0; // nothing received
- STXPORT |= 1 << STX; // TX output
- STXDDR |= 1 << STX; // TX output
- SRXPORT |= (1 << SRX); // pullup on INT0
-}
-
-/* ISR to detect the start of a bit being sent from the transmitter. */
-ISR(INT0_vect)
-{
- OCR2A = TCNT2 + (BIT_TIME / 8 * 3 / 2); // scan 1.5 bits after start
-
- srx_tmp = 0; // clear bit storage
- srx_mask = 1; // bit mask
-
- TIFR2 = (1 << OCF2A); // clear pending interrupt
-
- if (!(SRXPIN & (1 << SRX))) // still low
- {
- TIMSK2 = (1 << OCIE2A) | (1 << OCIE2B); // wait for first bit
- EIMSK &= ~(1 << INT0);
- }
-}
-
-/* ISR to manage the reception of bits to the transmitter. */
-ISR(TIMER2_COMPA_vect)
-{
- if (srx_mask)
- {
- if (SRXPIN & (1 << SRX))
- srx_tmp |= srx_mask;
-
- srx_mask <<= 1;
-
- OCR2A += BIT_TIME / 8; // next bit slice
- }
- else
- {
- srx_done = 1; // mark rx data valid
- srx_data = srx_tmp; // store rx data
- TIMSK2 = (1 << OCIE2B); // enable tx and wait for start
- EIMSK |= (1 << INT0); // enable START irq
- EIFR = (1 << INTF0); // clear any pending
- }
-}
-
-/* ISR to manage the transmission of bits to the receiver. */
-ISR(TIMER2_COMPB_vect)
-{
- OCR2B += BIT_TIME / 8; // next bit slice
-
- if (stx_count)
- {
- if (--stx_count != 9) // no start bit
- {
- if (!(stx_data & 1)) // test inverted data
- TCCR2A = (1 << COM2B1) | (1 << COM2B0);
- else
- TCCR2A = (1 << COM2B1);
-
- stx_data >>= 1; // shift zero in from left
- }
- else
- {
- TCCR2A = (1 << COM2B1); // START bit
- }
- }
-}
+/* + LUFA Library + Copyright (C) Dean Camera, 2010. + + dean [at] fourwalledcubicle [dot] com + www.fourwalledcubicle.com +*/ + +/* + Copyright 2010 David Prentice (david.prentice [at] farming [dot] uk) + Copyright 2010 Peter Danneger + Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com) + + Permission to use, copy, modify, distribute, and sell this + software and its documentation for any purpose is hereby granted + without fee, 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. +*/ + +#include "SoftUART.h" + +volatile uint8_t srx_done, stx_count; +volatile uint8_t srx_data, srx_mask, srx_tmp, stx_data; + +uint8_t SoftUART_IsReady(void) +{ + return !(stx_count); +} + +uint8_t SoftUART_TxByte(uint8_t Byte) +{ + while (stx_count); + + stx_data = ~Byte; + stx_count = 10; + + return Byte; +} + +uint8_t SoftUART_IsReceived(void) +{ + return srx_done; +} + +uint8_t SoftUART_RxByte(void) +{ + while (!(srx_done)); + + srx_done = 0; + + return srx_data; +} + +void SoftUART_Init(void) +{ + OCR2B = TCNT2 + 1; // force first compare + TCCR2A = (1 << COM2B1) | (1 << COM2B0); // T1 mode 0 + TCCR2B = (1 << FOC2B) | (1 << CS21); // CLK/8, T1 mode 0 + TIMSK2 = (1 << OCIE2B); // enable tx and wait for start + EICRA = (1 << ISC01); // -ve edge + EIMSK = (1 << INT0); // enable INT0 interrupt + + stx_count = 0; // nothing to send + srx_done = 0; // nothing received + STXPORT |= 1 << STX; // TX output + STXDDR |= 1 << STX; // TX output + SRXPORT |= (1 << SRX); // pullup on INT0 +} + +/* ISR to detect the start of a bit being sent from the transmitter. */ +ISR(INT0_vect) +{ + OCR2A = TCNT2 + (BIT_TIME / 8 * 3 / 2); // scan 1.5 bits after start + + srx_tmp = 0; // clear bit storage + srx_mask = 1; // bit mask + + TIFR2 = (1 << OCF2A); // clear pending interrupt + + if (!(SRXPIN & (1 << SRX))) // still low + { + TIMSK2 = (1 << OCIE2A) | (1 << OCIE2B); // wait for first bit + EIMSK &= ~(1 << INT0); + } +} + +/* ISR to manage the reception of bits to the transmitter. */ +ISR(TIMER2_COMPA_vect) +{ + if (srx_mask) + { + if (SRXPIN & (1 << SRX)) + srx_tmp |= srx_mask; + + srx_mask <<= 1; + + OCR2A += BIT_TIME / 8; // next bit slice + } + else + { + srx_done = 1; // mark rx data valid + srx_data = srx_tmp; // store rx data + TIMSK2 = (1 << OCIE2B); // enable tx and wait for start + EIMSK |= (1 << INT0); // enable START irq + EIFR = (1 << INTF0); // clear any pending + } +} + +/* ISR to manage the transmission of bits to the receiver. */ +ISR(TIMER2_COMPB_vect) +{ + OCR2B += BIT_TIME / 8; // next bit slice + + if (stx_count) + { + if (--stx_count != 9) // no start bit + { + if (!(stx_data & 1)) // test inverted data + TCCR2A = (1 << COM2B1) | (1 << COM2B0); + else + TCCR2A = (1 << COM2B1); + + stx_data >>= 1; // shift zero in from left + } + else + { + TCCR2A = (1 << COM2B1); // START bit + } + } +} diff --git a/Projects/XPLAINBridge/Lib/SoftUART.h b/Projects/XPLAINBridge/Lib/SoftUART.h index d6b24320f..07187c24a 100644 --- a/Projects/XPLAINBridge/Lib/SoftUART.h +++ b/Projects/XPLAINBridge/Lib/SoftUART.h @@ -1,60 +1,60 @@ -/*
- LUFA Library
- Copyright (C) Dean Camera, 2010.
-
- dean [at] fourwalledcubicle [dot] com
- www.fourwalledcubicle.com
-*/
-
-/*
- Copyright 2010 David Prentice (david.prentice [at] farming [dot] uk)
- Copyright 2010 Peter Danneger
- Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
-
- Permission to use, copy, modify, distribute, and sell this
- software and its documentation for any purpose is hereby granted
- without fee, 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.
-*/
-
-#ifndef _SOFT_UART_
-#define _SOFT_UART_
-
- /* Includes: */
- #include <avr/io.h>
- #include <avr/interrupt.h>
- #include "SoftUART.h"
-
- /* Macros: */
- #define BAUD 9600
- #define BIT_TIME (uint16_t)((F_CPU + (BAUD / 2)) / BAUD)
-
- #define SRX PD0
- #define SRXPIN PIND
- #define SRXPORT PORTD
-
- #define STX PD1
- #define STXPORT PORTD
- #define STXDDR DDRD
-
- /* Function Prototypes: */
- uint8_t SoftUART_IsReady(void);
- uint8_t SoftUART_TxByte(uint8_t c);
- uint8_t SoftUART_IsReceived(void);
- uint8_t SoftUART_RxByte(void);
- void SoftUART_Init(void);
-
+/* + LUFA Library + Copyright (C) Dean Camera, 2010. + + dean [at] fourwalledcubicle [dot] com + www.fourwalledcubicle.com +*/ + +/* + Copyright 2010 David Prentice (david.prentice [at] farming [dot] uk) + Copyright 2010 Peter Danneger + Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com) + + Permission to use, copy, modify, distribute, and sell this + software and its documentation for any purpose is hereby granted + without fee, 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. +*/ + +#ifndef _SOFT_UART_ +#define _SOFT_UART_ + + /* Includes: */ + #include <avr/io.h> + #include <avr/interrupt.h> + #include "SoftUART.h" + + /* Macros: */ + #define BAUD 9600 + #define BIT_TIME (uint16_t)((F_CPU + (BAUD / 2)) / BAUD) + + #define SRX PD0 + #define SRXPIN PIND + #define SRXPORT PORTD + + #define STX PD1 + #define STXPORT PORTD + #define STXDDR DDRD + + /* Function Prototypes: */ + uint8_t SoftUART_IsReady(void); + uint8_t SoftUART_TxByte(uint8_t c); + uint8_t SoftUART_IsReceived(void); + uint8_t SoftUART_RxByte(void); + void SoftUART_Init(void); + #endif
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