From eebb6cc1217260d7b29478a83008ee070d57738e Mon Sep 17 00:00:00 2001 From: Harald Welte Date: Thu, 1 Dec 2011 19:53:03 +0100 Subject: initial checkin of usb-device-audio-speaker-project for sam3u-ek --- usb-device-audio-speaker-project/Makefile | 241 +++++++ usb-device-audio-speaker-project/bin/.empty_dir | 0 usb-device-audio-speaker-project/main.c | 835 ++++++++++++++++++++++++ usb-device-audio-speaker-project/obj/.empty_dir | 0 4 files changed, 1076 insertions(+) create mode 100644 usb-device-audio-speaker-project/Makefile create mode 100644 usb-device-audio-speaker-project/bin/.empty_dir create mode 100644 usb-device-audio-speaker-project/main.c create mode 100644 usb-device-audio-speaker-project/obj/.empty_dir (limited to 'usb-device-audio-speaker-project') diff --git a/usb-device-audio-speaker-project/Makefile b/usb-device-audio-speaker-project/Makefile new file mode 100644 index 0000000..2baa56e --- /dev/null +++ b/usb-device-audio-speaker-project/Makefile @@ -0,0 +1,241 @@ +# ---------------------------------------------------------------------------- +# 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 += $(COMP)/codec-wm8731 +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-speaker +VPATH += $(USB)/device/core +VPATH += $(USB)/common/core +VPATH += $(USB)/common/audio + +# Objects built from C source files +C_OBJECTS += main.o +C_OBJECTS += wm8731.o +C_OBJECTS += USBD_UDPHS.o +C_OBJECTS += USBDDriver.o +C_OBJECTS += USBDCallbacks_Initialized.o +C_OBJECTS += USBDCallbacks_Reset.o +#C_OBJECTS += USBDCallbacks_Resumed.o +#C_OBJECTS += USBDCallbacks_Suspended.o +C_OBJECTS += USBDDriverCb_CfgChanged.o +#C_OBJECTS += USBDDriverCb_IfSettingChanged.o +C_OBJECTS += USBInterfaceRequest.o +C_OBJECTS += USBFeatureRequest.o +C_OBJECTS += USBGenericRequest.o +C_OBJECTS += USBGetDescriptorRequest.o +C_OBJECTS += USBSetAddressRequest.o +C_OBJECTS += USBSetConfigurationRequest.o +C_OBJECTS += USBGenericDescriptor.o +C_OBJECTS += USBConfigurationDescriptor.o +C_OBJECTS += USBEndpointDescriptor.o +C_OBJECTS += dbgu.o +C_OBJECTS += pio.o +C_OBJECTS += pio_it.o +C_OBJECTS += ssc.o +C_OBJECTS += twi.o +C_OBJECTS += pmc.o +C_OBJECTS += led.o +C_OBJECTS += twid.o +C_OBJECTS += string.o +C_OBJECTS += stdio.o +C_OBJECTS += math.o +C_OBJECTS += trace.o +C_OBJECTS += board_memories.o +C_OBJECTS += board_lowlevel.o + +C_OBJECTS += AUDDSpeakerDriverDescriptors.o AUDDSpeakerDriver.o +C_OBJECTS += AUDDSpeakerChannel.o +C_OBJECTS += AUDGenericRequest.o AUDFeatureUnitRequest.o + + +# Objects for different chips +ifeq ($(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-speaker-project/bin/.empty_dir b/usb-device-audio-speaker-project/bin/.empty_dir new file mode 100644 index 0000000..e69de29 diff --git a/usb-device-audio-speaker-project/main.c b/usb-device-audio-speaker-project/main.c new file mode 100644 index 0000000..46e651a --- /dev/null +++ b/usb-device-audio-speaker-project/main.c @@ -0,0 +1,835 @@ +/* ---------------------------------------------------------------------------- + * ATMEL Microcontroller Software Support + * ---------------------------------------------------------------------------- + * Copyright (c) 2008, Atmel Corporation + * Copyright (c) 2011, Harald Welte + * + * 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 audio speaker" +/// +/// !!!Purpose +/// +/// The USB Audio Speaker Project will help you to get familiar with the +/// USB Device Port(UDP) and SSC 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 Audio Device +/// class. +/// +/// You can find following information depends on your needs: +/// - Sample usage of USB Audio Device Class driver and SSC-I2S driver. +/// - USB Audio Class 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 SSC interface with PDC. +/// +/// !See +/// - ssc: SSC interface driver +/// - "i2s-wm8731: I2S codec wm8731 driver +/// - usb: USB Framework, Audio Device Class driver and UDP interface driver +/// - "AT91 USB device framework" +/// - "USBD API" +/// - "audio-speaker" +/// +/// !!!Requirements +/// +/// This package can be used with all Atmel evaluation kits that have both +/// UDP and SSC interface. +/// +/// The current supported board list: +/// - at91sam3u-ek +/// +/// !!!Description +/// +/// 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, and eventually sent to %audio DAC connected to AC97 +/// of AT91SAM chips. At the same time, the %audio stream received is also sent +/// back to host from EK for recording. +/// +/// !!!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 Speaker 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 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, and it +/// can be heard from the earphone connected to the EK. +/// -# When playing sound, you can also record through the USB Audio Device on +/// the host. +/// +//----------------------------------------------------------------------------- + +//----------------------------------------------------------------------------- +/// \unit +/// +/// !Purpose +/// +/// This file contains all the specific code for the +/// usb-device-audio-speaker-project +/// +/// !Contents +/// +/// The code can be roughly broken down as follows: +/// - Configuration functions +/// - VBus_Configure +/// - PIO & Clock configurations in start of main +/// - Interrupt handlers +/// - ISR_SSC +/// - Callback functions +/// - AUDDSpeakerChannel_MuteChanged +/// - FrameReceived +/// - 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#define AUDIO_USING_DMA +#if defined(AUDIO_USING_DMA) +#include +#include +#endif + +//------------------------------------------------------------------------------ +// Definitions +//------------------------------------------------------------------------------ + +/// Master clock frequency in Hz +#define SSC_MCK 49152000 + +// TWI clock +#define TWI_CLOCK 100000 + +/// Number of available audio buffers. +#define BUFFER_NUMBER 5 +/// Size of one buffer in bytes. +#define BUFFER_SIZE (AUDDSpeakerDriver_BYTESPERFRAME + \ + AUDDSpeakerDriver_BYTESPERSUBFRAME) + +/// Delay in ms for starting the DAC transmission after a frame has been received. +#define DAC_DELAY 2 + +#define SAMPLE_RATE (48000) +#define SLOT_BY_FRAME (2) +#define BITS_BY_SLOT (16) + +#define AT91C_I2S_MASTER_TX_SETTING(nb_bit_by_slot, nb_slot_by_frame)( +\ + AT91C_SSC_CKS_DIV +\ + AT91C_SSC_CKO_CONTINOUS +\ + AT91C_SSC_START_FALL_RF +\ + ((1<<16) & AT91C_SSC_STTDLY) +\ + ((((nb_bit_by_slot*nb_slot_by_frame)/2)-1) <<24)) + +#define AT91C_I2S_TX_FRAME_SETTING(nb_bit_by_slot, nb_slot_by_frame)( +\ + (nb_bit_by_slot-1) +\ + AT91C_SSC_MSBF +\ + (((nb_slot_by_frame-1)<<8) & AT91C_SSC_DATNB) +\ + (((nb_bit_by_slot-1)<<16) & AT91C_SSC_FSLEN) +\ + AT91C_SSC_FSOS_NEGATIVE) + +// PMC define +#define AT91C_CKGR_PLLR AT91C_CKGR_PLLAR +#define AT91C_PMC_LOCK AT91C_PMC_LOCKA + +#define AT91C_CKGR_MUL_SHIFT 16 +#define AT91C_CKGR_OUT_SHIFT 14 +#define AT91C_CKGR_PLLCOUNT_SHIFT 8 +#define AT91C_CKGR_DIV_SHIFT 0 + +/// 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 unsigned char buffers[BUFFER_NUMBER][BUFFER_SIZE]; +/// Number of bytes stored in each data buffer. +static volatile unsigned int bufferSizes[BUFFER_NUMBER]; +/// Next buffer in which USB data can be stored. +static volatile unsigned int inBufferIndex = 0; +/// Next buffer which should be sent to the DAC. +static volatile unsigned int outBufferIndex = 0; +/// Number of buffers that can be sent to the DAC. +static volatile unsigned int numBuffersToSend = 0; + +/// Current state of the DAC transmission. +static volatile unsigned int isDacActive = 0; +/// Number of buffers to wait for before the DAC starts to transmit data. +static volatile unsigned int dacDelay; + +/// List of pins to configure for the application. +static const Pin pins[] = {PINS_TWI0, PINS_SSC_CODEC, PIN_PCK0}; + +static Twid twid; + +//------------------------------------------------------------------------------ +// 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 { + TRACE_INFO("VBUS discon\n\r"); + 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 ) ); +} +#else +//------------------------------------------------------------------------------ +/// Put the CPU in low power mode (for customer) +//------------------------------------------------------------------------------ +static void LowPowerMode(void) +{ +} + +//------------------------------------------------------------------------------ +/// Return the CPU to normal speed (for customer) +//------------------------------------------------------------------------------ +static void NormalPowerMode(void) +{ +} +#endif + + +//------------------------------------------------------------------------------ +// 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 channel Pointer to an AUDDSpeakerChannel instance. +/// \param muted Indicates the new mute status of the channel. +//------------------------------------------------------------------------------ +void AUDDSpeakerChannel_MuteChanged( + AUDDSpeakerChannel *channel, + unsigned char muted) +{ + // Master channel + if (AUDDSpeakerChannel_GetNumber(channel) == AUDDSpeakerDriver_MASTERCHANNEL) { + + if (muted) { + + TRACE_INFO("MuteMaster "); + //AT73C213_SetMuteStatus(1, 1); + } + else { + + TRACE_INFO("UnmuteMaster "); + //AT73C213_SetMuteStatus(0, 0); + } + } +} + +//------------------------------------------------------------------------------ +// Internal functions +//------------------------------------------------------------------------------ + +#if 0 +//------------------------------------------------------------------------------ +/// Handles interrupts coming from the SSC. Sends remaining audio buffers +/// or stops the DAC transmission. +//------------------------------------------------------------------------------ +static void ISR_SSC(void) +{ + if ((AT91C_BASE_SSC0->SSC_SR & AT91C_SSC_TXBUFE) != 0) { + + // End of transmission + TRACE_DEBUG("End "); + SSC_DisableInterrupts(AT91C_BASE_SSC0, + AT91C_SSC_TXBUFE + | AT91C_SSC_ENDTX); + AT91C_BASE_SSC0->SSC_PTCR = AT91C_PDC_TXTDIS; + isDacActive = 0; + } + else if (numBuffersToSend > 0) { + + // Check the number of available buffers + if (numBuffersToSend > DAC_DELAY) { + + // Strip one sample on all channels + bufferSizes[outBufferIndex] -= AUDDSpeakerDriver_NUMCHANNELS; + } + else if (numBuffersToSend < DAC_DELAY) { + + // Copy the last sample on all channels + memcpy(&buffers[outBufferIndex][bufferSizes[outBufferIndex]], + &buffers[outBufferIndex][bufferSizes[outBufferIndex] - AUDDSpeakerDriver_BYTESPERSUBFRAME], + AUDDSpeakerDriver_BYTESPERSUBFRAME); + bufferSizes[outBufferIndex] += AUDDSpeakerDriver_NUMCHANNELS; + } + + // Load next buffer + SSC_WriteBuffer(AT91C_BASE_SSC0 + buffers[outBufferIndex], + bufferSizes[outBufferIndex]); + outBufferIndex = (outBufferIndex + 1) % BUFFER_NUMBER; + numBuffersToSend--; + } + else { + + SSC_DisableInterrupts(AT91C_BASE_SSC0, + AT91C_SSC_ENDTX); + } +} +#endif + +#if defined(AUDIO_USING_DMA) +void HDMA_IrqHandler(void) +{ + unsigned intFlag = 1 << (BOARD_SSC_DMA_CHANNEL + 8); + if (numBuffersToSend > 0) { + SSC_WriteBuffer(AT91C_BASE_SSC0, buffers[outBufferIndex], bufferSizes[outBufferIndex]); + outBufferIndex = (outBufferIndex + 1) % BUFFER_NUMBER; + + DMA_EnableIt(intFlag); + DMA_EnableChannel(BOARD_SSC_DMA_CHANNEL); + numBuffersToSend--; + } else { + DMA_DisableIt(intFlag); + DMA_DisableChannel(BOARD_SSC_DMA_CHANNEL); + SSC_DisableTransmitter(AT91C_BASE_SSC0); + } +} +#endif + +//------------------------------------------------------------------------------ +/// Invoked when a frame has been received. +//------------------------------------------------------------------------------ +static void FrameReceived(unsigned int unused, + char status, + unsigned int transferred, + unsigned int remaining) +{ + bufferSizes[inBufferIndex] = transferred / AUDDSpeakerDriver_BYTESPERSAMPLE; + inBufferIndex = (inBufferIndex + 1) % BUFFER_NUMBER; + numBuffersToSend++; + + TRACE_DEBUG("FrameReceived "); + + // Start DAc transmission if necessary + if (!isDacActive) { + + TRACE_DEBUG("Start "); + dacDelay = DAC_DELAY; + isDacActive = 1; + } + // Wait until a few buffers have been received + else if (dacDelay > 0) { + + dacDelay--; + } + // Start sending buffers + else { +#if defined(AUDIO_USING_DMA) + SSC_EnableTransmitter(AT91C_BASE_SSC0); + + unsigned intFlag = 1 << (BOARD_SSC_DMA_CHANNEL + 8); + DMA_DisableIt(intFlag); + DMA_DisableChannel(BOARD_SSC_DMA_CHANNEL); + + SSC_WriteBuffer(AT91C_BASE_SSC0, + buffers[outBufferIndex], + bufferSizes[outBufferIndex]); + outBufferIndex = (outBufferIndex + 1) % BUFFER_NUMBER; + numBuffersToSend--; +#if 0 + SSC_WriteBuffer(AT91C_BASE_SSC0, + buffers[outBufferIndex], + bufferSizes[outBufferIndex]); + outBufferIndex = (outBufferIndex + 1) % BUFFER_NUMBER; + numBuffersToSend--; +#endif + + DMA_EnableIt(intFlag); + DMA_EnableChannel(BOARD_SSC_DMA_CHANNEL); +#else +#error DMA required for audio!! +#endif + } + + // Receive next packet + AUDDSpeakerDriver_Read(buffers[inBufferIndex], + AUDDSpeakerDriver_BYTESPERFRAME, + (TransferCallback) FrameReceived, + 0); // No optional argument +} + +//------------------------------------------------------------------------------ +// Exported functions +//------------------------------------------------------------------------------ + +//------------------------------------------------------------------------------ +/// Starts the driver and waits for an audio input stream to forward to the SSC. +//------------------------------------------------------------------------------ +int main(void) +{ + TRACE_CONFIGURE(DBGU_STANDARD, 115200, BOARD_MCK); + printf("-- USB Device Audio Speaker Project %s --\n\r", SOFTPACK_VERSION); + printf("-- %s\n\r", BOARD_NAME); + printf("-- Compiled: %s %s --\n\r", __DATE__, __TIME__); + + // Initialize all PIOs + PIO_Configure(pins, PIO_LISTSIZE(pins)); + + // Initialize PSRAM + BOARD_ConfigurePsram(); + + // Switch to Main clock + AT91C_BASE_PMC->PMC_MCKR = (AT91C_BASE_PMC->PMC_MCKR & ~AT91C_PMC_CSS) | AT91C_PMC_CSS_MAIN_CLK; + while ((AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY) == 0); + + // Configure PLL to 98.285MHz + *AT91C_CKGR_PLLR = ((1 << 29) | (171 << AT91C_CKGR_MUL_SHIFT) \ + | (0x0 << AT91C_CKGR_OUT_SHIFT) |(0x3f << AT91C_CKGR_PLLCOUNT_SHIFT) \ + | (21 << AT91C_CKGR_DIV_SHIFT)); + while ((AT91C_BASE_PMC->PMC_SR & AT91C_PMC_LOCK) == 0); + + // Configure master clock in two operations + AT91C_BASE_PMC->PMC_MCKR = (( AT91C_PMC_PRES_CLK_2 | AT91C_PMC_CSS_PLLA_CLK) & ~AT91C_PMC_CSS) | AT91C_PMC_CSS_MAIN_CLK; + while ((AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY) == 0); + AT91C_BASE_PMC->PMC_MCKR = ( AT91C_PMC_PRES_CLK_2 | AT91C_PMC_CSS_PLLA_CLK); + while ((AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY) == 0); + + // DBGU reconfiguration + DBGU_Configure(DBGU_STANDARD, 115200, SSC_MCK); + + // Configure and enable the TWI (required for accessing the DAC) + *AT91C_PMC_PCER = (1<< AT91C_ID_TWI0); + TWI_ConfigureMaster(AT91C_BASE_TWI0, TWI_CLOCK, SSC_MCK); + TWID_Initialize(&twid, AT91C_BASE_TWI0); + + // Enable the DAC master clock + AT91C_BASE_PMC->PMC_PCKR[0] = AT91C_PMC_CSS_PLLA_CLK | AT91C_PMC_PRES_CLK_8; + AT91C_BASE_PMC->PMC_SCER = AT91C_PMC_PCK0; + while ((AT91C_BASE_PMC->PMC_SR & AT91C_PMC_PCKRDY0) == 0); + + // Initialize the audio DAC + WM8731_DAC_Init(&twid, WM8731_SLAVE_ADDRESS); + + // Configure SSC + SSC_Configure(AT91C_BASE_SSC0, + AT91C_ID_SSC0, + SAMPLE_RATE * BITS_BY_SLOT * 2, + SSC_MCK); + SSC_ConfigureReceiver(AT91C_BASE_SSC0, 0, 0); + SSC_ConfigureTransmitter(AT91C_BASE_SSC0, + AT91C_I2S_MASTER_TX_SETTING(BITS_BY_SLOT, SLOT_BY_FRAME), + AT91C_I2S_TX_FRAME_SETTING( BITS_BY_SLOT, SLOT_BY_FRAME)); + SSC_DisableTransmitter(AT91C_BASE_SSC0); + +#if defined(AUDIO_USING_DMA) + // Initialize DMA controller. + DMAD_Initialize(BOARD_SSC_DMA_CHANNEL, 0); + // Configure and enable the SSC interrupt + IRQ_ConfigureIT(AT91C_ID_HDMA, 0, HDMA_IrqHandler); + IRQ_EnableIT(AT91C_ID_HDMA); +#endif + + // USB audio driver initialization + AUDDSpeakerDriver_Initialize(); + + // connect if needed + VBUS_CONFIGURE(); + while (USBD_GetState() < USBD_STATE_CONFIGURED); + + // Infinite loop + while (1) { + + 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; + } + // Read the incoming audio stream + AUDDSpeakerDriver_Read(buffers[inBufferIndex], + AUDDSpeakerDriver_BYTESPERFRAME, + (TransferCallback) FrameReceived, + 0); // No optional argument + } + + return 0; +} + diff --git a/usb-device-audio-speaker-project/obj/.empty_dir b/usb-device-audio-speaker-project/obj/.empty_dir new file mode 100644 index 0000000..e69de29 -- cgit v1.2.3