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sam3u-tests/usb-fast-audio-source/main.c

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/* ----------------------------------------------------------------------------
* 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.
* ----------------------------------------------------------------------------
*/
/**
* \file
*
* This file contains all the specific code for the
* usb_fast_source 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 <fast_source.h>
/*----------------------------------------------------------------------------
* Definitions
*----------------------------------------------------------------------------*/
#if 0
/** Number of available audio buffers. */
#define BUFFER_NUMBER 8
/** Size of one buffer in bytes. */
#define BUFFER_SIZE (AUDDLoopRecDriver_BYTESPERFRAME*2)
#endif
/// 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;
#if 0
/** 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;
#endif
/** 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
*----------------------------------------------------------------------------*/
#if 0
/**
* 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
}
#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;
}
/*----------------------------------------------------------------------------
* 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;
TRACE_CONFIGURE(DBGU_STANDARD, 115200, BOARD_MCK);
printf("-- USB Device Fast Audio Source %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);
/* USB audio driver initialization */
fastsource_init();
/* connect if needed */
VBus_Configure();
static int state = 0;
/* Infinite loop */
while (1)
{
if (USBD_GetState() < USBD_STATE_CONFIGURED)
{
usbConn = 0;
continue;
}
if (state == 0) {
fastsource_start();
state = 1;
}
if (plyOn)
{
if (isPlyActive == 0)
{
printf("plyE ");
plyOn = 0;
}
}
else if (isPlyActive)
{
#if 0
/* Try to Start Reading the incoming audio stream */
AUDDLoopRecDriver_Read(buffers[inBufferIndex],
AUDDLoopRecDriver_BYTESPERFRAME,
(TransferCallback) FrameReceived,
0); // No optional argument
printf("plyS ");
plyOn = 1;
#endif
}
if (recOn)
{
if (isRecActive == 0)
{
printf("recE ");
recOn = 0;
}
}
else if (isRecActive)
{
printf("recS ");
recOn = 1;
}
}
}
/** \endcond */
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