JColvin

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Everything posted by JColvin

  1. Hi Hananz, Most likely you will need the PmodLVLSHFT (the Logic Level Shifter Pmod) to go with the JTAG programmer. I don't personally have a recommendation for which JTAG programmer to use, so I have asked some of our applications engineers to offer some more feedback. I'll also ask some of our applications engineers to provide some more clarity on this, but from my understanding you would need to configure the PL in order to be able to configure the ARM portion of the Zynq via PJTAG through EMIO pins, so perhaps it might be better to program the PS through the "normal" USB/JTAG port on the Zybo since you aren't required to program any of the PL. But again, I'll ask some applications engineers for some more clarity on this to make sure I'm offering accurate advice. Thanks, JColvin
  2. Hello, As a follow up to this thread, I have compiled a document that directly relates the FMC connector pins to the FPGA package pins (available for download in this comment). Additionally, I marked on a picture the relative locations of where each of the four rows of FMC pins are physically located for user's convenience. That picture is available here in our Forum Gallery. Let me know if you have any questions. Thanks, JColvin Nexys Video FMC to FPGA Connections.xls
  3. From the album: Forum photos

    The relative locations of the four rows of the FMC pins. The "bottom" of the FPGA has all of the pin 1's and the "top" of the FPGA is all of the pin 40's. The pin number increases numerically as expected along each "vertical" row.
  4. Hello, In principle, I suppose there isn't really anything stopping you from removing the RAM and replacing it with a chip of your own. Taking a look at the DDR2 Memory section in the Reference Manual, it appears that only the strobe and clock signals for the DDR were routed as differential pairs. It also says that the interface supports SSTL 1.8V signaling, although I do not know if all of the data lines could be changed to a different I/O standard (it sounds like you're hoping for 3.3V CMOS logic). I have asked some of our applications engineers for further input on this; they'll get back to you here on the Forum. Thanks, JColvin
  5. A customer on our website asked the following question: This is regarding your Genesys Virtex-5 FPGA Development Board. We are considering the use of your board in a medium production system. Question: We are already using ALL of the IO connectors on your board. We need more digital IO. Can we remove the SODIMM and replace it with a board of our own design in order to allow more digital IO to be used? If so, can the signals driving the DOSIMM socket be used as normal 3.3V signals, or is the voltage reduced on these IO pins because they are designed to drive the SODIMM? Can the IO pins be used a LVDS pairs (i.e. did you route them in pairs to the connector)? The response is below.
  6. JColvin

    Cmod A7 I/O questions

    Hello, Unfortunately, the Cmod A7 does not support 2.5V on it's IO pins nor does it does it support LVDS on the I/O pins (because it does not support 2.5V). Let me know if you have any more questions. Thanks, JColvin
  7. JColvin

    Cmod A7 I/O questions

    A customer on our website asked the following question: Does the CMOD A7-35T FPGA support 2.5V IO? Does the CMOD A7-35T FPGA support LVDS on the IO pins? The response is below.
  8. Hello, Do you intend to drive any sort of significant load with the DC motor? If not, you could always use the PmodHB5 with one of our two DC Motors (link and link). If you need a larger motor, I would recommend the PmodHB3 with it's screw terminals so you can wire up a larger motor to it. The PmodHB5 has both VHDL and Verilog examples for it on it's Resource Center here. Let me know if you have any more questions. Thanks, JColvin
  9. A customer on our website asked the following question: I am looking for a simple PMOD and DC motor kit to connect to a Xilinx ZCU102 (Ultrascale + MPSoC evaluation board). Something that is designed for a Zedboard should work. Do you a recommendation of Digilent products that can meet this need. I would like something that has example design files. The response is below.
  10. Hello, As per the description on this page, you can work with the board over the PCI bus. More information about the NetFPGA board can be found and is maintained on the NetFPGA site here: http://netfpga.org/site/#/systems/4netfpga-1g/details/ Thanks, JColvin
  11. A customer on our website asked the following question. I would like to know about NetFPGA Virtex-II Pro. Can I use PCI or PCIe slot (mainboard) to work with NetFPGA Virtex-II Pro? The response is below.
  12. A customer on our website asked the following question: I have 10 years programming LabVIEW and several years experience in PLCs (6 Siemens, 2 Rockwell). I am bored with PLCs b/c I would LOVE to do something basic like drive stepper motors directly. What product(s) do you sell that can enable me to do this? Thanks a million, The response is below. Hello, Many of the system boards on the Digilent website use 3.3V CMOS logic to operate their external I/O pins, so they are more suited to be the main controller to run the peripheral component that is able to support the current and voltage requirements on the motor. Digilent does have a PmodSTEP that can drive a 4 or 6 pin stepper motor, although you could also use something like the PmodOD1 to drive the motor at a high voltage and current rating. Let me know if you have any more questions. Thanks, JColvin
  13. A customer on our website asked the following question: I have 10 years programming LabVIEW and several years experience in PLCs (6 Siemens, 2 Rockwell). I am bored with PLCs b/c I would LOVE to do something basic like drive stepper motors directly. What product(s) do you sell that can enable me to do this? Thanks a million, The response is below.
  14. Hi buckd, I have asked some of our applications engineers about this; they'll get back to you here on the Forum. In the meantime, I know Digilent has an XADC demo for the Arty available on it's resource center, but the available documentation doesn't explain how to adjust the block diagram. Thanks, JColvin
  15. JColvin

    ATLYS_HDMI_DEMO

    Hi Isaac, I have asked some of our applications engineers about this; they will get back to you here on the Forum. Thanks, JColvin
  16. JColvin

    Nexys4 DDR Mechanicals.

    Hi popest, You can add up the distances from one of the earlier images (in this comment). In your case, the distance from the center of the mounting holes around the FMC connector to the edge of the board is 1.41 inches (for both mounting holes). Let me know if you have any more questions. Thanks, JColvin
  17. Very cool! That's actually super useful to be able to switch what range the AD2 is observing since that's always been an inherent limitation was the upper frequency the AD2 could detect.
  18. Hi Joe, Thanks for sharing your solution!
  19. Hello, I have asked some of our applications engineers to see if any of them happen to be familiar with changing a linker script; they'll get back to you here on the forum. Personally, I have found what was labeled as the "common-mz" linker script in the chipKIT Core as well as the bootloader hex file that is pre-loaded onto the WiFIRE (available on the WiFIRE Resource Center), but it seems that you have already located both of these. Thanks, JColvin
  20. Hi Can, I would use MPIDE to program the Cerebot board, primarily because that is the environment that we have example code (linked to by Dan) available for the PmodCLS. Alternatively, you can use the Arduino IDE with the chipKIT Core which is the IDE currently supported over MPIDE to program the board as well. Let me know if you have any more questions. Thanks, JColvin
  21. Hi samuelbear, I commend you for choosing to get back into electronics again! Since I presume you are referring to the Digilent WaveForms 2015 software, I have moved this post to the Scopes and Instruments section of the Forum where the engineer best suited to help you can see your question. As a follow up question though, which edition of Waveforms are you using? The 3.3.7 edition available on our reference site? Thanks, JColvin
  22. Hi mwagner, I didn't create the project listed, but looking at the code, I don't think hamster's particular setup supports stall detection since the stepper motor would need to have a couple of I/O lines for feedback, but I'm personally not seeing that. What you would probably need to do is set up some sort of external encoder or detector that checks for either a specified amount of movement or for movement in general that sends back a flag when movement is not as expected. Thanks, JColvin
  23. Hello, I have asked some of applications engineers to take a look at this; they will get back to you here on the Forum. Thanks, JColvin
  24. Hello, I've asked some of our applications engineers to chime in on this. Thanks, JColvin
  25. Hi Andrew, Unfortunately Digilent does not release the schematics for the JTAG HS2. All the information that we have available for it is on it's resource center here. I'm sorry I could not be of more help. Thanks, JColvin