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Found 2 results

  1. Hello, I have recently purchased Zedboard along with Pmods AD1 and DA4. I want to implement Gradient Descent algorithm in the Zedboard using these Pmods with bandwidth more than 100 kHz. To get started, I tried to regenerate a analog signal using the Pmods AD1 and DA4. The experiment is completely explained with block design and output plots in the ADC_DAC_1_compressed.pdf. The SDK C code for acquistion and generation (adc_dac.c) as well as for finding max. working speed of DAC (dac_maxv.c) are atttached. The ADC clk is set to 20 MHz and DAC clk is to 50 MHz. It could be observed from the ADC_DAC_1_compressed.pdf that the maximum speed (frequency) the DAC (DA4) can write is only 33 kHz. The desirable acquisition and generation rate should be more than 200 kHz for my case. I identified that, the Xspi transfer written in the code (adc_dac.c) sends only 8 bits out of 32 bits of the DAC per clock cycle. Can we directly write all the 32 bits of the DAC in a single clk cycle using SDK ?? or is there any other way to make the ADC and DAC work faster?? What am I missing?? Looking forward to you suggestions and other similar references. Thanks in advance
  2. Hi, I'm trying to make PmodAD5 work with a Zedboard by using Vivado 2016.2 (can also use earlier versions if needed). Digilent has a nice wiki pages to use Pmods with Zedboard, especially for using Pmod IPs: https://reference.digilentinc.com/learn/programmable-logic/tutorials/pmod-ips/start In this tutorial, however, there is no PmodAD5, and there reference design linked from Digilent product page to AD also has the implementation example for Xilinx ISE 14.4: https://wiki.analog.com/resources/fpga/xilinx/pmod/ad7193 Nevertheless I tried to combine the information I could find to start with a ZYNQ7 Processing System with AXI Quad SPI IP. (I managed to work with that way with a MAXIM Pmod temperature sensor). But I got stuck at some point as to communicating with PmodAD5 device. After HW and SW implementation I am getting the following output on the UART: Status Register: 0x0 Mode Register: 0x0 (The second one should be different than 0x0 according to documentation) Is there someone out there tried PmodAD5 with Zedboard who could help me? Since this is my first post I tried to explain the overall status. If there are questions specific to the project I am more than happy give additional info. Thanks.