I did other tests, and I have additional informations that I hope could help solving the problem:

• I've been running this example on a custom board based on the BF527 EZ-Kit schematics. I have a ADSP-BF527 KBCZ-5C2 rev. 0.2 processor
• I have some USB Flash devices that work as expected (256MB, 512MB, 1GB, FAT16, FAT32) and others that don't work at all (256MB, 512MB, 1GB, FAT16, FAT32)
• When I plug a working device, the VBUS error Interrupt is generated and the following instructions

/* IF (VBUS error Interrupt) */
if ( (ucIrqStatus&USB_INTRUSB_VBUSERROR_B) && pDev->Mode==MODE_OTG_HOST )
{
    /* Acknowledge pending VBUS error interrupt */
    *pUSB_INTRUSB = ucIrqStatus;
    DriveVbusOff(pDev);
    DriveVbusOn(pDev);
    SetSessionBit();
    return ADI_INT_RESULT_PROCESSED;
}

in UsbInterruptHandler() function (adi_usb_hdrc.c source file) are executed

• When I plug a device that doesn't work, the VBUS error Interrupt is never generated, and the ADI_USB_EVENT_RX_COMPLETE doesn't happen

This sounds me as an hardware problem....

Could someone give me some help?

Thanks

The following USB devices don't work

• Transcend JetFlash V30 512 MB
• Transcend JetFlash V30 1 GB

but they work perfectly on a PC (both Win and Linux).

I've been using VisualDSP++ 5.0 Update 6

I found in the silicon anomaly list some anomalies related to USB RX and BF527 rev 0.2. Could this be my problem?