From c862d700c6c694e345df2f33a4af61ebac807692 Mon Sep 17 00:00:00 2001 From: Harald Welte Date: Thu, 1 Dec 2011 20:54:00 +0100 Subject: [PATCH] add audio looprec project ported for sam3u-ek --- usb-device-audio-looprec-project/Makefile | 239 ++++++++++ .../bin/.empty_dir | 0 usb-device-audio-looprec-project/main.c | 449 ++++++++++++++++++ .../obj/.empty_dir | 0 4 files changed, 688 insertions(+) create mode 100644 usb-device-audio-looprec-project/Makefile create mode 100644 usb-device-audio-looprec-project/bin/.empty_dir create mode 100644 usb-device-audio-looprec-project/main.c create mode 100644 usb-device-audio-looprec-project/obj/.empty_dir 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 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 + * + * SAM-BA User Guide, the + * + * GNU-Based Software Development application note or to the + * + * IAR EWARM User Guide, 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 + +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#include +#include +#include +/*---------------------------------------------------------------------------- + * 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