X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/d4ca7fb44c7d326b96cf391f0275dc323dbe24de..0da99447d3e88e83f9977501bee56af5c7aa56c0:/LUFA/Drivers/Peripheral/SPI.h diff --git a/LUFA/Drivers/Peripheral/SPI.h b/LUFA/Drivers/Peripheral/SPI.h index f7031692a..73019941e 100644 --- a/LUFA/Drivers/Peripheral/SPI.h +++ b/LUFA/Drivers/Peripheral/SPI.h @@ -1,184 +1,76 @@ -/* - LUFA Library - Copyright (C) Dean Camera, 2009. - - dean [at] fourwalledcubicle [dot] com - www.fourwalledcubicle.com -*/ - -/* - Copyright 2009 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 - * - * 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 - - /* 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, 2012. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2012 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 Hardware Serial Peripheral Interface driver. + * + * This file is the master dispatch header file for the device-specific SPI driver, for microcontrollers + * containing a hardware SPI. + * + * User code should include this file, which will in turn include the correct SPI driver header file for the + * currently selected architecture and microcontroller model. + */ + +/** \ingroup Group_PeripheralDrivers + * \defgroup Group_SPI SPI Driver - LUFA/Drivers/Peripheral/SPI.h + * \brief Hardware Serial Peripheral Interface driver. + * + * \section Sec_Dependencies Module Source Dependencies + * The following files must be built with any user project that uses this module: + * - None + * + * \section Sec_ModDescription Module Description + * Hardware SPI driver. This module provides an easy to use driver for the setup and transfer of data over + * the selected architecture and microcontroller model's SPI port. + * + * \note The exact API for this driver may vary depending on the target used - see + * individual target module documentation for the API specific to your target processor. + */ + +#ifndef __SPI_H__ +#define __SPI_H__ + + /* Macros: */ + #define __INCLUDE_FROM_SPI_H + + /* Includes: */ + #include "../../Common/Common.h" + + /* Includes: */ + #if (ARCH == ARCH_AVR8) + #include "AVR8/SPI_AVR8.h" + #elif (ARCH == ARCH_XMEGA) + #include "XMEGA/SPI_XMEGA.h" + #else + #error The SPI peripheral driver is not currently available for your selected architecture. + #endif + +#endif +