/*
LUFA Library
- Copyright (C) Dean Camera, 2012.
+ Copyright (C) Dean Camera, 2021.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
- Copyright 2012 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
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_SerialSPI
* \defgroup Group_SerialSPI_AVR8 Master SPI Mode Serial USART Peripheral Driver (AVR8)
*
- * \section Sec_ModDescription Module Description
+ * \section Sec_SerialSPI_AVR8_ModDescription Module Description
* On-chip serial USART driver for the 8-bit AVR8 microcontrollers.
*
* \note This file should not be included directly. It is automatically included as needed by the SPI Master
* driver dispatch header located in LUFA/Drivers/Peripheral/SerialSPI.h.
*
- * \section Sec_ExampleUsage Example Usage
+ * \section Sec_SerialSPI_AVR8_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((USART_SPI_SCK_LEAD_RISING | SPI_SAMPLE_LEADING | SPI_ORDER_MSB_FIRST), 1000000);
+ * SerialSPI_Init((USART_SPI_SCK_LEAD_RISING | USART_SPI_SAMPLE_LEADING | USART_SPI_ORDER_MSB_FIRST), 1000000);
*
* // Send several bytes, ignoring the returned data
* SerialSPI_SendByte(0x01);
#endif
/* Private Interface - For use in library only: */
- #if !defined(__DOXYGEN__)
- #define SERIAL_SPI_UBBRVAL(Baud) ((Baud < (F_CPU / 2)) ? ((F_CPU / (2 * Baud)) - 1) : 0)
- #endif
+ #if !defined(__DOXYGEN__)
+ #define SERIAL_SPI_UBBRVAL(Baud) ((Baud < (F_CPU / 2)) ? ((F_CPU / (2 * Baud)) - 1) : 0)
+
+ /* Master USART SPI mode flag definitions missing in the AVR8 toolchain */
+ #if !defined(UCPHA1)
+ #define UCPHA1 1
+ #endif
+ #if !defined(UDORD1)
+ #define UDORD1 2
+ #endif
+ #endif
/* Public Interface - May be used in end-application: */
/* Macros: */
/** \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 USART_SPI_SCK_LEAD_RISING (0 << UCPOL)
+ #define USART_SPI_SCK_LEAD_RISING (0 << UCPOL1)
/** SPI clock polarity mask for \ref SPI_Init(). Indicates that the SCK should lead on the falling edge. */
- #define USART_SPI_SCK_LEAD_FALLING (1 << UCPOL)
- //@}
+ #define USART_SPI_SCK_LEAD_FALLING (1 << UCPOL1)
+ /**@}*/
/** \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 << UPCHA)
+ #define USART_SPI_SAMPLE_LEADING (0 << UCPHA1)
/** 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 (1 << UPCHA)
- //@}
+ #define USART_SPI_SAMPLE_TRAILING (1 << UCPHA1)
+ /**@}*/
/** \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 << UDORD)
+ #define USART_SPI_ORDER_MSB_FIRST (0 << UDORD1)
/** SPI data order mask for \ref SerialSPI_Init(). Indicates that data should be shifted out LSB first. */
- #define USART_SPI_ORDER_LSB_FIRST (1 << UDORD)
- //@}
+ #define USART_SPI_ORDER_LSB_FIRST (1 << UDORD1)
+ /**@}*/
/* Inline Functions: */
- /** Initialize the USART module in Master SPI mode.
+ /** Initialize the USART module in Master SPI mode.
*
* \param[in] SPIOptions USART SPI Options, a mask consisting of one of each of the \c USART_SPI_SCK_*,
* \c USART_SPI_SAMPLE_* and \c USART_SPI_ORDER_* masks.
static inline void SerialSPI_Init(const uint8_t SPIOptions,
const uint32_t BaudRate)
{
- UBRR1 = SERIAL_SPI_UBBRVAL(BaudRate);
+ DDRD |= ((1 << 3) | (1 << 5));
+ PORTD |= (1 << 2);
UCSR1C = ((1 << UMSEL11) | (1 << UMSEL10) | SPIOptions);
UCSR1B = ((1 << TXEN1) | (1 << RXEN1));
- DDRD |= (1 << 3);
- PORTD |= (1 << 2);
+ UBRR1 = SERIAL_SPI_UBBRVAL(BaudRate);
}
/** Turns off the USART driver, disabling and returning used hardware to their default configuration. */
UBRR1 = 0;
- DDRD &= ~(1 << 3);
+ DDRD &= ~((1 << 3) | (1 << 5));
PORTD &= ~(1 << 2);
}
-
+
/** Sends and receives a byte through the USART SPI interface, blocking until the transfer is complete.
*
* \param[in] DataByte Byte to send through the USART SPI interface.
*/
static inline void SerialSPI_SendByte(const uint8_t DataByte)
{
- UDR1 = DataByte;
- while (!(UCSR1A & (1 << TXC1)));
- UCSR1A = (1 << TXC1);
+ SerialSPI_TransferByte(DataByte);
}
/** Sends a dummy byte through the USART SPI interface, blocking until the transfer is complete. The response
*/
static inline uint8_t SerialSPI_ReceiveByte(void)
{
- UDR1 = 0;
- while (!(UCSR1A & (1 << TXC1)));
- UCSR1A = (1 << TXC1);
- return UDR1;
+ return SerialSPI_TransferByte(0);
}
-
+
/* Disable C linkage for C++ Compilers: */
#if defined(__cplusplus)
}
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