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Found 5 results

  1. Dear All, I have currently finished a PL program for signal processing and hardware controlling on the Zybo Z7010 board. Now, I want to ensure that some parameters can be easily modified by the user on a computer. Thus, I would like to use the USB -- micro-USB cable to instaure a communication between the user and the board. After some reading, I understand that I have to use the PS if I want to go through the micro-USB UART port (I have not yet used the PS in my project...). Hence, I need two things: - Instantiating the UART interface and writing the C/C++ script to ensure communication between User and PS - Creating a write/read connection between PS and PL to modify the parameters after reception by the PS. How should I proceed? As usual, feel free to ask for any further information. P.S. : Until now, I have used only Verilog and VHDL code to make the whole project run and am very uncomfortable with the "Block design" tool, so please be as specific as possible if block design is required (or faster/simpler...) Thank you very much,
  2. Dear All, "I'm working with Vivado 2018.3 and a Zybo Z7020 board" I write here because I have a very strange problem in a project that I have been developing in the past months. Namely, I've been writing a verilog code to run on a Z7020 board. This code takes user input as parameters (that are hence hard-coded) and everything works fine with this project (no errors or not understandable warnings...) Now, my job is to make sure that these so-colled parameters can be changed through a serial connection from a laptop. Hence, I've packaged my module in an IP and connected it to the PS, programmed the SDK and here is the problem : Many things work but some don't. At the beginning, I thought that the SDK used a different convention to represent signed integers (two complement, only first bit changed...) and have thereby checked that the parameters sent by the SDK where equal to hard coded values in the PL... and they are! Every single bit.. I'm now out of option to understand my problem... Has anyone had similar issues in the passt? Does anyone have a clue for me? Thank you a lot, P.S. : Please do not hesitate to write a comment if you need any further infos.
  3. Hi everyone, I am currently working with a Zybo Z7010 board on Vivado 2018.3 and am trying to implement a memory access in both reading and writing modes. More precisely, I'd like to enable the user to enter a number of coordinates that define a random waveform (sine table...) and to store it somewhere so that the PL can access it in reading mode and display it through a DAC. Please note that it is essential that the reading process is fast for further applications. Now, have been reading many things but I'm a little confused about the "different types of memories that exist". I'm not sure if I should use the BRAM module, the DDR, SRAM... What are the differences of these components and which one would you suggest to use? Finally, would you have a tutorial that goes through the different steps of the implementation? Thanks a lot, NotMyCupOfTea
  4. Hi everyone, After having succesfully managed to use de XADC of the Zybo Z7010 board as explained in this post, I am now trying to use a DAC Pmod (reference and documentation here). After having checked the documentation, I have tried to write the SPI connection to the DAC (please find the verilog file and simulation in the attached files). Note, that I have decided to set the l_dac signal to 0 to enable continuous output to an oscilloscope. The simulation seems to run well to me and to be in accordance with the documentation, however, the result is not satisfactory. Indeed, the signal I want to output is on 16-bits and the command "output = 16'b1111111111111111", which should give the max value does not reach it. Besides, when I ask to "output = 16'b1000000000000000", which should give half of the max signal, the output is almost zero. Finally, please find in the attached files the image I get on an oscilloscope when I input a sine signal with 0.5V offset and 1Vpp. Does aybody see what I am missing ? Don't hesitate to ask more details if needed. Thank you in advance, DAC_wiz_0.v DAC_wiz_0.sim
  5. Hi, Problem : I am new to FPGA and I would need to understand how to read an Analog input through the XADC to analyze it on the board and then be able to accordingly output a trigger for other machines. One simple thing that I would try to do for the time being is to read in the analog signal and wire it to a led so that I could effectively see the code is working. How do I do that ? Finally, one extra constraint is that I have to limit as much as possible the use of the Zynq processor (I'm not really sure this is achievable, please excuse my lack of knowledge). Product : I use the Zybo Z7 board XC7Z010-1CLG400C and Vivado Design Suite 18.3 What I have tried : I think the tutorial I've seen that best suits be needs is this one : Everything is alright until it comes to copy the instantiation template into the wrapper. I'm not really sure of how this works. After that, it is said there that the Digital input I'm interested in is named "daddr_in" ==> how should I extract it then to - let's say - connect it to a led ? Please find the Constraint file and project in the attached files and let me know if you need more. I have also made other attempts through this : Hence a question on the fly : when I open the SDK and enter a code in C, then I'm starting to ork on the PS isn't it ? Finally, I have also tried the XADC demo project on the digilent website but couldn't sort out how to adapt it to my needs. Thank you in advance for your healp, ! Zybo-Z7-Master.xdc design_1_wrapper.v xadc_wiz_0.v