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authorJack Humbert2017-07-07 11:55:23 -0400
committerJack Humbert2017-07-07 11:55:23 -0400
commit8655d4f4948b2deef7844503c8d690f23ac1a062 (patch)
treeb2c6effc9d6cd5b5b43933a1e53b8bf17e9e82cf /lib/lufa/LUFA/Drivers/Peripheral/XMEGA
parent1896c76a2928c96f9ab7947bec2ef8dd37623cff (diff)
parent60b30c036397cb5627fa374bb930794b225daa29 (diff)
Merge commit '60b30c036397cb5627fa374bb930794b225daa29' as 'lib/lufa'
Diffstat (limited to 'lib/lufa/LUFA/Drivers/Peripheral/XMEGA')
-rw-r--r--lib/lufa/LUFA/Drivers/Peripheral/XMEGA/SPI_XMEGA.h251
-rw-r--r--lib/lufa/LUFA/Drivers/Peripheral/XMEGA/SerialSPI_XMEGA.h212
-rw-r--r--lib/lufa/LUFA/Drivers/Peripheral/XMEGA/Serial_XMEGA.c126
-rw-r--r--lib/lufa/LUFA/Drivers/Peripheral/XMEGA/Serial_XMEGA.h289
-rw-r--r--lib/lufa/LUFA/Drivers/Peripheral/XMEGA/TWI_XMEGA.c185
-rw-r--r--lib/lufa/LUFA/Drivers/Peripheral/XMEGA/TWI_XMEGA.h302
6 files changed, 1365 insertions, 0 deletions
diff --git a/lib/lufa/LUFA/Drivers/Peripheral/XMEGA/SPI_XMEGA.h b/lib/lufa/LUFA/Drivers/Peripheral/XMEGA/SPI_XMEGA.h
new file mode 100644
index 000000000..7797df11a
--- /dev/null
+++ b/lib/lufa/LUFA/Drivers/Peripheral/XMEGA/SPI_XMEGA.h
@@ -0,0 +1,251 @@
+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2017.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.lufa-lib.org
+*/
+
+/*
+ Copyright 2017 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
+ without fee, provided that the above copyright notice appear in
+ all copies and that both that the copyright notice and this
+ permission notice and warranty disclaimer appear in supporting
+ documentation, and that the name of the author not be used in
+ advertising or publicity pertaining to distribution of the
+ software without specific, written prior permission.
+
+ 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
+ whatsoever resulting from loss of use, data or profits, whether
+ in an action of contract, negligence or other tortious action,
+ arising out of or in connection with the use or performance of
+ this software.
+*/
+
+/** \file
+ * \brief SPI Peripheral Driver (XMEGA)
+ *
+ * On-chip SPI driver for the XMEGA microcontrollers.
+ *
+ * \note This file should not be included directly. It is automatically included as needed by the SPI driver
+ * dispatch header located in LUFA/Drivers/Peripheral/SPI.h.
+ */
+
+/** \ingroup Group_SPI
+ * \defgroup Group_SPI_XMEGA SPI Peripheral Driver (XMEGA)
+ *
+ * \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.
+ *
+ * \note This file should not be included directly. It is automatically included as needed by the SPI driver
+ * dispatch header located in LUFA/Drivers/Peripheral/SPI.h.
+ *
+ * \code
+ * // Initialize the SPI driver before first use
+ * 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
+ *
+ * @{
+ */
+
+#ifndef __SPI_XMEGA_H__
+#define __SPI_XMEGA_H__
+
+ /* Includes: */
+ #include "../../../Common/Common.h"
+
+ /* Enable C linkage for C++ Compilers: */
+ #if defined(__cplusplus)
+ extern "C" {
+ #endif
+
+ /* Preprocessor Checks: */
+ #if !defined(__INCLUDE_FROM_SPI_H)
+ #error Do not include this file directly. Include LUFA/Drivers/Peripheral/SPI.h instead.
+ #endif
+
+ /* Private Interface - For use in library only: */
+ #if !defined(__DOXYGEN__)
+ /* Macros: */
+ #define SPI_USE_DOUBLESPEED SPI_CLK2X_bm
+ #endif
+
+ /* 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 4. */
+ #define SPI_SPEED_FCPU_DIV_4 0
+
+ /** SPI prescaler mask for \ref SPI_Init(). Divides the system clock by a factor of 8. */
+ #define SPI_SPEED_FCPU_DIV_8 (SPI_USE_DOUBLESPEED | (1 << SPI_PRESCALER_gp))
+
+ /** SPI prescaler mask for \ref SPI_Init(). Divides the system clock by a factor of 16. */
+ #define SPI_SPEED_FCPU_DIV_16 (1 << SPI_PRESCALER_gp)
+
+ /** SPI prescaler mask for \ref SPI_Init(). Divides the system clock by a factor of 32. */
+ #define SPI_SPEED_FCPU_DIV_32 (SPI_USE_DOUBLESPEED | (2 << SPI_PRESCALER_gp))
+
+ /** SPI prescaler mask for \ref SPI_Init(). Divides the system clock by a factor of 64. */
+ #define SPI_SPEED_FCPU_DIV_64 (2 << SPI_PRESCALER_gp)
+
+ /** 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
+ * SPI routines.
+ *
+ * \param[in,out] SPI Pointer to the base of the SPI peripheral within the device.
+ * \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(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);
+ }
+
+ /** Turns off the SPI driver, disabling and returning used hardware to their default configuration.
+ *
+ * \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;
+ }
+
+ /** Retrieves the currently selected SPI mode, once the SPI interface has been configured.
+ *
+ * \param[in,out] SPI Pointer to the base of the SPI peripheral within the device.
+ *
+ * \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 ATTR_NON_NULL_PTR_ARG(1);
+ static inline uint8_t SPI_GetCurrentMode(SPI_t* const SPI)
+ {
+ return (SPI->CTRL & SPI_MASTER_bm);
+ }
+
+ /** Sends and receives a byte through the SPI interface, blocking until the transfer is complete.
+ *
+ * \param[in,out] SPI Pointer to the base of the SPI peripheral within the device.
+ * \param[in] Byte Byte to send through the SPI interface.
+ *
+ * \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 ATTR_NON_NULL_PTR_ARG(1);
+ static inline uint8_t SPI_TransferByte(SPI_t* const SPI,
+ const uint8_t Byte)
+ {
+ SPI->DATA = Byte;
+ while (!(SPI->STATUS & SPI_IF_bm));
+ return SPI->DATA;
+ }
+
+ /** 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,out] SPI Pointer to the base of the SPI peripheral within the device.
+ * \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 ATTR_NON_NULL_PTR_ARG(1);
+ static inline void SPI_SendByte(SPI_t* const SPI,
+ const uint8_t Byte)
+ {
+ SPI->DATA = Byte;
+ while (!(SPI->STATUS & SPI_IF_bm));
+ }
+
+ /** Sends a dummy byte through the SPI interface, blocking until the transfer is complete. The response
+ * byte from the attached SPI device is returned.
+ *
+ * \param[in,out] SPI Pointer to the base of the SPI peripheral within the device.
+ *
+ * \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 ATTR_NON_NULL_PTR_ARG(1);
+ static inline uint8_t SPI_ReceiveByte(SPI_t* const SPI)
+ {
+ SPI->DATA = 0;
+ while (!(SPI->STATUS & SPI_IF_bm));
+ return SPI->DATA;
+ }
+
+ /* Disable C linkage for C++ Compilers: */
+ #if defined(__cplusplus)
+ }
+ #endif
+
+#endif
+
+/** @} */
+
diff --git a/lib/lufa/LUFA/Drivers/Peripheral/XMEGA/SerialSPI_XMEGA.h b/lib/lufa/LUFA/Drivers/Peripheral/XMEGA/SerialSPI_XMEGA.h
new file mode 100644
index 000000000..ca3235083
--- /dev/null
+++ b/lib/lufa/LUFA/Drivers/Peripheral/XMEGA/SerialSPI_XMEGA.h
@@ -0,0 +1,212 @@
+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2017.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.lufa-lib.org
+*/
+
+/*
+ Copyright 2017 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
+ without fee, provided that the above copyright notice appear in
+ all copies and that both that the copyright notice and this
+ permission notice and warranty disclaimer appear in supporting
+ documentation, and that the name of the author not be used in
+ advertising or publicity pertaining to distribution of the
+ software without specific, written prior permission.
+
+ 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
+ whatsoever resulting from loss of use, data or profits, whether
+ in an action of contract, negligence or other tortious action,
+ arising out of or in connection with the use or performance of
+ this software.
+*/
+
+/** \file
+ * \brief Master SPI Mode Serial USART Peripheral Driver (XMEGA)
+ *
+ * On-chip Master SPI mode USART driver for the XMEGA AVR microcontrollers.
+ *
+ * \note This file should not be included directly. It is automatically included as needed by the SPI Master
+ * Mode USART driver dispatch header located in LUFA/Drivers/Peripheral/Serial.h.
+ */
+
+/** \ingroup Group_SerialSPI
+ * \defgroup Group_SerialSPI_XMEGA Master SPI Mode Serial USART Peripheral Driver (XMEGA)
+ *
+ * \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_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
+ *
+ * @{
+ */
+
+#ifndef __SERIAL_SPI_XMEGA_H__
+#define __SERIAL_SPI_XMEGA_H__
+
+ /* Includes: */
+ #include "../../../Common/Common.h"
+
+ #include <stdio.h>
+
+ /* Enable C linkage for C++ Compilers: */
+ #if defined(__cplusplus)
+ extern "C" {
+ #endif
+
+ /* Preprocessor Checks: */
+ #if !defined(__INCLUDE_FROM_SERIAL_SPI_H)
+ #error Do not include this file directly. Include LUFA/Drivers/Peripheral/Serial.h instead.
+ #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
+
+ /* 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 (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 (1 << 2)
+ //@}
+
+ /* Inline Functions: */
+ /** 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_*,
+ * \c USART_SPI_SAMPLE_* and \c USART_SPI_ORDER_* masks.
+ * \param[in] BaudRate SPI baud rate, in bits per second.
+ */
+ 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.
+ * \param[in] DataByte Byte to send through the USART SPI interface.
+ *
+ * \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;
+ while (!(USART->STATUS & USART_TXCIF_bm));
+ USART->STATUS = USART_TXCIF_bm;
+ return USART->DATA;
+ }
+
+ /** Sends a byte through the USART SPI interface, blocking until the transfer is complete. The response
+ * byte sent to from the attached SPI device is ignored.
+ *
+ * \param[in,out] USART Pointer to the base of the USART peripheral within the device.
+ * \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);
+ }
+
+ /** Sends a dummy byte through the USART SPI interface, blocking until the transfer is complete. The response
+ * byte from the attached SPI device is returned.
+ *
+ * \param[in,out] USART Pointer to the base of the USART peripheral within the device.
+ *
+ * \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)
+ }
+ #endif
+
+#endif
+
+/** @} */
+
diff --git a/lib/lufa/LUFA/Drivers/Peripheral/XMEGA/Serial_XMEGA.c b/lib/lufa/LUFA/Drivers/Peripheral/XMEGA/Serial_XMEGA.c
new file mode 100644
index 000000000..9ecda47d2
--- /dev/null
+++ b/lib/lufa/LUFA/Drivers/Peripheral/XMEGA/Serial_XMEGA.c
@@ -0,0 +1,126 @@
+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2017.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.lufa-lib.org
+*/
+
+/*
+ Copyright 2017 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
+ without fee, provided that the above copyright notice appear in
+ all copies and that both that the copyright notice and this
+ permission notice and warranty disclaimer appear in supporting
+ documentation, and that the name of the author not be used in
+ advertising or publicity pertaining to distribution of the
+ software without specific, written prior permission.
+
+ 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
+ whatsoever resulting from loss of use, data or profits, whether
+ in an action of contract, negligence or other tortious action,
+ arising out of or in connection with the use or performance of
+ this software.
+*/
+
+#include "../../../Common/Common.h"
+#if (ARCH == ARCH_XMEGA)
+
+#define __INCLUDE_FROM_SERIAL_C
+#include "../Serial.h"
+
+FILE USARTSerialStream;
+
+int Serial_putchar(char DataByte,
+ FILE *Stream)
+{
+ USART_t* USART = fdev_get_udata(Stream);
+
+ Serial_SendByte(USART, DataByte);
+ return 0;
+}
+
+int Serial_getchar(FILE *Stream)
+{
+ USART_t* USART = fdev_get_udata(Stream);
+
+ if (!(Serial_IsCharReceived(USART)))
+ return _FDEV_EOF;
+
+ return Serial_ReceiveByte(USART);
+}
+
+int Serial_getchar_Blocking(FILE *Stream)
+{
+ USART_t* USART = fdev_get_udata(Stream);
+
+ while (!(Serial_IsCharReceived(USART)));
+ return Serial_ReceiveByte(USART);
+}
+
+void Serial_SendString_P(USART_t* const USART,
+ const char* FlashStringPtr)
+{
+ uint8_t CurrByte;
+
+ while ((CurrByte = pgm_read_byte(FlashStringPtr)) != 0x00)
+ {
+ Serial_SendByte(USART, CurrByte);
+ FlashStringPtr++;
+ }
+}
+
+void Serial_SendString(USART_t* const USART,
+ const char* StringPtr)
+{
+ uint8_t CurrByte;
+
+ while ((CurrByte = *StringPtr) != 0x00)
+ {
+ Serial_SendByte(USART, CurrByte);
+ StringPtr++;
+ }
+}
+
+void Serial_SendData(USART_t* const USART,
+ const void* Buffer,
+ uint16_t Length)
+{
+ uint8_t* CurrByte = (uint8_t*)Buffer;
+
+ while (Length--)
+ Serial_SendByte(USART, *(CurrByte++));
+}
+
+void Serial_CreateStream(USART_t* USART, FILE* Stream)
+{
+ if (!(Stream))
+ {
+ Stream = &USARTSerialStream;
+ stdin = Stream;
+ stdout = Stream;
+ }
+
+ *Stream = (FILE)FDEV_SETUP_STREAM(Serial_putchar, Serial_getchar, _FDEV_SETUP_RW);
+ fdev_set_udata(Stream, USART);
+}
+
+void Serial_CreateBlockingStream(USART_t* USART, FILE* Stream)
+{
+ if (!(Stream))
+ {
+ Stream = &USARTSerialStream;
+ stdin = Stream;
+ stdout = Stream;
+ }
+
+ *Stream = (FILE)FDEV_SETUP_STREAM(Serial_putchar, Serial_getchar_Blocking, _FDEV_SETUP_RW);
+ fdev_set_udata(Stream, USART);
+}
+
+#endif
diff --git a/lib/lufa/LUFA/Drivers/Peripheral/XMEGA/Serial_XMEGA.h b/lib/lufa/LUFA/Drivers/Peripheral/XMEGA/Serial_XMEGA.h
new file mode 100644
index 000000000..36f507d43
--- /dev/null
+++ b/lib/lufa/LUFA/Drivers/Peripheral/XMEGA/Serial_XMEGA.h
@@ -0,0 +1,289 @@
+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2017.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.lufa-lib.org
+*/
+
+/*
+ Copyright 2017 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
+ without fee, provided that the above copyright notice appear in
+ all copies and that both that the copyright notice and this
+ permission notice and warranty disclaimer appear in supporting
+ documentation, and that the name of the author not be used in
+ advertising or publicity pertaining to distribution of the
+ software without specific, written prior permission.
+
+ 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
+ whatsoever resulting from loss of use, data or profits, whether
+ in an action of contract, negligence or other tortious action,
+ arising out of or in connection with the use or performance of
+ this software.
+*/
+
+/** \file
+ * \brief Serial USART Peripheral Driver (XMEGA)
+ *
+ * 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 USART driver
+ * dispatch header located in LUFA/Drivers/Peripheral/Serial.h.
+ */
+
+/** \ingroup Group_Serial
+ * \defgroup Group_Serial_XMEGA Serial USART Peripheral Driver (XMEGA)
+ *
+ * \section Sec_Serial_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 USART driver
+ * dispatch header located in LUFA/Drivers/Peripheral/Serial.h.
+ *
+ * \section Sec_Serial_XMEGA_ExampleUsage Example Usage
+ * The following snippet is an example of how this module may be used within a typical
+ * application.
+ *
+ * \code
+ * // Initialize the serial USART driver before first use, with 9600 baud (and no double-speed mode)
+ * Serial_Init(&USARTD0, 9600, false);
+ *
+ * // Send a string through the USART
+ * Serial_TxString(&USARTD0, "Test String\r\n");
+ *
+ * // Receive a byte through the USART
+ * uint8_t DataByte = Serial_RxByte(&USARTD0);
+ * \endcode
+ *
+ * @{
+ */
+
+#ifndef __SERIAL_XMEGA_H__
+#define __SERIAL_XMEGA_H__
+
+ /* Includes: */
+ #include "../../../Common/Common.h"
+ #include "../../Misc/TerminalCodes.h"
+
+ #include <stdio.h>
+
+ /* Enable C linkage for C++ Compilers: */
+ #if defined(__cplusplus)
+ extern "C" {
+ #endif
+
+ /* Preprocessor Checks: */
+ #if !defined(__INCLUDE_FROM_SERIAL_H) && !defined(__INCLUDE_FROM_SERIAL_C)
+ #error Do not include this file directly. Include LUFA/Drivers/Peripheral/Serial.h instead.
+ #endif
+
+ /* Private Interface - For use in library only: */
+ #if !defined(__DOXYGEN__)
+ /* External Variables: */
+ extern FILE USARTSerialStream;
+
+ /* Function Prototypes: */
+ int Serial_putchar(char DataByte,
+ FILE *Stream);
+ int Serial_getchar(FILE *Stream);
+ int Serial_getchar_Blocking(FILE *Stream);
+ #endif
+
+ /* Public Interface - May be used in end-application: */
+ /* Macros: */
+ /** Macro for calculating the baud value from a given baud rate when the \c U2X (double speed) bit is
+ * not set.
+ *
+ * \param[in] Baud Target serial UART baud rate.
+ *
+ * \return Closest UBRR register value for the given UART frequency.
+ */
+ #define SERIAL_UBBRVAL(Baud) ((((F_CPU / 16) + (Baud / 2)) / (Baud)) - 1)
+
+ /** Macro for calculating the baud value from a given baud rate when the \c U2X (double speed) bit is
+ * set.
+ *
+ * \param[in] Baud Target serial UART baud rate.
+ *
+ * \return Closest UBRR register value for the given UART frequency.
+ */
+ #define SERIAL_2X_UBBRVAL(Baud) ((((F_CPU / 8) + (Baud / 2)) / (Baud)) - 1)
+
+ /* Function Prototypes: */
+ /** Transmits a given string located in program space (FLASH) through the USART.
+ *
+ * \param[in,out] USART Pointer to the base of the USART peripheral within the device.
+ * \param[in] FlashStringPtr Pointer to a string located in program space.
+ */
+ void Serial_SendString_P(USART_t* const USART,
+ const char* FlashStringPtr) ATTR_NON_NULL_PTR_ARG(1);
+
+ /** Transmits a given string located in SRAM memory through the USART.
+ *
+ * \param[in,out] USART Pointer to the base of the USART peripheral within the device.
+ * \param[in] StringPtr Pointer to a string located in SRAM space.
+ */
+ void Serial_SendString(USART_t* const USART,
+ const char* StringPtr) ATTR_NON_NULL_PTR_ARG(1);
+
+ /** Transmits a given buffer located in SRAM memory through the USART.
+ *
+ * \param[in,out] USART Pointer to the base of the USART peripheral within the device.
+ * \param[in] Buffer Pointer to a buffer containing the data to send.
+ * \param[in] Length Length of the data to send, in bytes.
+ */
+ void Serial_SendData(USART_t* const USART,
+ const void* Buffer,
+ uint16_t Length) ATTR_NON_NULL_PTR_ARG(1);
+
+ /** Creates a standard character stream from the USART so that it can be used with all the regular functions
+ * in the avr-libc \c <stdio.h> library that accept a \c FILE stream as a destination (e.g. \c fprintf). The created
+ * stream is bidirectional and can be used for both input and output functions.
+ *
+ * Reading data from this stream is non-blocking, i.e. in most instances, complete strings cannot be read in by a single
+ * fetch, as the endpoint will not be ready at some point in the transmission, aborting the transfer. However, this may
+ * be used when the read data is processed byte-per-bye (via \c getc()) or when the user application will implement its own
+ * line buffering.
+ *
+ * \param[in,out] USART Pointer to the base of the USART peripheral within the device.
+ * \param[in,out] Stream Pointer to a FILE structure where the created stream should be placed, if \c NULL, \c stdout
+ * and \c stdin will be configured to use the USART.
+ *
+ * \pre The USART must first be configured via a call to \ref Serial_Init() before the stream is used.
+ */
+ void Serial_CreateStream(USART_t* USART, FILE* Stream);
+
+ /** Identical to \ref Serial_CreateStream(), except that reads are blocking until the calling stream function terminates
+ * the transfer.
+ *
+ * \param[in,out] USART Pointer to the base of the USART peripheral within the device.
+ * \param[in,out] Stream Pointer to a FILE structure where the created stream should be placed, if \c NULL, \c stdout
+ * and \c stdin will be configured to use the USART.
+ *
+ * \pre The USART must first be configured via a call to \ref Serial_Init() before the stream is used.
+ */
+ void Serial_CreateBlockingStream(USART_t* USART, FILE* Stream);
+
+ /* Inline Functions: */
+ /** Initializes the USART, ready for serial data transmission and reception. This initializes the interface to
+ * standard 8-bit, no parity, 1 stop bit settings suitable for most applications.
+ *
+ * \param[in,out] USART Pointer to the base of the USART peripheral within the device.
+ * \param[in] BaudRate Serial baud rate, in bits per second. This should be the target baud rate regardless of
+ * the \c DoubleSpeed parameter's value.
+ * \param[in] DoubleSpeed Enables double speed mode when set, halving the sample time to double the baud rate.
+ */
+ static inline void Serial_Init(USART_t* const USART,
+ const uint32_t BaudRate,
+ const bool DoubleSpeed) ATTR_NON_NULL_PTR_ARG(1);
+ static inline void Serial_Init(USART_t* const USART,
+ const uint32_t BaudRate,
+ const bool DoubleSpeed)
+ {
+ uint16_t BaudValue = (DoubleSpeed ? SERIAL_2X_UBBRVAL(BaudRate) : SERIAL_UBBRVAL(BaudRate));
+
+ USART->BAUDCTRLB = (BaudValue >> 8);
+ USART->BAUDCTRLA = (BaudValue & 0xFF);
+
+ USART->CTRLC = (USART_CMODE_ASYNCHRONOUS_gc | USART_PMODE_DISABLED_gc | USART_CHSIZE_8BIT_gc);
+ USART->CTRLB = (USART_RXEN_bm | USART_TXEN_bm | (DoubleSpeed ? USART_CLK2X_bm : 0));
+ }
+
+ /** 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 Serial_Disable(USART_t* const USART) ATTR_ALWAYS_INLINE ATTR_NON_NULL_PTR_ARG(1);
+ static inline void Serial_Disable(USART_t* const USART)
+ {
+ USART->CTRLA = 0;
+ USART->CTRLB = 0;
+ USART->CTRLC = 0;
+ }
+
+ /** Indicates whether a character has been received through the USART.
+ *
+ * \param[in,out] USART Pointer to the base of the USART peripheral within the device.
+ *
+ * \return Boolean \c true if a character has been received, \c false otherwise.
+ */
+ static inline bool Serial_IsCharReceived(USART_t* const USART) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1);
+ static inline bool Serial_IsCharReceived(USART_t* const USART)
+ {
+ return ((USART->STATUS & USART_RXCIF_bm) ? true : false);
+ }
+
+ /** Indicates whether there is hardware buffer space for a new transmit on the USART. This
+ * function can be used to determine if a call to \ref Serial_SendByte() will block in advance.
+ *
+ * \param[in,out] USART Pointer to the base of the USART peripheral within the device.
+ *
+ * \return Boolean \c true if a character can be queued for transmission immediately, \c false otherwise.
+ */
+ static inline bool Serial_IsSendReady(USART_t* const USART) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1);
+ static inline bool Serial_IsSendReady(USART_t* const USART)
+ {
+ return (USART->STATUS & USART_DREIF_bm) ? true : false;
+ }
+
+ /** Indicates whether the hardware USART transmit buffer is completely empty, indicating all
+ * pending transmissions have completed.
+ *
+ * \param[in,out] USART Pointer to the base of the USART peripheral within the device.
+ *
+ * \return Boolean \c true if no characters are buffered for transmission, \c false otherwise.
+ */
+ static inline bool Serial_IsSendComplete(USART_t* const USART) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1);
+ static inline bool Serial_IsSendComplete(USART_t* const USART)
+ {
+ return (USART->STATUS & USART_TXCIF_bm) ? true : false;
+ }
+
+ /** Transmits a given byte through the USART.
+ *
+ * \note If no buffer space is available in the hardware USART, this function will block. To check if
+ * space is available before calling this function, see \ref Serial_IsSendReady().
+ *
+ * \param[in,out] USART Pointer to the base of the USART peripheral within the device.
+ * \param[in] DataByte Byte to transmit through the USART.
+ */
+ static inline void Serial_SendByte(USART_t* const USART,
+ const char DataByte) ATTR_ALWAYS_INLINE ATTR_NON_NULL_PTR_ARG(1);
+ static inline void Serial_SendByte(USART_t* const USART,
+ const char DataByte)
+ {
+ while (!(Serial_IsSendReady(USART)));
+ USART->DATA = DataByte;
+ }
+
+ /** Receives the next byte from the USART.
+ *
+ * \param[in,out] USART Pointer to the base of the USART peripheral within the device.
+ *
+ * \return Next byte received from the USART, or a negative value if no byte has been received.
+ */
+ static inline int16_t Serial_ReceiveByte(USART_t* const USART) ATTR_ALWAYS_INLINE ATTR_NON_NULL_PTR_ARG(1);
+ static inline int16_t Serial_ReceiveByte(USART_t* const USART)
+ {
+ if (!(Serial_IsCharReceived(USART)))
+ return -1;
+
+ USART->STATUS = USART_RXCIF_bm;
+ return USART->DATA;
+ }
+
+ /* Disable C linkage for C++ Compilers: */
+ #if defined(__cplusplus)
+ }
+ #endif
+
+#endif
+
+/** @} */
+
diff --git a/lib/lufa/LUFA/Drivers/Peripheral/XMEGA/TWI_XMEGA.c b/lib/lufa/LUFA/Drivers/Peripheral/XMEGA/TWI_XMEGA.c
new file mode 100644
index 000000000..92cc643b9
--- /dev/null
+++ b/lib/lufa/LUFA/Drivers/Peripheral/XMEGA/TWI_XMEGA.c
@@ -0,0 +1,185 @@
+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2017.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.lufa-lib.org
+*/
+
+/*
+ Copyright 2017 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
+ without fee, provided that the above copyright notice appear in
+ all copies and that both that the copyright notice and this
+ permission notice and warranty disclaimer appear in supporting
+ documentation, and that the name of the author not be used in
+ advertising or publicity pertaining to distribution of the
+ software without specific, written prior permission.
+
+ 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
+ whatsoever resulting from loss of use, data or profits, whether
+ in an action of contract, negligence or other tortious action,
+ arising out of or in connection with the use or performance of
+ this software.
+*/
+
+#include "../../../Common/Common.h"
+#if (ARCH == ARCH_XMEGA)
+
+#define __INCLUDE_FROM_TWI_C
+#include "../TWI.h"
+
+uint8_t TWI_StartTransmission(TWI_t* const TWI,
+ const uint8_t SlaveAddress,
+ const uint8_t TimeoutMS)
+{
+ uint16_t TimeoutRemaining;
+
+ TWI->MASTER.ADDR = SlaveAddress;
+
+ TimeoutRemaining = (TimeoutMS * 100);
+ while (TimeoutRemaining)
+ {
+ uint8_t status = TWI->MASTER.STATUS;
+
+ if ((status & (TWI_MASTER_WIF_bm | TWI_MASTER_ARBLOST_bm)) == (TWI_MASTER_WIF_bm | TWI_MASTER_ARBLOST_bm))
+ {
+ TWI->MASTER.ADDR = SlaveAddress;
+ }
+ else if ((status & (TWI_MASTER_WIF_bm | TWI_MASTER_RXACK_bm)) == (TWI_MASTER_WIF_bm | TWI_MASTER_RXACK_bm))
+ {
+ TWI_StopTransmission(TWI);
+ return TWI_ERROR_SlaveResponseTimeout;
+ }
+ else if (status & (TWI_MASTER_WIF_bm | TWI_MASTER_RIF_bm))
+ {
+ return TWI_ERROR_NoError;
+ }
+
+ _delay_us(10);
+ TimeoutRemaining--;
+ }
+
+ if (!(TimeoutRemaining)) {
+ if (TWI->MASTER.STATUS & TWI_MASTER_CLKHOLD_bm) {
+ TWI_StopTransmission(TWI);
+ }
+ }
+
+ return TWI_ERROR_BusCaptureTimeout;
+}
+
+bool TWI_SendByte(TWI_t* const TWI,
+ const uint8_t Byte)
+{
+ TWI->MASTER.DATA = Byte;
+
+ while (!(TWI->MASTER.STATUS & TWI_MASTER_WIF_bm));
+
+ return (TWI->MASTER.STATUS & TWI_MASTER_WIF_bm) && !(TWI->MASTER.STATUS & TWI_MASTER_RXACK_bm);
+}
+
+bool TWI_ReceiveByte(TWI_t* const TWI,
+ uint8_t* const Byte,
+ const bool LastByte)
+{
+ if ((TWI->MASTER.STATUS & (TWI_MASTER_BUSERR_bm | TWI_MASTER_ARBLOST_bm)) == (TWI_MASTER_BUSERR_bm | TWI_MASTER_ARBLOST_bm)) {
+ return false;
+ }
+
+ while (!(TWI->MASTER.STATUS & TWI_MASTER_RIF_bm));
+
+ *Byte = TWI->MASTER.DATA;
+
+ if (LastByte)
+ TWI->MASTER.CTRLC = TWI_MASTER_ACKACT_bm | TWI_MASTER_CMD_STOP_gc;
+ else
+ TWI->MASTER.CTRLC = TWI_MASTER_CMD_RECVTRANS_gc;
+
+ return true;
+}
+
+uint8_t TWI_ReadPacket(TWI_t* const TWI,
+ const uint8_t SlaveAddress,
+ const uint8_t TimeoutMS,
+ const uint8_t* InternalAddress,
+ uint8_t InternalAddressLen,
+ uint8_t* Buffer,
+ uint16_t Length)
+{
+ uint8_t ErrorCode;
+
+ if ((ErrorCode = TWI_StartTransmission(TWI, (SlaveAddress & TWI_DEVICE_ADDRESS_MASK) | TWI_ADDRESS_WRITE,
+ TimeoutMS)) == TWI_ERROR_NoError)
+ {
+ while (InternalAddressLen--)
+ {
+ if (!(TWI_SendByte(TWI, *(InternalAddress++))))
+ {
+ ErrorCode = TWI_ERROR_SlaveNAK;
+ break;
+ }
+ }
+
+ if ((ErrorCode = TWI_StartTransmission(TWI, (SlaveAddress & TWI_DEVICE_ADDRESS_MASK) | TWI_ADDRESS_READ,
+ TimeoutMS)) == TWI_ERROR_NoError)
+ {
+ while (Length--)
+ {
+ if (!(TWI_ReceiveByte(TWI, Buffer++, (Length == 0))))
+ {
+ ErrorCode = TWI_ERROR_SlaveNAK;
+ break;
+ }
+ }
+ }
+
+ TWI_StopTransmission(TWI);
+ }
+
+ return ErrorCode;
+}
+
+uint8_t TWI_WritePacket(TWI_t* const TWI,
+ const uint8_t SlaveAddress,
+ const uint8_t TimeoutMS,
+ const uint8_t* InternalAddress,
+ uint8_t InternalAddressLen,
+ const uint8_t* Buffer,
+ uint16_t Length)
+{
+ uint8_t ErrorCode;
+
+ if ((ErrorCode = TWI_StartTransmission(TWI, (SlaveAddress & TWI_DEVICE_ADDRESS_MASK) | TWI_ADDRESS_WRITE,
+ TimeoutMS)) == TWI_ERROR_NoError)
+ {
+ while (InternalAddressLen--)
+ {
+ if (!(TWI_SendByte(TWI, *(InternalAddress++))))
+ {
+ ErrorCode = TWI_ERROR_SlaveNAK;
+ break;
+ }
+ }
+
+ while (Length--)
+ {
+ if (!(TWI_SendByte(TWI, *(Buffer++))))
+ {
+ ErrorCode = TWI_ERROR_SlaveNAK;
+ break;
+ }
+ }
+
+ TWI_StopTransmission(TWI);
+ }
+
+ return ErrorCode;
+}
+
+#endif
diff --git a/lib/lufa/LUFA/Drivers/Peripheral/XMEGA/TWI_XMEGA.h b/lib/lufa/LUFA/Drivers/Peripheral/XMEGA/TWI_XMEGA.h
new file mode 100644
index 000000000..94ada7371
--- /dev/null
+++ b/lib/lufa/LUFA/Drivers/Peripheral/XMEGA/TWI_XMEGA.h
@@ -0,0 +1,302 @@
+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2017.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.lufa-lib.org
+*/
+
+/*
+ Copyright 2017 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
+ without fee, provided that the above copyright notice appear in
+ all copies and that both that the copyright notice and this
+ permission notice and warranty disclaimer appear in supporting
+ documentation, and that the name of the author not be used in
+ advertising or publicity pertaining to distribution of the
+ software without specific, written prior permission.
+
+ 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
+ whatsoever resulting from loss of use, data or profits, whether
+ in an action of contract, negligence or other tortious action,
+ arising out of or in connection with the use or performance of
+ this software.
+*/
+
+/** \file
+ * \brief TWI Peripheral Driver (XMEGA)
+ *
+ * On-chip TWI driver for the XMEGA Family of AVR microcontrollers.
+ *
+ * \note This file should not be included directly. It is automatically included as needed by the TWI driver
+ * dispatch header located in LUFA/Drivers/Peripheral/TWI.h.
+ */
+
+/** \ingroup Group_TWI
+ * \defgroup Group_TWI_XMEGA TWI Peripheral Driver (XMEGA)
+ *
+ * \section Sec_TWI_XMEGA_ModDescription Module Description
+ * Master mode TWI driver for the 8-bit AVR microcontrollers which contain a hardware TWI module.
+ *
+ * \note This file should not be included directly. It is automatically included as needed by the TWI driver
+ * dispatch header located in LUFA/Drivers/Peripheral/TWI.h.
+ *
+ * \section Sec_TWI_XMEGA_ExampleUsage Example Usage
+ * The following snippet is an example of how this module may be used within a typical
+ * application.
+ *
+ * <b>Low Level API Example:</b>
+ * \code
+ * // Initialize the TWI driver before first use at 200KHz
+ * TWI_Init(&TWIC, TWI_BAUD_FROM_FREQ(200000));
+ *
+ * // Start a write session to device at device address 0xA0, internal address 0xDC with a 10ms timeout
+ * if (TWI_StartTransmission(&TWIC, 0xA0 | TWI_ADDRESS_WRITE, 10) == TWI_ERROR_NoError)
+ * {
+ * TWI_SendByte(&TWIC, 0xDC);
+ *
+ * TWI_SendByte(&TWIC, 0x01);
+ * TWI_SendByte(&TWIC, 0x02);
+ * TWI_SendByte(&TWIC, 0x03);
+ *
+ * // Must stop transmission afterwards to release the bus
+ * TWI_StopTransmission(&TWIC);
+ * }
+ *
+ * // Start a read session to device at address 0xA0, internal address 0xDC with a 10ms timeout
+ * if (TWI_StartTransmission(&TWIC, 0xA0 | TWI_ADDRESS_WRITE, 10) == TWI_ERROR_NoError)
+ * {
+ * TWI_SendByte(&TWIC, 0xDC);
+ * TWI_StopTransmission(&TWIC);
+ *
+ * if (TWI_StartTransmission(&TWIC, 0xA0 | TWI_ADDRESS_READ, 10) == TWI_ERROR_NoError)
+ * {
+ * uint8_t Byte1, Byte2, Byte3;
+ *
+ * // Read three bytes, acknowledge after the third byte is received
+ * TWI_ReceiveByte(&TWIC, &Byte1, false);
+ * TWI_ReceiveByte(&TWIC, &Byte2, false);
+ * TWI_ReceiveByte(&TWIC, &Byte3, true);
+ *
+ * // Must stop transmission afterwards to release the bus
+ * TWI_StopTransmission(&TWIC);
+ * }
+ * }
+ * \endcode
+ *
+ * <b>High Level API Example:</b>
+ * \code
+ * // Initialize the TWI driver before first use at 200KHz
+ * TWI_Init(&TWIC, TWI_BAUD_FROM_FREQ(200000));
+ *
+ * // Start a write session to device at device address 0xA0, internal address 0xDC with a 10ms timeout
+ * uint8_t InternalWriteAddress = 0xDC;
+ * uint8_t WritePacket[3] = {0x01, 0x02, 0x03};
+ *
+ * TWI_WritePacket(&TWIC, 0xA0, 10, &InternalWriteAddress, sizeof(InternalWriteAddress),
+ * &WritePacket, sizeof(WritePacket);
+ *
+ * // Start a read session to device at address 0xA0, internal address 0xDC with a 10ms timeout
+ * uint8_t InternalReadAddress = 0xDC;
+ * uint8_t ReadPacket[3];
+ *
+ * TWI_ReadPacket(&TWIC, 0xA0, 10, &InternalReadAddress, sizeof(InternalReadAddress),
+ * &ReadPacket, sizeof(ReadPacket);
+ * \endcode
+ *
+ * @{
+ */
+
+#ifndef __TWI_XMEGA_H__
+#define __TWI_XMEGA_H__
+
+ /* Includes: */
+ #include "../../../Common/Common.h"
+
+ #include <stdio.h>
+
+ /* Enable C linkage for C++ Compilers: */
+ #if defined(__cplusplus)
+ extern "C" {
+ #endif
+
+ /* Preprocessor Checks: */
+ #if !defined(__INCLUDE_FROM_TWI_H) && !defined(__INCLUDE_FROM_TWI_C)
+ #error Do not include this file directly. Include LUFA/Drivers/Peripheral/TWI.h instead.
+ #endif
+
+ /* Public Interface - May be used in end-application: */
+ /* Macros: */
+ /** TWI slave device address mask for a read session. Mask with a slave device base address to obtain
+ * the correct TWI bus address for the slave device when reading data from it.
+ */
+ #define TWI_ADDRESS_READ 0x01
+
+ /** TWI slave device address mask for a write session. Mask with a slave device base address to obtain
+ * the correct TWI bus address for the slave device when writing data to it.
+ */
+ #define TWI_ADDRESS_WRITE 0x00
+
+ /** Mask to retrieve the base address for a TWI device, which can then be ORed with \ref TWI_ADDRESS_READ
+ * or \ref TWI_ADDRESS_WRITE to obtain the device's read and write address respectively.
+ */
+ #define TWI_DEVICE_ADDRESS_MASK 0xFE
+
+ /** Calculates the length of each bit on the TWI bus for a given target frequency. This may be used with
+ * the \ref TWI_Init() function to convert a bus frequency to a number of clocks for the \c BitLength
+ * parameter.
+ *
+ * \param[in] Frequency Desired TWI bus frequency in Hz.
+ *
+ * \return Bit length in clocks for the given TWI bus frequency at the given prescaler value.
+ */
+ #define TWI_BAUD_FROM_FREQ(Frequency) ((F_CPU / (2 * Frequency)) - 5)
+
+ /* Enums: */
+ /** Enum for the possible return codes of the TWI transfer start routine and other dependant TWI functions. */
+ enum TWI_ErrorCodes_t
+ {
+ TWI_ERROR_NoError = 0, /**< Indicates that the command completed successfully. */
+ TWI_ERROR_BusFault = 1, /**< A TWI bus fault occurred while attempting to capture the bus. */
+ TWI_ERROR_BusCaptureTimeout = 2, /**< A timeout occurred whilst waiting for the bus to be ready. */
+ TWI_ERROR_SlaveResponseTimeout = 3, /**< No ACK received at the nominated slave address within the timeout period. */
+ TWI_ERROR_SlaveNotReady = 4, /**< Slave NAKed the TWI bus START condition. */
+ TWI_ERROR_SlaveNAK = 5, /**< Slave NAKed whilst attempting to send data to the device. */
+ };
+
+ /* Inline Functions: */
+ /** Initializes the TWI hardware into master mode, ready for data transmission and reception. This must be
+ * before any other TWI operations.
+ *
+ * The generated SCL frequency will be according to the formula <pre>F_CPU / (2 * (5 + (BAUD)))</pre>.
+ *
+ * \attention The value of the \c BitLength parameter should not be set below 10 or invalid bus conditions may
+ * occur, as indicated in the XMEGA microcontroller datasheet.
+ *
+ * \param[in] TWI Pointer to the base of the TWI peripheral within the device.
+ * \param[in] Baud Value of the BAUD register of the TWI Master.
+ */
+ static inline void TWI_Init(TWI_t* const TWI,
+ const uint8_t Baud) ATTR_ALWAYS_INLINE ATTR_NON_NULL_PTR_ARG(1);
+ static inline void TWI_Init(TWI_t* const TWI,
+ const uint8_t Baud)
+ {
+ TWI->CTRL = 0x00;
+ TWI->MASTER.BAUD = Baud;
+ TWI->MASTER.CTRLA = TWI_MASTER_ENABLE_bm;
+ TWI->MASTER.CTRLB = 0;
+ TWI->MASTER.STATUS = TWI_MASTER_BUSSTATE_IDLE_gc;
+ }
+
+ /** Turns off the TWI driver hardware. If this is called, any further TWI operations will require a call to
+ * \ref TWI_Init() before the TWI can be used again.
+ *
+ * \param[in] TWI Pointer to the base of the TWI peripheral within the device.
+ */
+ static inline void TWI_Disable(TWI_t* const TWI) ATTR_ALWAYS_INLINE ATTR_NON_NULL_PTR_ARG(1);
+ static inline void TWI_Disable(TWI_t* const TWI)
+ {
+ TWI->MASTER.CTRLA &= ~TWI_MASTER_ENABLE_bm;
+ }
+
+ /** Sends a TWI STOP onto the TWI bus, terminating communication with the currently addressed device.
+ *
+ * \param[in] TWI Pointer to the base of the TWI peripheral within the device.
+ */
+ static inline void TWI_StopTransmission(TWI_t* const TWI) ATTR_ALWAYS_INLINE ATTR_NON_NULL_PTR_ARG(1);
+ static inline void TWI_StopTransmission(TWI_t* const TWI)
+ {
+ TWI->MASTER.CTRLC = TWI_MASTER_ACKACT_bm | TWI_MASTER_CMD_STOP_gc;
+ }
+
+ /* Function Prototypes: */
+ /** Begins a master mode TWI bus communication with the given slave device address.
+ *
+ * \param[in] TWI Pointer to the base of the TWI peripheral within the device.
+ * \param[in] SlaveAddress Address of the slave TWI device to communicate with.
+ * \param[in] TimeoutMS Timeout period within which the slave must respond, in milliseconds.
+ *
+ * \return A value from the \ref TWI_ErrorCodes_t enum.
+ */
+ uint8_t TWI_StartTransmission(TWI_t* const TWI,
+ const uint8_t SlaveAddress,
+ const uint8_t TimeoutMS) ATTR_NON_NULL_PTR_ARG(1);
+
+ /** Sends a byte to the currently addressed device on the TWI bus.
+ *
+ * \param[in] TWI Pointer to the base of the TWI peripheral within the device.
+ * \param[in] Byte Byte to send to the currently addressed device
+ *
+ * \return Boolean \c true if the recipient ACKed the byte, \c false otherwise
+ */
+ bool TWI_SendByte(TWI_t* const TWI,
+ const uint8_t Byte) ATTR_NON_NULL_PTR_ARG(1);
+
+ /** Receives a byte from the currently addressed device on the TWI bus.
+ *
+ * \param[in] TWI Pointer to the base of the TWI peripheral within the device.
+ * \param[in] Byte Location where the read byte is to be stored.
+ * \param[in] LastByte Indicates if the byte should be ACKed if false, NAKed if true.
+ *
+ * \return Boolean \c true if the byte reception successfully completed, \c false otherwise.
+ */
+ bool TWI_ReceiveByte(TWI_t* const TWI,
+ uint8_t* const Byte,
+ const bool LastByte) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
+
+ /** High level function to perform a complete packet transfer over the TWI bus to the specified
+ * device.
+ *
+ * \param[in] TWI Pointer to the base of the TWI peripheral within the device.
+ * \param[in] SlaveAddress Base address of the TWI slave device to communicate with.
+ * \param[in] TimeoutMS Timeout for bus capture and slave START ACK, in milliseconds.
+ * \param[in] InternalAddress Pointer to a location where the internal slave read start address is stored.
+ * \param[in] InternalAddressLen Size of the internal device address, in bytes.
+ * \param[in] Buffer Pointer to a buffer where the read packet data is to be stored.
+ * \param[in] Length Size of the packet to read, in bytes.
+ *
+ * \return A value from the \ref TWI_ErrorCodes_t enum.
+ */
+ uint8_t TWI_ReadPacket(TWI_t* const TWI,
+ const uint8_t SlaveAddress,
+ const uint8_t TimeoutMS,
+ const uint8_t* InternalAddress,
+ uint8_t InternalAddressLen,
+ uint8_t* Buffer,
+ uint16_t Length) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(4);
+
+ /** High level function to perform a complete packet transfer over the TWI bus from the specified
+ * device.
+ *
+ * \param[in] TWI Pointer to the base of the TWI peripheral within the device.
+ * \param[in] SlaveAddress Base address of the TWI slave device to communicate with
+ * \param[in] TimeoutMS Timeout for bus capture and slave START ACK, in milliseconds
+ * \param[in] InternalAddress Pointer to a location where the internal slave write start address is stored
+ * \param[in] InternalAddressLen Size of the internal device address, in bytes
+ * \param[in] Buffer Pointer to a buffer where the packet data to send is stored
+ * \param[in] Length Size of the packet to send, in bytes
+ *
+ * \return A value from the \ref TWI_ErrorCodes_t enum.
+ */
+ uint8_t TWI_WritePacket(TWI_t* const TWI,
+ const uint8_t SlaveAddress,
+ const uint8_t TimeoutMS,
+ const uint8_t* InternalAddress,
+ uint8_t InternalAddressLen,
+ const uint8_t* Buffer,
+ uint16_t Length) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(4);
+
+ /* Disable C linkage for C++ Compilers: */
+ #if defined(__cplusplus)
+ }
+ #endif
+
+#endif
+
+/** @} */
+