import usb-device-cdc-serial

5 files changed, 965 insertions, 0 deletions

diff --git a/at91lib/peripherals/tc/tc.h b/at91lib/peripherals/tc/tc.h
new file mode 100644
index 0000000..8bf96e5
--- /dev/null
+++ b/at91lib/peripherals/tc/tc.h
@@ -0,0 +1,74 @@
+/* ----------------------------------------------------------------------------

+ *         ATMEL Microcontroller Software Support 

+ * ----------------------------------------------------------------------------

+ * Copyright (c) 2008, Atmel Corporation

+ *

+ * All rights reserved.

+ *

+ * Redistribution and use in source and binary forms, with or without

+ * modification, are permitted provided that the following conditions are 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.

+ * ----------------------------------------------------------------------------

+ */

+

+//------------------------------------------------------------------------------

+/// \unit

+///

+/// !Purpose

+///

+/// API for configuring and using Timer Counter (TC) peripherals.

+///

+/// !Usage

+/// -# Optionally, use TC_FindMckDivisor() to let the program find the best

+///    TCCLKS field value automatically.

+/// -# Configure a Timer Counter in the desired mode using TC_Configure().

+/// -# Start or stop the timer clock using TC_Start() and TC_Stop().

+//------------------------------------------------------------------------------

+

+#ifndef TC_H

+#define TC_H

+

+//------------------------------------------------------------------------------

+//         Headers

+//------------------------------------------------------------------------------

+

+#include <board.h>

+

+#if !defined(AT91C_ID_TC0) && defined(AT91C_ID_TC012)

+    #define AT91C_ID_TC0 AT91C_ID_TC012

+#endif

+

+//------------------------------------------------------------------------------

+//         Global functions

+//------------------------------------------------------------------------------

+

+extern void TC_Configure(AT91S_TC *pTc, unsigned int mode);

+

+extern void TC_Start(AT91S_TC *pTc);

+

+extern void TC_Stop(AT91S_TC *pTc);

+

+extern unsigned char TC_FindMckDivisor(

+    unsigned int freq,

+    unsigned int mck,

+    unsigned int *div,

+    unsigned int *tcclks);

+

+#endif //#ifndef TC_H

+

diff --git a/usb-device-cdc-serial-project/Makefile b/usb-device-cdc-serial-project/Makefile
new file mode 100644
index 0000000..cf8b126
--- /dev/null
+++ b/usb-device-cdc-serial-project/Makefile
@@ -0,0 +1,163 @@
+# ----------------------------------------------------------------------------

+#         ATMEL Microcontroller Software Support 

+# ----------------------------------------------------------------------------

+# Copyright (c) 2008, Atmel Corporation

+#

+# All rights reserved.

+#

+# Redistribution and use in source and binary forms, with or without

+# modification, are permitted provided that the following conditions are 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.

+# ----------------------------------------------------------------------------

+

+# 	Makefile for compiling the USB CDC serial project

+

+#-------------------------------------------------------------------------------

+#		User-modifiable options

+#-------------------------------------------------------------------------------

+

+# Chip & board used for compilation

+# (can be overriden by adding CHIP=chip and BOARD=board to the command-line)

+CHIP  = at91sam7s256

+BOARD = at91sam7s-ek

+

+# Trace level used for compilation

+# (can be overriden by adding TRACE_LEVEL=#number to the command-line)

+# TRACE_LEVEL_DEBUG      5

+# TRACE_LEVEL_INFO       4

+# TRACE_LEVEL_WARNING    3

+# TRACE_LEVEL_ERROR      2

+# TRACE_LEVEL_FATAL      1

+# TRACE_LEVEL_NO_TRACE   0

+TRACE_LEVEL = 3

+

+# Optimization level, put in comment for debugging

+OPTIMIZATION = -Os

+

+# AT91 library directory

+AT91LIB = ../at91lib

+

+# Output file basename

+OUTPUT = usb-device-cdc-serial-project-$(BOARD)-$(CHIP)

+

+# Compile for all memories available on the board (this sets $(MEMORIES))

+include $(AT91LIB)/boards/$(BOARD)/board.mak

+

+# Output directories

+BIN = bin

+OBJ = obj

+

+#-------------------------------------------------------------------------------

+#		Tools

+#-------------------------------------------------------------------------------

+

+# Tool suffix when cross-compiling

+CROSS_COMPILE = arm-none-eabi-

+

+# Compilation tools

+CC = $(CROSS_COMPILE)gcc

+SIZE = $(CROSS_COMPILE)size

+OBJCOPY = $(CROSS_COMPILE)objcopy

+

+# Flags

+INCLUDES = -I$(AT91LIB)/boards/$(BOARD) -I$(AT91LIB)/peripherals 

+INCLUDES += -I$(AT91LIB)/components -I$(AT91LIB)/usb/device -I$(AT91LIB)

+

+CFLAGS = -Wall -mlong-calls -ffunction-sections

+CFLAGS += -g $(OPTIMIZATION) $(INCLUDES) -D$(CHIP) -DTRACE_LEVEL=$(TRACE_LEVEL)

+ASFLAGS = -g $(OPTIMIZATION) $(INCLUDES) -D$(CHIP) -D__ASSEMBLY__

+LDFLAGS = -g $(OPTIMIZATION) -nostartfiles -Wl,--gc-sections

+

+#-------------------------------------------------------------------------------

+#		Files

+#-------------------------------------------------------------------------------

+

+# Directories where source files can be found

+USB = $(AT91LIB)/usb

+UTILITY = $(AT91LIB)/utility

+PERIPH = $(AT91LIB)/peripherals

+BOARDS = $(AT91LIB)/boards

+

+VPATH += $(USB)/device/cdc-serial $(USB)/device/core $(USB)/common/core

+VPATH += $(USB)/common/cdc

+VPATH += $(UTILITY)

+VPATH += $(PERIPH)/dbgu $(PERIPH)/aic $(PERIPH)/usart $(PERIPH)/pio $(PERIPH)/pmc

+VPATH += $(PERIPH)/cp15

+VPATH += $(BOARDS)/$(BOARD) $(BOARDS)/$(BOARD)/$(CHIP)

+

+# Objects built from C source files

+C_OBJECTS = main.o

+C_OBJECTS += CDCDSerialDriver.o CDCDSerialDriverDescriptors.o

+C_OBJECTS += CDCSetControlLineStateRequest.o CDCLineCoding.o

+C_OBJECTS += USBD_OTGHS.o USBD_UDP.o USBD_UDPHS.o USBDDriver.o

+C_OBJECTS += USBDCallbacks_Initialized.o

+C_OBJECTS += USBDCallbacks_Reset.o

+#C_OBJECTS += USBDCallbacks_Resumed.o

+#C_OBJECTS += USBDCallbacks_Suspended.o

+C_OBJECTS += USBDDriverCb_CfgChanged.o

+C_OBJECTS += USBDDriverCb_IfSettingChanged.o

+C_OBJECTS += USBSetAddressRequest.o USBGenericDescriptor.o USBInterfaceRequest.o

+C_OBJECTS += USBGenericRequest.o USBGetDescriptorRequest.o 

+C_OBJECTS += USBSetConfigurationRequest.o USBFeatureRequest.o

+C_OBJECTS += USBEndpointDescriptor.o USBConfigurationDescriptor.o

+C_OBJECTS += led.o string.o stdio.o

+C_OBJECTS += aic.o dbgu.o usart.o pio.o pio_it.o pmc.o cp15.o

+C_OBJECTS += board_memories.o board_lowlevel.o

+

+# Objects built from Assembly source files

+ASM_OBJECTS = board_cstartup.o

+ASM_OBJECTS += cp15_asm.o

+

+# Append OBJ and BIN directories to output filename

+OUTPUT := $(BIN)/$(OUTPUT)

+

+#-------------------------------------------------------------------------------

+#		Rules

+#-------------------------------------------------------------------------------

+

+all: $(BIN) $(OBJ) $(MEMORIES)

+

+$(BIN) $(OBJ):

+	mkdir $@

+

+define RULES

+C_OBJECTS_$(1) = $(addprefix $(OBJ)/$(1)_, $(C_OBJECTS))

+ASM_OBJECTS_$(1) = $(addprefix $(OBJ)/$(1)_, $(ASM_OBJECTS))

+

+$(1): $$(ASM_OBJECTS_$(1)) $$(C_OBJECTS_$(1))

+	$(CC) $(LDFLAGS) -T"$(AT91LIB)/boards/$(BOARD)/$(CHIP)/$$@.lds" -o $(OUTPUT)-$$@.elf $$^

+	$(OBJCOPY) -O binary $(OUTPUT)-$$@.elf $(OUTPUT)-$$@.bin

+	$(SIZE) $$^ $(OUTPUT)-$$@.elf

+

+$$(C_OBJECTS_$(1)): $(OBJ)/$(1)_%.o: %.c Makefile $(OBJ) $(BIN)

+	$(CC) $(CFLAGS) -D$(1) -c -o $$@ $$<

+

+$$(ASM_OBJECTS_$(1)): $(OBJ)/$(1)_%.o: %.S Makefile $(OBJ) $(BIN)

+	$(CC) $(ASFLAGS) -D$(1) -c -o $$@ $$<

+

+debug_$(1): $(1)

+	perl ../resources/gdb/debug.pl $(OUTPUT)-$(1).elf

+

+endef

+

+$(foreach MEMORY, $(MEMORIES), $(eval $(call RULES,$(MEMORY))))

+

+clean:

+	-rm -f $(OBJ)/*.o $(BIN)/*.bin $(BIN)/*.elf

+

diff --git a/usb-device-cdc-serial-project/bin/.empty b/usb-device-cdc-serial-project/bin/.empty
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/usb-device-cdc-serial-project/bin/.empty
diff --git a/usb-device-cdc-serial-project/main.c b/usb-device-cdc-serial-project/main.c
new file mode 100644
index 0000000..1f4e1e7
--- /dev/null
+++ b/usb-device-cdc-serial-project/main.c
@@ -0,0 +1,728 @@
+/* ----------------------------------------------------------------------------

+ *         ATMEL Microcontroller Software Support 

+ * ----------------------------------------------------------------------------

+ * Copyright (c) 2008, Atmel Corporation

+ *

+ * All rights reserved.

+ *

+ * Redistribution and use in source and binary forms, with or without

+ * modification, are permitted provided that the following conditions are 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.

+ * ----------------------------------------------------------------------------

+ */

+

+//-----------------------------------------------------------------------------

+/// \dir "USB CDC serial converter"

+///

+/// !!!Purpose

+///

+/// The USB CDC Serial Project will help you to get familiar with the

+/// USB Device Port(UDP) and USART interface on AT91SAM microcontrollers. Also

+/// it can help you to be familiar with the USB Framework that is used for

+/// rapid development of USB-compliant class drivers such as USB Communication

+/// Device class (CDC).

+///

+/// You can find following information depends on your needs:

+/// - Sample usage of USB CDC driver and USART driver.

+/// - USB CDC driver development based on the AT91 USB Framework.

+/// - USB enumerate sequence, the standard and class-specific descriptors and

+///   requests handling.

+/// - The initialize sequence and usage of UDP interface.

+/// - The initialize sequence and usage of USART interface with PDC.

+///

+/// !See

+/// - usart: USART interface driver

+/// - tc: TIMER/COUNTER interface driver

+/// - usb: USB Framework, USB CDC driver and UDP interface driver

+///    - "AT91 USB device framework"

+///       - "USBD API"

+///    - "cdc-serial"

+///       - "USB CDC Serial Device"

+///       - "USB CDC Serial Host Driver"

+///

+/// !!!Requirements

+///

+/// This package can be used with all Atmel evaluation kits that have both

+/// UDP and USART interface.

+///

+/// The current supported board list:

+/// - at91sam7s-ek (exclude at91sam7s32)

+/// - at91sam7x-ek

+/// - at91sam7xc-ek

+/// - at91sam7a3-ek

+/// - at91sam7se-ek

+/// - at91sam9260-ek

+/// - at91sam9263-ek

+///

+/// !!!Description

+///

+/// When an EK running this program connected to a host (PC for example), with

+/// USB cable, the EK appears as a Seriao COM port for the host, after driver

+/// installation with the offered 6119.inf. Then the host can send or receive

+/// data through the port with host software. The data stream from the host is

+/// then sent to the EK, and forward to USART port of AT91SAM chips. The USART

+/// port of the EK is monitored by the timer and the incoming data will be sent

+/// to the host.

+///

+/// !!!Usage

+///

+/// -# Build the program and download it inside the evaluation board. Please

+///    refer to the

+///    <a href="http://www.atmel.com/dyn/resources/prod_documents/doc6224.pdf">

+///    SAM-BA User Guide</a>, the

+///    <a href="http://www.atmel.com/dyn/resources/prod_documents/doc6310.pdf">

+///    GNU-Based Software Development</a> application note or to the

+///    <a href="ftp://ftp.iar.se/WWWfiles/arm/Guides/EWARM_UserGuide.ENU.pdf">

+///    IAR EWARM User Guide</a>, depending on your chosen solution.

+/// -# On the computer, open and configure a terminal application

+///    (e.g. HyperTerminal on Microsoft Windows) with these settings:

+///   - 115200 bauds

+///   - 8 bits of data

+///   - No parity

+///   - 1 stop bit

+///   - No flow control

+/// -# Start the application.

+/// -# In the terminal window, the following text should appear:

+///     \code

+///     -- USB Device CDC Serial Project xxx --

+///     -- AT91xxxxxx-xx

+///     -- Compiled: xxx xx xxxx xx:xx:xx --

+///     \endcode

+/// -# When connecting USB cable to windows, the LED blinks, and the host

+///    reports a new USB %device attachment (if it's the first time you connect

+///    an %audio speaker demo board to your host). You can use the inf file

+///    at91lib\\usb\\device\\cdc-serial\\drv\\6119.inf to install the serial

+///    port. Then new "AT91 USB to Serial Converter (COMx)" appears in the

+///    hardware %device list.

+/// -# You can run hyperterminal to send data to the port. And it can be seen

+///    at the other hyperterminal connected to the USART port of the EK.

+///

+//-----------------------------------------------------------------------------

+

+//-----------------------------------------------------------------------------

+/// \unit

+///

+/// !Purpose

+///

+/// This file contains all the specific code for the

+/// usb-device-cdc-serial-project

+///

+/// !Contents

+///

+/// The code can be roughly broken down as follows:

+///    - Configuration functions

+///       - VBus_Configure

+///       - PIO & Timer configurations in start of main

+///    - Interrupt handlers

+///       - ISR_Vbus

+///       - ISR_Timer0

+///       - ISR_Usart0

+///    - Callback functions

+///       - UsbDataReceived

+///    - The main function, which implements the program behavior

+///

+/// Please refer to the list of functions in the #Overview# tab of this unit

+/// for more detailed information.

+//-----------------------------------------------------------------------------

+

+//-----------------------------------------------------------------------------

+//         Headers

+//------------------------------------------------------------------------------

+

+#include <board.h>

+#include <pio/pio.h>

+#include <pio/pio_it.h>

+#include <aic/aic.h>

+#include <tc/tc.h>

+#include <usart/usart.h>

+#include <utility/trace.h>

+#include <utility/led.h>

+#include <usb/device/cdc-serial/CDCDSerialDriver.h>

+#include <usb/device/cdc-serial/CDCDSerialDriverDescriptors.h>

+#include <pmc/pmc.h>

+

+//------------------------------------------------------------------------------

+//      Definitions

+//------------------------------------------------------------------------------

+#ifndef AT91C_ID_TC0

+    #define AT91C_ID_TC0 AT91C_ID_TC

+#endif

+

+/// Size in bytes of the buffer used for reading data from the USB & USART

+#define DATABUFFERSIZE \

+    BOARD_USB_ENDPOINTS_MAXPACKETSIZE(CDCDSerialDriverDescriptors_DATAIN)

+

+/// Use for power management

+#define STATE_IDLE    0

+/// The USB device is in suspend state

+#define STATE_SUSPEND 4

+/// The USB device is in resume state

+#define STATE_RESUME  5

+

+//------------------------------------------------------------------------------

+//      Internal variables

+//------------------------------------------------------------------------------

+/// State of USB, for suspend and resume

+unsigned char USBState = STATE_IDLE;

+

+/// List of pins that must be configured for use by the application.

+static const Pin pins[] = {PIN_USART0_TXD, PIN_USART0_RXD};

+

+/// Double-buffer for storing incoming USART data.

+static unsigned char usartBuffers[2][DATABUFFERSIZE];

+

+/// Current USART buffer index.

+static unsigned char usartCurrentBuffer = 0;

+

+/// Buffer for storing incoming USB data.

+static unsigned char usbBuffer[DATABUFFERSIZE];

+

+//------------------------------------------------------------------------------

+//         VBus monitoring (optional)

+//------------------------------------------------------------------------------

+#if defined(PIN_USB_VBUS)

+

+#define VBUS_CONFIGURE()  VBus_Configure()

+

+/// VBus pin instance.

+static const Pin pinVbus = PIN_USB_VBUS;

+

+//------------------------------------------------------------------------------

+/// Handles interrupts coming from PIO controllers.

+//------------------------------------------------------------------------------

+static void ISR_Vbus(const Pin *pPin)

+{

+    // Check current level on VBus

+    if (PIO_Get(&pinVbus)) {

+

+        TRACE_INFO("VBUS conn\n\r");

+        USBD_Connect();

+    }

+    else {

+

+        TRACE_INFO("VBUS discon\n\r");

+        USBD_Disconnect();

+    }

+}

+

+//------------------------------------------------------------------------------

+/// Configures the VBus pin to trigger an interrupt when the level on that pin

+/// changes.

+//------------------------------------------------------------------------------

+static void VBus_Configure( void )

+{

+    TRACE_INFO("VBus configuration\n\r");

+

+    // Configure PIO

+    PIO_Configure(&pinVbus, 1);

+    PIO_ConfigureIt(&pinVbus, ISR_Vbus);

+    PIO_EnableIt(&pinVbus);

+

+    // Check current level on VBus

+    if (PIO_Get(&pinVbus)) {

+

+        // if VBUS present, force the connect

+        TRACE_INFO("VBUS conn\n\r");

+        USBD_Connect();

+    }

+    else {

+        USBD_Disconnect();

+    }           

+}

+

+#else

+    #define VBUS_CONFIGURE()    USBD_Connect()

+#endif //#if defined(PIN_USB_VBUS)

+

+#if defined (CP15_PRESENT)

+//------------------------------------------------------------------------------

+/// Put the CPU in 32kHz, disable PLL, main oscillator

+/// Put voltage regulator in standby mode

+//------------------------------------------------------------------------------

+void LowPowerMode(void)

+{

+    PMC_CPUInIdleMode();

+}

+//------------------------------------------------------------------------------

+/// Put voltage regulator in normal mode

+/// Return the CPU to normal speed 48MHz, enable PLL, main oscillator

+//------------------------------------------------------------------------------

+void NormalPowerMode(void)

+{

+}

+

+#elif defined(at91sam7a3)

+//------------------------------------------------------------------------------

+/// Put the CPU in 32kHz, disable PLL, main oscillator

+//------------------------------------------------------------------------------

+void LowPowerMode(void)

+{

+    // MCK=48MHz to MCK=32kHz

+    // MCK = SLCK/2 : change source first from 48 000 000 to 18. / 2 = 9M

+    AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_PRES_CLK_2;

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) );

+    // MCK=SLCK : then change prescaler

+    AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_CSS_SLOW_CLK;

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) );

+    // disable PLL

+    AT91C_BASE_PMC->PMC_PLLR = 0;

+    // Disable Main Oscillator

+    AT91C_BASE_PMC->PMC_MOR = 0;

+

+    PMC_DisableProcessorClock();

+}

+//------------------------------------------------------------------------------

+/// Return the CPU to normal speed 48MHz, enable PLL, main oscillator

+//------------------------------------------------------------------------------

+void NormalPowerMode(void)

+{

+    // MCK=32kHz to MCK=48MHz

+    // enable Main Oscillator

+    AT91C_BASE_PMC->PMC_MOR = (( (AT91C_CKGR_OSCOUNT & (0x06 <<8)) | AT91C_CKGR_MOSCEN ));

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MOSCS ) );

+

+    // enable PLL@96MHz

+    AT91C_BASE_PMC->PMC_PLLR = ((AT91C_CKGR_DIV & 0x0E) |

+         (AT91C_CKGR_PLLCOUNT & (28<<8)) |

+         (AT91C_CKGR_MUL & (0x48<<16)));

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_LOCK ) );

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) );

+    AT91C_BASE_CKGR->CKGR_PLLR |= AT91C_CKGR_USBDIV_1 ;

+    // MCK=SLCK/2 : change prescaler first

+    AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_PRES_CLK_2;

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) );

+    // MCK=PLLCK/2 : then change source

+    AT91C_BASE_PMC->PMC_MCKR |= AT91C_PMC_CSS_PLL_CLK  ;

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) );

+}

+

+#elif defined (at91sam7se)

+//------------------------------------------------------------------------------

+/// Put the CPU in 32kHz, disable PLL, main oscillator

+/// Put voltage regulator in standby mode

+//------------------------------------------------------------------------------

+void LowPowerMode(void)

+{

+    // MCK=48MHz to MCK=32kHz

+    // MCK = SLCK/2 : change source first from 48 000 000 to 18. / 2 = 9M

+    AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_PRES_CLK_2;

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) );

+    // MCK=SLCK : then change prescaler

+    AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_CSS_SLOW_CLK;

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) );

+    // disable PLL

+    AT91C_BASE_PMC->PMC_PLLR = 0;

+    // Disable Main Oscillator

+    AT91C_BASE_PMC->PMC_MOR = 0;

+

+    // Voltage regulator in standby mode : Enable VREG Low Power Mode

+    AT91C_BASE_VREG->VREG_MR |= AT91C_VREG_PSTDBY;

+

+    PMC_DisableProcessorClock();

+}

+//------------------------------------------------------------------------------

+/// Put voltage regulator in normal mode

+/// Return the CPU to normal speed 48MHz, enable PLL, main oscillator

+//------------------------------------------------------------------------------

+void NormalPowerMode(void)

+{

+    // Voltage regulator in normal mode : Disable VREG Low Power Mode

+    AT91C_BASE_VREG->VREG_MR &= ~AT91C_VREG_PSTDBY;

+

+    // MCK=32kHz to MCK=48MHz

+    // enable Main Oscillator

+    AT91C_BASE_PMC->PMC_MOR = (( (AT91C_CKGR_OSCOUNT & (0x06 <<8)) | AT91C_CKGR_MOSCEN ));

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MOSCS ) );

+

+    // enable PLL@96MHz

+    AT91C_BASE_PMC->PMC_PLLR = ((AT91C_CKGR_DIV & 0x0E) |

+         (AT91C_CKGR_PLLCOUNT & (28<<8)) |

+         (AT91C_CKGR_MUL & (0x48<<16)));

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_LOCK ) );

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) );

+    AT91C_BASE_CKGR->CKGR_PLLR |= AT91C_CKGR_USBDIV_1 ;

+    // MCK=SLCK/2 : change prescaler first

+    AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_PRES_CLK_2;

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) );

+    // MCK=PLLCK/2 : then change source

+    AT91C_BASE_PMC->PMC_MCKR |= AT91C_PMC_CSS_PLL_CLK  ;

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) );

+}

+

+#elif defined (at91sam7s)

+//------------------------------------------------------------------------------

+/// Put the CPU in 32kHz, disable PLL, main oscillator

+/// Put voltage regulator in standby mode

+//------------------------------------------------------------------------------

+void LowPowerMode(void)

+{

+    // MCK=48MHz to MCK=32kHz

+    // MCK = SLCK/2 : change source first from 48 000 000 to 18. / 2 = 9M

+    AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_PRES_CLK_2;

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) );

+    // MCK=SLCK : then change prescaler

+    AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_CSS_SLOW_CLK;

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) );

+    // disable PLL

+    AT91C_BASE_PMC->PMC_PLLR = 0;

+    // Disable Main Oscillator

+    AT91C_BASE_PMC->PMC_MOR = 0;

+

+    // Voltage regulator in standby mode : Enable VREG Low Power Mode

+    AT91C_BASE_VREG->VREG_MR |= AT91C_VREG_PSTDBY;

+

+    PMC_DisableProcessorClock();

+}

+

+//------------------------------------------------------------------------------

+/// Put voltage regulator in normal mode

+/// Return the CPU to normal speed 48MHz, enable PLL, main oscillator

+//------------------------------------------------------------------------------

+void NormalPowerMode(void)

+{

+    // Voltage regulator in normal mode : Disable VREG Low Power Mode

+    AT91C_BASE_VREG->VREG_MR &= ~AT91C_VREG_PSTDBY;

+

+    // MCK=32kHz to MCK=48MHz

+    // enable Main Oscillator

+    AT91C_BASE_PMC->PMC_MOR = (( (AT91C_CKGR_OSCOUNT & (0x06 <<8)) | AT91C_CKGR_MOSCEN ));

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MOSCS ) );

+

+    // enable PLL@96MHz

+    AT91C_BASE_PMC->PMC_PLLR = ((AT91C_CKGR_DIV & 0x0E) |

+         (AT91C_CKGR_PLLCOUNT & (28<<8)) |

+         (AT91C_CKGR_MUL & (0x48<<16)));

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_LOCK ) );

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) );

+    AT91C_BASE_CKGR->CKGR_PLLR |= AT91C_CKGR_USBDIV_1 ;

+    // MCK=SLCK/2 : change prescaler first

+    AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_PRES_CLK_2;

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) );

+    // MCK=PLLCK/2 : then change source

+    AT91C_BASE_PMC->PMC_MCKR |= AT91C_PMC_CSS_PLL_CLK  ;

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) );

+

+}

+

+#elif defined (at91sam7x) || defined (at91sam7xc)

+//------------------------------------------------------------------------------

+/// Put the CPU in 32kHz, disable PLL, main oscillator

+/// Put voltage regulator in standby mode

+//------------------------------------------------------------------------------

+void LowPowerMode(void)

+{

+    // MCK=48MHz to MCK=32kHz

+    // MCK = SLCK/2 : change source first from 48 000 000 to 18. / 2 = 9M

+    AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_PRES_CLK_2;

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) );

+    // MCK=SLCK : then change prescaler

+    AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_CSS_SLOW_CLK;

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) );

+    // disable PLL

+    AT91C_BASE_PMC->PMC_PLLR = 0;

+    // Disable Main Oscillator

+    AT91C_BASE_PMC->PMC_MOR = 0;

+

+    // Voltage regulator in standby mode : Enable VREG Low Power Mode

+    AT91C_BASE_VREG->VREG_MR |= AT91C_VREG_PSTDBY;

+

+    PMC_DisableProcessorClock();

+}

+

+//------------------------------------------------------------------------------

+/// Put voltage regulator in normal mode

+/// Return the CPU to normal speed 48MHz, enable PLL, main oscillator

+//------------------------------------------------------------------------------

+void NormalPowerMode(void)

+{

+    // Voltage regulator in normal mode : Disable VREG Low Power Mode

+    AT91C_BASE_VREG->VREG_MR &= ~AT91C_VREG_PSTDBY;

+

+    // MCK=32kHz to MCK=48MHz

+    // enable Main Oscillator

+    AT91C_BASE_PMC->PMC_MOR = (( (AT91C_CKGR_OSCOUNT & (0x06 <<8)) | AT91C_CKGR_MOSCEN ));

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MOSCS ) );

+

+    // enable PLL@96MHz

+    AT91C_BASE_PMC->PMC_PLLR = ((AT91C_CKGR_DIV & 0x0E) |

+         (AT91C_CKGR_PLLCOUNT & (28<<8)) |

+         (AT91C_CKGR_MUL & (0x48<<16)));

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_LOCK ) );

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) );

+    AT91C_BASE_CKGR->CKGR_PLLR |= AT91C_CKGR_USBDIV_1 ;

+    // MCK=SLCK/2 : change prescaler first

+    AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_PRES_CLK_2;

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) );

+    // MCK=PLLCK/2 : then change source

+    AT91C_BASE_PMC->PMC_MCKR |= AT91C_PMC_CSS_PLL_CLK  ;

+    while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) );

+}

+

+#endif

+

+//------------------------------------------------------------------------------

+//         Internal functions

+//------------------------------------------------------------------------------

+

+//------------------------------------------------------------------------------

+/// Handles interrupts coming from Timer #0.

+//------------------------------------------------------------------------------

+static void ISR_Timer0()

+{

+    unsigned char size;

+    unsigned int status = AT91C_BASE_TC0->TC_SR;

+

+    if ((status & AT91C_TC_CPCS) != 0) {

+    

+        // Flush PDC buffer

+        size = DATABUFFERSIZE - AT91C_BASE_US0->US_RCR;

+        if (size == 0) {

+

+            AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;

+            return;

+        }

+        AT91C_BASE_US0->US_RCR = 0;

+    

+        // Send current buffer through the USB

+        while (CDCDSerialDriver_Write(usartBuffers[usartCurrentBuffer],

+                                      size, 0, 0) != USBD_STATUS_SUCCESS);

+    

+        // Restart read on buffer

+        USART_ReadBuffer(AT91C_BASE_US0,

+                         usartBuffers[usartCurrentBuffer],

+                         DATABUFFERSIZE);

+        usartCurrentBuffer = 1 - usartCurrentBuffer;

+        AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;

+    }

+}

+

+

+//------------------------------------------------------------------------------

+//         Callbacks re-implementation

+//------------------------------------------------------------------------------

+//------------------------------------------------------------------------------

+/// Invoked when the USB device leaves the Suspended state. By default,

+/// configures the LEDs.

+//------------------------------------------------------------------------------

+void USBDCallbacks_Resumed(void)

+{

+    // Initialize LEDs

+    LED_Configure(USBD_LEDPOWER);

+    LED_Set(USBD_LEDPOWER);

+    LED_Configure(USBD_LEDUSB);

+    LED_Clear(USBD_LEDUSB);

+    USBState = STATE_RESUME;

+}

+

+//------------------------------------------------------------------------------

+/// Invoked when the USB device gets suspended. By default, turns off all LEDs.

+//------------------------------------------------------------------------------

+void USBDCallbacks_Suspended(void)

+{

+    // Turn off LEDs

+    LED_Clear(USBD_LEDPOWER);

+    LED_Clear(USBD_LEDUSB);

+    USBState = STATE_SUSPEND;

+}

+

+

+//------------------------------------------------------------------------------

+/// Callback invoked when data has been received on the USB.

+//------------------------------------------------------------------------------

+static void UsbDataReceived(unsigned int unused,

+                            unsigned char status,

+                            unsigned int received,

+                            unsigned int remaining)

+{

+    // Check that data has been received successfully

+    if (status == USBD_STATUS_SUCCESS) {

+

+        // Send data through USART

+        while (!USART_WriteBuffer(AT91C_BASE_US0, usbBuffer, received));

+        AT91C_BASE_US0->US_IER = AT91C_US_TXBUFE;

+

+        // Check if bytes have been discarded

+        if ((received == DATABUFFERSIZE) && (remaining > 0)) {

+

+            TRACE_WARNING(

+                      "UsbDataReceived: %u bytes discarded\n\r",

+                      remaining);

+        }

+    }

+    else {

+

+        TRACE_WARNING( "UsbDataReceived: Transfer error\n\r");

+    }

+}

+

+//------------------------------------------------------------------------------

+/// Handles interrupts coming from USART #0.

+//------------------------------------------------------------------------------

+static void ISR_Usart0()

+{

+    unsigned int status = AT91C_BASE_US0->US_CSR;

+    unsigned short serialState;

+

+    // If USB device is not configured, do nothing

+    if (USBD_GetState() != USBD_STATE_CONFIGURED) {

+

+        AT91C_BASE_US0->US_IDR = 0xFFFFFFFF;

+        return;

+    }

+

+    // Buffer has been read successfully

+    if ((status & AT91C_US_ENDRX) != 0) {

+

+        // Disable timer

+        AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS;

+

+        // Send buffer through the USB

+        while (CDCDSerialDriver_Write(usartBuffers[usartCurrentBuffer],

+                                      DATABUFFERSIZE, 0, 0) != USBD_STATUS_SUCCESS);

+

+        // Restart read on buffer

+        USART_ReadBuffer(AT91C_BASE_US0,

+                         usartBuffers[usartCurrentBuffer],

+                         DATABUFFERSIZE);

+        usartCurrentBuffer = 1 - usartCurrentBuffer;

+

+        // Restart timer

+        AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;

+    }

+

+    // Buffer has been sent

+    if ((status & AT91C_US_TXBUFE) != 0) {

+

+        // Restart USB read

+        CDCDSerialDriver_Read(usbBuffer,

+                              DATABUFFERSIZE,

+                              (TransferCallback) UsbDataReceived,

+                              0);

+        AT91C_BASE_US0->US_IDR = AT91C_US_TXBUFE;

+    }

+

+    // Errors

+    serialState = CDCDSerialDriver_GetSerialState();

+

+    // Overrun

+    if ((status & AT91C_US_OVER) != 0) {

+

+        TRACE_WARNING( "ISR_Usart0: Overrun\n\r");

+        serialState |= CDCDSerialDriver_STATE_OVERRUN;

+    }

+

+    // Framing error

+    if ((status & AT91C_US_FRAME) != 0) {

+

+        TRACE_WARNING( "ISR_Usart0: Framing error\n\r");

+        serialState |= CDCDSerialDriver_STATE_FRAMING;

+    }

+

+    CDCDSerialDriver_SetSerialState(serialState);

+}

+

+//------------------------------------------------------------------------------

+//          Main

+//------------------------------------------------------------------------------

+

+//------------------------------------------------------------------------------

+/// Initializes drivers and start the USB <-> Serial bridge.

+//------------------------------------------------------------------------------

+int main()

+{

+    TRACE_CONFIGURE(DBGU_STANDARD, 115200, BOARD_MCK);

+    printf("-- USB Device CDC Serial Project %s --\n\r", SOFTPACK_VERSION);

+    printf("-- %s\n\r", BOARD_NAME);

+    printf("-- Compiled: %s %s --\n\r", __DATE__, __TIME__);

+

+    // If they are present, configure Vbus & Wake-up pins

+    PIO_InitializeInterrupts(0);

+

+    // Configure USART

+    PIO_Configure(pins, PIO_LISTSIZE(pins));

+    AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_US0;

+    AT91C_BASE_US0->US_IDR = 0xFFFFFFFF;

+    USART_Configure(AT91C_BASE_US0,

+                    USART_MODE_ASYNCHRONOUS,

+                    115200,

+                    BOARD_MCK);

+    USART_SetTransmitterEnabled(AT91C_BASE_US0, 1);

+    USART_SetReceiverEnabled(AT91C_BASE_US0, 1);

+    AIC_ConfigureIT(AT91C_ID_US0, 0, ISR_Usart0);

+    AIC_EnableIT(AT91C_ID_US0);

+

+    // Configure timer 0

+    AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_TC0);

+    AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS;

+    AT91C_BASE_TC0->TC_IDR = 0xFFFFFFFF;

+    AT91C_BASE_TC0->TC_CMR = AT91C_TC_CLKS_TIMER_DIV5_CLOCK

+                             | AT91C_TC_CPCSTOP

+                             | AT91C_TC_CPCDIS

+                             | AT91C_TC_WAVESEL_UP_AUTO

+                             | AT91C_TC_WAVE;

+    AT91C_BASE_TC0->TC_RC = 0x00FF;

+    AT91C_BASE_TC0->TC_IER = AT91C_TC_CPCS;

+    AIC_ConfigureIT(AT91C_ID_TC0, 0, ISR_Timer0);

+    AIC_EnableIT(AT91C_ID_TC0);

+

+    // BOT driver initialization

+    CDCDSerialDriver_Initialize();

+

+    // connect if needed

+    VBUS_CONFIGURE();

+

+    // Driver loop

+    while (1) {

+

+        // Device is not configured

+        if (USBD_GetState() < USBD_STATE_CONFIGURED) {

+

+            // Connect pull-up, wait for configuration

+            USBD_Connect();

+            while (USBD_GetState() < USBD_STATE_CONFIGURED);

+

+            // Start receiving data on the USART

+            usartCurrentBuffer = 0;

+            USART_ReadBuffer(AT91C_BASE_US0, usartBuffers[0], DATABUFFERSIZE);

+            USART_ReadBuffer(AT91C_BASE_US0, usartBuffers[1], DATABUFFERSIZE);

+            AT91C_BASE_US0->US_IER = AT91C_US_ENDRX

+                                     | AT91C_US_FRAME

+                                     | AT91C_US_OVER;

+            AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;

+

+            // Start receiving data on the USB

+            CDCDSerialDriver_Read(usbBuffer,

+                                  DATABUFFERSIZE,

+                                  (TransferCallback) UsbDataReceived,

+                                  0);

+        }

+        if( USBState == STATE_SUSPEND ) {

+            TRACE_DEBUG("suspend  !\n\r");

+            LowPowerMode();

+            USBState = STATE_IDLE;

+        }

+        if( USBState == STATE_RESUME ) {

+            // Return in normal MODE

+            TRACE_DEBUG("resume !\n\r");

+            NormalPowerMode();

+            USBState = STATE_IDLE;

+        }

+    }

+}

+

diff --git a/usb-device-cdc-serial-project/obj/.empty b/usb-device-cdc-serial-project/obj/.empty
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/usb-device-cdc-serial-project/obj/.empty