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-rw-r--r--usb-device-audio-looprec-project/Makefile239
-rw-r--r--usb-device-audio-looprec-project/bin/.empty_dir0
-rw-r--r--usb-device-audio-looprec-project/main.c449
-rw-r--r--usb-device-audio-looprec-project/obj/.empty_dir0
4 files changed, 688 insertions, 0 deletions
diff --git a/usb-device-audio-looprec-project/Makefile b/usb-device-audio-looprec-project/Makefile
new file mode 100644
index 0000000..497fb8e
--- /dev/null
+++ b/usb-device-audio-looprec-project/Makefile
@@ -0,0 +1,239 @@
+# ----------------------------------------------------------------------------
+# 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-device-core-project project
+
+#-------------------------------------------------------------------------------
+# User-modifiable options
+#-------------------------------------------------------------------------------
+
+# Chip & board used for compilation
+# (can be overriden by adding CHIP=chip and BOARD=board to the command-line)
+CHIP = at91sam3u4
+BOARD = at91sam3u-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 = 4
+
+# Optimization level, put in comment for debugging
+OPTIMIZATION = -Os
+
+# AT91 library directory
+AT91LIB = ../../at91lib
+
+# External library
+EXT_LIBS= ../external_libs
+
+# Output file basename
+OUTPUT = usb-device-core-project-$(BOARD)-$(CHIP)
+
+# Compile with chip specific features
+include $(AT91LIB)/boards/$(BOARD)/$(CHIP)/chip.mak
+
+# 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
+STRIP = $(CROSS_COMPILE)strip
+OBJCOPY = $(CROSS_COMPILE)objcopy
+
+# Flags
+INCLUDES += -I$(AT91LIB)/boards/$(BOARD)
+INCLUDES += -I$(AT91LIB)/peripherals
+INCLUDES += -I$(AT91LIB)/components
+INCLUDES += -I$(AT91LIB)/drivers
+INCLUDES += -I$(AT91LIB)
+INCLUDES += -I$(EXT_LIBS)
+INCLUDES += -I$(EXT_LIBS)/cmsis
+
+ifeq ($(CHIP_CORE), cortexm3)
+TARGET_OPTS = -mcpu=cortex-m3 -mthumb
+else
+TARGET_OPTS =
+endif
+
+CFLAGS += $(TARGET_OPTS)
+CFLAGS += -Wall -mlong-calls -ffunction-sections
+CFLAGS += -g $(OPTIMIZATION) $(INCLUDES) -D$(CHIP) -DTRACE_LEVEL=$(TRACE_LEVEL)
+ASFLAGS = $(TARGET_OPTS) -Wall -g $(OPTIMIZATION) $(INCLUDES) -D$(CHIP) -D__ASSEMBLY__
+LDFLAGS = -g $(OPTIMIZATION) -nostartfiles $(TARGET_OPTS) -Wl,--gc-sections
+
+#-------------------------------------------------------------------------------
+# Files
+#-------------------------------------------------------------------------------
+
+# Directories where source files can be found
+PERIPH = $(AT91LIB)/peripherals
+BOARDS = $(AT91LIB)/boards
+UTILITY = $(AT91LIB)/utility
+COMP = $(AT91LIB)/components
+DRIVER = $(AT91LIB)/drivers
+USB = $(AT91LIB)/usb
+
+VPATH += $(UTILITY)
+VPATH += $(PERIPH)/dbgu
+VPATH += $(PERIPH)/pio
+VPATH += $(PERIPH)/irq
+VPATH += $(PERIPH)/ssc
+VPATH += $(PERIPH)/twi
+VPATH += $(PERIPH)/pmc
+VPATH += $(PERIPH)/cp15
+VPATH += $(BOARDS)/$(BOARD)
+VPATH += $(BOARDS)/$(BOARD)/$(CHIP)
+VPATH += $(DRIVER)/twi
+VPATH += $(PERIPH)/mci
+VPATH += $(PERIPH)/dma
+VPATH += $(DRIVER)/dmad
+VPATH += $(EXT_LIBS)/cmsis
+
+VPATH += $(USB)/device/audio-looprec
+VPATH += $(USB)/device/core
+VPATH += $(USB)/common/core
+VPATH += $(USB)/common/audio
+
+# Objects built from C source files
+C_OBJECTS += main.o
+C_OBJECTS += USBD_UDPHS.o
+C_OBJECTS += USBDDriver.o
+C_OBJECTS += USBDCallbacks_Initialized.o
+C_OBJECTS += USBDCallbacks_Reset.o
+#C_OBJECTS += USBDCallbacks_Resumed.o
+#C_OBJECTS += USBDCallbacks_Suspended.o
+C_OBJECTS += USBDDriverCb_CfgChanged.o
+#C_OBJECTS += USBDDriverCb_IfSettingChanged.o
+C_OBJECTS += USBInterfaceRequest.o
+C_OBJECTS += USBFeatureRequest.o
+C_OBJECTS += USBGenericRequest.o
+C_OBJECTS += USBGetDescriptorRequest.o
+C_OBJECTS += USBSetAddressRequest.o
+C_OBJECTS += USBSetConfigurationRequest.o
+C_OBJECTS += USBGenericDescriptor.o
+C_OBJECTS += USBConfigurationDescriptor.o
+C_OBJECTS += USBEndpointDescriptor.o
+C_OBJECTS += dbgu.o
+C_OBJECTS += pio.o
+C_OBJECTS += pio_it.o
+C_OBJECTS += ssc.o
+C_OBJECTS += twi.o
+C_OBJECTS += pmc.o
+C_OBJECTS += led.o
+C_OBJECTS += twid.o
+C_OBJECTS += string.o
+C_OBJECTS += stdio.o
+C_OBJECTS += math.o
+C_OBJECTS += trace.o
+C_OBJECTS += board_memories.o
+C_OBJECTS += board_lowlevel.o
+
+C_OBJECTS += AUDGenericRequest.o AUDFeatureUnitRequest.o
+C_OBJECTS += AUDDLoopRecChannel.o AUDDLoopRecDriver.o
+C_OBJECTS += AUDDLoopRecDriverDescriptors.o
+
+
+# Objects for different chips
+ifeq ($(CHIP_CORE), cortexm3)
+C_OBJECTS += nvic.o
+C_OBJECTS += exceptions.o
+C_OBJECTS += board_cstartup_gnu.o
+C_OBJECTS += core_cm3.o
+else
+C_OBJECTS += aic.o
+C_OBJECTS += cp15.o
+endif
+
+ifeq ($(CHIP_IP_MCI), MCI_DMA)
+C_OBJECTS += dmad.o
+C_OBJECTS += dma.o
+C_OBJECTS += mci_hs.o
+else
+C_OBJECTS += mci.o
+endif
+
+# Objects built from Assembly source files
+ifneq ($(CHIP_CORE), cortexm3)
+ASM_OBJECTS += board_cstartup.o
+ASM_OBJECTS += cp15_asm.o
+endif
+
+# 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-audio-looprec-project/bin/.empty_dir b/usb-device-audio-looprec-project/bin/.empty_dir
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/usb-device-audio-looprec-project/bin/.empty_dir
diff --git a/usb-device-audio-looprec-project/main.c b/usb-device-audio-looprec-project/main.c
new file mode 100644
index 0000000..6723c97
--- /dev/null
+++ b/usb-device-audio-looprec-project/main.c
@@ -0,0 +1,449 @@
+/* ----------------------------------------------------------------------------
+ * ATMEL Microcontroller Software Support
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2009, 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.
+ * ----------------------------------------------------------------------------
+ */
+/** \cond usb_audio_looprec
+ * \page usb_audio_looprec USB Audio Loopback-Recorder Example
+ *
+ * \section Purpose
+ *
+ * The USB Audio Loopback-Recorder Example will help you to get
+ * familiar with the USB Device Port(UDP) and DACC 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 Audio Device
+ * class.
+ *
+ * \section Requirements
+ *
+ * This package can be used with SAM9XX5 evaluation kits that have both
+ * UDP.
+ *
+ * \section Description
+ *
+ * The demo simulates an USB Desktop Speaker with Microphone which actually
+ * does not "speak out" but loop back the sound as microphone input.
+ *
+ * When an EK running this program connected to a host (PC for example), with
+ * USB cable, the EK appears as a desktop speaker for the host. Then the host
+ * can play sound through host software. The audio stream from the host is
+ * then sent to the EK. At the same time, the audio stream received is also
+ * sent back to host from EK for recording.
+ *
+ * \section 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/doc6421.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 Audio LoopREC Example 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 find new
+ * "USB Composite Device" and "USB Audio Device" appear in the hardware
+ * device list.
+ * -# You can play sound in host side through the USB Audio Device.
+ * When playing sound, you can also record through the USB Audio Device on
+ * the host.
+ *
+ * \section References
+ * - usb_audio_looprec/main.c
+ * - ssc: SSC interface driver
+ * - usb: USB Framework, Audio Device Class driver and UDP interface driver
+ * - \ref usbd_framework
+ * - \ref usbd_api
+ * - \ref usbd_audio_rec_drv
+ *
+ */
+
+/**
+ * \file
+ *
+ * This file contains all the specific code for the
+ * usb_audio_looprec example.
+ */
+
+/*----------------------------------------------------------------------------
+ * Headers
+ *----------------------------------------------------------------------------*/
+
+#include <board.h>
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdbool.h>
+
+#include <irq/irq.h>
+#include <pio/pio.h>
+#include <pio/pio_it.h>
+#include <utility/trace.h>
+#include <utility/led.h>
+
+#include <usb/device/core/USBD.h>
+#include <usb/device/audio-looprec/AUDDLoopRecDriver.h>
+#include <usb/device/audio-looprec/AUDDLoopRecChannel.h>
+/*----------------------------------------------------------------------------
+ * Definitions
+ *----------------------------------------------------------------------------*/
+
+/** Number of available audio buffers. */
+#define BUFFER_NUMBER 8
+/** Size of one buffer in bytes. */
+#define BUFFER_SIZE (AUDDLoopRecDriver_BYTESPERFRAME*2)
+
+/// 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;
+
+/** Data buffers for receiving audio frames from the USB host. */
+static uint8_t buffers[BUFFER_NUMBER][BUFFER_SIZE];
+/** Number of samples stored in each data buffer. */
+static uint32_t bufferSizes[BUFFER_NUMBER];
+/** Next buffer in which USB data can be stored. */
+static uint32_t inBufferIndex = 0;
+/** Number of buffers that can be sent to the DAC. */
+static volatile uint32_t numBuffersToSend = 0;
+
+/** Current state of the playback stream interface. */
+static volatile uint8_t isPlyActive = 0;
+/** Current state of the record stream interface. */
+static volatile uint8_t isRecActive = 0;
+
+/*----------------------------------------------------------------------------
+ * VBus monitoring (optional)
+ *----------------------------------------------------------------------------*/
+
+/** 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 )
+{
+ /* 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 */
+ USBD_Connect();
+ }
+ else
+ {
+ TRACE_INFO("discon\n\r");
+ USBD_Disconnect();
+ }
+}
+
+/*----------------------------------------------------------------------------
+ * USB Power Control
+ *----------------------------------------------------------------------------*/
+
+#ifdef PIN_USB_POWER_ENA
+/** Power Enable A (MicroAB Socket) pin instance. */
+static const Pin pinPOnA = PIN_USB_POWER_ENA;
+#endif
+#ifdef PIN_USB_POWER_ENB
+/** Power Enable B (A Socket) pin instance. */
+static const Pin pinPOnB = PIN_USB_POWER_ENB;
+#endif
+#ifdef PIN_USB_POWER_ENC
+/** Power Enable C (A Socket) pin instance. */
+static const Pin pinPOnC = PIN_USB_POWER_ENC;
+#endif
+/**
+ * Configures the Power Enable pin to disable self power.
+ */
+static void USBPower_Configure( void )
+{
+ #ifdef PIN_USB_POWER_ENA
+ PIO_Configure(&pinPOnA, 1);
+ #endif
+ #ifdef PIN_USB_POWER_ENB
+ PIO_Configure(&pinPOnB, 1);
+ #endif
+ #ifdef PIN_USB_POWER_ENC
+ PIO_Configure(&pinPOnC, 1);
+ #endif
+}
+
+/*----------------------------------------------------------------------------
+ * Internal functions
+ *----------------------------------------------------------------------------*/
+
+/**
+ * Invoked when a frame has been received.
+ */
+static void FrameReceived(uint32_t unused,
+ uint8_t status,
+ uint32_t transferred,
+ uint32_t remaining)
+{
+ if (status == USBD_STATUS_SUCCESS)
+ {
+ /* Loopback! add this buffer to write list */
+ if (!isRecActive) {}
+ else
+ {
+ AUDDLoopRecDriver_Write(buffers[inBufferIndex],
+ AUDDLoopRecDriver_BYTESPERFRAME,
+ NULL, 0);
+ }
+
+ /* Update input status data */
+ bufferSizes[inBufferIndex] = transferred
+ / AUDDLoopRecDriver_BYTESPERSAMPLE;
+ inBufferIndex = (inBufferIndex + 1) % BUFFER_NUMBER;
+ numBuffersToSend++;
+
+ }
+ else if (status == USBD_STATUS_ABORTED)
+ {
+ /* Error , ABORT, add NULL buffer */
+ bufferSizes[inBufferIndex] = 0;
+ inBufferIndex = (inBufferIndex + 1) % BUFFER_NUMBER;
+ numBuffersToSend++;
+ }
+ else
+ {
+ /* Packet is discarded */
+ }
+
+ /* Receive next packet */
+ AUDDLoopRecDriver_Read(buffers[inBufferIndex],
+ AUDDLoopRecDriver_BYTESPERFRAME,
+ (TransferCallback) FrameReceived,
+ 0); // No optional argument
+}
+
+/*----------------------------------------------------------------------------
+ * 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;
+}
+
+
+
+/**
+ * Invoked when an audio channel get muted or unmuted. Mutes/unmutes the
+ * channel at the DAC level.
+ * \param mic Microphone/Speaker stream changed.
+ * \param channel Channel number that changed.
+ * \param muted Indicates the new mute status of the channel.
+ */
+void AUDDLoopRecChannel_MuteChanged(AUDDLoopRecChannel *channel,
+ uint8_t muted)
+{
+ /* Speaker Master channel */
+ if (channel == AUDDLoopRecDriver_MASTERCHANNEL)
+ {
+ if (muted)
+ {
+ TRACE_WARNING("MuteMaster ");
+ }
+ else
+ {
+ TRACE_INFO("UnmuteMaster ");
+ }
+ }
+}
+
+#if 0
+/**
+ * Invoked when an audio streaming interface setting changed.
+ * Audio stream is automatically reseted.
+ * Actually control streaming rate.
+ * \param mic Microphone/Speaker stream changed.
+ * \param newSetting New stream (interface) setting.
+ */
+void AUDDLoopRecDriver_StreamSettingChanged(uint8_t mic,
+ uint8_t newSetting)
+{
+ /* Speaker stream */
+ if (!mic)
+ {
+ isPlyActive = (newSetting > 0);
+ }
+ else
+ {
+ isRecActive = (newSetting > 0);
+ }
+}
+#endif
+
+/*----------------------------------------------------------------------------
+ * Exported functions
+ *----------------------------------------------------------------------------*/
+
+extern void USBD_IrqHandler(void);
+/**
+ * \brief usb_audio_looprec Application entry point.
+ *
+ * Starts the driver and waits for an audio input stream to forward to the DAC.
+ */
+int main(void)
+{
+ volatile uint8_t usbConn = 0;
+ volatile uint8_t plyOn = 0, recOn = 0;
+
+ printf("-- USB Device Audio LoopREC Example %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);
+
+ /* Initialize all USB power (off) */
+ USBPower_Configure();
+
+ /* Audio STREAM LED */
+ LED_Configure(USBD_LEDOTHER);
+
+ /* Configure USB & DACC interrupt priority */
+ //IRQ_ConfigureIT( ID_UDPHS, 6, USBD_IrqHandler );
+
+ /* USB audio driver initialization */
+ AUDDLoopRecDriver_Initialize();
+
+ /* connect if needed */
+ VBus_Configure();
+
+ /* Infinite loop */
+ while (1)
+ {
+ if (USBD_GetState() < USBD_STATE_CONFIGURED)
+ {
+ usbConn = 0;
+ continue;
+ }
+ if (plyOn)
+ {
+ if (isPlyActive == 0)
+ {
+ printf("plyE ");
+ plyOn = 0;
+ }
+ }
+ else if (isPlyActive)
+ {
+ /* Try to Start Reading the incoming audio stream */
+ AUDDLoopRecDriver_Read(buffers[inBufferIndex],
+ AUDDLoopRecDriver_BYTESPERFRAME,
+ (TransferCallback) FrameReceived,
+ 0); // No optional argument
+
+ printf("plyS ");
+ plyOn = 1;
+ }
+ if (recOn)
+ {
+ if (isRecActive == 0)
+ {
+ printf("recE ");
+ recOn = 0;
+ }
+ }
+ else if (isRecActive)
+ {
+ printf("recS ");
+ recOn = 1;
+ }
+ }
+}
+/** \endcond */
diff --git a/usb-device-audio-looprec-project/obj/.empty_dir b/usb-device-audio-looprec-project/obj/.empty_dir
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/usb-device-audio-looprec-project/obj/.empty_dir
personal git repositories of Harald Welte. Your mileage may vary