Jan 30, 2018 - Digilent Usb Jtag Driver Download. Also, I've noticed that the proper drivers can be installed automatically for Windows XP machines, but not. Sensicomm LLC - DSP design services. Algorithms, software and hardware for sensors, signal processing, and communications. Using the Digilent Nexys USB interface in Linux March 2011 update: There have been several changes since this page was originally written. Digilent now provides command-line utilities for Linux that can access and program their boards. They also provide a plugin for the Xilinx iMPACT programming tool. So this page is out of date, but I'm leaving it up for now because the information may still be useful to some. I have 3 Xilinx FPGA boards made. Two of these boards are the Nexys and Nexys II. The third is a Xilinx Spartan-3AN eval board, which is also made by Digilent but sold directly by Xilinx. The two Nexys boards have Cypress CY7C68013A USB interfaces that implement the JTAG interface to the board, and also support data transfer between the FPGA and a host PC. Board schematics are available from Digilent and show the connections between the USB chip and the FPGA. Digilent supplies software for programming the FPGA via the USB port, and they also supply drivers for data transfer. I would like to use the USB port to access and control my designs that I put in the FPGA, but from a Linux host. I now have data transfers between host and FPGA working for both Nexys boards. The Spartan-3AN board uses an undocumented USB interface that's clearly different, so this software won't work there. I found a couple of other people have started to work on this sort of thing:. I used Braiden's work as a starting point. Fsx gold edition full version free. Background The USB chip contains an 80C51 microcontroller core that controls setup, and it has hardware FIFO's that support high-speed data transfers directly from the USB bus to an external device (the FPGA in this case). The chip normally loads its initial firmware from an onboard Flash ROM, but it can also accept firmware downloads over USB. I'm not interested in reverse-engineering the Digilent firmware, so I decided to create my own firmware to support data transfers. Items needed include fxload Program to download new code to the Cypress usb chip. Available from the project on Sourceforge. SDCC Small Device C Compiler - Needed to compile the C51 code. Fx2regs.h device-specific C header file for SDCC. Several are floating around on the web. I used the one from. Libusb Userspace USB library. Allows access to USB devices from a program, without a device-specific driver. Debian includes all components except fx2lib as part of the distribution. You need Debian's nonfree version of SDCC; the regular version doesn't support the C51. Components C51 Firmware Program usb_main.c is the firmware for the Cypress USB chip. It just resets the chip to bring up the default configuration, and then configures the FIFO's. After that, the internal logic of the chip handles the transfers. Host transfer controller Program usb_rw.c is a simple demo program. It sets up the USB interface, then it copies bytes from the terminal to the USB output endpoint (EP2) and reads bytes from the USB input endpoint (EP6). FPGA firmware The test firmware reads bytes from FIFO 0 (USB Endpoint 2) and writes bytes to FIFO 2 (USB Endpoint 6). It displays information on the row of 8 LED's, and uses the slide switches and pushbuttons for control. When slide switch SW2 is high and all others low, the LED's display the last character received on EP2. ![]() So, for example, if you type an 'a' followed by carriage return into usb_rw, you should see the bit pattern of an ASCII 'a' on the LED's. Other slide switch settings display byte counts for EP2 and EP6. See the VHDL code for details. While pushbutton BTN0 is pressed, the FPGA begins sending dummy data to EP6. The data is just a continuously incrementing value. So, when usb_rw is running, you should see it begin spewing out 'read 1024 bytes' messages when you press BTN0. Tiff viewer for mac. The firmware is written in VHDL and can be compiled using the Xilinx WebPack software (available for free download from ). Use FPGA First step is to get the VHDL code into the FPGA. I include a sample nexys_usb.mcs file that can be used with the Nexys 2 with the 500k FPGA. I use the Digilent Adept software running under windows. For Linux, I have an old, otherwise unused, copy of Windows 2000 installed in a VMWARE virtual machine.
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