/** \file
* \brief Master include file for the SPI peripheral driver.
*
- * 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 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
+ * \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 Sec_ModDescription 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.
- *
- * \section Sec_ExampleUsage Example Usage
- * The following snippet is an example of how this module may be used within a typical
- * application.
- *
- * \code
- * // Initialise the SPI driver before first use
- * SPI_Init(SPI_SPEED_FCPU_DIV_2 | SPI_ORDER_MSB_FIRST | SPI_SCK_LEAD_FALLING |
- * SPI_SAMPLE_TRAILING | SPI_MODE_MASTER);
- *
- * // Send several bytes, ignoring the returned data
- * SPI_SendByte(0x01);
- * SPI_SendByte(0x02);
- * SPI_SendByte(0x03);
+ * 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.
*
- * // Receive several bytes, sending a dummy 0x00 byte each time
- * uint8_t Byte1 = SPI_ReceiveByte();
- * uint8_t Byte2 = SPI_ReceiveByte();
- * uint8_t Byte3 = SPI_ReceiveByte();
- *
- * // Send a byte, and store the received byte from the same transaction
- * uint8_t ResponseByte = SPI_TransferByte(0xDC);
- * \endcode
- *
- * @{
+ * \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__
- /* Includes: */
- #include <stdbool.h>
-
- /* Enable C linkage for C++ Compilers: */
- #if defined(__cplusplus)
- extern "C" {
+ /* Macros: */
+ #if !defined(__DOXYGEN__)
+ #define __INCLUDE_FROM_SPI_H
#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: */
- /** \name SPI Prescaler Configuration Masks */
- //@{
- /** SPI prescaler mask for \c SPI_Init(). Divides the system clock by a factor of 2. */
- #define SPI_SPEED_FCPU_DIV_2 SPI_USE_DOUBLESPEED
-
- /** SPI prescaler mask for \c SPI_Init(). Divides the system clock by a factor of 4. */
- #define SPI_SPEED_FCPU_DIV_4 0
-
- /** SPI prescaler mask for \c 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 \c SPI_Init(). Divides the system clock by a factor of 16. */
- #define SPI_SPEED_FCPU_DIV_16 (1 << SPR0)
-
- /** SPI prescaler mask for \c 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 \c 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 \c SPI_Init(). Divides the system clock by a factor of 128. */
- #define SPI_SPEED_FCPU_DIV_128 ((1 << SPR1) | (1 << SPR0))
- //@}
-
- /** \name SPI SCK Polarity Configuration Masks */
- //@{
- /** SPI clock polarity mask for \c SPI_Init(). Indicates that the SCK should lead on the rising edge. */
- #define SPI_SCK_LEAD_RISING (0 << CPOL)
-
- /** SPI clock polarity mask for \c SPI_Init(). Indicates that the SCK should lead on the falling edge. */
- #define SPI_SCK_LEAD_FALLING (1 << CPOL)
- //@}
-
- /** \name SPI Sample Edge Configuration Masks */
- //@{
- /** SPI data sample mode mask for \c SPI_Init(). Indicates that the data should sampled on the leading edge. */
- #define SPI_SAMPLE_LEADING (0 << CPHA)
-
- /** SPI data sample mode mask for \c SPI_Init(). Indicates that the data should be sampled on the trailing edge. */
- #define SPI_SAMPLE_TRAILING (1 << CPHA)
- //@}
-
- /** \name SPI Data Ordering Configuration Masks */
- //@{
- /** SPI data order mask for \c SPI_Init(). Indicates that data should be shifted out MSB first. */
- #define SPI_ORDER_MSB_FIRST (0 << DORD)
-
- /** SPI data order mask for \c SPI_Init(). Indicates that data should be shifted out MSB first. */
- #define SPI_ORDER_LSB_FIRST (1 << DORD)
- //@}
-
- /** \name SPI Mode Configuration Masks */
- //@{
- /** SPI mode mask for \c SPI_Init(). Indicates that the SPI interface should be initialized into slave mode. */
- #define SPI_MODE_SLAVE (0 << MSTR)
-
- /** SPI mode mask for \c SPI_Init(). Indicates that the SPI interface should be initialized into master mode. */
- #define SPI_MODE_MASTER (1 << MSTR)
- //@}
-
- /* Inline Functions: */
- /** Initialises 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 \c SPI_SPEED_*,
- * \c SPI_SCK_*, \c SPI_SAMPLE_*, \c SPI_ORDER_* and \c SPI_MODE_* masks.
- */
- static inline void SPI_Init(const uint8_t SPIOptions)
- {
- DDRB |= ((1 << 1) | (1 << 2));
- DDRB &= ~((1 << 0) | (1 << 3));
- 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_Disable(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;
- }
+ /* Includes: */
+ #include "../../Common/Common.h"
- /* Disable C linkage for C++ Compilers: */
- #if defined(__cplusplus)
- }
+ /* Includes: */
+ #if (ARCH == ARCH_AVR8)
+ #include "AVR8/SPI.h"
+ #else
+ #error The SPI peripheral driver is not currently available for your selected architecture.
#endif
#endif
-
-/** @} */
-
projects / pub / USBasp.git / blobdiff