diff --git a/boards/arduino-due/Makefile b/boards/arduino-due/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..64c99412f3706043de74408d8c809fb708e76de6
--- /dev/null
+++ b/boards/arduino-due/Makefile
@@ -0,0 +1,16 @@
+
+# tell the Makefile.base which module to build
+MODULE = $(BOARD)_base
+
+# add a list of board specific subdirectories that should also be build
+DIRS =
+
+.PHONY: all clean
+
+all: $(BINDIR)$(MODULE).a
+ @for i in $(DIRS) ; do $(MAKE) -C $$i ; done ;
+
+include $(RIOTBASE)/Makefile.base
+
+clean::
+ @for i in $(DIRS) ; do $(MAKE) -C $$i clean ; done ;
diff --git a/boards/arduino-due/Makefile.include b/boards/arduino-due/Makefile.include
new file mode 100644
index 0000000000000000000000000000000000000000..9596c37a02737ea19a0a0035ab2cc55d849fe658
--- /dev/null
+++ b/boards/arduino-due/Makefile.include
@@ -0,0 +1,48 @@
+
+# define the cpu used by the arduino due board
+export CPU = sam3x8e
+
+# define tools used for building the project
+export PREFIX = arm-none-eabi-
+export CC = $(PREFIX)gcc
+export AR = $(PREFIX)ar
+export AS = $(PREFIX)as
+export LINK = $(PREFIX)gcc
+export SIZE = $(PREFIX)size
+export OBJCOPY = $(PREFIX)objcopy
+export TERMPROG = $(RIOTBASE)/dist/tools/pyterm/pyterm.py
+
+#define the flash-tool and default port depending on the host operating system
+OS = $(shell uname)
+ifeq ($(OS),Linux)
+ PORT ?= /dev/ttyACM0
+ FLASHER = stty -F $(PORT) raw ispeed 1200 ospeed 1200 cs8 -cstopb ignpar eol 255 eof 255; $(RIOTBOARD)/$(BOARD)/dist/bossac
+else ifeq ($(OS),Darwin)
+ PORT ?= $(shell ls -1 /dev/tty.usbmodem* | head -n 1)
+ FLASHER = stty -f $(PORT) raw ispeed 1200 ospeed 1200 cs8 -cstopb ignpar eol 255 eof 255; $(RIOTBOARD)/$(BOARD)/dist/bossac_osx
+else
+ $(info CAUTION: No flash tool for your host system found!)
+ # TODO: fix for building under windows
+endif
+export FLASHER
+export PORT
+
+# define build specific options
+export CPU_USAGE = -mcpu=cortex-m3
+export CFLAGS += -ggdb -g3 -std=gnu99 -Os -Wall -Wstrict-prototypes $(CPU_USAGE) -mlittle-endian -mthumb -mthumb-interwork -nostartfiles
+export CFLAGS += -DREENTRANT_SYSCALLS_PROVIDED
+export ASFLAGS += -ggdb -g3 -mcpu=cortex-m4 $(FPU_USAGE) -mlittle-endian
+export LINKFLAGS += -g3 -ggdb -std=gnu99 $(CPU_USAGE) $(FPU_USAGE) -mlittle-endian -static -lgcc -mthumb -mthumb-interwork -nostartfiles
+# linkerscript specified in cpu/Makefile.include
+export LINKFLAGS += -T$(LINKERSCRIPT)
+export OFLAGS += -O binary
+export FFLAGS += -e -w -v -b bin/$(BOARD)/$(PROJECT).hex
+
+# additional compiler and linker flags to enable newlib-nano and optimize for it
+# CAREFUL: newlib-nano is not supported by the ubuntu arm-none-eabi- toolchain, so its disabled by default
+#export CFLAGS += -flto -ffunction-sections -fdata-sections -fno-builtin
+#export LINKFLAGS += -specs=nano.specs -lc -lnosys
+
+
+# export board specific includes to the global includes-listing
+export INCLUDES += -I$(RIOTBOARD)/$(BOARD)/include
diff --git a/boards/arduino-due/board.c b/boards/arduino-due/board.c
new file mode 100644
index 0000000000000000000000000000000000000000..f3582b950a4880587cb847480b8f16741ac6b812
--- /dev/null
+++ b/boards/arduino-due/board.c
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2014 Freie Universität Berlin
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License. See the file LICENSE in the top level directory for more
+ * details.
+ */
+
+/**
+ * @ingroup board_arduino-due
+ * @{
+ *
+ * @file board.c
+ * @brief Board specific implementations for the Arduino Due board
+ *
+ * @author Hauke Petersen <hauke.petersen@fu-berlin.de>
+ *
+ * @}
+ */
+
+#include <stdio.h>
+
+#include "board.h"
+#include "cpu.h"
+
+
+void led_init(void);
+
+
+void board_init(void)
+{
+ /* initialize core clocks via CMSIS function provided by Atmel */
+ SystemInit();
+
+ /* initialize the CPU */
+ cpu_init();
+
+ /* initialize the boards LEDs */
+ led_init();
+}
+
+
+/**
+ * @brief Initialize the boards on-board LED (Amber LED "L")
+ *
+ * The LED initialization is hard-coded in this function. As the LED is soldered
+ * onto the board it is fixed to its CPU pins.
+ *
+ * The LED is connected to the following pin:
+ * - LED: PB27
+ */
+void led_init(void)
+{
+ /* enable PIO control of pin PD27 */
+ LED_PORT->PIO_PER = LED_PIN;
+ /* set pin as output */
+ LED_PORT->PIO_OER = LED_PIN;
+ /* enable direct write access to the LED pin */
+ LED_PORT->PIO_OWER = LED_PIN;
+ /* disable pull-up */
+ LED_PORT->PIO_PUDR = LED_PIN;
+ /* clear pin */
+ LED_PORT->PIO_CODR = LED_PIN;
+}
diff --git a/boards/arduino-due/dist/bossac b/boards/arduino-due/dist/bossac
new file mode 100755
index 0000000000000000000000000000000000000000..573e7d9e7716acf1d885f88da3f523cce67cb0da
Binary files /dev/null and b/boards/arduino-due/dist/bossac differ
diff --git a/boards/arduino-due/dist/bossac_osx b/boards/arduino-due/dist/bossac_osx
new file mode 100755
index 0000000000000000000000000000000000000000..49a20b38a92e713bcc25b15de464642bc257220b
Binary files /dev/null and b/boards/arduino-due/dist/bossac_osx differ
diff --git a/boards/arduino-due/include/board.h b/boards/arduino-due/include/board.h
new file mode 100644
index 0000000000000000000000000000000000000000..f30cce56620a38f1cf1c4a51b9b8df4337ffc64f
--- /dev/null
+++ b/boards/arduino-due/include/board.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2014 Freie Universität Berlin
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License. See the file LICENSE in the top level directory for more
+ * details.
+ */
+
+/**
+ * @defgroup board_arduino-due Arduino Due
+ * @ingroup boards
+ * @brief Board specific files for the Arduino Due board.
+ * @{
+ *
+ * @file board.h
+ * @brief Board specific definitions for the Arduino Due board.
+ *
+ * @author Hauke Petersen <hauke.petersen@fu-berlin.de>
+ */
+
+#ifndef __BOARD_H
+#define __BOARD_H
+
+#include "cpu.h"
+
+/**
+ * Define the nominal CPU core clock in this board
+ */
+#define F_CPU (84000000UL)
+
+
+/**
+ * Assign the hardware timer
+ */
+#define HW_TIMER TIMER_0
+
+/**
+ * @name LED pin definitions
+ * @{
+ */
+#define LED_PORT PIOB
+#define LED_PIN PIO_PB27
+/** @} */
+
+/**
+ * @name Macros for controlling the on-board LEDs.
+ * @{
+ */
+#define LED_ON LED_PORT->PIO_ODSR |= LED_PIN
+#define LED_OFF LED_PORT->PIO_ODSR &= ~LED_PIN
+#define LED_TOGGLE LED_PORT->PIO_ODSR ^= LED_PIN;
+
+/* for compatability to other boards */
+#define LED_GREEN_ON LED_ON
+#define LED_GREEN_OFF LED_OFF
+#define LED_GREEN_TOGGLE LED_TOGGLE
+#define LED_RED_ON /* not available */
+#define LED_RED_OFF /* not available */
+#define LED_RED_TOGGLE /* not available */
+/** @} */
+
+
+/**
+ * @brief Initialize board specific hardware, including clock, LEDs and std-IO
+ */
+void board_init(void);
+
+
+#endif /** __BOARD_H */
+/** @} */
diff --git a/boards/arduino-due/include/periph_conf.h b/boards/arduino-due/include/periph_conf.h
new file mode 100644
index 0000000000000000000000000000000000000000..3e0022df3deb620580f31e2ed0ead68ed1225486
--- /dev/null
+++ b/boards/arduino-due/include/periph_conf.h
@@ -0,0 +1,337 @@
+/*
+ * Copyright (C) 2014 Freie Universität Berlin
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License. See the file LICENSE in the top level directory for more
+ * details.
+ */
+
+/**
+ * @ingroup board_arduino-due
+ * @{
+ *
+ * @file periph_conf.h
+ * @brief Peripheral MCU configuration for the Arduino Due board
+ *
+ * @author Hauke Petersen <hauke.petersen@fu-berlin.de>
+ */
+
+#ifndef __PERIPH_CONF_H
+#define __PERIPH_CONF_H
+
+
+/**
+ * @name Timer peripheral configuration
+ * @{
+ */
+#define TIMER_NUMOF (3U)
+#define TIMER_0_EN 1
+#define TIMER_1_EN 1
+#define TIMER_2_EN 1
+
+/* Timer 0 configuration */
+#define TIMER_0_DEV TC0
+#define TIMER_0_CHANNELS 6
+#define TIMER_0_MAX_VALUE (0xffffffff)
+#define TIMER_0_ISR1 isr_tc0
+#define TIMER_0_ISR2 isr_tc1
+
+/* Timer 1 configuration */
+#define TIMER_1_DEV TC1
+#define TIMER_1_CHANNELS 6
+#define TIMER_1_MAX_VALUE (0xffffffff)
+#define TIMER_1_ISR1 isr_tc3
+#define TIMER_1_ISR2 isr_tc4
+
+/* Timer 2 configuration */
+#define TIMER_2_DEV TC2
+#define TIMER_2_CHANNELS 6
+#define TIMER_2_MAX_VALUE (0xffffffff)
+#define TIMER_2_ISR1 isr_tc6
+#define TIMER_2_ISR2 isr_tc7
+/** @} */
+
+/**
+ * @name UART configuration
+ * @{
+ */
+#define UART_NUMOF (1U)
+#define UART_0_EN 1
+#define UART_1_EN 0
+#define UART_2_EN 0
+#define UART_3_EN 0
+#define UART_IRQ_PRIO 1
+
+/* UART 0 device configuration */
+#define UART_0_DEV UART
+#define UART_0_IRQ UART_IRQn
+#define UART_0_ISR isr_uart
+/* UART 0 pin configuration */
+#define UART_0_PORT PIOA
+#define UART_0_PINS (PIO_PA8 | PIO_PA9)
+#define UART_0_PORT_CLKEN() RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE)
+#define UART_0_RX_AFCFG() (GPIO_PinAFConfig(UART_0_PORT, GPIO_PinSource6, GPIO_AF_0))
+#define UART_0_TX_AFCFG() (GPIO_PinAFConfig(UART_0_PORT, GPIO_PinSource7, GPIO_AF_0))
+
+/* UART 1 device configuration */
+#define UART_1_DEV USART2
+#define UART_1_CLKEN() RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART2, ENABLE)
+#define UART_1_IRQ USART2_IRQn
+#define UART_1_ISR isr_usart2
+/* UART 1 pin configuration */
+#define UART_1_PORT GPIOA
+#define UART_1_PINS (GPIO_Pin_2 | GPIO_Pin_3)
+#define UART_1_PORT_CLKEN() RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE)
+#define UART_1_RX_AFCFG() GPIO_PinAFConfig(UART_1_PORT, GPIO_PinSource2, GPIO_AF_1)
+#define UART_1_TX_AFCFG() GPIO_PinAFConfig(UART_1_PORT, GPIO_PinSource3, GPIO_AF_1)
+/** @} */
+
+
+/**
+ * @brief ADC configuration
+ */
+#define ADC_NUMOF (0U)
+#define ADC_0_EN 0
+#define ADC_1_EN 0
+
+/* ADC 0 configuration */
+#define ADC_0_DEV ADC1 /* TODO */
+#define ADC_0_SAMPLE_TIMER
+/* ADC 0 channel 0 pin config */
+#define ADC_0_C0_PORT
+#define ADC_0_C0_PIN
+#define ADC_0_C0_CLKEN()
+#define ADC_0_C0_AFCFG()
+/* ADC 0 channel 1 pin config */
+#define ADC_0_C1_PORT
+#define ADC_0_C1_PIN
+#define ADC_0_C1_CLKEN()
+#define ADC_0_C1_AFCFG()
+/* ADC 0 channel 2 pin config */
+#define ADC_0_C2_PORT
+#define ADC_0_C2_PIN
+#define ADC_0_C2_CLKEN()
+#define ADC_0_C2_AFCFG()
+/* ADC 0 channel 3 pin config */
+#define ADC_0_C3_PORT
+#define ADC_0_C3_PIN
+#define ADC_0_C3_CLKEN()
+#define ADC_0_C3_AFCFG()
+
+/* ADC 0 configuration */
+#define ADC_1_DEV ADC2 /* TODO */
+#define ADC_1_SAMPLE_TIMER
+/* ADC 0 channel 0 pin config */
+#define ADC_1_C0_PORT
+#define ADC_1_C0_PIN
+#define ADC_1_C0_CLKEN()
+#define ADC_1_C0_AFCFG()
+/* ADC 0 channel 1 pin config */
+#define ADC_1_C1_PORT
+#define ADC_1_C1_PIN
+#define ADC_1_C1_CLKEN()
+#define ADC_1_C1_AFCFG()
+/* ADC 0 channel 2 pin config */
+#define ADC_1_C2_PORT
+#define ADC_1_C2_PIN
+#define ADC_1_C2_CLKEN()
+#define ADC_1_C2_AFCFG()
+/* ADC 0 channel 3 pin config */
+#define ADC_1_C3_PORT
+#define ADC_1_C3_PIN
+#define ADC_1_C3_CLKEN()
+#define ADC_1_C3_AFCFG()
+
+
+/**
+ * @brief PWM configuration
+ */
+#define PWM_NUMOF (0U) /* TODO */
+#define PWM_0_EN 0
+#define PWM_1_EN 0
+
+/* PWM 0 device configuration */
+#define PWM_0_DEV TIM1
+#define PWM_0_CHANNELS 4
+/* PWM 0 pin configuration */
+#define PWM_0_PORT
+#define PWM_0_PINS
+#define PWM_0_PORT_CLKEN()
+#define PWM_0_CH1_AFCFG()
+#define PWM_0_CH2_AFCFG()
+#define PWM_0_CH3_AFCFG()
+#define PWM_0_CH4_AFCFG()
+
+/* PWM 1 device configuration */
+#define PWM_1_DEV TIM3
+#define PWM_1_CHANNELS 4
+/* PWM 1 pin configuration */
+#define PWM_1_PORT
+#define PWM_1_PINS
+#define PWM_1_PORT_CLKEN()
+#define PWM_1_CH1_AFCFG()
+#define PWM_1_CH2_AFCFG()
+#define PWM_1_CH3_AFCFG()
+#define PWM_1_CH4_AFCFG()
+
+
+
+/**
+ * @brief SPI configuration
+ */
+#define SPI_NUMOF (0U) /* TODO */
+#define SPI_0_EN 0
+#define SPI_1_EN 0
+
+/* SPI 0 device config */
+#define SPI_0_DEV SPI1
+#define SPI_0_CLKEN()
+#define SPI_0_IRQ SPI1_IRQn
+#define SPI_0_IRQ_HANDLER
+#define SPI_0_IRQ_PRIO 1
+/* SPI 1 pin configuration */
+#define SPI_0_PORT
+#define SPI_0_PINS ()
+#define SPI_1_PORT_CLKEN()
+#define SPI_1_SCK_AFCFG()
+#define SPI_1_MISO_AFCFG()
+#define SPI_1_MOSI_AFCFG()
+
+/* SPI 1 device config */
+#define SPI_1_DEV SPI2
+#define SPI_1_CLKEN()
+#define SPI_1_IRQ SPI2_IRQn
+#define SPI_1_IRQ_HANDLER
+#define SPI_1_IRQ_PRIO 1
+/* SPI 1 pin configuration */
+#define SPI_1_PORT
+#define SPI_1_PINS ()
+#define SPI_1_PORT_CLKEN()
+#define SPI_1_SCK_AFCFG()
+#define SPI_1_MISO_AFCFG()
+#define SPI_1_MOSI_AFCFG()
+
+
+/**
+ * @brief I2C configuration
+ */
+#define I2C_NUMOF (0U) /* TODO */
+#define I2C_0_EN 0
+#define I2C_0_EN 0
+
+/* SPI 0 device configuration */
+#define I2C_0_DEV I2C1
+#define I2C_0_CLKEN()
+#define I2C_0_ISR isr_i2c1
+#define I2C_0_IRQ I2C1_IRQn
+#define I2C_0_IRQ_PRIO 1
+/* SPI 0 pin configuration */
+#define I2C_0_PORT GPIOB
+#define I2C_0_PINS (GPIO_Pin_6 | GPIO_Pin_7)
+#define I2C_0_PORT_CLKEN()
+#define I2C_0_SCL_AFCFG()
+#define I2C_0_SDA_AFCFG()
+
+/* SPI 1 device configuration */
+#define I2C_1_DEV I2C2
+#define I2C_1_CLKEN()
+#define I2C_1_ISR isr_i2c2
+#define I2C_1_IRQ I2C2_IRQn
+#define I2C_1_IRQ_PRIO 1
+/* SPI 1 pin configuration */
+#define I2C_1_PORT GPIOF
+#define I2C_1_PINS (GPIO_Pin_0 | GPIO_Pin_1)
+#define I2C_1_PORT_CLKEN()
+#define I2C_1_SCL_AFCFG()
+#define I2C_1_SDA_AFCFG()
+
+
+/**
+ * @brief GPIO configuration
+ */
+#define GPIO_NUMOF (15U)
+#define GPIO_0_EN 1
+#define GPIO_1_EN 1
+#define GPIO_2_EN 1
+#define GPIO_3_EN 1
+#define GPIO_4_EN 1
+#define GPIO_5_EN 1
+#define GPIO_6_EN 1
+#define GPIO_7_EN 1
+#define GPIO_8_EN 1
+#define GPIO_9_EN 1
+#define GPIO_10_EN 1
+#define GPIO_11_EN 1
+#define GPIO_12_EN 1
+#define GPIO_13_EN 1
+#define GPIO_14_EN 1
+#define GPIO_15_EN 1
+
+/* IRQ config */
+/* #define GPIO_IRQ_0 GPIO_0 */
+/* #define GPIO_IRQ_1 GPIO_1 */
+/* #define GPIO_IRQ_2 // not configured */
+/* #define GPIO_IRQ_3 // not configured */
+/* #define GPIO_IRQ_4 GPIO_2 */
+/* #define GPIO_IRQ_5 GPIO_3 */
+/* #define GPIO_IRQ_6 GPIO_4 */
+/* #define GPIO_IRQ_7 GPIO_5 */
+/* #define GPIO_IRQ_8 // not configured */
+/* #define GPIO_IRQ_9 // not configured */
+/* #define GPIO_IRQ_10 GPIO_6 */
+/* #define GPIO_IRQ_11 GPIO_7 */
+/* #define GPIO_IRQ_12 GPIO_8 */
+/* #define GPIO_IRQ_13 GPIO_9 */
+/* #define GPIO_IRQ_14 GPIO_10 */
+/* #define GPIO_IRQ_15 GPIO_11 */
+
+/* GPIO channel 0 config */
+#define GPIO_0_DEV PIOA
+#define GPIO_0_PIN PIO_PA14
+/* GPIO channel 1 config */
+#define GPIO_1_DEV PIOD
+#define GPIO_1_PIN PIO_PD0
+/* GPIO channel 2 config */
+#define GPIO_2_DEV PIOD
+#define GPIO_2_PIN PIO_PD2
+/* GPIO channel 3 config */
+#define GPIO_3_DEV PIOD
+#define GPIO_3_PIN PIO_PD6
+/* GPIO channel 4 config */
+#define GPIO_4_DEV PIOA
+#define GPIO_4_PIN PIO_PA7
+/* GPIO channel 5 config */
+#define GPIO_5_DEV PIOC
+#define GPIO_5_PIN PIO_PC1
+/* GPIO channel 6 config */
+#define GPIO_6_DEV PIOC
+#define GPIO_6_PIN PIO_PC3
+/* GPIO channel 7 config */
+#define GPIO_7_DEV PIOC
+#define GPIO_7_PIN PIO_PC5
+/* GPIO channel 8 config */
+#define GPIO_8_DEV PIOC
+#define GPIO_8_PIN PIO_PC7
+/* GPIO channel 9 config */
+#define GPIO_9_DEV PIOC
+#define GPIO_9_PIN PIO_PC9
+/* GPIO channel 10 config */
+#define GPIO_10_DEV PIOA
+#define GPIO_10_PIN PIO_PA20
+/* GPIO channel 11 config */
+#define GPIO_11_DEV PIOC
+#define GPIO_11_PIN PIO_PC18
+/* GPIO channel 12 config */
+#define GPIO_12_DEV PIOC
+#define GPIO_12_PIN PIO_PC16
+/* GPIO channel 13 config */
+#define GPIO_13_DEV PIOC
+#define GPIO_13_PIN PIO_PC14
+/* GPIO channel 14 config */
+#define GPIO_14_DEV PIOC
+#define GPIO_14_PIN PIO_PC12
+/* GPIO channel 15 config */
+#define GPIO_15_DEV PIOB
+#define GPIO_15_PIN PIO_PB14
+
+#endif /* __PERIPH_CONF_H */
diff --git a/boards/arduino-due/system_sam3xa.c b/boards/arduino-due/system_sam3xa.c
new file mode 100644
index 0000000000000000000000000000000000000000..9f2e6c5b32a570415c73c5cac7ad823275037242
--- /dev/null
+++ b/boards/arduino-due/system_sam3xa.c
@@ -0,0 +1,215 @@
+/*! \file *********************************************************************
+ *
+ * \brief Provides the low-level initialization functions that called
+ * on chip startup.
+ *
+ * Copyright (c) 2012, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following condition is met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * \asf_license_stop
+ *
+ * \par Purpose
+ *
+ * This file provides basic support for Cortex-M processor based
+ * microcontrollers.
+ *
+ * \author Atmel Corporation: http://www.atmel.com \n
+ * Support and FAQ: http://support.atmel.no/
+ *
+ ******************************************************************************/
+
+#include "sam3x8e.h"
+
+/* @cond 0 */
+/**INDENT-OFF**/
+#ifdef __cplusplus
+extern "C" {
+#endif
+/**INDENT-ON**/
+/* @endcond */
+
+/* Clock settings (84MHz) */
+#define SYS_BOARD_OSCOUNT (CKGR_MOR_MOSCXTST(0x8))
+#define SYS_BOARD_PLLAR (CKGR_PLLAR_ONE \
+ | CKGR_PLLAR_MULA(0xdUL) \
+ | CKGR_PLLAR_PLLACOUNT(0x3fUL) \
+ | CKGR_PLLAR_DIVA(0x1UL))
+#define SYS_BOARD_MCKR (PMC_MCKR_PRES_CLK_2 | PMC_MCKR_CSS_PLLA_CLK)
+
+/* Clock Definitions */
+#define SYS_UTMIPLL (480000000UL) /* UTMI PLL frequency */
+
+#define SYS_CKGR_MOR_KEY_VALUE CKGR_MOR_KEY(0x37) /* Key to unlock MOR register */
+
+/* FIXME: should be generated by sock */
+uint32_t SystemCoreClock = CHIP_FREQ_MAINCK_RC_4MHZ;
+
+/**
+ * \brief Setup the microcontroller system.
+ * Initialize the System and update the SystemFrequency variable.
+ */
+void SystemInit(void)
+{
+ /* Set FWS according to SYS_BOARD_MCKR configuration */
+ EFC0->EEFC_FMR = EEFC_FMR_FWS(4);
+ EFC1->EEFC_FMR = EEFC_FMR_FWS(4);
+
+ /* Initialize main oscillator */
+ if (!(PMC->CKGR_MOR & CKGR_MOR_MOSCSEL)) {
+ PMC->CKGR_MOR = SYS_CKGR_MOR_KEY_VALUE | SYS_BOARD_OSCOUNT |
+ CKGR_MOR_MOSCRCEN | CKGR_MOR_MOSCXTEN;
+ while (!(PMC->PMC_SR & PMC_SR_MOSCXTS)) {
+ }
+ }
+
+ /* Switch to 3-20MHz Xtal oscillator */
+ PMC->CKGR_MOR = SYS_CKGR_MOR_KEY_VALUE | SYS_BOARD_OSCOUNT |
+ CKGR_MOR_MOSCRCEN | CKGR_MOR_MOSCXTEN | CKGR_MOR_MOSCSEL;
+
+ while (!(PMC->PMC_SR & PMC_SR_MOSCSELS)) {
+ }
+ PMC->PMC_MCKR = (PMC->PMC_MCKR & ~(uint32_t)PMC_MCKR_CSS_Msk) |
+ PMC_MCKR_CSS_MAIN_CLK;
+ while (!(PMC->PMC_SR & PMC_SR_MCKRDY)) {
+ }
+
+ /* Initialize PLLA */
+ PMC->CKGR_PLLAR = SYS_BOARD_PLLAR;
+ while (!(PMC->PMC_SR & PMC_SR_LOCKA)) {
+ }
+
+ /* Switch to main clock */
+ PMC->PMC_MCKR = (SYS_BOARD_MCKR & ~PMC_MCKR_CSS_Msk) | PMC_MCKR_CSS_MAIN_CLK;
+ while (!(PMC->PMC_SR & PMC_SR_MCKRDY)) {
+ }
+
+ /* Switch to PLLA */
+ PMC->PMC_MCKR = SYS_BOARD_MCKR;
+ while (!(PMC->PMC_SR & PMC_SR_MCKRDY)) {
+ }
+
+ SystemCoreClock = CHIP_FREQ_CPU_MAX;
+}
+
+void SystemCoreClockUpdate(void)
+{
+ /* Determine clock frequency according to clock register values */
+ switch (PMC->PMC_MCKR & PMC_MCKR_CSS_Msk) {
+ case PMC_MCKR_CSS_SLOW_CLK: /* Slow clock */
+ if (SUPC->SUPC_SR & SUPC_SR_OSCSEL) {
+ SystemCoreClock = CHIP_FREQ_XTAL_32K;
+ } else {
+ SystemCoreClock = CHIP_FREQ_SLCK_RC;
+ }
+ break;
+ case PMC_MCKR_CSS_MAIN_CLK: /* Main clock */
+ if (PMC->CKGR_MOR & CKGR_MOR_MOSCSEL) {
+ SystemCoreClock = CHIP_FREQ_XTAL_12M;
+ } else {
+ SystemCoreClock = CHIP_FREQ_MAINCK_RC_4MHZ;
+
+ switch (PMC->CKGR_MOR & CKGR_MOR_MOSCRCF_Msk) {
+ case CKGR_MOR_MOSCRCF_4_MHz:
+ break;
+ case CKGR_MOR_MOSCRCF_8_MHz:
+ SystemCoreClock *= 2U;
+ break;
+ case CKGR_MOR_MOSCRCF_12_MHz:
+ SystemCoreClock *= 3U;
+ break;
+ default:
+ break;
+ }
+ }
+ break;
+ case PMC_MCKR_CSS_PLLA_CLK: /* PLLA clock */
+ case PMC_MCKR_CSS_UPLL_CLK: /* UPLL clock */
+ if (PMC->CKGR_MOR & CKGR_MOR_MOSCSEL) {
+ SystemCoreClock = CHIP_FREQ_XTAL_12M;
+ } else {
+ SystemCoreClock = CHIP_FREQ_MAINCK_RC_4MHZ;
+
+ switch (PMC->CKGR_MOR & CKGR_MOR_MOSCRCF_Msk) {
+ case CKGR_MOR_MOSCRCF_4_MHz:
+ break;
+ case CKGR_MOR_MOSCRCF_8_MHz:
+ SystemCoreClock *= 2U;
+ break;
+ case CKGR_MOR_MOSCRCF_12_MHz:
+ SystemCoreClock *= 3U;
+ break;
+ default:
+ break;
+ }
+ }
+ if ((PMC->PMC_MCKR & PMC_MCKR_CSS_Msk) == PMC_MCKR_CSS_PLLA_CLK) {
+ SystemCoreClock *= ((((PMC->CKGR_PLLAR) & CKGR_PLLAR_MULA_Msk) >>
+ CKGR_PLLAR_MULA_Pos) + 1U);
+ SystemCoreClock /= ((((PMC->CKGR_PLLAR) & CKGR_PLLAR_DIVA_Msk) >>
+ CKGR_PLLAR_DIVA_Pos));
+ } else {
+ SystemCoreClock = SYS_UTMIPLL / 2U;
+ }
+ break;
+ }
+
+ if ((PMC->PMC_MCKR & PMC_MCKR_PRES_Msk) == PMC_MCKR_PRES_CLK_3) {
+ SystemCoreClock /= 3U;
+ } else {
+ SystemCoreClock >>= ((PMC->PMC_MCKR & PMC_MCKR_PRES_Msk) >>
+ PMC_MCKR_PRES_Pos);
+ }
+}
+
+/**
+ * Initialize flash.
+ */
+void system_init_flash(uint32_t dw_clk)
+{
+ /* Set FWS for embedded Flash access according to operating frequency */
+ if (dw_clk < CHIP_FREQ_FWS_0) {
+ EFC0->EEFC_FMR = EEFC_FMR_FWS(0);
+ EFC1->EEFC_FMR = EEFC_FMR_FWS(0);
+ } else if (dw_clk < CHIP_FREQ_FWS_1) {
+ EFC0->EEFC_FMR = EEFC_FMR_FWS(1);
+ EFC1->EEFC_FMR = EEFC_FMR_FWS(1);
+ } else if (dw_clk < CHIP_FREQ_FWS_2) {
+ EFC0->EEFC_FMR = EEFC_FMR_FWS(2);
+ EFC1->EEFC_FMR = EEFC_FMR_FWS(2);
+ } else if (dw_clk < CHIP_FREQ_FWS_3) {
+ EFC0->EEFC_FMR = EEFC_FMR_FWS(3);
+ EFC1->EEFC_FMR = EEFC_FMR_FWS(3);
+ } else {
+ EFC0->EEFC_FMR = EEFC_FMR_FWS(4);
+ EFC1->EEFC_FMR = EEFC_FMR_FWS(4);
+ }
+}
+
+/* @cond 0 */
+/**INDENT-OFF**/
+#ifdef __cplusplus
+}
+#endif
+/**INDENT-ON**/
+/* @endcond */
diff --git a/cpu/sam3x8e/include/system_sam3xa.h b/cpu/sam3x8e/include/system_sam3xa.h
index d79a9867d28b10a1f4942dbf4de6cb6fa93e46ab..89dad6eecbf665b2ec2dc750499782682d135462 100644
--- a/cpu/sam3x8e/include/system_sam3xa.h
+++ b/cpu/sam3x8e/include/system_sam3xa.h
@@ -3,41 +3,29 @@
* \brief CMSIS Cortex-M# Device Peripheral Access Layer Header File
* for SAM3 devices.
*
- * Copyright (c) 2013-2014 Atmel Corporation. All rights reserved.
+ * Copyright (c) 2012, Atmel Corporation
*
- * \asf_license_start
- *
- * \page License
+ * All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
+ * modification, are permitted provided that the following condition is met:
*
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
*
- * 3. The name of Atmel may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
*
- * 4. This software may only be redistributed and used in connection with an
- * Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* \par Purpose
*