/*
LUFA Library
- Copyright (C) Dean Camera, 2012.
+ Copyright (C) Dean Camera, 2019.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
- Copyright 2012 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+ Copyright 2019 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
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
- The author disclaim all warranties with regard to this
+ The author disclaims 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
/** \ingroup Group_SPI
* \defgroup Group_SPI_XMEGA SPI Peripheral Driver (XMEGA)
*
- * \section Sec_ModDescription Module Description
+ * \section Sec_SPI_XMEGA_ModDescription Module Description
* Driver for the hardware SPI port(s) available on XMEGA AVR microcontroller models. This
* module provides an easy to use driver for the setup and transfer of data over the AVR's
* SPI ports.
* SPI_Init(&SPIC,
* 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(&SPIC, 0x01);
* SPI_SendByte(&SPIC, 0x02);
* SPI_SendByte(&SPIC, 0x03);
- *
+ *
* // Receive several bytes, sending a dummy 0x00 byte each time
* uint8_t Byte1 = SPI_ReceiveByte(&SPIC);
* uint8_t Byte2 = SPI_ReceiveByte(&SPIC);
* uint8_t Byte3 = SPI_ReceiveByte(&SPIC);
- *
+ *
* // Send a byte, and store the received byte from the same transaction
* uint8_t ResponseByte = SPI_TransferByte(&SPIC, 0xDC);
* \endcode
/* Public Interface - May be used in end-application: */
/* Macros: */
/** \name SPI Prescaler Configuration Masks */
- //@{
+ /**@{*/
/** SPI prescaler mask for \ref SPI_Init(). Divides the system clock by a factor of 2. */
#define SPI_SPEED_FCPU_DIV_2 SPI_USE_DOUBLESPEED
/** SPI prescaler mask for \ref SPI_Init(). Divides the system clock by a factor of 128. */
#define SPI_SPEED_FCPU_DIV_128 (3 << SPI_PRESCALER_gp)
- //@}
+ /**@}*/
/** \name SPI SCK Polarity Configuration Masks */
- //@{
+ /**@{*/
/** SPI clock polarity mask for \ref SPI_Init(). Indicates that the SCK should lead on the rising edge. */
#define SPI_SCK_LEAD_RISING 0
/** SPI clock polarity mask for \ref SPI_Init(). Indicates that the SCK should lead on the falling edge. */
#define SPI_SCK_LEAD_FALLING SPI_MODE1_bm
- //@}
+ /**@}*/
/** \name SPI Sample Edge Configuration Masks */
- //@{
+ /**@{*/
/** SPI data sample mode mask for \ref SPI_Init(). Indicates that the data should sampled on the leading edge. */
#define SPI_SAMPLE_LEADING 0
/** SPI data sample mode mask for \ref SPI_Init(). Indicates that the data should be sampled on the trailing edge. */
#define SPI_SAMPLE_TRAILING SPI_MODE0_bm
- //@}
+ /**@}*/
/** \name SPI Data Ordering Configuration Masks */
- //@{
+ /**@{*/
/** SPI data order mask for \ref SPI_Init(). Indicates that data should be shifted out MSB first. */
#define SPI_ORDER_MSB_FIRST 0
/** SPI data order mask for \ref SPI_Init(). Indicates that data should be shifted out LSB first. */
#define SPI_ORDER_LSB_FIRST SPI_DORD_bm
- //@}
+ /**@}*/
/** \name SPI Mode Configuration Masks */
- //@{
+ /**@{*/
/** SPI mode mask for \ref SPI_Init(). Indicates that the SPI interface should be initialized into slave mode. */
#define SPI_MODE_SLAVE 0
/** SPI mode mask for \ref SPI_Init(). Indicates that the SPI interface should be initialized into master mode. */
#define SPI_MODE_MASTER SPI_MASTER_bm
- //@}
+ /**@}*/
/* Inline Functions: */
/** Initializes the SPI subsystem, ready for transfers. Must be called before calling any other
* \c SPI_SCK_*, \c SPI_SAMPLE_*, \c SPI_ORDER_* and \c SPI_MODE_* masks.
*/
static inline void SPI_Init(SPI_t* const SPI,
+ const uint8_t SPIOptions) ATTR_NON_NULL_PTR_ARG(1);
+ static inline void SPI_Init(SPI_t* const SPI,
const uint8_t SPIOptions)
{
SPI->CTRL = (SPIOptions | SPI_ENABLE_bm);
*
* \param[in,out] SPI Pointer to the base of the SPI peripheral within the device.
*/
+ static inline void SPI_Disable(SPI_t* const SPI) ATTR_NON_NULL_PTR_ARG(1);
static inline void SPI_Disable(SPI_t* const SPI)
{
SPI->CTRL &= ~SPI_ENABLE_bm;
*
* \return \ref SPI_MODE_MASTER if the interface is currently in SPI Master mode, \ref SPI_MODE_SLAVE otherwise
*/
- static inline uint8_t SPI_GetCurrentMode(SPI_t* const SPI) ATTR_ALWAYS_INLINE;
+ static inline uint8_t SPI_GetCurrentMode(SPI_t* const SPI) ATTR_ALWAYS_INLINE ATTR_NON_NULL_PTR_ARG(1);
static inline uint8_t SPI_GetCurrentMode(SPI_t* const SPI)
{
return (SPI->CTRL & SPI_MASTER_bm);
* \return Response byte from the attached SPI device.
*/
static inline uint8_t SPI_TransferByte(SPI_t* const SPI,
- const uint8_t Byte) ATTR_ALWAYS_INLINE;
+ const uint8_t Byte) ATTR_ALWAYS_INLINE ATTR_NON_NULL_PTR_ARG(1);
static inline uint8_t SPI_TransferByte(SPI_t* const SPI,
const uint8_t Byte)
{
* \param[in] Byte Byte to send through the SPI interface.
*/
static inline void SPI_SendByte(SPI_t* const SPI,
- const uint8_t Byte) ATTR_ALWAYS_INLINE;
+ const uint8_t Byte) ATTR_ALWAYS_INLINE ATTR_NON_NULL_PTR_ARG(1);
static inline void SPI_SendByte(SPI_t* const SPI,
const uint8_t Byte)
{
*
* \return The response byte from the attached SPI device.
*/
- static inline uint8_t SPI_ReceiveByte(SPI_t* const SPI) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
+ static inline uint8_t SPI_ReceiveByte(SPI_t* const SPI) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1);
static inline uint8_t SPI_ReceiveByte(SPI_t* const SPI)
{
SPI->DATA = 0;
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