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  1. Lumahajjar

    Nexys4 DDR Camera

    I am currently using a Nexys4 DDR to implement a project for my University The project requires a video camera what’s the best camera that goes with Nexys4 DDR ? In term of resolution and everything else thank you
  2. Hi, I've recently got a Nexys 4 DDR and I'm trying to find a keyboard that works with it. Any mouse I have works, so I'm assuming the USB connector and the PIC24 are all soldered on properly and working. I know that older and/or 'simple' keyboards are supposed to work but so far I haven't found any that actually do. I'm still looking, and I've ask around (on this forum and elsewhere) for specific make/models that are know to work. In the meantime, I've observed that when I connect the keyboard I'm using right now to type this post to the Nexys4 DDR, and run the Nexys-4-DDR-Keybo
  3. I have a question regarding the Nexys 4 DDR and his successor the Nexys A7: Will a working VHDL-Program, written for the Nexys 4 DDR XC7A100T-1CSG324C, work on an Nexys A7 XC7A100T-1CSG324C? (written in VHDL constructed in Vivado, using the constraint-file „Nexys-4-DDR-Master“ from your resource center [https://github.com/Digilent/digilent-xdc/] ) Is it possible to simply generate the Bitstream of this Program (made for the Nexys 4 DDR XC7A100T-1CSG324C) and download it onto the Nexys A7 XC7A100T-1CSG324C without making any changes to the code? Even if the Constraint-File
  4. Hey everyone! I am considering buying a Nexys A7 100T in India (through Digilent for the academic pricing). Can someone here please guide me on the import duties if you have tried that before? From the HSN Code it looks like it is supposed to be 18% but I have heard from friends where they have even paid 50% for some electronics imports. Thanks!
  5. Hello, Is there any way that I can connect the Nexys4DDR to an HDMI connector, for example using a breakout board such as this one https://www.adafruit.com/product/3119 The critical factor would be getting access to 4 differential pair outputs (TMDS) from the Artix-7 FPGA. I note that there is no HDMI PMOD available, which suggests that these pins are actually not available externally on this board. I already have the Nexys4DDR, which is the right board for me. I don't need the dedicated Nexys Video, I'm just trying to upgrade my display output from VGA to HDMI - which could
  6. I use a Nexys 4 DDR board for some time now. I never used to have problems when programming the device. Today I tried to program the device as I did many times before, but it didn't work. It said I should check whether I connected the board properly and so on. So I checked the Jumper settings and everything. Now I tried to see whether the FTDI FT2232HQ chip is recognized. When using the bash command "lsusb" the chip is not listed anymore. Does anyone know what the problem could be? How else could I check whether the FTDI FT2232HQ chip is working or not? I need to finish a report
  7. I followed the directions to a forum that show how to install board files into Vivado. Link: My issue comes when I close Vivado and reopen to create a new project, I don't see an option for selecting a nexys4 ddr board, like if I were looking for a Zybo board. I believe I copied the files over correctly. When selecting a board in Vivado, is it under a different name or would it say "nexy4 ddr"?
  8. Hi, I have started using PMOD BLE recently and I can make a connection in between BLE and PC using a terminal (with Nexys4DDR making a direct connection in between). However, when I write a VHDL code, describing what I made on the terminal one by one, the BLE device stucks at rebooting. For both applications I use the following sequence that is described in "RN4871_user_guide.pdf" page 59 : - Send $$$ - Wait a second - Send SS,40<CR> (this is to select UART Transparent feature only) - Wait a second - Send R,1<CR> - Wait a second -
  9. I need a second ethernet port on my Nexys4ddr board, so I got the PMODNIC100 ethernet connector. To get started, I was trying to follow the Getting Started with Digilent Pmod IPs Tutorial, but since I do not find any IP core for PMODNIC100 in Vivado 2015.4, I do not know how to proceed. Can you please guide me regarding how to send and receive data through the PMOD NIC100 ethernet connector?
  10. Hello, I have a Nexys 4 DDR board and was looking to interface with motors for a project I am working on. I found the Pmod STEP: Stepper Motor Controller (SKU: 410-267) and had a couple of questions about it: 1) Is this Pmod compatible with my Nexys 4 DDR? 2) How many motors can this Pmod device drive. If more than one can be driven by this Pmod, can each motor be controlled individually or would the same signal be propagated to each motor attached to this Pmod. Thank you!
  11. Hi I'm planning to use the pmod ISNS20 for a project. I want to interface it with nexys4ddr board. The pmod isns20 has 2 interfaces: input : hall effect sensor's input terminals IP+ and IP-; output: ADC's output terminals: SDO; I'm familiar with the usage of the output interface with the nexys4 ddr using the SPI protocol. However, I'm not familiar with the input interface. I want to know if a sense resistor has to be used across the IP+ and IP- terminals? If so, what would be the equation of current? If no sense resistor is used, how to connect the terminals IP+ and IP- to the circuit? An
  12. Hi, I am in the process of developing my own DDR2 controller as an exercise. Consequently, I'm trying to avoid using tools like MIG. Unfortunately I could not fully escape the clutches of automated tools, as in order to correctly configure the .xdc constraints file, I've had to have a peek at the following .prj file generated by the MIG in the official Digilent DDR2 Demo implementation: https://github.com/Digilent/Nexys-4-DDR-OOB/blob/master/src/ip/ddr/mig.prj I interpret the following line: "<InternalVref>1</InternalVref>" as setting the INTERNAL_VREF property to 1V. The
  13. Hello everybody, I'm a trainee in digital electronics, i should achieve a migration of VHDL codes from the Digilent Nexys 2 which is obsolete to another board, after some researches, I would like to work with the Nexys4DDR board. However, there is a problem of the number of connectors in the Nexys4DDR, in my project, I need at least 40 pins for my signals, it was possible with the Nexys2 thanks to the Hirose FX2 connector which disappears in the new Nexy boards. Should I choose another FPGA board or add an expansion to the Nexys4? In the last case, will there be synchronization problems?
  14. Hi! I own Nexys4DDR approx 1 year. I'm using it only for finished cores, so I'm in VHDL even not yet beginner, sadly for lack of time I began not to learn. Can anybody help me to create bitstream selector for choose which bitstream will be loaded and used? Why this Q and what I mean under help: I'm using mostly few cores, but it's for me hard to accessible Nexys4DDR board to exchange microSD card, so I want to place them into one and onlly if I find new then change/add. Help: I'm not able to create own project in VHDL, I can only follow instructions with help of possib
  15. HI, I am very new to Nexys4DDR. according to the tutorial, I try to run the board. But it's not working. 1) JP3 and JP1 connection is checked. 2) Use Prog UART port for programming 3) In Vivado, board_files were loaded Every time I run implementation without any error. But when I upload the programme, that is attached, the LD21 and LD22 is going to turn on but nothing happened according to the programme. just this thing is showing at TCL console: WARNING: [Labtools 27-3123] The debug hub core was not detected at User Scan Chain 1 or 3. According to
  16. Hi, I'm trying to read the Configuration Flash of the Nexys4DDR. I need to achieve a relatively high speed. Here is a short summary of what I'm trying to do: My design will be controlled by an external master and there is no way to delay the masters request. The start address is latched first. After that I have about 1 us until the first read request will be applied. The subsequent reads will occur in a burst with a read cycle time of about 350 ns. Each read must deliver 16 bits of data to the master. I've been thinking about the QSPI-Flash as some kind of boot rom. And now I'm trying out if
  17. jago

    Nexys4DDR Linux

    What happened to the Embedded Linux topic on the Nexys4DDR wiki page? It was "under construction" and now it's removed. I was looking forward to see this project since I got my Nexys4DDR. What happened? Didn't the Artix7 have enough power or did Nexys4DDR have to few ressources? Regards, Jago
  18. I am using Nexys4DDR board, xc7a100t-1csg324. While using ISE 14.5 or ISE 14.7, synthesize and implementation are done without errors. But, while generating the bitstream to configure the FPGA chip, this step is stucked (i.e., Generating bitstream is running and never stop) without any error. Maybe with the same design without any modification, this step is completed normally but the many times it is not. please someone help me with this point.
  19. Here's a game of tic tac toe in VHDL for the Nexys4 DDR, written as a set of finite state machines and not as a computer running a program. The design is inspired from John F. Wakerly's tic tac toe code from his book "Digital Design: Principles and Practices", but I've completely rewritten it. The game logic is contained in the files TTTdefs.vhd, TwoInARow.vhd and game_logic.vhd. The rest of the code is there to interface with the user: to print strings to the user, to get digits and to control when moves are made. There are also two UART driver components. You should be able to set this up as
  20. I have a question about how to program the nexys 4 ddr ( .bit ) if the page said The Nexys 4 DDR is not supported by the Digilent Adept Utility then as program the .bit, I use the ISE 14.7 and adept to all projects
  21. gmv

    Nexys4 ddr resource

    Hi, are there some news about nexys4 ddr resource time to release of Embedded Linux Materials and Advanced Microblaze Design with MIG, Ethernet, UART & GPIO ?
  22. Syaoran74

    Nexys4-ddr SD card

    Hi all, I'm currently working on a project, with a component to write an incoming video stream to a sd card. I was hoping someone could point me down a direction upon to implement a solution. I've looked into the SPI interfacing method. But am unsure how to implement it. I understand that i'll have to use microblaze to act as a processor for the image processing and what not but am unsure where to process forward. I have also looked into the native sd interface, but i am to understand that to do so would require licensing? Thank you for your assistance.
  23. Finally I arrived tu run petalinux on nexys4ddr launching by jtag. Now I'm trying to generate boot file for SD/USB drive but I have some difficult because fpga can't read MCS file, just BIT by SD/USB. It's possible convert MCS to a BIT ? Any help ?
  24. ingmar

    Nexys4-ddr Board Files

    I've just downloaded the "latest?" board files for the NEXSYS4 DDR and they appear to be buggy and preventing the MIG from generating.. Vivado 2014.3.1 complains with: Any suggestions? Cheers, Ingmar, Canberra, Australia
  25. Hi, I'm hoping to PWM an extra bit(s) out of the LSB of the VGA DAC on the Neyx4ddr board so I'd like to know what kind of bandwidth the VGA DAC has. On the schematic it has a 4k resistor, but what's the capacitance ?