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This function pull 64 bytes from EP1IN EP1OUTBUF FIFO; in this FIFO , the FX2_API_Commands (MicroBlaze Commands and SPI Flash Commnads) from USB connection with are stored possible sent by host computer's SW through USB connection.
EP1OUTBUF[0] and EP1OUTBUF[1:63] are written by host computer's software
or or libusb(x) C libusb_bulk_transfer(usbDeviceHandle, LIBUSB_ENDPOINT_OUT | 1, command, x, &actual_length, 1000) used with command[0] =...