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Found 19 results

  1. Hey Digilent, I've successfully run the low_level_zmod_adc_dac demo on my board with a ADC and DAC ZMOD. https://reference.digilentinc.com/reference/programmable-logic/eclypse-z7/low_level_zmod_adc_dac I next decided to run the zmod_dac demo using both petalinux and baremetal. https://github.com/Digilent/Eclypse-Z7/tree/zmod_dac/master I was able to program the FPGA and also run the code, however every time it attempts to allocate a buffer to transfer the waveform via AXI DMA malloc is returning a 0/NULL value for the buffer address. If I am correct this means that mal
  2. Hello everybody, I want to implement a dac example into my fpga board (MYD-C7Z015). My input will be 32 bit. First 4 bits are command bit which are C3=0, C2=0, C1=1, C0=1. Next 4 bits are Don't Care Bits. After Don't Care Bits, 12 Bits will be nothing(space). Then the rest 16 bits will be my data.In other words, I try to implement LTC-2601 to 32 bit input. Now I have an IP with one output port. This Slave Ip has 4 registers. Also I use Zynq-7000 Processing System IP. In each rising edge of Zynq 7000 Processing System IP's clock I look at one bit and assign that bit to my slave regist
  3. 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. I
  4. Hello everyone, I am looking for an ADC and a DAC of at least 2 MSPs and a resolution greater than or equal to 12 bits. I do not want to use ADC or DAC with an FMC type interface (I do not have enough free pins on my FPGA card). A serial type interface (SPI) would be nice. Are there PMODs that have these characteristics? If not, can you recommend an ADC / DAC with these characteristics (> 2 MSPs and> 12 bit resolutions)? I have to process signals of frequency <= 10 kHz and send them to a DAC with a resolution of at least 12 bits and an acquisition speed of at least 2 MSPs. Th
  5. Hello Technicians, I want to output a signal (FHSS_TX) in 2nd picture via a Pmod_DA module. In fact, I have the IP core of this Pmod (Pmod_DA3) , but I don't know how to merge the second design (my project in 2nd picture) with the first (Pmod & microbalze 1st picture) to out put my signal via the Pmod_DA3 , Kindly , find the attached pictures . Looking forward your supports . Thanks in advance.
  6. Good day wizards, I've tried to introduce myself here, but now I would like to ask for a comment on my thoughts. My goal is to master audio processing (mainly routing and level controls for a beginning) on FPGA. The diagram will be very simple: Audio signal generator => ADC => FPGA => DAC => Analyzer (Spectrum, THD, Level) Audio signal generator will be made of two NE555 clocks with different frequencies (say 1kHz and 15kHz) to have a difference between L and R channels. ADC will be CS5381 ([email protected]), I2S output. DAC will be CS4390 ([email protected]),
  7. Hi there, I've been using the Analog Shield with a UC32 for controlling and measuring different parameters in a physics experiment. I've noticed that for certain voltages, the DAC (and ADC) both have offsets on the order of 10 - 40 mV relative the value that they are being programmed to (or being feed to by a power supply). This offset seems to be random (in that it doesn't follow a specific trend), although it is consistent for the same ADC/ADC. I've also seen that the offset pattern is different for different DAC/ADCs on the same Analog Shield and I've also tested this on different Analog
  8. CKV

    PMOD AD1 HDL codes

    Hello, can I get the HDL files for the PMOD AD1? Exactly I need code which can take the AD1 outputs D0 or D1 to HDL module and gives me the output has 12bit number. so that I can process these 12bit numbers in subsequent modules.
  9. ATIF JAVED

    ADC DAC SELECTION

    I want to interface DAC and ADC with some fpga evaluation board My requirement of ADC and DAC is following DAC input ->sampling_rate=2MS/s frequency=455khz ADC Input ->Signal bandwidth=400khz i have no problem of resolution So someone please guide me or refer me some models of adc and dac along with some FPGA evaluation board that complete my requirements . Also refer me if anyone know about some board that have build in adc dac along with FPGA Any kind of help in this regard would be much appreciable
  10. hello everyone I'm using fpga spartan 3 with DAC tl5615 which want really supported my purposes ( because i needed a DAC with higher resolution )i needed new DAC as i came across with pmod i2s here is the link https://store.digilentinc.com/pmod-i2s-stereo-audio-output/ so as i'm new with driving DAC (Primary IC is cs4344) i was wondering if anyone ever drive DAC before ? i search all the net but couldn't find anything best ethan
  11. i want to generate sine wave on dac (pmodda3)(http://www.analog.com/media/en/technical-documentation/data-sheets/AD5541A.pdf)and i am using spartan3e but there ara several warnings ,How can i fix the warnings? i loaded code and picture. help me please ---------------------------------------------------------------------------------- library IEEE; use IEEE.STD_LOGIC_1164.ALL; use ieee.std_logic_arith.all; use ieee.std_logic_signed.all; use ieee.numeric_std.all; entity kecelikalem is port( clk: in STD_LOGIC; reset : in STD_LOGIC;
  12. Hello, dear collegues! I work with Nexys Video board. I use VHDL. Now I try to create project with PmodDA4. I have 4 variables which I obtained inside the project and I want to obtain it like 4 analog signals. I have found an example, but when I tried to implement it for my board it does not work (code is bellow)... If it is some example code for this PmodDA4, please send it... I could not find it for this board. -- The four left-most switches (SW15-SW12) define the command, i.e. 0011 -- The four switches after (SW11-SW8) define the address, i.e. 1111
  13. We have a couple of DA3 modules connected to a pair of Xilinx Spartan 3 FPGAs. We are generating an audio ferquency baseband signal with at 200 ksps. Looking at the buffered output from the module we periodically see a sub-1us 500uV pulse approximately every 100 samples when outputting a small signal sinewave. Offsetting our sinewave by different amounts can make the problem either better or worse. The datasheet for the AD5541 DAC talks about a 'Digital-to-analog glitch impulse' that seems to explain our unwanted pulse. We have crudely filtered out this pulse with an 18pF cap from th
  14. Hi Friends, We are using the analog shield for measuring some analog feedbacks but we find out there is 0.65V off set for each reading chanels and also the open circuit voltage is 2V. Can you tell us what is wring in there?
  15. Hi, I have a question from a customer. Can anyone help? Would it be possible to do some simultaneous sampling with the analog discovery board with a sample rate of e.g. 500khz or is it time limited due the internal buffer length? Would it be possible for the ADC and DAC at the same time?
  16. Hey guys, I'm currently trying to spec a project using the Uno32 with the pmod shield. The pmod I would like to use is the DA4 digital to analog converter. I've noticed that in Diligent's reference section there is an example code section for the pmodDA1 which gives a zip file including examples, a library, and a library manual for using the DA1. However such resources don't exist for the DA4. Does anyone know if that library be necessary for using the pmodDA4, or where I can find some examples of using it? I'm not new to microcontrollers, but I am new to pmod... Any help would be apprecia
  17. I’m a PhD student working in a mechanics laboratory in France (LMT Cachan) and one of the goals of my thesis is to control a hydraulic testing machine using digital image correlation techniques. In order to do this, I need to take a photo of a sample, process it, extract 4 parameters and send them to the testing machine. This process needs to be repeated at a frequency of approximately 80Hz. We need a device to send these values from a Linux computer to the 4 analog entries of the machine (0-10V, 0.5 mA) by coaxial BNC cable. We managed to do this for one channel using an USB connected oscill
  18. Hi, I was working with the PmodDA4 to get it up and running, but was having trouble to get it to work since I didn't know how the 32 bit Word the reference manual claimed I needed to send was supposed to look like.
  19. Hello! If you have ever used something that produced sound through a speaker, than you have indirectly used a Digital-to-Analog Converter, or DAC for short. Many tutorials on how to use a DAC will cover how to use a R-2R resistor ladder which is one of the popular ways that DACs are constructed. However, not very many explain how you might use a DAC that is already created in a small IC chip, such as the one present on the PmodDA4. But no more! You can learn more about DACs in general from the Digilent Blog as well as how to use an IC DAC from this Instructable.