ahoneybun/qmk_firmware
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Moved out each demos' functionality library files (e.g. Ring Buffer library) to /Lib directories for a better directory structure.

Browse source
This commit is contained in:
Dean Camera 2009-05-22 06:17:57 +00:00
parent d0806c817c
commit b7ef7f49c9
52 changed files with 37 additions and 30 deletions
Download patch file Download diff file Expand all files Collapse all files

113
Projects/Magstripe/Lib/CircularBitBuffer.c Normal file
View file

@ -0,0 +1,113 @@
/*
LUFA Library
Copyright (C) Dean Camera, 2009.
dean [at] fourwalledcubicle [dot] com
www.fourwalledcubicle.com
*/
/*
Copyright 2009 Denver Gingerich (denver [at] ossguy [dot] com)
Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] 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.
*/
/** Circular bit buffer library. This will allow for individual bits
* to be stored in packed form inside circular buffers, to reduce
* overall RAM usage.
*/
#include "CircularBitBuffer.h"
/** Function to initialize or reset a bit buffer, ready for data to be stored into it. */
void BitBuffer_Init(BitBuffer_t* Buffer)
{
/* Reset the number of stored bits in the buffer */
Buffer->Elements = 0;
/* Reset the data in and out pointer structures in the buffer to the first buffer bit */
Buffer->In.CurrentByte = Buffer->Data;
Buffer->In.ByteMask = (1 << 0);
Buffer->Out.CurrentByte = Buffer->Data;
Buffer->Out.ByteMask = (1 << 0);
}
/** Function to store the given bit into the given bit buffer. */
void BitBuffer_StoreNextBit(BitBuffer_t* Buffer, bool Bit)
{
/* If the bit to store is true, set the next bit in the buffer */
if (Bit)
*Buffer->In.CurrentByte |= Buffer->In.ByteMask;
/* Increment the number of stored bits in the buffer counter */
Buffer->Elements++;
/* Check if the current buffer byte is full of stored bits */
if (Buffer->In.ByteMask == (1 << 7))
{
/* Check if the end of the buffer has been reached, if so reset to start of buffer, otherwise advance to next bit */
if (Buffer->In.CurrentByte != &Buffer->Data[sizeof(Buffer->Data) - 1])
Buffer->In.CurrentByte++;
else
Buffer->In.CurrentByte = Buffer->Data;
/* Reset the storage bit mask in the current buffer byte to the first bit */
Buffer->In.ByteMask = (1 << 0);
}
else
{
/* Shift the current storage bit mask to the next bit in the current byte */
Buffer->In.ByteMask <<= 1;
}
}
/** Function to retrieve the next bit stored in the given bit buffer. */
bool BitBuffer_GetNextBit(BitBuffer_t* Buffer)
{
/* Retrieve the value of the next bit stored in the buffer */
bool Bit = ((*Buffer->Out.CurrentByte & Buffer->Out.ByteMask) != 0);
/* Clear the buffer bit */
*Buffer->Out.CurrentByte &= ~Buffer->Out.ByteMask;
/* Decrement the number of stored bits in the buffer counter */
Buffer->Elements--;
/* Check if the current buffer byte is empty of stored bits */
if (Buffer->Out.ByteMask == (1 << 7))
{
/* Check if the end of the buffer has been reached, if so reset to start of buffer, otherwise advance to next bit */
if (Buffer->Out.CurrentByte != &Buffer->Data[sizeof(Buffer->Data) - 1])
Buffer->Out.CurrentByte++;
else
Buffer->Out.CurrentByte = Buffer->Data;
/* Reset the retrieval bit mask in the current buffer byte to the first bit */
Buffer->Out.ByteMask = (1 << 0);
}
else
{
/* Shift the current retrieval bit mask to the next bit in the current byte */
Buffer->Out.ByteMask <<= 1;
}
/* Return the retrieved bit from the buffer */
return Bit;
}

95
Projects/Magstripe/Lib/CircularBitBuffer.h Normal file
View file

@ -0,0 +1,95 @@
/*
LUFA Library
Copyright (C) Dean Camera, 2009.
dean [at] fourwalledcubicle [dot] com
www.fourwalledcubicle.com
*/
/*
Copyright 2009 Denver Gingerich (denver [at] ossguy [dot] com)
Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] 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.
*/
/** \file
*
* Header file for CircularBitBuffer.c.
*/
#ifndef _CIRCULARBITBUFFER_H_
#define _CIRCULARBITBUFFER_H_
/* Includes: */
#include <avr/io.h>
#include <stdbool.h>
#include <LUFA/Common/Common.h>
/* Macros: */
#if (defined(__AVR_AT90USB1287__) || defined(__AVR_AT90USB647__) || \
defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB646__)) || defined(__DOXYGEN__)
/** Maximum number of bits which can be stored into a bit buffer. The memory usage is one eighth of this value per buffer. */
#define MAX_BITS 8192
#else
#define MAX_BITS 1024
#endif
/* Type Defines: */
/* Type define for a pointer to a bit in a bit buffer. */
typedef struct
{
uint8_t* CurrentByte; /**< Pointer to the current byte in the buffer */
uint8_t ByteMask; /**< Mask of the current bit in the buffer */
} BitBufferPointer_t;
/** Type define for a circular packet bit buffer. */
typedef struct
{
uint8_t Data[MAX_BITS / 8]; /**< Buffer to hold the stored bits in packed form */
uint16_t Elements; /**< Number of stored bits in the bit buffer */
BitBufferPointer_t In; /**< Bit pointer to the next storage location in the buffer */
BitBufferPointer_t Out; /**< Bit pointer to the next retrieval location in the buffer */
} BitBuffer_t;
/* Function Prototypes: */
/** Initializes or resets a given bit buffer, ready to store new bits.
*
* \param Buffer Bit buffer to initialize
*/
void BitBuffer_Init(BitBuffer_t* Buffer) ATTR_NON_NULL_PTR_ARG(1);
/** Stores a bit into the next location inside a given bit buffer.
*
* \param Buffer Bit buffer to store a bit into
* \param Bit Bit to store into the buffer
*/
void BitBuffer_StoreNextBit(BitBuffer_t* Buffer, bool Bit) ATTR_NON_NULL_PTR_ARG(1);
/** Retrieves a bit from the next location inside a given bit buffer.
*
* \param Buffer Bit buffer to store a bit into
*
* \return Next bit from the buffer
*/
bool BitBuffer_GetNextBit(BitBuffer_t* Buffer) ATTR_NON_NULL_PTR_ARG(1);
#endif

100
Projects/Magstripe/Lib/MagstripeHW.h Normal file
View file

@ -0,0 +1,100 @@
/*
Copyright 2009 Denver Gingerich (denver [at] ossguy [dot] com)
Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] 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.
*/
/*
NOTE: The user of this include file MUST define the following macros
prior to including the file:
MAG_T1_CLOCK_PIN Pin connected to Track 1 clock wire (ie. PORTC1)
MAG_T1_DATA_PIN Pin connected to Track 1 data wire (ie. PORTC2)
MAG_T2_CLOCK_PIN Pin connected to Track 2 clock wire (ie. PORTC3)
MAG_T2_DATA_PIN Pin connected to Track 2 data wire (ie. PORTC0)
MAG_T3_CLOCK_PIN Pin connected to Track 3 clock wire (ie. PORTC5)
MAG_T3_DATA_PIN Pin connected to Track 3 data wire (ie. PORTC6)
MAG_CLS_PIN Pin connected to card loaded wire (ie. PORTC4)
MAG_PIN PIN macro for the reader's port (ie. PINC)
MAG_DDR DDR macro for the reader's port (ie. DDRC)
MAG_PORT PORT macro for the reader's port (ie. PORTC)
The example macros listed above assume that the Track 2 data wire is
connected to pin 0 on port C, the Track 2 clock wire is connected to
pin 3 on port C (similarly for Tracks 1 and 3), and the card loaded
wire is connected to pin 4 on port C.
If the magstripe reader you are using only reads one or two tracks,
then set the clock and data pins for the tracks it doesn't read to a
pin that is unused. For example, on the AT90USBKey, any of the pins on
port C that do not have wires attached will be unused since they are
not connected to any onboard devices (such as the joystick or
temperature sensor).
Connecting wires to pins on different ports (ie. a data wire to pin 0
on port C and a clock wire to pin 0 on port D) is currently
unsupported. All pins specified above must be on the same port.
*/
/** \file
*
* Driver header for a TTL Magnetic Card reader device (such as the Omron V3B-4K).
*/
#ifndef _MAGSTRIPEHW_H_
#define _MAGSTRIPEHW_H_
/* Includes: */
#include <avr/io.h>
#include <LUFA/Common/Common.h>
/* Private Interface - For use in library only: */
/* Macros: */
/** Mask of the track data, clock and card detection pins. */
#define MAG_MASK (MAG_T1_DATA | MAG_T1_CLOCK | \
MAG_T2_DATA | MAG_T2_CLOCK | \
MAG_T3_DATA | MAG_T3_CLOCK | \
MAG_CARDPRESENT)
/* Public Interface - May be used in end-application: */
/* Inline Functions: */
/** Initializes the magnetic stripe card reader ports and pins so that the card reader
* device can be controlled and read by the card reader driver. This must be called before
* trying to read any of the card reader's status lines.
*/
static inline void Magstripe_Init(void)
{
MAG_DDR &= ~MAG_MASK;
MAG_PORT |= MAG_MASK;
};
/** Returns the status of all the magnetic card reader's outputs.
*
* \return A mask indicating which card lines are high or low
*/
static inline uint8_t Magstripe_GetStatus(void) ATTR_WARN_UNUSED_RESULT;
static inline uint8_t Magstripe_GetStatus(void)
{
/* Magstripe IOs are active low and must be inverted when read */
return ((uint8_t)~MAG_PIN & MAG_MASK);
}
#endif