/*
LUFA Library
- Copyright (C) Dean Camera, 2013.
+ Copyright (C) Dean Camera, 2021.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
- Copyright 2013 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+ Copyright 2021 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
/** \ingroup Group_SerialSPI
* \defgroup Group_SerialSPI_XMEGA Master SPI Mode Serial USART Peripheral Driver (XMEGA)
*
- * \section Sec_ModDescription Module Description
+ * \section Sec_SerialSPI_XMEGA_ModDescription Module Description
* On-chip serial USART driver for the XMEGA AVR microcontrollers.
*
* \note This file should not be included directly. It is automatically included as needed by the ADC driver
* dispatch header located in LUFA/Drivers/Peripheral/SerialSPI.h.
*
- * \section Sec_ExampleUsage Example Usage
+ * \section Sec_SerialSPI_XMEGA_ExampleUsage Example Usage
* The following snippet is an example of how this module may be used within a typical
* application.
*
* \code
* // Initialize the Master SPI mode USART driver before first use, with 1Mbit baud
* SerialSPI_Init(&USARTD0, (USART_SPI_SCK_LEAD_RISING | USART_SPI_SAMPLE_LEADING | USART_SPI_ORDER_MSB_FIRST), 1000000);
- *
+ *
* // Send several bytes, ignoring the returned data
* SerialSPI_SendByte(&USARTD0, 0x01);
* SerialSPI_SendByte(&USARTD0, 0x02);
* SerialSPI_SendByte(&USARTD0, 0x03);
- *
+ *
* // Receive several bytes, sending a dummy 0x00 byte each time
* uint8_t Byte1 = SerialSPI_ReceiveByte(&USARTD);
* uint8_t Byte2 = SerialSPI_ReceiveByte(&USARTD);
* uint8_t Byte3 = SerialSPI_ReceiveByte(&USARTD);
- *
+ *
* // Send a byte, and store the received byte from the same transaction
* uint8_t ResponseByte = SerialSPI_TransferByte(&USARTD0, 0xDC);
* \endcode
/* Public Interface - May be used in end-application: */
/* Macros: */
/** \name SPI SCK Polarity Configuration Masks */
- //@{
+ /**@{*/
/** SPI clock polarity mask for \ref SerialSPI_Init(). Indicates that the SCK should lead on the rising edge. */
#define USART_SPI_SCK_LEAD_RISING 0
- //@}
+ /**@}*/
/** \name SPI Sample Edge Configuration Masks */
- //@{
+ /**@{*/
/** SPI data sample mode mask for \ref SerialSPI_Init(). Indicates that the data should sampled on the leading edge. */
#define USART_SPI_SAMPLE_LEADING 0
/** SPI data sample mode mask for \ref SerialSPI_Init(). Indicates that the data should be sampled on the trailing edge. */
- #define USART_SPI_SAMPLE_TRAILING USART_UPCHA_bm
- //@}
+ #define USART_SPI_SAMPLE_TRAILING (1 << 1)
+ /**@}*/
/** \name SPI Data Ordering Configuration Masks */
- //@{
+ /**@{*/
/** SPI data order mask for \ref SerialSPI_Init(). Indicates that data should be shifted out MSB first. */
#define USART_SPI_ORDER_MSB_FIRST 0
/** SPI data order mask for \ref SerialSPI_Init(). Indicates that data should be shifted out LSB first. */
- #define USART_SPI_ORDER_LSB_FIRST USART_UDORD_bm
- //@}
+ #define USART_SPI_ORDER_LSB_FIRST (1 << 2)
+ /**@}*/
/* Inline Functions: */
- /** Initialize the USART module in Master SPI mode.
+ /** Initialize the USART module in Master SPI mode.
*
* \param[in,out] USART Pointer to the base of the USART peripheral within the device.
* \param[in] SPIOptions USART SPI Options, a mask consisting of one of each of the \c USART_SPI_SCK_*,
*/
static inline void SerialSPI_Init(USART_t* const USART,
const uint8_t SPIOptions,
+ const uint32_t BaudRate) ATTR_NON_NULL_PTR_ARG(1);
+ static inline void SerialSPI_Init(USART_t* const USART,
+ const uint8_t SPIOptions,
const uint32_t BaudRate)
{
uint16_t BaudValue = SERIAL_SPI_UBBRVAL(BaudRate);
-
+
USART->BAUDCTRLB = (BaudValue >> 8);
USART->BAUDCTRLA = (BaudValue & 0xFF);
-
+
USART->CTRLC = (USART_CMODE_MSPI_gc | SPIOptions);
USART->CTRLB = (USART_RXEN_bm | USART_TXEN_bm);
}
-
+
/** Turns off the USART driver, disabling and returning used hardware to their default configuration.
*
* \param[in,out] USART Pointer to the base of the USART peripheral within the device.
*/
+ static inline void SerialSPI_Disable(USART_t* const USART) ATTR_ALWAYS_INLINE ATTR_NON_NULL_PTR_ARG(1);
static inline void SerialSPI_Disable(USART_t* const USART)
{
USART->CTRLA = 0;
USART->CTRLB = 0;
USART->CTRLC = 0;
}
-
+
/** Sends and receives a byte through the USART SPI interface, blocking until the transfer is complete.
*
* \param[in,out] USART Pointer to the base of the USART peripheral within the device.
* \return Response byte from the attached SPI device.
*/
static inline uint8_t SerialSPI_TransferByte(USART_t* const USART,
+ const uint8_t DataByte) ATTR_ALWAYS_INLINE ATTR_NON_NULL_PTR_ARG(1);
+ static inline uint8_t SerialSPI_TransferByte(USART_t* const USART,
const uint8_t DataByte)
{
USART->DATA = DataByte;
* \param[in] DataByte Byte to send through the USART SPI interface.
*/
static inline void SerialSPI_SendByte(USART_t* const USART,
+ const uint8_t DataByte) ATTR_ALWAYS_INLINE ATTR_NON_NULL_PTR_ARG(1);
+ static inline void SerialSPI_SendByte(USART_t* const USART,
const uint8_t DataByte)
{
SerialSPI_TransferByte(USART, DataByte);
*
* \return The response byte from the attached SPI device.
*/
+ static inline uint8_t SerialSPI_ReceiveByte(USART_t* const USART) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1);
static inline uint8_t SerialSPI_ReceiveByte(USART_t* const USART)
{
return SerialSPI_TransferByte(USART, 0);
}
-
+
/* Disable C linkage for C++ Compilers: */
#if defined(__cplusplus)
}
projects / pub / lufa.git / blobdiff