--- /dev/null
+/*\r
+ LUFA Library\r
+ Copyright (C) Dean Camera, 2010.\r
+ \r
+ dean [at] fourwalledcubicle [dot] com\r
+ www.fourwalledcubicle.com\r
+*/\r
+\r
+/*\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
+ without fee, provided that the above copyright notice appear in \r
+ all copies and that both that the copyright notice and this\r
+ permission notice and warranty disclaimer appear in supporting \r
+ documentation, and that the name of the author not be used in \r
+ advertising or publicity pertaining to distribution of the \r
+ software without specific, written prior permission.\r
+\r
+ The author disclaim all warranties with regard to this\r
+ software, including all implied warranties of merchantability\r
+ and fitness. In no event shall the author be liable for any\r
+ special, indirect or consequential damages or any damages\r
+ whatsoever resulting from loss of use, data or profits, whether\r
+ in an action of contract, negligence or other tortious action,\r
+ arising out of or in connection with the use or performance of\r
+ this software.\r
+*/\r
+\r
+/** \file\r
+ *\r
+ * SPI driver for the 32-bit AVRs.\r
+ *\r
+ * \note This file should not be included directly. It is automatically included as needed by the SPI driver\r
+ * dispatch header located in LUFA/Drivers/Peripheral/SPI.h.\r
+ */\r
+ \r
+/** \ingroup Group_SPI\r
+ * @defgroup Group_SPI_AVR32 32-Bit AVR SPI Driver\r
+ *\r
+ * SPI driver for the 32-bit AVRs.\r
+ *\r
+ * \note This file should not be included directly. It is automatically included as needed by the ADC driver\r
+ * dispatch header located in LUFA/Drivers/Peripheral/SPI.h.\r
+ *\r
+ * @{\r
+ */\r
+\r
+#ifndef __SPI_AVR32_H__\r
+#define __SPI_AVR32_H__\r
+\r
+ /* Includes: */\r
+ #include <stdbool.h>\r
+\r
+ /* Preprocessor Checks: */\r
+ #if !defined(__INCLUDE_FROM_SPI_H)\r
+ #error Do not include this file directly. Include LUFA/Drivers/Peripheral/SPI.h instead.\r
+ #endif\r
+\r
+ /* Enable C linkage for C++ Compilers: */\r
+ #if defined(__cplusplus)\r
+ extern "C" {\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 1. */\r
+ #define SPI_SPEED_FCPU_DIV_1 0\r
+\r
+ /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 32. */\r
+ #define SPI_SPEED_FCPU_DIV_32 AVR32_SPI_MR_FDIV_MASK\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\r
+\r
+ /** SPI mode mask for SPI_Init(). Indicates that the SPI interface should be initialized into master mode. */\r
+ #define SPI_MODE_MASTER AVR32_SPI_MR_MSTR_MASK\r
+\r
+ /* Inline Functions: */\r
+ /** Initialises 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
+ * and SPI_MODE_* masks\r
+ */\r
+ static inline void SPI_Init(const uint8_t SPIOptions)\r
+ {\r
+ AVR32_SPI.cr = AVR32_SPI_CR_SPIEN_MASK | AVR32_SPI_CR_SWRST_MASK;\r
+ AVR32_SPI.mr = SPIOptions;\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
+ AVR32_SPI.cr = AVR32_SPI_CR_SPIDIS_MASK;\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
+ AVR32_SPI.tdr = Byte;\r
+ // TODO: Wait for receive\r
+ return AVR32_SPI.rdr;\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
+ AVR32_SPI.tdr = Byte;\r
+ // TODO: Wait for receive \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
+ AVR32_SPI.tdr = 0x00;\r
+ // TODO: Wait for receive \r
+ return AVR32_SPI.rdr;\r
+ }\r
+\r
+ /* Disable C linkage for C++ Compilers: */\r
+ #if defined(__cplusplus)\r
+ }\r
+ #endif\r
+ \r
+#endif\r
+\r
+/** @} */\r
projects / pub / lufa.git / blobdiff