/*\r
LUFA Library\r
- Copyright (C) Dean Camera, 2009.\r
+ Copyright (C) Dean Camera, 2010.\r
\r
dean [at] fourwalledcubicle [dot] com\r
www.fourwalledcubicle.com\r
*/\r
\r
/*\r
- Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
+ Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
\r
Permission to use, copy, modify, distribute, and sell this \r
software and its documentation for any purpose is hereby granted\r
\r
/** \file\r
*\r
- * Hardware SPI subsystem driver for the supported USB AVRs models.\r
+ * This file is the master dispatch header file for the device-specific SPI driver, for AVRs containing a SPI.\r
+ *\r
+ * User code should include this file, which will in turn include the correct SPI driver header file for the\r
+ * currently selected AVR model.\r
*/\r
\r
/** \ingroup Group_PeripheralDrivers\r
#ifndef __SPI_H__\r
#define __SPI_H__\r
\r
- /* Includes: */\r
- #include <stdbool.h>\r
-\r
- /* Enable C linkage for C++ Compilers: */\r
- #if defined(__cplusplus)\r
- extern "C" {\r
- #endif\r
-\r
- /* Private Interface - For use in library only: */\r
+ /* Macros: */\r
#if !defined(__DOXYGEN__)\r
- /* Macros: */\r
- #define SPI_USE_DOUBLESPEED (1 << SPE)\r
+ #define __INCLUDE_FROM_SPI_H\r
#endif\r
- \r
- /* Public Interface - May be used in end-application: */\r
- /* Macros: */\r
- /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 2. */\r
- #define SPI_SPEED_FCPU_DIV_2 SPI_USE_DOUBLESPEED\r
-\r
- /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 4. */\r
- #define SPI_SPEED_FCPU_DIV_4 0\r
-\r
- /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 8. */\r
- #define SPI_SPEED_FCPU_DIV_8 (SPI_USE_DOUBLESPEED | (1 << SPR0))\r
-\r
- /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 16. */\r
- #define SPI_SPEED_FCPU_DIV_16 (1 << SPR0)\r
-\r
- /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 32. */\r
- #define SPI_SPEED_FCPU_DIV_32 (SPI_USE_DOUBLESPEED | (1 << SPR1))\r
-\r
- /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 64. */\r
- #define SPI_SPEED_FCPU_DIV_64 (SPI_USE_DOUBLESPEED | (1 << SPR1) | (1 << SPR0))\r
\r
- /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 128. */\r
- #define SPI_SPEED_FCPU_DIV_128 ((1 << SPR1) | (1 << SPR0))\r
- \r
- /** SPI clock polarity mask for SPI_Init(). Indicates that the SCK should lead on the rising edge. */\r
- #define SPI_SCK_LEAD_RISING (0 << CPOL)\r
-\r
- /** SPI clock polarity mask for SPI_Init(). Indicates that the SCK should lead on the falling edge. */\r
- #define SPI_SCK_LEAD_FALLING (1 << CPOL)\r
-\r
- /** SPI data sample mode mask for SPI_Init(). Indicates that the data should sampled on the leading edge. */\r
- #define SPI_SAMPLE_LEADING (0 << CPHA)\r
-\r
- /** SPI data sample mode mask for SPI_Init(). Indicates that the data should be sampled on the trailing edge. */\r
- #define SPI_SAMPLE_TRAILING (1 << CPHA)\r
- \r
- /** SPI mode mask for SPI_Init(). Indicates that the SPI interface should be initialized into slave mode. */\r
- #define SPI_MODE_SLAVE (0 << MSTR)\r
-\r
- /** SPI mode mask for SPI_Init(). Indicates that the SPI interface should be initialized into master mode. */\r
- #define SPI_MODE_MASTER (1 << MSTR)\r
-\r
- /* Inline Functions: */\r
- /** Initializes the SPI subsystem, ready for transfers. Must be called before calling any other\r
- * SPI routines.\r
- *\r
- * \param[in] SPIOptions SPI Options, a mask consisting of one of each of the SPI_SPEED_*,\r
- * SPI_SCK_*, SPI_SAMPLE_* and SPI_MODE_* masks\r
- */\r
- static inline void SPI_Init(const uint8_t SPIOptions)\r
- {\r
- DDRB |= ((1 << 1) | (1 << 2));\r
- PORTB |= ((1 << 0) | (1 << 3));\r
- \r
- SPCR = ((1 << SPE) | SPIOptions);\r
- \r
- if (SPIOptions & SPI_USE_DOUBLESPEED)\r
- SPSR |= (1 << SPI2X);\r
- else\r
- SPSR &= ~(1 << SPI2X);\r
- }\r
- \r
- /** Turns off the SPI driver, disabling and returning used hardware to their default configuration. */\r
- static inline void SPI_ShutDown(void)\r
- {\r
- DDRB &= ~((1 << 1) | (1 << 2));\r
- PORTB &= ~((1 << 0) | (1 << 3));\r
- \r
- SPCR = 0;\r
- SPSR = 0;\r
- }\r
- \r
- /** Sends and receives a byte through the SPI interface, blocking until the transfer is complete.\r
- *\r
- * \param[in] Byte Byte to send through the SPI interface\r
- *\r
- * \return Response byte from the attached SPI device\r
- */\r
- static inline uint8_t SPI_TransferByte(const uint8_t Byte) ATTR_ALWAYS_INLINE;\r
- static inline uint8_t SPI_TransferByte(const uint8_t Byte)\r
- {\r
- SPDR = Byte;\r
- while (!(SPSR & (1 << SPIF)));\r
- return SPDR;\r
- }\r
-\r
- /** Sends a byte through the SPI interface, blocking until the transfer is complete. The response\r
- * byte sent to from the attached SPI device is ignored.\r
- *\r
- * \param[in] Byte Byte to send through the SPI interface\r
- */\r
- static inline void SPI_SendByte(const uint8_t Byte) ATTR_ALWAYS_INLINE;\r
- static inline void SPI_SendByte(const uint8_t Byte)\r
- {\r
- SPDR = Byte;\r
- while (!(SPSR & (1 << SPIF)));\r
- }\r
-\r
- /** Sends a dummy byte through the SPI interface, blocking until the transfer is complete. The response\r
- * byte from the attached SPI device is returned.\r
- *\r
- * \return The response byte from the attached SPI device\r
- */\r
- static inline uint8_t SPI_ReceiveByte(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;\r
- static inline uint8_t SPI_ReceiveByte(void)\r
- {\r
- SPDR = 0x00;\r
- while (!(SPSR & (1 << SPIF)));\r
- return SPDR;\r
- }\r
-\r
- /* Disable C linkage for C++ Compilers: */\r
- #if defined(__cplusplus)\r
- }\r
+ /* Includes: */\r
+ #if defined(__AVR32__)\r
+ #include "AVR32/SPI.h"\r
+ #else\r
+ #include "AVR8/SPI.h" \r
#endif\r
\r
#endif\r
projects / pub / USBasp.git / blobdiff