Usb; Usb Overview; Usb 2.0 Device Controller (Ftdi); Usb Connections Overview - Enclustra Mars EB1 Base Board User Manual

6.5

USB

6.5.1

USB Overview

Figure 9 presents an overview of the USB connections on the Mars EB1 base board. The default configuration
is marked in bold.
Figure 9: USB Connections Overview
The FTDI device can be connected either to the USB 2.0 micro B connector on the front panel, or to the USB
2.0 micro B connector on the side. The FTDI connection can be used for configuration or test purposes.
Warning!
The switch configuration CFG B 1 OFF (activate connection from module USB to USB 2.0 micro B front
panel connector) and CFG B 2 ON (activate connection from FTDI to USB 2.0 micro B front panel
connector) is not permitted, and may damage the Mars EB1 base board and equipped Mars module.
6.5.2

USB 2.0 Device Controller (FTDI)

The FTDI FT2232HQ USB 2.0 device controller present on the Mars EB1 base board can be used to easily
implement a communication link to a host PC.
The FTDI device is connected to the system controller and can be used for various communication protocols.
Details on the FTDI modes and configuration can be found in Section 6.10.
By default, the UART communication between the FTDI device and FPGA is active. The Xilinx JTAG mode
can be activated using the Enclustra MCT [11] and is independent of the UART connection.
The library used by the MCT is available free of charge; it allows users to integrate module enumeration,
FPGA and SPI flash configuration, and I2C communication functionality in their own application. The library
consists of a Windows DLL with a C-style interface, allowing use of the library from almost any programming
language; for C++ applications, a C++ wrapper is also provided. Please contact Enclustra for details.
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