X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/1e8df8951a3335e4b45ad0c25a82df3d90d785f3..d2ed97e34b42aff851fa8ba39c43b6cb9e4f6448:/LUFA/Drivers/Peripheral/SPI.h diff --git a/LUFA/Drivers/Peripheral/SPI.h b/LUFA/Drivers/Peripheral/SPI.h index df741d7b8..aac3d9556 100644 --- a/LUFA/Drivers/Peripheral/SPI.h +++ b/LUFA/Drivers/Peripheral/SPI.h @@ -1,21 +1,21 @@ /* LUFA Library - Copyright (C) Dean Camera, 2009. + Copyright (C) Dean Camera, 2010. dean [at] fourwalledcubicle [dot] com www.fourwalledcubicle.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 + 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 @@ -30,7 +30,10 @@ /** \file * - * Hardware SPI subsystem driver for the supported USB AVRs models. + * This file is the master dispatch header file for the device-specific SPI driver, for AVRs containing a SPI. + * + * User code should include this file, which will in turn include the correct SPI driver header file for the + * currently selected AVR model. */ /** \ingroup Group_PeripheralDrivers @@ -41,7 +44,7 @@ * - None * * \section Module Description - * Driver for the hardware SPI port avaliable on most AVR models. This module provides + * 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. * * @{ @@ -50,116 +53,16 @@ #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: */ + /* Macros: */ #if !defined(__DOXYGEN__) - /* Macros: */ - #define SPI_USE_DOUBLESPEED (1 << 7) + #define __INCLUDE_FROM_SPI_H #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)) - - /* Inline Functions: */ - /** Initializes the SPI subsystem, ready for transfers. Must be called before calling any other - * SPI routines. - * - * \param[in] PrescalerMask Prescaler mask to set the SPI clock speed - * \param[in] Master If true, sets the SPI system to use master mode, slave if false - */ - static inline void SPI_Init(const uint8_t PrescalerMask, const bool Master) - { - DDRB |= ((1 << 1) | (1 << 2)); - PORTB |= ((1 << 0) | (1 << 3)); - - SPCR = ((1 << SPE) | (Master << MSTR) | (1 << CPOL) | (1 << CPHA) | - (PrescalerMask & ~SPI_USE_DOUBLESPEED)); - - if (PrescalerMask & 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) - } + /* Includes: */ + #if defined(__AVR32__) + #include "AVR32/SPI.h" + #else + #include "AVR8/SPI.h" #endif #endif