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  1. Hi Digilent staff, and fellow forum members, Just wondering if you guys had considered making a USB HID -> PS/2 PMOD board? I was thinking of something like the circuit on the Nexys 3,4 boards which uses a PIC to convert a USB keyboard to PS/2 compatible signals. Would be handy for using newer USB keyboards/mice on PMOD socket equipped FPGA boards. PS/2 devices are becoming harder to find brand new. I (for one) would be interested in a few. Kind regards, Leslie
  2. Hi, I would like to know what IO standard would I use if I want to input a differential signal to two adjacent PMOD headers on PMOD JB. This differential signal will be an input to a buffer on the FPGA. The current xdc file on github uses LVCMOS33 as a default standard as shown below. set_property -dict { PACKAGE_PIN E15 IOSTANDARD LVCMOS33 } [get_ports { Input_data }]; #IO_L11P_T1_SRCC_15 Sch=jb_p[1] set_property -dict { PACKAGE_PIN E16 IOSTANDARD LVCMOS33 } [get_ports { Input_data }]; #IO_L11N_T1_SRCC_15 Sch=jb_n[1] Would it be fine if I use LVCMOS33 or should I use anot
  3. Hello, I am looking for a simple PMOD breakout board so that I can wire a cable to it. The cable goes to an RF front end eval board that has inconvenient connections. I would like the break out board to plug directly into the 12 pin PMOD connectors of my FPGA board.
  4. We are using PL section of the Zynq7000 to transfer data to another module b y creating a SPI IP Inside the PL. We want to know that the PMOD pins availvalble on the Zybo-Z710 board are using open drain or push-pull configuration ? Do they have something like a internal pull-up resistor ? Please let me know.. Regards Amol
  5. I am learning how to operate an FPGA, and I have to input a signal (which in itself is the output of a discriminator), and analyze it through a Basys3 FPGA. Looking at the available ports on the board, I'm guessing that it could be done using the Pmod ports, but even after hours of googling and going through the manuals, I failed to know which data ports to use, and how to read the signal after I've input it through the board. I've got references to some boards, in which GPIO ports are explicitly labelled, but I don't see any such labeling on the Basys3. So, it'd be really helpful if someone c
  6. Hello, I am currently working with the FPGA Board ZYBO Z7020. Part of my current task is: Apply a voltage to the AD2, the FPGA contains some logic and has to output the same Voltage with a DA2. I configured a VHDL I2C Master for communication with the AD2. I also attached an image with how I added the pullup Resistor in the schematic. I am using the internal voltage reference, which equals VCC = 3,3V. I am also watching the SDA Line with an oscilloscope to have a look at the data the ADC sends to me. I can apply an input voltage (DC) to the AD2 with a Waveform Generator. The AD2 works in
  7. Hi all, This is a quick and dirty howto. This howto describes how to use I2C modules (onboard and through PMOD connector) under embedded Linux. I've chosen to build my own Linux distro based on Linux kernel source for MicroBlaze softcore and busybox project for the init RAM DISK. My board is the Nexys4 DDR board. If you respect the following requirements for the HW design compatible with Linux, you can use Petalinux too. HW Vivado requirements (according to Xilinx UG1144) design to boot Linux: MicroBlaze with MMU support by selecting either Linux with MMU or Low-end L
  8. Hi, this is my first try to interact with a chip, so please bear with me if my question is dumb. I'm using Basys3 with the pmod MIC3. The ADC gives back 4 leading zeros and 12 bits of data. I can get this out of pmod. But how to interpret this data? I understand the main principle of the ADC - I get a relative value between 0 and 2^12. The pmod's reference says that this value is representative of the volume and frequency. I assume that this is a kind of composite value, like X high bits are the frequency, and the rest are for volume, or similar - but couldn't find anything about suc
  9. Hi guys, I've just bought a Pynq board. Could anyone help and give the main steps to follow to add a new PMOD device to the default overlay? I'd like to add the DA3 PMOD DAC that is currently missing. Many thanks!
  10. I've been working on a project and it is looking pretty nice. It is an ESP32 microcontroller, talking SPI to a PMOD AD5 that has two inputs across a 1 ohm 5W current sense resistor. At the highest ADC gains the steps are 2.5nA, but full range is about 20mA. I am currently currently running with a gain of 8, and can measure currents from a few nA through to about 300mA. Below is a graph of the startup current of another ESP32, with a spike a little after 30s when I get an image over WiFi - for now the data is just logged to a serial port at 50S/s and then I graphed in a Google S
  11. I'm trying to run the PMOD SD IP core on a Nexys 4 DDR, using simple drag and drop from the board tap. I also add a microblaze and an UARTlite for communication. I wish to run the SDK (autogenerated) example of the SD PMOD IP core. I have used the same approach with the OLED and several other PMOD and it worked out fine. But with the SD card it fails, I get these critical warnings. I am surprised there is a problem at all, since I only used the PmodSD IP core, written by Digilent. See below. The file of concern below: Thanks fo
  12. hello, I am new to designing with pmod wifi. I want to send audio files from pc to the zybo via pmod wifi and then process it then play it via output port. is it as easy as that example showed here? Bests, Meysam Sh.
  13. So for my senior design project we're using a microblaze to poll a number generator and then write that data to an SD card. I've adapted the demo code provided in the PMOD microsd driver files to take input variables and write them to a string. Then I take that string and write it to the SD card. My problem is that no matter what I try I can't print to multiple lines. I've looked in the DFATFS.h file where all the functions are abstracted but I'm at a bit of a loss. I'll attach a text file containing the subroutine that writes to the SD card (it gets called when ever there is a new value to wr
  14. varun332

    Pmod CMPS2

    Hi, I am working with the Pmod CMPS2 and an Arduino Uno to get an accurate reading of the direction a user is facing for a personal project. I am having trouble writing the code since the code on the website on Reference Materials is giving me a lot of errors. Is there any other code I can try?
  15. Hi all I'm currently working on a project based on ultrasound. I've created a pulsetransmitting board already which hooks into the zedboards FMC-LPC connector (I needed 64 high-speed channels), yet now I need to make a receiving side as well. Since returning signals are in the range of 250-300kHz, I was looking into ADCs of around [email protected] or 14bits. (max. 4 channels needed) Now is the problem that I can't find any spec on the frequency the zedboard PMODs can handle. Is it possible to have speeds of approx 20MHz or is this out of range of the (high-speed) PMOD connectors? Would it
  16. Hi! A couple of months ago, I bought a ZYBO Z7-10 board for one of my university labs. Just recently, I was using the JE PMOD ports to interface with an external LCD display. The board was programmed through QSPI Flash through the micro USB port. Unfortunately, a external 5 volt supply leaked into the 3v3 JE PMOD peripheral when the board was powered through the micro USB port. I immediately turned off the power supply and the ZYBO board once this had happened. After turning back on the ZYBO with all PMOD connections detached (to test if the board was still functional), the defa
  17. Hi, I am working on Zybo and not entirely sure how the outputs will behave when 2 leds are connected as the figure shows. Pins JE1 and JE2 are configured as PWM outputs for the PL on the same port (JE single-ended standard Pmod port) and the VCC and GND pins shown in the figure are located on the same port as well. The usual thing to do is to supply energy to the external led as shown on the left of the figure, but can I connect a second led as shown on the right at the same time? I understand the if the pin is an output, then current should exit from it, but what happens when current enters?
  18. NiLo

    Nexys 3 Pmod Nav Problem

    Hi, I am doing a project on Nexys 3 FPGA board and I am trying to connect Pmod Nav in order to display barometric pressure on PmodOLEDrgb. I am in trouble with Pmod Nav. I have created a Controller that reads via SPI Protocol the 24 bits of 3 data registers and then I have divided this result with value 4097 counts/hPa as it is mentioned in LPS25HB, in order to take the absolute pressure in hPa. The final value should be in range of 260- 1260 hPa. The problem is that the final absolute value of barometric pressure, that I take, is 4095, which means that all bits are stored in 3
  19. Serial digital interface (SDI) is a digital video interface used with the most of professional video cameras. It uses BNC connector and operates at speeds of 3 Gb/s or about, depending on the standard. The more detailed specification can be found in wikipedia. Most of the SDI adapters for FPGA use FMC connectors, like this one. There is no FMC connector on Zybo Z7 board, but it does have multiple PMOD ports. Could they probably substitute? If some simple extra circuitry is required, we maybe could build it on the top of some generic PMOD adapter like this. My major doubts are, would such
  20. Our team has been using the Digilent PmodCAN CAN-Spi module and have been running into issues related to reading the messages from the CANBus. We are using the mcp_can library that is compatible with this module to read messages from the CANBus, but the messages are coming in out of order and will sometimes miss messages when the CANBus is loaded with a higher number of messages in a short amount of time. I have attached the code I am using that returns messages out of order or misses messages completely. The code will miss around half of the messages when the CANBus has a Bus message load hig
  21. Hello All, I am getting a make error when attempting to build the PMOD ESP32 driver in Xilinx SDK. I will attach a picture of the the error and my SDK flow. I included all the path directories for the console application folder in the C/C++ Build Directories. The problem is essentially that "XPAR_PS7_UART_0_DEVICE_ID" doesn't exist. Is it under a new name perhaps? Should I export "Main.C" to the "src" folder? Any help is appreciated! **This is the line of code that is giving me the issue** "#define HOST_UART_DEVICE_ID XPAR_PS7_UART_0_DEVICE_ID"
  22. Hi , I am confronting dimensions mismatch in my design . So could I solve this issue by manipulating the dimension of PmodDA3_0 (pin : AXI_LITE_GPIO_wdata[31:0] ) , and keeping the rest of my design untouched ? If yes , how ? If no, what should I do? Kindly see the attached picture . Kind Regards
  23. Ahmed Alfadhel

    PmodDA3

    Hi , I am wonder why there are many Pins in the PmodDA3 IP core, while there are only six in the actual model ! Kindly, your explanations. I attached two pictures. Thanks,
  24. Ahmed Alfadhel

    Pmod

    Hi , I have encountered this error during runnuing Vivado Simulator : "formal port ja_pin3_io of mode inout cannot be associated with actual port ja_pin3_io of mode out " What I can do for avoid this error ? Kind Regards
  25. Hi, I wonder how fast I can trigger the HB3 Pmod (H-Bridge). Neither the datasheet or schematic give the references for its transistors and FETs. Is there somewhere I can find this information? Datasheet: https://reference.digilentinc.com/reference/pmod/pmodhb3/reference-manual Schematic: https://reference.digilentinc.com/_media/reference/pmod/pmodhb3/pmodhb3_sch.pdf