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-rw-r--r--LUFA/Drivers/Board/AVR8/EVK527/Dataflash.h1
-rw-r--r--LUFA/Drivers/Board/AVR8/STK525/Dataflash.h1
-rw-r--r--LUFA/Drivers/Board/AVR8/STK526/Dataflash.h1
-rw-r--r--LUFA/Drivers/Board/AVR8/USBKEY/Dataflash.h1
-rw-r--r--LUFA/Drivers/Board/AVR8/XPLAIN/Dataflash.h1
-rw-r--r--LUFA/Drivers/Board/Dataflash.h5
-rw-r--r--LUFA/Drivers/Board/XMEGA/A3BU_XPLAINED/Dataflash.h16
-rw-r--r--LUFA/Drivers/Board/XMEGA/B1_XPLAINED/Dataflash.h16
-rw-r--r--LUFA/Drivers/Peripheral/AVR8/SerialSPI_AVR8.h205
-rw-r--r--LUFA/Drivers/Peripheral/SerialSPI.h76
-rw-r--r--LUFA/Drivers/Peripheral/XMEGA/SerialSPI_XMEGA.h208
11 files changed, 507 insertions, 24 deletions
diff --git a/LUFA/Drivers/Board/AVR8/EVK527/Dataflash.h b/LUFA/Drivers/Board/AVR8/EVK527/Dataflash.h
index 007ef94ff..595492fe2 100644
--- a/LUFA/Drivers/Board/AVR8/EVK527/Dataflash.h
+++ b/LUFA/Drivers/Board/AVR8/EVK527/Dataflash.h
@@ -51,6 +51,7 @@
/* Includes: */
#include "../../../../Common/Common.h"
#include "../../../Misc/AT45DB321C.h"
+ #include "../../../Peripheral/SPI.h"
/* Preprocessor Checks: */
#if !defined(__INCLUDE_FROM_DATAFLASH_H)
diff --git a/LUFA/Drivers/Board/AVR8/STK525/Dataflash.h b/LUFA/Drivers/Board/AVR8/STK525/Dataflash.h
index c9d6477fa..67742977c 100644
--- a/LUFA/Drivers/Board/AVR8/STK525/Dataflash.h
+++ b/LUFA/Drivers/Board/AVR8/STK525/Dataflash.h
@@ -51,6 +51,7 @@
/* Includes: */
#include "../../../../Common/Common.h"
#include "../../../Misc/AT45DB321C.h"
+ #include "../../../Peripheral/SPI.h"
/* Preprocessor Checks: */
#if !defined(__INCLUDE_FROM_DATAFLASH_H)
diff --git a/LUFA/Drivers/Board/AVR8/STK526/Dataflash.h b/LUFA/Drivers/Board/AVR8/STK526/Dataflash.h
index ea4c0a021..ce20ff1e7 100644
--- a/LUFA/Drivers/Board/AVR8/STK526/Dataflash.h
+++ b/LUFA/Drivers/Board/AVR8/STK526/Dataflash.h
@@ -51,6 +51,7 @@
/* Includes: */
#include "../../../../Common/Common.h"
#include "../../../Misc/AT45DB642D.h"
+ #include "../../../Peripheral/SPI.h"
/* Preprocessor Checks: */
#if !defined(__INCLUDE_FROM_DATAFLASH_H)
diff --git a/LUFA/Drivers/Board/AVR8/USBKEY/Dataflash.h b/LUFA/Drivers/Board/AVR8/USBKEY/Dataflash.h
index 1e34a3953..5b71d7d88 100644
--- a/LUFA/Drivers/Board/AVR8/USBKEY/Dataflash.h
+++ b/LUFA/Drivers/Board/AVR8/USBKEY/Dataflash.h
@@ -51,6 +51,7 @@
/* Includes: */
#include "../../../../Common/Common.h"
#include "../../../Misc/AT45DB642D.h"
+ #include "../../../Peripheral/SPI.h"
/* Preprocessor Checks: */
#if !defined(__INCLUDE_FROM_DATAFLASH_H)
diff --git a/LUFA/Drivers/Board/AVR8/XPLAIN/Dataflash.h b/LUFA/Drivers/Board/AVR8/XPLAIN/Dataflash.h
index 62532ced1..c9bdbdc3a 100644
--- a/LUFA/Drivers/Board/AVR8/XPLAIN/Dataflash.h
+++ b/LUFA/Drivers/Board/AVR8/XPLAIN/Dataflash.h
@@ -60,6 +60,7 @@
/* Includes: */
#include "../../../../Common/Common.h"
#include "../../../Misc/AT45DB642D.h"
+ #include "../../../Peripheral/SPI.h"
/* Preprocessor Checks: */
#if !defined(__INCLUDE_FROM_DATAFLASH_H)
diff --git a/LUFA/Drivers/Board/Dataflash.h b/LUFA/Drivers/Board/Dataflash.h
index 2e1336bf6..a5ae29dc8 100644
--- a/LUFA/Drivers/Board/Dataflash.h
+++ b/LUFA/Drivers/Board/Dataflash.h
@@ -123,7 +123,6 @@
/* Includes: */
#include "../../Common/Common.h"
- #include "../Peripheral/SPI.h"
/* Enable C linkage for C++ Compilers: */
#if defined(__cplusplus)
@@ -148,7 +147,9 @@
/* Inline Functions: */
/** Initializes the dataflash driver so that commands and data may be sent to an attached dataflash IC.
*
- * \note The microcontroller's SPI driver must be initialized before any of the dataflash commands are used.
+ * \note The microcontroller's physical interface driver connected to the Dataflash IC must be initialized before
+ * any of the dataflash commands are used. This is usually a SPI hardware port, but on some devices/boards may
+ * be a USART operating in SPI Master mode.
*/
static inline void Dataflash_Init(void);
diff --git a/LUFA/Drivers/Board/XMEGA/A3BU_XPLAINED/Dataflash.h b/LUFA/Drivers/Board/XMEGA/A3BU_XPLAINED/Dataflash.h
index c263853ee..abc8d85d1 100644
--- a/LUFA/Drivers/Board/XMEGA/A3BU_XPLAINED/Dataflash.h
+++ b/LUFA/Drivers/Board/XMEGA/A3BU_XPLAINED/Dataflash.h
@@ -51,6 +51,7 @@
/* Includes: */
#include "../../../../Common/Common.h"
#include "../../../Misc/AT45DB642D.h"
+ #include "../../../Peripheral/SerialSPI.h"
/* Preprocessor Checks: */
#if !defined(__INCLUDE_FROM_DATAFLASH_H)
@@ -100,9 +101,7 @@
static inline uint8_t Dataflash_TransferByte(const uint8_t Byte) ATTR_ALWAYS_INLINE;
static inline uint8_t Dataflash_TransferByte(const uint8_t Byte)
{
- // TODO: USART in SPI mode on PORT D
- #warning The Dataflash driver for the selected board is currently incomplete and non-functional.
- return 0;
+ return SerialSPI_TransferByte(&USARTD0, Byte);
}
/** Sends a byte to the currently selected dataflash IC, and ignores the next byte from the dataflash.
@@ -112,7 +111,7 @@
static inline void Dataflash_SendByte(const uint8_t Byte) ATTR_ALWAYS_INLINE;
static inline void Dataflash_SendByte(const uint8_t Byte)
{
- return; // TODO
+ SerialSPI_SendByte(&USARTD0, Byte);
}
/** Sends a dummy byte to the currently selected dataflash IC, and returns the next byte from the dataflash.
@@ -122,7 +121,7 @@
static inline uint8_t Dataflash_ReceiveByte(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
static inline uint8_t Dataflash_ReceiveByte(void)
{
- return 0; // TODO
+ return SerialSPI_ReceiveByte(&USARTD0);
}
/** Determines the currently selected dataflash chip.
@@ -170,10 +169,7 @@
if (PageAddress >= (DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS))
return;
- if (PageAddress & 0x01)
- Dataflash_SelectChip(DATAFLASH_CHIP2);
- else
- Dataflash_SelectChip(DATAFLASH_CHIP1);
+ Dataflash_SelectChip(DATAFLASH_CHIP1);
}
/** Toggles the select line of the currently selected dataflash IC, so that it is ready to receive
@@ -207,8 +203,6 @@
static inline void Dataflash_SendAddressBytes(uint16_t PageAddress,
const uint16_t BufferByte)
{
- PageAddress >>= 1;
-
Dataflash_SendByte(PageAddress >> 5);
Dataflash_SendByte((PageAddress << 3) | (BufferByte >> 8));
Dataflash_SendByte(BufferByte);
diff --git a/LUFA/Drivers/Board/XMEGA/B1_XPLAINED/Dataflash.h b/LUFA/Drivers/Board/XMEGA/B1_XPLAINED/Dataflash.h
index 74a215b6c..e12f969e6 100644
--- a/LUFA/Drivers/Board/XMEGA/B1_XPLAINED/Dataflash.h
+++ b/LUFA/Drivers/Board/XMEGA/B1_XPLAINED/Dataflash.h
@@ -51,6 +51,7 @@
/* Includes: */
#include "../../../../Common/Common.h"
#include "../../../Misc/AT45DB642D.h"
+ #include "../../../Peripheral/SerialSPI.h"
/* Preprocessor Checks: */
#if !defined(__INCLUDE_FROM_DATAFLASH_H)
@@ -100,9 +101,7 @@
static inline uint8_t Dataflash_TransferByte(const uint8_t Byte) ATTR_ALWAYS_INLINE;
static inline uint8_t Dataflash_TransferByte(const uint8_t Byte)
{
- // TODO: USART in SPI mode on PORT C
- #warning The Dataflash driver for the selected board is currently incomplete and non-functional.
- return 0;
+ return SerialSPI_TransferByte(&USARTE0, Byte);
}
/** Sends a byte to the currently selected dataflash IC, and ignores the next byte from the dataflash.
@@ -112,7 +111,7 @@
static inline void Dataflash_SendByte(const uint8_t Byte) ATTR_ALWAYS_INLINE;
static inline void Dataflash_SendByte(const uint8_t Byte)
{
- return; // TODO
+ SerialSPI_SendByte(&USARTE0, Byte);
}
/** Sends a dummy byte to the currently selected dataflash IC, and returns the next byte from the dataflash.
@@ -122,7 +121,7 @@
static inline uint8_t Dataflash_ReceiveByte(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
static inline uint8_t Dataflash_ReceiveByte(void)
{
- return 0; // TODO
+ return SerialSPI_ReceiveByte(&USARTE0);
}
/** Determines the currently selected dataflash chip.
@@ -170,10 +169,7 @@
if (PageAddress >= (DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS))
return;
- if (PageAddress & 0x01)
- Dataflash_SelectChip(DATAFLASH_CHIP2);
- else
- Dataflash_SelectChip(DATAFLASH_CHIP1);
+ Dataflash_SelectChip(DATAFLASH_CHIP1);
}
/** Toggles the select line of the currently selected dataflash IC, so that it is ready to receive
@@ -207,8 +203,6 @@
static inline void Dataflash_SendAddressBytes(uint16_t PageAddress,
const uint16_t BufferByte)
{
- PageAddress >>= 1;
-
Dataflash_SendByte(PageAddress >> 5);
Dataflash_SendByte((PageAddress << 3) | (BufferByte >> 8));
Dataflash_SendByte(BufferByte);
diff --git a/LUFA/Drivers/Peripheral/AVR8/SerialSPI_AVR8.h b/LUFA/Drivers/Peripheral/AVR8/SerialSPI_AVR8.h
new file mode 100644
index 000000000..fe108e500
--- /dev/null
+++ b/LUFA/Drivers/Peripheral/AVR8/SerialSPI_AVR8.h
@@ -0,0 +1,205 @@
+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2012.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.lufa-lib.org
+*/
+
+/*
+ Copyright 2012 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 disclaim 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 Master SPI Mode 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_AVR8 Serial USART Peripheral Driver (AVR8)
+ *
+ * \section Sec_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
+ * 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);
+ *
+ * // Send several bytes, ignoring the returned data
+ * SerialSPI_SendByte(0x01);
+ * SerialSPI_SendByte(0x02);
+ * SerialSPI_SendByte(0x03);
+ *
+ * // Receive several bytes, sending a dummy 0x00 byte each time
+ * uint8_t Byte1 = SerialSPI_ReceiveByte();
+ * uint8_t Byte2 = SerialSPI_ReceiveByte();
+ * uint8_t Byte3 = SerialSPI_ReceiveByte();
+ *
+ * // Send a byte, and store the received byte from the same transaction
+ * uint8_t ResponseByte = SerialSPI_TransferByte(0xDC);
+ * \endcode
+ *
+ * @{
+ */
+
+#ifndef __SERIAL_SPI_AVR8_H__
+#define __SERIAL_SPI_AVR8_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 \c SPI_Init(). Indicates that the SCK should lead on the rising edge. */
+ #define USART_SPI_SCK_LEAD_RISING (0 << UCPOL)
+
+ /** SPI clock polarity mask for \c SPI_Init(). Indicates that the SCK should lead on the falling edge. */
+ #define USART_SPI_SCK_LEAD_FALLING (1 << UCPOL)
+ //@}
+
+ /** \name SPI Sample Edge Configuration Masks */
+ //@{
+ /** SPI data sample mode mask for \c SerialSPI_Init(). Indicates that the data should sampled on the leading edge. */
+ #define USART_SPI_SAMPLE_LEADING (0 << UPCHA)
+
+ /** SPI data sample mode mask for \c SerialSPI_Init(). Indicates that the data should be sampled on the trailing edge. */
+ #define USART_SPI_SAMPLE_TRAILING (1 << UPCHA)
+ //@}
+
+ /** \name SPI Data Ordering Configuration Masks */
+ //@{
+ /** SPI data order mask for \c Serial_SPIInit(). Indicates that data should be shifted out MSB first. */
+ #define USART_SPI_ORDER_MSB_FIRST (0 << UDORD)
+
+ /** SPI data order mask for \c Serial_SPIInit(). Indicates that data should be shifted out LSB first. */
+ #define USART_SPI_ORDER_LSB_FIRST (1 << UDORD)
+ //@}
+
+ /* Inline Functions: */
+ /** 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.
+ * \param[in] BaudRate SPI baud rate, in bits per second.
+ */
+ static inline void SerialSPI_Init(const uint8_t SPIOptions,
+ const uint32_t BaudRate)
+ {
+ UBRR1 = SERIAL_SPI_UBBRVAL(BaudRate);
+
+ UCSR1C = ((1 << UMSEL11) | (1 << UMSEL10) | SPIOptions);
+ UCSR1B = ((1 << TXEN1) | (1 << RXEN1));
+
+ DDRD |= (1 << 3);
+ PORTD |= (1 << 2);
+ }
+
+ /** Turns off the USART driver, disabling and returning used hardware to their default configuration. */
+ static inline void SerialSPI_Disable(void)
+ {
+ UCSR1B = 0;
+ UCSR1A = 0;
+ UCSR1C = 0;
+
+ UBRR1 = 0;
+
+ DDRD &= ~(1 << 3);
+ 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.
+ *
+ * \return Response byte from the attached SPI device.
+ */
+ static inline uint8_t SerialSPI_TransferByte(const uint8_t DataByte)
+ {
+ UDR1 = DataByte;
+ while (!(UCSR1A & (1 << TXC1)));
+ UCSR1A = (1 << TXC1);
+ return UDR1;
+ }
+
+ /** 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] 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);
+ }
+
+ /** 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.
+ *
+ * \return The response byte from the attached SPI device.
+ */
+ static inline uint8_t SerialSPI_ReceiveByte(void)
+ {
+ UDR1 = 0;
+ while (!(UCSR1A & (1 << TXC1)));
+ UCSR1A = (1 << TXC1);
+ return UDR1;
+ }
+
+ /* Disable C linkage for C++ Compilers: */
+ #if defined(__cplusplus)
+ }
+ #endif
+
+#endif
+
+/** @} */
+
diff --git a/LUFA/Drivers/Peripheral/SerialSPI.h b/LUFA/Drivers/Peripheral/SerialSPI.h
new file mode 100644
index 000000000..f5eede842
--- /dev/null
+++ b/LUFA/Drivers/Peripheral/SerialSPI.h
@@ -0,0 +1,76 @@
+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2012.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.lufa-lib.org
+*/
+
+/*
+ Copyright 2012 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 disclaim 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 Hardware SPI Master Mode Serial USART driver.
+ *
+ * This file is the master dispatch header file for the device-specific SPI Master Mode USART driver, for
+ * microcontrollers containing a hardware USART capable of operating in a Master SPI mode.
+ *
+ * User code should include this file, which will in turn include the correct ADC driver header file for the
+ * currently selected architecture and microcontroller model.
+ */
+
+/** \ingroup Group_PeripheralDrivers
+ * \defgroup Group_SerialSPI Master SPI Mode Serial USART Driver - LUFA/Drivers/Peripheral/SerialSPI.h
+ * \brief Hardware SPI Master Mode Serial USART driver.
+ *
+ * \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
+ * Hardware SPI Master Mode serial USART driver. This module provides an easy to use driver for the setup and transfer
+ * of data over the selected architecture and microcontroller model's USART port, using a SPI framing format.
+ *
+ * \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 __SERIAL_SPI_H__
+#define __SERIAL_SPI_H__
+
+ /* Macros: */
+ #define __INCLUDE_FROM_SERIAL_SPI_H
+
+ /* Includes: */
+ #include "../../Common/Common.h"
+
+ /* Includes: */
+ #if (ARCH == ARCH_AVR8)
+ #include "AVR8/SerialSPI_AVR8.h"
+ #elif (ARCH == ARCH_XMEGA)
+ #include "XMEGA/SerialSPI_XMEGA.h"
+ #else
+ #error The Serial SPI Master Mode peripheral driver is not currently available for your selected architecture.
+ #endif
+
+#endif
+
diff --git a/LUFA/Drivers/Peripheral/XMEGA/SerialSPI_XMEGA.h b/LUFA/Drivers/Peripheral/XMEGA/SerialSPI_XMEGA.h
new file mode 100644
index 000000000..7d1e6c1f3
--- /dev/null
+++ b/LUFA/Drivers/Peripheral/XMEGA/SerialSPI_XMEGA.h
@@ -0,0 +1,208 @@
+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2012.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.lufa-lib.org
+*/
+
+/*
+ Copyright 2012 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 disclaim 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 Master SPI Mode 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 Serial USART Peripheral Driver (XMEGA)
+ *
+ * \section Sec_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
+ * 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(&USARTD, (USART_SPI_SCK_LEAD_RISING | SPI_SAMPLE_LEADING | SPI_ORDER_MSB_FIRST), 1000000);
+ *
+ * // Send several bytes, ignoring the returned data
+ * SerialSPI_SendByte(&USARTD, 0x01);
+ * SerialSPI_SendByte(&USARTD, 0x02);
+ * SerialSPI_SendByte(&USARTD, 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(&USARTD, 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 \c 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 \c SerialSPI_Init(). Indicates that the data should sampled on the leading edge. */
+ #define USART_SPI_SAMPLE_LEADING 0
+
+ /** SPI data sample mode mask for \c SerialSPI_Init(). Indicates that the data should be sampled on the trailing edge. */
+ #define USART_SPI_SAMPLE_TRAILING USART_UPCHA_bm
+ //@}
+
+ /** \name SPI Data Ordering Configuration Masks */
+ //@{
+ /** SPI data order mask for \c Serial_SPIInit(). Indicates that data should be shifted out MSB first. */
+ #define USART_SPI_ORDER_MSB_FIRST 0
+
+ /** SPI data order mask for \c Serial_SPIInit(). Indicates that data should be shifted out LSB first. */
+ #define USART_SPI_ORDER_LSB_FIRST USART_UDORD_bm
+ //@}
+
+ /* 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)
+ {
+ 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)
+ {
+ 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)
+ {
+ 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)
+ {
+ USART->DATA = DataByte;
+ while (!(USART->STATUS & USART_TXCIF_bm));
+ USART->STATUS = USART_TXCIF_bm;
+ }
+
+ /** 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)
+ {
+ USART->DATA = 0;
+ while (!(USART->STATUS & USART_TXCIF_bm));
+ USART->STATUS = USART_TXCIF_bm;
+ return USART->DATA;
+ }
+
+ /* Disable C linkage for C++ Compilers: */
+ #if defined(__cplusplus)
+ }
+ #endif
+
+#endif
+
+/** @} */
+
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