main
Default mainpageusb-device-composite-hidaudio-projectmain
Description Source Call Graph
Start Line: 947
int main()
{
    TRACE_CONFIGURE(DBGU_STANDARD, 115200, BOARD_MCK);
    printf("-- USB Composite Device Project %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);

    // ----- HID Function Initialize
    // Initialize key statuses and configure push buttons
    PIO_Configure(pinsPushButtons, PIO_LISTSIZE(pinsPushButtons));
    memset(keyStatus, 1, NUM_KEYS);

    // Configure LEDs
    LED_Configure(LED_NUMLOCK);

    // ----- AUDIO Function Initialize
    // Initialize all PIOs
    PIO_Configure(pinsAud, PIO_LISTSIZE(pinsAud));

    // Configure and enable the SPI (required for accessing the DAC)
    SPI_Configure(BOARD_AT73C213_SPI,
                  BOARD_AT73C213_SPI_ID,
                  SPI_CONFIGURATION);
    SPI_Enable(BOARD_AT73C213_SPI);

#if defined(at91sam9260)
    // Switch to slow clock oscillator
    AT91C_BASE_PMC->PMC_MCKR = (AT91C_BASE_PMC->PMC_MCKR & ~AT91C_PMC_CSS) | AT91C_PMC_CSS_SLOW_CLK;
    while ((AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY) != AT91C_PMC_MCKRDY);

    // Configure PLLA at 147.456MHz
    AT91C_BASE_PMC->PMC_PLLAR = 0x20073F01;
    while (!(AT91C_BASE_PMC->PMC_SR & AT91C_PMC_LOCKA));

    // Switch to slow clock + prescaler
    AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_MDIV_2;
    while (!(AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY));

    // Switch to PLL + prescaler
    AT91C_BASE_PMC->PMC_MCKR |= AT91C_PMC_CSS_PLLA_CLK;
    while (!(AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY));

    // 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_PCK0RDY) == 0);
#else
    NormalPowerMode();
#endif

    TRACE_CONFIGURE(DBGU_STANDARD, 115200, MCK);

    // Initialize the audio DAC
    // Configure and enable the DAC
    AT73C213_Enable(AUDD_SAMPLERATE,
                    AUDD_BYTESPERSAMPLE,
                    AUDD_NUMCHANNELS,
                    1, // MCK = 384 * Fs
                    MCK);

    // Configure and enable the SSC interrupt
    AIC_ConfigureIT(BOARD_AT73C213_SSC_ID,
                    AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL | SSC_PRIORITY,
                    ISR_SSC);
    AIC_EnableIT(BOARD_AT73C213_SSC_ID);

    // USB COMPOSITE driver initialization
    COMPOSITEDDriver_Initialize();

    // connect if needed
    VBUS_CONFIGURE();

    // Driver loop
    while (1) {

        // Device is not configured
        if (USBD_GetState() < USBD_STATE_CONFIGURED) {

            // Connect pull-up, wait for configuration
            USBD_Connect();
            while (USBD_GetState() < USBD_STATE_CONFIGURED);

        }
        else {

            // Read the incoming audio stream
            AUDDSpeakerDriver_Read(usbAudBuffers[inBufferIndex],
                                   AUDD_BYTESPERFRAME,
                                   (TransferCallback) FrameReceived,
                                   0); // No optional argument

            HIDDKeyboardProcessKeys();
        }
        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;
        }
    }
}