SDR (Software Defined Radio) » OsmoSDR

/* ----------------------------------------------------------------------------

 *         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 <usb/device/dfu/dfu.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;

static const Pin pinPB = PIN_PUSHBUTTON_1;

/**

 *  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();

    PIO_Configure(&pinPB, 1);

    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;

        }

#ifdef dfu

	if (PIO_Get(&pinPB) == 0)

		DFURT_SwitchToDFU();

#endif

    }

}

/** \endcond */