diff --git a/arch/avr/include/at90usb/irq.h b/arch/avr/include/at90usb/irq.h
new file mode 100644
index 0000000000000000000000000000000000000000..6d2b9166c40c8d824b5542819cda620c4d829ef6
--- /dev/null
+++ b/arch/avr/include/at90usb/irq.h
@@ -0,0 +1,149 @@
+/****************************************************************************
+ * arch/avr/include/avr/at90usb/irq.h
+ *
+ * Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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.
+ * 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.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS 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.
+ *
+ ****************************************************************************/
+
+/* This file should never be included directed but, rather, only indirectly
+ * through nuttx/irq.h
+ */
+
+#ifndef __ARCH_AVR_INCLUDE_AT90USB_IRQ_H
+#define __ARCH_AVR_INCLUDE_AT90USB_IRQ_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/irq.h>
+#include <arch/avr/avr.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/* The AT90USB has 38 interrupt vectors including vector 0, the reset
+ * vector. The remaining 37 are assigned IRQ numbers here:
+ */
+
+#define AT90USB_IRQ_INT0 0 /* 0x0002 External Interrupt Request 0 */
+#define AT90USB_IRQ_INT1 1 /* 0x0004 External Interrupt Request 1 */
+#define AT90USB_IRQ_INT2 2 /* 0x0006 External Interrupt Request 2 */
+#define AT90USB_IRQ_INT3 3 /* 0x0008 External Interrupt Request 3 */
+#define AT90USB_IRQ_INT4 4 /* 0x000a External Interrupt Request 4 */
+#define AT90USB_IRQ_INT5 5 /* 0x000c External Interrupt Request 5 */
+#define AT90USB_IRQ_INT6 6 /* 0x000e External Interrupt Request 6 */
+#define AT90USB_IRQ_INT7 7 /* 0x0010 External Interrupt Request 7 */
+#define AT90USB_IRQ_PCINT0 8 /* 0x0012 PCINT0 Pin Change Interrupt Request 0 */
+#define AT90USB_IRQ_USBGEN 9 /* 0x0014 USB General USB General Interrupt request */
+#define AT90USB_IRQ_USBEP 10 /* 0x0016 USB Endpoint/Pipe USB ENdpoint/Pipe Interrupt request */
+#define AT90USB_IRQ_WDT 11 /* 0x0018 Watchdog Time-out Interrupt */
+#define AT90USB_IRQ_T2COMPA 12 /* 0x001a TIMER2 COMPA Timer/Counter2 Compare Match A */
+#define AT90USB_IRQ_T2COMPB 13 /* 0x001c TIMER2 COMPB Timer/Counter2 Compare Match B */
+#define AT90USB_IRQ_T2OVF 14 /* 0x001e TIMER2 OVF Timer/Counter2 Overflow */
+#define AT90USB_IRQ_T1CAPT 15 /* 0x0020 TIMER1 CAPT Timer/Counter1 Capture Event */
+#define AT90USB_IRQ_T1COMPA 16 /* 0x0022 TIMER1 COMPA Timer/Counter1 Compare Match A */
+#define AT90USB_IRQ_T1COMPB 17 /* 0x0024 TIMER1 COMPB Timer/Counter1 Compare Match B */
+#define AT90USB_IRQ_T1COMPC 18 /* 0x0026 TIMER1 COMPC Timer/Counter1 Compare Match c */
+#define AT90USB_IRQ_T1OVF 19 /* 0x0028 TIMER1 OVF Timer/Counter1 Overflow */
+#define AT90USB_IRQ_T0COMPA 20 /* 0x002a TIMER0 COMPA Timer/Counter0 Compare Match A */
+#define AT90USB_IRQ_T0COMPB 21 /* 0x002c TIMER0 COMPB Timer/Counter0 Compare Match B */
+#define AT90USB_IRQ_T0OVF 22 /* 0x002e TIMER0 OVF Timer/Counter0 Overflow */
+#define AT90USB_IRQ_SPI 23 /* 0x0030 STC SPI Serial Transfer Complete */
+#define AT90USB_IRQ_U1RX 24 /* 0x0032 USART1 Rx Complete */
+#define AT90USB_IRQ_U1DRE 25 /* 0x0034 USART1 Data Register Empty */
+#define AT90USB_IRQ_U1TX 26 /* 0x0036 USART1 Tx Complete */
+#define AT90USB_IRQ_ANACOMP 27 /* 0x0038 ANALOG COMP Analog Comparator */
+#define AT90USB_IRQ_ADC 28 /* 0x003a ADC Conversion Complete */
+#define AT90USB_IRQ_EE 29 /* 0x003c EEPROM Ready */
+#define AT90USB_IRQ_T3CAPT 30 /* 0x003e TIMER3 CAPT Timer/Counter3 Capture Event */
+#define AT90USB_IRQ_T3COMPA 31 /* 0x0034 TIMER3 COMPA Timer/Counter3 Compare Match A */
+#define AT90USB_IRQ_T3COMPB 32 /* 0x0042 TIMER3 COMPB Timer/Counter3 Compare Match B */
+#define AT90USB_IRQ_T3COMPC 33 /* 0x0044 TIMER3 COMPC Timer/Counter3 Compare Match C */
+#define AT90USB_IRQ_T3OVF 34 /* 0x0046 TIMER3 OVF Timer/Counter3 Overflow */
+#define AT90USB_IRQ_TWI 35 /* 0x0048 TWI Two-wire Serial Interface */
+#define AT90USB_IRQ_SPMRDY 36 /* 0x004a Store Program Memory Ready */
+
+#define NR_IRQS 37
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Inline functions
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+/* Save the current interrupt enable state & disable all interrupts */
+
+static inline irqstate_t irqsave(void)
+{
+ /* Needs to return the current interrupt state, then disable interrupts */
+#warning "Not implemented"
+ return 0
+}
+
+/* Restore saved interrupt state */
+
+static inline void irqrestore(irqstate_t flags)
+{
+ /* Based on the provided interrupt flags, conditionally enable interrupts */
+#warning "Not implemented"
+}
+#endif /* __ASSEMBLY__ */
+
+/****************************************************************************
+ * Public Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+#endif
+
+#endif /* __ARCH_AVR_INCLUDE_AT90USB_IRQ_H */
+
diff --git a/arch/avr/include/atmega/irq.h b/arch/avr/include/atmega/irq.h
new file mode 100644
index 0000000000000000000000000000000000000000..ea5b0206046402e86af4c41c6d294186bc3a0bd7
--- /dev/null
+++ b/arch/avr/include/atmega/irq.h
@@ -0,0 +1,146 @@
+/****************************************************************************
+ * arch/avr/include/avr/atmega/irq.h
+ *
+ * Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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.
+ * 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.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS 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.
+ *
+ ****************************************************************************/
+
+/* This file should never be included directed but, rather, only indirectly
+ * through nuttx/irq.h
+ */
+
+#ifndef __ARCH_AVR_INCLUDE_ATMEGA_IRQ_H
+#define __ARCH_AVR_INCLUDE_ATMEGA_IRQ_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/irq.h>
+#include <arch/avr/avr.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/* The ATmega128 has 35 interrupt vectors including vector 0, the reset
+ * vector. The remaining 34 are assigned IRQ numbers here:
+ */
+
+#define ATMEGA_IRQ_INT0 0 /* 0x0002 External Interrupt Request 0 */
+#define ATMEGA_IRQ_INT1 1 /* 0x0004 External Interrupt Request 1 */
+#define ATMEGA_IRQ_INT2 2 /* 0x0006 External Interrupt Request 2 */
+#define ATMEGA_IRQ_INT3 3 /* 0x0008 External Interrupt Request 3 */
+#define ATMEGA_IRQ_INT4 4 /* 0x000a External Interrupt Request 4 */
+#define ATMEGA_IRQ_INT5 5 /* 0x000c External Interrupt Request 5 */
+#define ATMEGA_IRQ_INT6 6 /* 0x000e External Interrupt Request 6 */
+#define ATMEGA_IRQ_INT7 7 /* 0x0010 External Interrupt Request 7 */
+#define ATMEGA_IRQ_T2COMP 8 /* 0x0012 TIMER2 COMP Timer/Counter2 Compare Match */
+#define ATMEGA_IRQ_T2OVF 9 /* 0x0014 TIMER2 OVF Timer/Counter2 Overflow */
+#define ATMEGA_IRQ_T1CAPT 10 /* 0x0016 TIMER1 CAPT Timer/Counter1 Capture Event */
+#define ATMEGA_IRQ_T1COMPA 11 /* 0x0018 TIMER1 COMPA Timer/Counter1 Compare Match A */
+#define ATMEGA_IRQ_T1COMPB 12 /* 0x001a TIMER1 COMPB Timer/Counter1 Compare Match B */
+#define ATMEGA_IRQ_T1OVF 13 /* 0x001c TIMER1 OVF Timer/Counter1 Overflow */
+#define ATMEGA_IRQ_T0COMP 14 /* 0x001e TIMER0 COMP Timer/Counter0 Compare Match */
+#define ATMEGA_IRQ_T0OVF 15 /* 0x0020 TIMER0 OVF Timer/Counter0 Overflow */
+#define ATMEGA_IRQ_SPI 16 /* 0x0022 STC SPI Serial Transfer Complete */
+#define ATMEGA_IRQ_U0RX 17 /* 0x0024 USART0 Rx Complete */
+#define ATMEGA_IRQ_U0DRE 18 /* 0x0026 USART0 Data Register Empty */
+#define ATMEGA_IRQ_U0TX 19 /* 0x0028 USART0 Tx Complete */
+#define ATMEGA_IRQ_ADC 20 /* 0x002a ADC Conversion Complete */
+#define ATMEGA_IRQ_EE 21 /* 0x002c EEPROM Ready */
+#define ATMEGA_IRQ_ANACOMP 22 /* 0x002e ANALOG COMP Analog Comparator */
+#define ATMEGA_IRQ_T1COMPC 23 /* 0x0030 TIMER1 COMPC Timer/Countre1 Compare Match C */
+#define ATMEGA_IRQ_T3CAPT 24 /* 0x0032 TIMER3 CAPT Timer/Counter3 Capture Event */
+#define ATMEGA_IRQ_T3COMPA 25 /* 0x0034 TIMER3 COMPA Timer/Counter3 Compare Match A */
+#define ATMEGA_IRQ_T3COMPB 26 /* 0x0036 TIMER3 COMPB Timer/Counter3 Compare Match B */
+#define ATMEGA_IRQ_T3COMPC 27 /* 0x0038 TIMER3 COMPC Timer/Counter3 Compare Match C */
+#define ATMEGA_IRQ_T3OVF 28 /* 0x003a TIMER3 OVF Timer/Counter3 Overflow */
+#define ATMEGA_IRQ_U1RX 29 /* 0x003c USART1 Rx Complete */
+#define ATMEGA_IRQ_U1DRE 30 /* 0x003e USART1 Data Register Empty */
+#define ATMEGA_IRQ_U1TX 31 /* 0x0040 USART1 Tx Complete */
+#define ATMEGA_IRQ_TWI 32 /* 0x0042 TWI Two-wire Serial Interface */
+#define ATMEGA_IRQ_SPMRDY 33 /* 0x0044 Store Program Memory Ready */
+
+#define NR_IRQS 34
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Inline functions
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+/* Save the current interrupt enable state & disable all interrupts */
+
+static inline irqstate_t irqsave(void)
+{
+ /* Needs to return the current interrupt state, then disable interrupts */
+#warning "Not implemented"
+ return 0
+}
+
+/* Restore saved interrupt state */
+
+static inline void irqrestore(irqstate_t flags)
+{
+ /* Based on the provided interrupt flags, conditionally enable interrupts */
+#warning "Not implemented"
+}
+#endif /* __ASSEMBLY__ */
+
+/****************************************************************************
+ * Public Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+#endif
+
+#endif /* __ARCH_AVR_INCLUDE_ATMEGA_IRQ_H */
+
diff --git a/arch/avr/src/at90usb/Make.defs b/arch/avr/src/at90usb/Make.defs
new file mode 100644
index 0000000000000000000000000000000000000000..48973c89879d626b8ea36e9fa463ca5779ec8698
--- /dev/null
+++ b/arch/avr/src/at90usb/Make.defs
@@ -0,0 +1,64 @@
+############################################################################
+# arch/avr/src/at90usb/Make.defs
+#
+# Copyright (C) 2011 Gregory Nutt. All rights reserved.
+# Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+#
+# 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.
+# 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.
+# 3. Neither the name NuttX nor the names of its contributors may be
+# used to endorse or promote products derived from this software
+# without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS 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.
+#
+############################################################################
+
+# The start-up, "head", file
+
+HEAD_ASRC = at90usb_head.S
+
+# Common AVR files
+
+CMN_ASRCS = up_exceptions.S up_fullcontextrestore.S up_switchcontext.S
+CMN_CSRCS = up_assert.c up_allocateheap.c up_blocktask.c up_copystate.c \
+ up_createstack.c up_mdelay.c up_udelay.c up_exit.c up_idle.c \
+ up_initialize.c up_initialstate.c up_interruptcontext.c \
+ up_modifyreg8.c up_modifyreg16.c up_modifyreg32.c \
+ up_releasepending.c up_releasestack.c up_reprioritizertr.c \
+ up_schedulesigaction.c up_sigdeliver.c up_unblocktask.c \
+ up_usestack.c up_doirq.c
+
+# Required ATMEGA files
+
+CHIP_ASRCS =
+CHIP_CSRCS = at90usb_clkinit.c at90usb_gpio.c at90usb_irq.c \
+ at90usb_lowconsole.c at90usb_lowinit.c at90usb_serial.c \
+ at90usb_timerisr.c
+
+# Configuration-dependent ATMEGA files
+
+ifeq ($(CONFIG_AVR_GPIOIRQ),y)
+CHIP_CSRCS += at90usb_gpioirq.c
+endif
+
+
diff --git a/arch/avr/src/at90usb/at90usb_head.S b/arch/avr/src/at90usb/at90usb_head.S
new file mode 100755
index 0000000000000000000000000000000000000000..a6745d866a6e2447cfb988ef0d71980c5e0278c4
--- /dev/null
+++ b/arch/avr/src/at90usb/at90usb_head.S
@@ -0,0 +1,220 @@
+/****************************************************************************
+ * arch/avr32/src/at90usb/at90usb_head.S
+ *
+ * Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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.
+ * 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.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#define __AVR_ATmega128__
+#include <avr/io.h>
+#include <avr/sfr_defs.h>
+
+/****************************************************************************
+ * Pre-processor definitions
+ ****************************************************************************/
+
+#define STACKBASE (_ebss+CONFIG_IDLETHREAD_STACKSIZE-4)
+
+/****************************************************************************
+ * External Symbols
+ ****************************************************************************/
+
+ .file "up_nommuhead.S"
+ .global _sbss /* Start of .bss. Defined by ld.script */
+ .global _ebss /* End of .bss. Defined by ld.script */
+ .global _sdata /* Start of .data section in RAM */
+ .global _edata /* End of .data section in RAM */
+ .global _eronly /* Start of .data section in FLASH */
+ .global up_lowinit /* Perform low level initialization */
+ .global os_start /* NuttX entry point */
+
+ .global vectortab
+ .global at90usb_int0 /* External interrupt request 0 */
+ .global at90usb_int1 /* External interrupt request 1 */
+ .global at90usb_int2 /* External interrupt request 2 */
+ .global at90usb_int3 /* External interrupt request 3 */
+ .global at90usb_int4 /* External interrupt request 4 */
+ .global at90usb_int5 /* External interrupt request 5 */
+ .global at90usb_int6 /* External interrupt request 6 */
+ .global at90usb_int7 /* External interrupt request 7 */
+ .global at90usb_pcint0 /* PCINT0 Pin Change Interrupt Request 0 */
+ .global at90usb_usbgen /* USB General USB General Interrupt request */
+ .global at90usb_usbep /* USB Endpoint/Pipe USB ENdpoint/Pipe Interrupt request */
+ .global at90usb_wdt /* Watchdog Time-out Interrupt */
+ .global at90usb_t2compa /* TIMER2 COMPA Timer/Counter2 Compare Match A */
+ .global at90usb_t2compb /* TIMER2 COMPB Timer/Counter2 Compare Match B */
+ .global at90usb_t2ovf /* TIMER2 OVF Timer/Counter2 Overflow */
+ .global at90usb_t1capt /* TIMER1 CAPT Timer/Counter1 Capture Event */
+ .global at90usb_t1compa /* TIMER1 COMPA Timer/Counter1 Compare Match A */
+ .global at90usb_t1compb /* TIMER1 COMPB Timer/Counter1 Compare Match B */
+ .global at90usb_t1compc /* TIMER1 COMPC Timer/Counter1 Compare Match c */
+ .global at90usb_t1ovf /* TIMER1 OVF Timer/Counter1 Overflow */
+ .global at90usb_t0compa /* TIMER0 COMPA Timer/Counter0 Compare Match A */
+ .global at90usb_t0compb /* TIMER0 COMPB Timer/Counter0 Compare Match B */
+ .global at90usb_t0ovf /* TIMER0 OVF Timer/Counter0 Overflow */
+ .global at90usb_spi /* STC SPI Serial Transfer Complete */
+ .global at90usb_u1rx /* USART1 Rx Complete */
+ .global at90usb_u1dre /* USART1 Data Register Empty */
+ .global at90usb_u1tx /* USART1 Tx Complete */
+ .global at90usb_anacomp /* ANALOG COMP Analog Comparator */
+ .global at90usb_adc /* ADC Conversion Complete */
+ .global at90usb_ee /* EEPROM Ready */
+ .global at90usb_t3capt /* TIMER3 CAPT Timer/Counter3 Capture Event */
+ .global at90usb_t3compa /* TIMER3 COMPA Timer/Counter3 Compare Match A */
+ .global at90usb_t3compb /* TIMER3 COMPB Timer/Counter3 Compare Match B */
+ .global at90usb_t3compc /* TIMER3 COMPC Timer/Counter3 Compare Match C */
+ .global at90usb_t3ovf /* TIMER3 OVF Timer/Counter3 Overflow */
+ .global at90usb_twi /* TWI Two-wire Serial Interface */
+ .global at90usb_spmrdy /* Store Program Memory Ready */
+
+/****************************************************************************
+ * Macros
+ ****************************************************************************/
+
+ .macro vector name
+ jmp \name
+ .endm
+
+/****************************************************************************
+ * Vector Table
+ ****************************************************************************/
+
+/* The AT90USB has 38 interrupt vectors including vector 0, the reset
+ * vector.
+ */
+
+ .section .vectors, "ax", @progbits
+ .func vectortab
+vectortab:
+ jmp __start /* 0: Vector 0 is the reset vector */
+ vector at90usb_int0 /* 1: External interrupt request 0 */
+ vector at90usb_int1 /* 2: External interrupt request 1 */
+ vector at90usb_int2 /* 3: External interrupt request 2 */
+ vector at90usb_int3 /* 4: External interrupt request 3 */
+ vector at90usb_int4 /* 5: External interrupt request 4 */
+ vector at90usb_int5 /* 6: External interrupt request 5 */
+ vector at90usb_int6 /* 7: External interrupt request 6 */
+ vector at90usb_int7 /* 8: External interrupt request 7 */
+ vector at90usb_pcint0 /* 9: PCINT0 Pin Change Interrupt Request 0 */
+ vector at90usb_usbgen /* 10: USB General USB General Interrupt request */
+ vector at90usb_usbep /* 11: USB Endpoint/Pipe USB ENdpoint/Pipe Interrupt request */
+ vector at90usb_wdt /* 12: Watchdog Time-out Interrupt */
+ vector at90usb_t2compa /* 13: TIMER2 COMPA Timer/Counter2 Compare Match A */
+ vector at90usb_t2compb /* 14: TIMER2 COMPB Timer/Counter2 Compare Match B */
+ vector at90usb_t2ovf /* 15: TIMER2 OVF Timer/Counter2 Overflow */
+ vector at90usb_t1capt /* 16: TIMER1 CAPT Timer/Counter1 Capture Event */
+ vector at90usb_t1compa /* 17: TIMER1 COMPA Timer/Counter1 Compare Match A */
+ vector at90usb_t1compb /* 18: TIMER1 COMPB Timer/Counter1 Compare Match B */
+ vector at90usb_t1compc /* 19: TIMER1 COMPC Timer/Counter1 Compare Match c */
+ vector at90usb_t1ovf /* 20: TIMER1 OVF Timer/Counter1 Overflow */
+ vector at90usb_t0compa /* 21: TIMER0 COMPA Timer/Counter0 Compare Match A */
+ vector at90usb_t0compb /* 22: TIMER0 COMPB Timer/Counter0 Compare Match B */
+ vector at90usb_t0ovf /* 23: TIMER0 OVF Timer/Counter0 Overflow */
+ vector at90usb_spi /* 24: STC SPI Serial Transfer Complete */
+ vector at90usb_u1rx /* 25: USART1 Rx Complete */
+ vector at90usb_u1dre /* 26: USART1 Data Register Empty */
+ vector at90usb_u1tx /* 27: USART1 Tx Complete */
+ vector at90usb_anacomp /* 28: ANALOG COMP Analog Comparator */
+ vector at90usb_adc /* 29: ADC Conversion Complete */
+ vector at90usb_ee /* 30: EEPROM Ready */
+ vector at90usb_t3capt /* 31: TIMER3 CAPT Timer/Counter3 Capture Event */
+ vector at90usb_t3compa /* 32: TIMER3 COMPA Timer/Counter3 Compare Match A */
+ vector at90usb_t3compb /* 33: TIMER3 COMPB Timer/Counter3 Compare Match B */
+ vector at90usb_t3compc /* 34: TIMER3 COMPC Timer/Counter3 Compare Match C */
+ vector at90usb_t3ovf /* 35: TIMER3 OVF Timer/Counter3 Overflow */
+ vector at90usb_twi /* 36: TWI Two-wire Serial Interface */
+ vector at90usb_spmrdy /* 37: Store Program Memory Ready */
+ .endfunc
+
+/****************************************************************************
+ * Reset Entry Point
+ ****************************************************************************/
+
+ .section .init, "ax", @progbits
+ .func __start
+__start:
+
+ /* Initialize the IDLE thread stack */
+
+ clr r1
+ out _SFR_IO_ADDR(SREG), r1
+ ldi r28, lo8(STACKBASE)
+ ldi r29, hi8(STACKBASE)
+ out _SFR_IO_ADDR(SPH), r29
+ out _SFR_IO_ADDR(SPL), r28
+
+ /* Copy initial global data values from FLASH into RAM */
+
+ ldi r17, hi8(_edata)
+ ldi r26, lo8(_sdata)
+ ldi r27, hi8(_sdata)
+ ldi r30, lo8(_eronly)
+ ldi r31, hi8(_eronly)
+ ldi r16, hh8(_eronly)
+ out _SFR_IO_ADDR(RAMPZ), r16
+ rjmp .Lcopystart
+
+.Lcopyloop:
+ elpm r0, Z+
+ st X+, r0
+
+.Lcopystart:
+ cpi r26, lo8(__data_end)
+ cpc r27, r17
+ brne .Lcopyloop
+
+ /* Now start NuttX */
+
+ call os_start /* Start NuttX */
+ jmp exit
+ .endfunc
+
+/****************************************************************************
+ * Heap Base
+ ****************************************************************************/
+
+ /* This global variable is unsigned long g_heapbase and is
+ * exported from here only because of its coupling to other
+ * uses of _ebss in this file
+ */
+
+ .data
+ .globl g_heapbase
+ .type g_heapbase, object
+g_heapbase:
+ .word _ebss+CONFIG_IDLETHREAD_STACKSIZE
+ .size g_heapbase, .-g_heapbase
+ .end
diff --git a/arch/avr/src/at90usb/at90usb_internal.h b/arch/avr/src/at90usb/at90usb_internal.h
new file mode 100644
index 0000000000000000000000000000000000000000..3d7c4e7dcff3a68809220c4712677ac4b16b1a63
--- /dev/null
+++ b/arch/avr/src/at90usb/at90usb_internal.h
@@ -0,0 +1,245 @@
+/****************************************************************************
+ * arch/avr/src/at90usb/at90usb_internal.h
+ *
+ * Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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.
+ * 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.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS 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.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_AVR_SRC_ATMEGA_ATMEGA_INTERNAL_H
+#define __ARCH_AVR_SRC_ATMEGA_ATMEGA_INTERNAL_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include "at90usb_config.h"
+
+#ifdef CONFIG_AVR_GPIOIRQ
+# include <nuttx/irq.h>
+#endif
+
+#include <stdint.h>
+#include <stdbool.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Bit-encoded input to at90usb_configgpio() ********************************/
+# warning "Missing definitions"
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+/****************************************************************************
+ * Inline Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_clkinit
+ *
+ * Description:
+ * Initialiaze clock/PLL settings per the definitions in the board.h file.
+ *
+ ****************************************************************************/
+
+EXTERN void up_clkinitialize(void);
+
+/****************************************************************************
+ * Name: usart_reset
+ *
+ * Description:
+ * Reset a USART.
+ *
+ ****************************************************************************/
+
+EXTERN void usart_reset(uintptr_t usart_base);
+
+/****************************************************************************
+ * Name: usart_configure
+ *
+ * Description:
+ * Configure a USART as a RS-232 UART.
+ *
+ ****************************************************************************/
+
+void usart_configure(uintptr_t usart_base, uint32_t baud, unsigned int parity,
+ unsigned int nbits, bool stop2);
+
+/****************************************************************************
+ * Name: up_consoleinit
+ *
+ * Description:
+ * Initialize a console for debug output. This function is called very
+ * early in the intialization sequence to configure the serial console
+ * uart (only).
+ *
+ ****************************************************************************/
+
+EXTERN void up_consoleinit(void);
+
+/****************************************************************************
+ * Name: up_boardinit
+ *
+ * Description:
+ * This function must be provided by the board-specific logic in the
+ * directory configs/<board-name>/up_boot.c.
+ *
+ ****************************************************************************/
+
+EXTERN void up_boardinitialize(void);
+
+/****************************************************************************
+ * Name: at90usb_configgpio
+ *
+ * Description:
+ * Configure a GPIO pin based on bit-encoded description of the pin.
+ *
+ ****************************************************************************/
+
+EXTERN int at90usb_configgpio(uint16_t cfgset);
+
+/****************************************************************************
+ * Name: at90usb_gpiowrite
+ *
+ * Description:
+ * Write one or zero to the selected GPIO pin
+ *
+ ****************************************************************************/
+
+EXTERN void at90usb_gpiowrite(uint16_t pinset, bool value);
+
+/****************************************************************************
+ * Name: at90usb_gpioread
+ *
+ * Description:
+ * Read one or zero from the selected GPIO pin
+ *
+ ****************************************************************************/
+
+EXTERN bool at90usb_gpioread(uint16_t pinset);
+
+/****************************************************************************
+ * Name: gpio_irqinitialize
+ *
+ * Description:
+ * Initialize all vectors to the unexpected interrupt handler
+ *
+ * Configuration Notes:
+ * Configuration CONFIG_AVR_GPIOIRQ must be selected to enable the
+ * overall GPIO IRQ feature.
+ *
+ * Assumptions:
+ * Called during the early boot sequence before global interrupts have
+ * been enabled.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_AVR_GPIOIRQ
+EXTERN void weak_function gpio_irqinitialize(void);
+#endif
+
+/****************************************************************************
+ * Name: gpio_irqattach
+ *
+ * Description:
+ * Attach in GPIO interrupt to the provide 'isr'
+ *
+ * Configuration Notes:
+ * Configuration CONFIG_AVR_GPIOIRQ must be selected to enable the
+ * overall GPIO IRQ feature.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_AVR_GPIOIRQ
+EXTERN int gpio_irqattach(int irq, xcpt_t newisr, xcpt_t *oldisr);
+#endif
+
+/****************************************************************************
+ * Name: gpio_irqenable
+ *
+ * Description:
+ * Enable the GPIO IRQ specified by 'irq'
+ *
+ * Configuration Notes:
+ * Configuration CONFIG_AVR_GPIOIRQ must be selected to enable the
+ * overall GPIO IRQ feature.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_AVR_GPIOIRQ
+EXTERN void gpio_irqenable(int irq);
+#endif
+
+/*****************************************************************************
+ * Name: gpio_irqdisable
+ *
+ * Description:
+ * Disable the GPIO IRQ specified by 'irq'
+ *
+ * Configuration Notes:
+ * Configuration CONFIG_AVR_GPIOIRQ must be selected to enable the
+ * overall GPIO IRQ feature.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_AVR_GPIOIRQ
+EXTERN void gpio_irqdisable(int irq);
+#endif
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __ARCH_AVR_SRC_ATMEGA_ATMEGA_INTERNAL_H */
+
diff --git a/arch/avr/src/at90usb/at90usb_memorymap.h b/arch/avr/src/at90usb/at90usb_memorymap.h
new file mode 100644
index 0000000000000000000000000000000000000000..c312a7cca0022400d834fdb239a065d1c4a25599
--- /dev/null
+++ b/arch/avr/src/at90usb/at90usb_memorymap.h
@@ -0,0 +1,68 @@
+/************************************************************************************
+ * arch/avr/src/at90usb/at90usb_memorymap.h
+ *
+ * Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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.
+ * 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.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS 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.
+ *
+ ************************************************************************************/
+
+#ifndef __ARCH_AVR_SRC_ATMEGA_ATMEGA_MEMORYMAP_H
+#define __ARCH_AVR_SRC_ATMEGA_ATMEGA_MEMORYMAP_H
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+/* Physical memory map */
+# warning "Missing Definitions"
+
+/* Peripheral Address Map */
+# warning "Missing Definitions"
+
+/************************************************************************************
+ * Public Types
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Data
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+#endif /* __ARCH_AVR_SRC_ATMEGA_ATMEGA_MEMORYMAP_H */
+
diff --git a/arch/avr/src/at90usb/chip.h b/arch/avr/src/at90usb/chip.h
new file mode 100644
index 0000000000000000000000000000000000000000..facc65ec165b418c6377f5dbe8bfd248d413c687
--- /dev/null
+++ b/arch/avr/src/at90usb/chip.h
@@ -0,0 +1,75 @@
+/************************************************************************************
+ * arch/avr/src/at90usb/chip.h
+ *
+ * Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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.
+ * 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.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS 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.
+ *
+ ************************************************************************************/
+
+#ifndef __ARCH_AVR_SRC_ATMEGA_CHIP_H
+#define __ARCH_AVR_SRC_ATMEGA_CHIP_H
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+/* Define features for supported chip in the ATMEGA family */
+
+#if 0
+#else
+# error "Unsupported AVR chip"
+#endif
+
+/* Include only the memory map. Other chip hardware files should then include this
+ * file for the proper setup
+ */
+
+#include "at90usb_memorymap.h"
+
+/************************************************************************************
+ * Public Types
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Data
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+#endif /* __ARCH_AVR_SRC_ATMEGA_CHIP_H */
+
diff --git a/arch/avr/src/atmega/atmega_head.S b/arch/avr/src/atmega/atmega_head.S
new file mode 100755
index 0000000000000000000000000000000000000000..ec11e4f7f96573ddd3e81f52aa5235891c6b2eff
--- /dev/null
+++ b/arch/avr/src/atmega/atmega_head.S
@@ -0,0 +1,214 @@
+/****************************************************************************
+ * arch/avr32/src/atmega/atmega_head.S
+ *
+ * Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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.
+ * 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.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#define __AVR_ATmega128__
+#include <avr/io.h>
+#include <avr/sfr_defs.h>
+
+/****************************************************************************
+ * Pre-processor definitions
+ ****************************************************************************/
+
+#define STACKBASE (_ebss+CONFIG_IDLETHREAD_STACKSIZE-4)
+
+/****************************************************************************
+ * External Symbols
+ ****************************************************************************/
+
+ .file "up_nommuhead.S"
+ .global _sbss /* Start of .bss. Defined by ld.script */
+ .global _ebss /* End of .bss. Defined by ld.script */
+ .global _sdata /* Start of .data section in RAM */
+ .global _edata /* End of .data section in RAM */
+ .global _eronly /* Start of .data section in FLASH */
+ .global up_lowinit /* Perform low level initialization */
+ .global os_start /* NuttX entry point */
+
+ .global vectortab
+ .global atmega_int0 /* External interrupt request 0 */
+ .global atmega_int1 /* External interrupt request 1 */
+ .global atmega_int2 /* External interrupt request 2 */
+ .global atmega_int3 /* External interrupt request 3 */
+ .global atmega_int4 /* External interrupt request 4 */
+ .global atmega_int5 /* External interrupt request 5 */
+ .global atmega_int6 /* External interrupt request 6 */
+ .global atmega_int7 /* External interrupt request 7 */
+ .global atmega_t2comp /* TIMER2 COMP timer/counter2 compare match */
+ .global atmega_t2ovf /* TIMER2 OVF timer/counter2 overflow */
+ .global atmega_t1capt /* TIMER1 CAPT timer/counter1 capture event */
+ .global atmega_t1compa /* TIMER1 COMPA timer/counter1 compare match a */
+ .global atmega_t1compb /* TIMER1 COMPB timer/counter1 compare match b */
+ .global atmega_t1ovf /* TIMER1 OVF timer/counter1 overflow */
+ .global atmega_t0comp /* TIMER0 COMP timer/counter0 compare match */
+ .global atmega_t0ovf /* TIMER0 OVF timer/counter0 overflow */
+ .global atmega_spi /* STC SPI serial transfer complete */
+ .global atmega_u0rx /* USART0 RX complete */
+ .global atmega_u0dre /* USART0 data register empty */
+ .global atmega_u0tx /* USART0 TX complete */
+ .global atmega_adc /* ADC conversion complete */
+ .global atmega_ee /* EEPROM ready */
+ .global atmega_anacomp /* ANALOG COMP analog comparator */
+ .global atmega_t1compc /* TIMER1 COMPC timer/countre1 compare match c */
+ .global atmega_t3capt /* TIMER3 CAPT timer/counter3 capture event */
+ .global atmega_t3compa /* TIMER3 COMPA timer/counter3 compare match a */
+ .global atmega_t3compb /* TIMER3 COMPB timer/counter3 compare match b */
+ .global atmega_t3compc /* TIMER3 COMPC timer/counter3 compare match c */
+ .global atmega_t3ovf /* TIMER3 OVF timer/counter3 overflow */
+ .global atmega_u1rx /* USART1 RX complete */
+ .global atmega_u1dre /* USART1 data register empty */
+ .global atmega_u1tx /* USART1 TX complete */
+ .global atmega_twi /* TWI two-wire serial interface */
+ .global atmega_spmrdy /* Store program memory ready */
+
+/****************************************************************************
+ * Macros
+ ****************************************************************************/
+
+ .macro vector name
+ jmp \name
+ .endm
+
+/****************************************************************************
+ * Vector Table
+ ****************************************************************************/
+
+/* The ATmega128 has 35 interrupt vectors including vector 0, the reset
+ * vector.
+ */
+
+ .section .vectors, "ax", @progbits
+ .func vectortab
+vectortab:
+ jmp __start /* 0: Vector 0 is the reset vector */
+ vector atmega_int0 /* 1: External interrupt request 0 */
+ vector atmega_int1 /* 2: External interrupt request 1 */
+ vector atmega_int2 /* 3: External interrupt request 2 */
+ vector atmega_int3 /* 4: External interrupt request 3 */
+ vector atmega_int4 /* 5: External interrupt request 4 */
+ vector atmega_int5 /* 6 : External interrupt request 5 */
+ vector atmega_int6 /* 7: External interrupt request 6 */
+ vector atmega_int7 /* 8: External interrupt request 7 */
+ vector atmega_t2comp /* 9: TIMER2 COMP timer/counter2 compare match */
+ vector atmega_t2ovf /* 10: TIMER2 OVF timer/counter2 overflow */
+ vector atmega_t1capt /* 11: TIMER1 CAPT timer/counter1 capture event */
+ vector atmega_t1compa /* 12: TIMER1 COMPA timer/counter1 compare match a */
+ vector atmega_t1compb /* 13: TIMER1 COMPB timer/counter1 compare match b */
+ vector atmega_t1ovf /* 14: TIMER1 OVF timer/counter1 overflow */
+ vector atmega_t0comp /* 15: TIMER0 COMP timer/counter0 compare match */
+ vector atmega_t0ovf /* 16: TIMER0 OVF timer/counter0 overflow */
+ vector atmega_spi /* 17: STC SPI serial transfer complete */
+ vector atmega_u0rx /* 18: USART0 RX complete */
+ vector atmega_u0dre /* 19: USART0 data register empty */
+ vector atmega_u0tx /* 20: USART0 TX complete */
+ vector atmega_adc /* 21: ADC conversion complete */
+ vector atmega_ee /* 22: EEPROM ready */
+ vector atmega_anacomp /* 23: ANALOG COMP analog comparator */
+ vector atmega_t1compc /* 24: TIMER1 COMPC timer/countre1 compare match c */
+ vector atmega_t3capt /* 25: TIMER3 CAPT timer/counter3 capture event */
+ vector atmega_t3compa /* 26: TIMER3 COMPA timer/counter3 compare match a */
+ vector atmega_t3compb /* 27: TIMER3 COMPB timer/counter3 compare match b */
+ vector atmega_t3compc /* 28: TIMER3 COMPC timer/counter3 compare match c */
+ vector atmega_t3ovf /* 29: TIMER3 OVF timer/counter3 overflow */
+ vector atmega_u1rx /* 30: USART1 RX complete */
+ vector atmega_u1dre /* 31: USART1 data register empty */
+ vector atmega_u1tx /* 32: USART1 TX complete */
+ vector atmega_twi /* 33: TWI two-wire serial interface */
+ vector atmega_spmrdy /* 34: Store program memory ready */
+ .endfunc
+
+/****************************************************************************
+ * Reset Entry Point
+ ****************************************************************************/
+
+ .section .init, "ax", @progbits
+ .func __start
+__start:
+
+ /* Initialize the IDLE thread stack */
+
+ clr r1
+ out _SFR_IO_ADDR(SREG), r1
+ ldi r28, lo8(STACKBASE)
+ ldi r29, hi8(STACKBASE)
+ out _SFR_IO_ADDR(SPH), r29
+ out _SFR_IO_ADDR(SPL), r28
+
+ /* Copy initial global data values from FLASH into RAM */
+
+ ldi r17, hi8(_edata)
+ ldi r26, lo8(_sdata)
+ ldi r27, hi8(_sdata)
+ ldi r30, lo8(_eronly)
+ ldi r31, hi8(_eronly)
+ ldi r16, hh8(_eronly)
+ out _SFR_IO_ADDR(RAMPZ), r16
+ rjmp .Lcopystart
+
+.Lcopyloop:
+ elpm r0, Z+
+ st X+, r0
+
+.Lcopystart:
+ cpi r26, lo8(__data_end)
+ cpc r27, r17
+ brne .Lcopyloop
+
+ /* Now start NuttX */
+
+ call os_start /* Start NuttX */
+ jmp exit
+ .endfunc
+
+/****************************************************************************
+ * Heap Base
+ ****************************************************************************/
+
+ /* This global variable is unsigned long g_heapbase and is
+ * exported from here only because of its coupling to other
+ * uses of _ebss in this file
+ */
+
+ .data
+ .globl g_heapbase
+ .type g_heapbase, object
+g_heapbase:
+ .word _ebss+CONFIG_IDLETHREAD_STACKSIZE
+ .size g_heapbase, .-g_heapbase
+ .end
diff --git a/configs/avr32dev1/README.txt b/configs/avr32dev1/README.txt
index 209ec4f6878c2ff2c9465ae52347706c1871e268..fcd2d9727d14629fb41078aaee318f1c26aa84fd 100755
--- a/configs/avr32dev1/README.txt
+++ b/configs/avr32dev1/README.txt
@@ -120,16 +120,25 @@ Development Environment
GNU Toolchains
^^^^^^^^^^^^^^
-The build logic in these directories assume that you are using the GNU
-toolchain with the Atmel patches. The patch file, pre-patched tool sources,
-and pre-built binaries are available from the Atmel website.
+Atmel Toolchain:
- CONFIG_AVR32_AVRTOOLSW=y # Use the windows version
- CONFIG_AVR32_AVRTOOLSL=y # Ue the Linux version
+ The build logic in these directories assume that you are using the GNU
+ toolchain with the Atmel patches. The patch file, pre-patched tool
+ sources,and pre-built binaries are available from the Atmel website.
-NOTE: The NuttX builtroot cannot be used to build the AVR32 toolchain.
-This is because the Atmel patches that add support for the AVR32 are not
-included in the NuttX buildroot.
+ CONFIG_AVR32_AVRTOOLSW=y # Use the windows version
+ CONFIG_AVR32_AVRTOOLSL=y # Ue the Linux version
+
+ NOTE: The NuttX builtroot cannot be used to build the AVR32 toolchain.
+ This is because the Atmel patches that add support for the AVR32 are not
+ included in the NuttX buildroot.
+
+WinAVR:
+
+ Another option for use under Windows is WinAVR:
+ http://sourceforge.net/projects/winavr/files/. WinAVR includes the
+ AVR32 toolchain as well as the AVR toolchain and various support
+ libraries and header files.
IDEs
^^^^