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 /LUFA/Drivers/Peripheral/SPI.h | |
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 'LUFA/Drivers/Peripheral/SPI.h')
-rw-r--r-- | LUFA/Drivers/Peripheral/SPI.h | 370 |
1 files changed, 185 insertions, 185 deletions
diff --git a/LUFA/Drivers/Peripheral/SPI.h b/LUFA/Drivers/Peripheral/SPI.h index 041c0788e..9e6475351 100644 --- a/LUFA/Drivers/Peripheral/SPI.h +++ b/LUFA/Drivers/Peripheral/SPI.h @@ -1,185 +1,185 @@ -/*
- 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.
-*/
-
-/** \file
- * \brief Master include file for the SPI peripheral driver.
- *
- * Hardware SPI subsystem driver for the supported USB AVRs models.
- */
-
-/** \ingroup Group_PeripheralDrivers
- * @defgroup Group_SPI SPI Driver - LUFA/Drivers/Peripheral/SPI.h
- *
- * \section Sec_Dependencies Module Source Dependencies
- * The following files must be built with any user project that uses this module:
- * - None
- *
- * \section Module Description
- * Driver for the hardware SPI port available on most AVR models. This module provides
- * an easy to use driver for the setup of and transfer of data over the AVR's SPI port.
- *
- * @{
- */
-
-#ifndef __SPI_H__
-#define __SPI_H__
-
- /* Includes: */
- #include <stdbool.h>
-
- /* Enable C linkage for C++ Compilers: */
- #if defined(__cplusplus)
- extern "C" {
- #endif
-
- /* Private Interface - For use in library only: */
- #if !defined(__DOXYGEN__)
- /* Macros: */
- #define SPI_USE_DOUBLESPEED (1 << SPE)
- #endif
-
- /* Public Interface - May be used in end-application: */
- /* Macros: */
- /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 2. */
- #define SPI_SPEED_FCPU_DIV_2 SPI_USE_DOUBLESPEED
-
- /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 4. */
- #define SPI_SPEED_FCPU_DIV_4 0
-
- /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 8. */
- #define SPI_SPEED_FCPU_DIV_8 (SPI_USE_DOUBLESPEED | (1 << SPR0))
-
- /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 16. */
- #define SPI_SPEED_FCPU_DIV_16 (1 << SPR0)
-
- /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 32. */
- #define SPI_SPEED_FCPU_DIV_32 (SPI_USE_DOUBLESPEED | (1 << SPR1))
-
- /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 64. */
- #define SPI_SPEED_FCPU_DIV_64 (SPI_USE_DOUBLESPEED | (1 << SPR1) | (1 << SPR0))
-
- /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 128. */
- #define SPI_SPEED_FCPU_DIV_128 ((1 << SPR1) | (1 << SPR0))
-
- /** SPI clock polarity mask for SPI_Init(). Indicates that the SCK should lead on the rising edge. */
- #define SPI_SCK_LEAD_RISING (0 << CPOL)
-
- /** SPI clock polarity mask for SPI_Init(). Indicates that the SCK should lead on the falling edge. */
- #define SPI_SCK_LEAD_FALLING (1 << CPOL)
-
- /** SPI data sample mode mask for SPI_Init(). Indicates that the data should sampled on the leading edge. */
- #define SPI_SAMPLE_LEADING (0 << CPHA)
-
- /** SPI data sample mode mask for SPI_Init(). Indicates that the data should be sampled on the trailing edge. */
- #define SPI_SAMPLE_TRAILING (1 << CPHA)
-
- /** SPI mode mask for SPI_Init(). Indicates that the SPI interface should be initialized into slave mode. */
- #define SPI_MODE_SLAVE (0 << MSTR)
-
- /** SPI mode mask for SPI_Init(). Indicates that the SPI interface should be initialized into master mode. */
- #define SPI_MODE_MASTER (1 << MSTR)
-
- /* Inline Functions: */
- /** Initializes the SPI subsystem, ready for transfers. Must be called before calling any other
- * SPI routines.
- *
- * \param[in] SPIOptions SPI Options, a mask consisting of one of each of the SPI_SPEED_*,
- * SPI_SCK_*, SPI_SAMPLE_* and SPI_MODE_* masks
- */
- static inline void SPI_Init(const uint8_t SPIOptions)
- {
- DDRB |= ((1 << 1) | (1 << 2));
- PORTB |= ((1 << 0) | (1 << 3));
-
- SPCR = ((1 << SPE) | SPIOptions);
-
- if (SPIOptions & SPI_USE_DOUBLESPEED)
- SPSR |= (1 << SPI2X);
- else
- SPSR &= ~(1 << SPI2X);
- }
-
- /** Turns off the SPI driver, disabling and returning used hardware to their default configuration. */
- static inline void SPI_ShutDown(void)
- {
- DDRB &= ~((1 << 1) | (1 << 2));
- PORTB &= ~((1 << 0) | (1 << 3));
-
- SPCR = 0;
- SPSR = 0;
- }
-
- /** Sends and receives a byte through the SPI interface, blocking until the transfer is complete.
- *
- * \param[in] Byte Byte to send through the SPI interface
- *
- * \return Response byte from the attached SPI device
- */
- static inline uint8_t SPI_TransferByte(const uint8_t Byte) ATTR_ALWAYS_INLINE;
- static inline uint8_t SPI_TransferByte(const uint8_t Byte)
- {
- SPDR = Byte;
- while (!(SPSR & (1 << SPIF)));
- return SPDR;
- }
-
- /** Sends a byte through the SPI interface, blocking until the transfer is complete. The response
- * byte sent to from the attached SPI device is ignored.
- *
- * \param[in] Byte Byte to send through the SPI interface
- */
- static inline void SPI_SendByte(const uint8_t Byte) ATTR_ALWAYS_INLINE;
- static inline void SPI_SendByte(const uint8_t Byte)
- {
- SPDR = Byte;
- while (!(SPSR & (1 << SPIF)));
- }
-
- /** Sends a dummy byte through the SPI interface, blocking until the transfer is complete. The response
- * byte from the attached SPI device is returned.
- *
- * \return The response byte from the attached SPI device
- */
- static inline uint8_t SPI_ReceiveByte(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
- static inline uint8_t SPI_ReceiveByte(void)
- {
- SPDR = 0x00;
- while (!(SPSR & (1 << SPIF)));
- return SPDR;
- }
-
- /* Disable C linkage for C++ Compilers: */
- #if defined(__cplusplus)
- }
- #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. +*/ + +/** \file + * \brief Master include file for the SPI peripheral driver. + * + * Hardware SPI subsystem driver for the supported USB AVRs models. + */ + +/** \ingroup Group_PeripheralDrivers + * @defgroup Group_SPI SPI Driver - LUFA/Drivers/Peripheral/SPI.h + * + * \section Sec_Dependencies Module Source Dependencies + * The following files must be built with any user project that uses this module: + * - None + * + * \section Module Description + * Driver for the hardware SPI port available on most AVR models. This module provides + * an easy to use driver for the setup of and transfer of data over the AVR's SPI port. + * + * @{ + */ + +#ifndef __SPI_H__ +#define __SPI_H__ + + /* Includes: */ + #include <stdbool.h> + + /* Enable C linkage for C++ Compilers: */ + #if defined(__cplusplus) + extern "C" { + #endif + + /* Private Interface - For use in library only: */ + #if !defined(__DOXYGEN__) + /* Macros: */ + #define SPI_USE_DOUBLESPEED (1 << SPE) + #endif + + /* Public Interface - May be used in end-application: */ + /* Macros: */ + /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 2. */ + #define SPI_SPEED_FCPU_DIV_2 SPI_USE_DOUBLESPEED + + /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 4. */ + #define SPI_SPEED_FCPU_DIV_4 0 + + /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 8. */ + #define SPI_SPEED_FCPU_DIV_8 (SPI_USE_DOUBLESPEED | (1 << SPR0)) + + /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 16. */ + #define SPI_SPEED_FCPU_DIV_16 (1 << SPR0) + + /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 32. */ + #define SPI_SPEED_FCPU_DIV_32 (SPI_USE_DOUBLESPEED | (1 << SPR1)) + + /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 64. */ + #define SPI_SPEED_FCPU_DIV_64 (SPI_USE_DOUBLESPEED | (1 << SPR1) | (1 << SPR0)) + + /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 128. */ + #define SPI_SPEED_FCPU_DIV_128 ((1 << SPR1) | (1 << SPR0)) + + /** SPI clock polarity mask for SPI_Init(). Indicates that the SCK should lead on the rising edge. */ + #define SPI_SCK_LEAD_RISING (0 << CPOL) + + /** SPI clock polarity mask for SPI_Init(). Indicates that the SCK should lead on the falling edge. */ + #define SPI_SCK_LEAD_FALLING (1 << CPOL) + + /** SPI data sample mode mask for SPI_Init(). Indicates that the data should sampled on the leading edge. */ + #define SPI_SAMPLE_LEADING (0 << CPHA) + + /** SPI data sample mode mask for SPI_Init(). Indicates that the data should be sampled on the trailing edge. */ + #define SPI_SAMPLE_TRAILING (1 << CPHA) + + /** SPI mode mask for SPI_Init(). Indicates that the SPI interface should be initialized into slave mode. */ + #define SPI_MODE_SLAVE (0 << MSTR) + + /** SPI mode mask for SPI_Init(). Indicates that the SPI interface should be initialized into master mode. */ + #define SPI_MODE_MASTER (1 << MSTR) + + /* Inline Functions: */ + /** Initializes the SPI subsystem, ready for transfers. Must be called before calling any other + * SPI routines. + * + * \param[in] SPIOptions SPI Options, a mask consisting of one of each of the SPI_SPEED_*, + * SPI_SCK_*, SPI_SAMPLE_* and SPI_MODE_* masks + */ + static inline void SPI_Init(const uint8_t SPIOptions) + { + DDRB |= ((1 << 1) | (1 << 2)); + PORTB |= ((1 << 0) | (1 << 3)); + + SPCR = ((1 << SPE) | SPIOptions); + + if (SPIOptions & SPI_USE_DOUBLESPEED) + SPSR |= (1 << SPI2X); + else + SPSR &= ~(1 << SPI2X); + } + + /** Turns off the SPI driver, disabling and returning used hardware to their default configuration. */ + static inline void SPI_ShutDown(void) + { + DDRB &= ~((1 << 1) | (1 << 2)); + PORTB &= ~((1 << 0) | (1 << 3)); + + SPCR = 0; + SPSR = 0; + } + + /** Sends and receives a byte through the SPI interface, blocking until the transfer is complete. + * + * \param[in] Byte Byte to send through the SPI interface + * + * \return Response byte from the attached SPI device + */ + static inline uint8_t SPI_TransferByte(const uint8_t Byte) ATTR_ALWAYS_INLINE; + static inline uint8_t SPI_TransferByte(const uint8_t Byte) + { + SPDR = Byte; + while (!(SPSR & (1 << SPIF))); + return SPDR; + } + + /** Sends a byte through the SPI interface, blocking until the transfer is complete. The response + * byte sent to from the attached SPI device is ignored. + * + * \param[in] Byte Byte to send through the SPI interface + */ + static inline void SPI_SendByte(const uint8_t Byte) ATTR_ALWAYS_INLINE; + static inline void SPI_SendByte(const uint8_t Byte) + { + SPDR = Byte; + while (!(SPSR & (1 << SPIF))); + } + + /** Sends a dummy byte through the SPI interface, blocking until the transfer is complete. The response + * byte from the attached SPI device is returned. + * + * \return The response byte from the attached SPI device + */ + static inline uint8_t SPI_ReceiveByte(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT; + static inline uint8_t SPI_ReceiveByte(void) + { + SPDR = 0x00; + while (!(SPSR & (1 << SPIF))); + return SPDR; + } + + /* Disable C linkage for C++ Compilers: */ + #if defined(__cplusplus) + } + #endif + +#endif + +/** @} */ |