transfer data into a text file

[issmaf44]

Dear Pavel, I would like to transfer digital data (at the output of an IP compiler) in vivado and send it into a textfile. Do you have any idea to do that?

Thanks for your help.

[pavel-demin]

I'm not sure if I understand the meaning of 'digital data (at the output of an IP compiler) in vivado'. Could you please provide a more detailed description or some screenshots?

[issmaf44]

I am trying to demodulate a signal. using redpitaya board. To try this I used a external amplitude modulated signal. The carrier of this signal is of 2MHz frequency. The sinusoidal signal is transmitted to a complex multiplier through the ADC. In this multiplier, data from the ADC and those from an NCO IP core are mixed. The ouptut of the mixer are then transmitted to a CIC compiler. The used CIC decimation have the following parameters: decimator, 3 stages, differential delay 1, 1 channel, fixed rate 300 input sample frequency : 125 MHz clock frequency : 125 MHz input data width : 14 bits quantization : truncation output data width : 14 bits all other parameters are unchanged

I would like to save the data at the ouput of the CIC compiler into a text file.

[pavel-demin]

Thanks for the details. Now, I better understand the problem. Since the resulting sample rate isn't very high (125/300=0.42 MSPS), both GP and HP buses supports this sample rate.

In some of my projects, I use a combination of fifo_generator and axi_axis_reader (https://github.com/pavel-demin/red-pitaya-notes/blob/master/projects/sdr_transceiver/rx.tcl#L244) that are connected to GP0 (https://github.com/pavel-demin/red-pitaya-notes/blob/master/projects/sdr_transceiver/block_design.tcl#L153).

In some other projects, I use axis_ram_writer connected to HP0 (https://github.com/pavel-demin/red-pitaya-notes/blob/master/projects/adc_recorder/block_design.tcl#L217). The adc_recorder project has a very simple C program that prints the ADC samples (https://github.com/pavel-demin/red-pitaya-notes/blob/master/projects/adc_recorder/adc-recorder.c).

Here are commands to create Vivado projects:

git clone https://github.com/pavel-demin/red-pitaya-notes
cd red-pitaya-notes
make NAME=sdr_transceiver xpr
make NAME=adc_recorder xpr

[issmaf44]

I don't really understand, if i see your project, you use an axi 4 stream FIFO which is combined to an AXi 4 stream Reader and a FIFO Generator.

Can you give me more explanation. Sorry I have a beginner in Vivado design suite.

Thanks for your help.

[pavel-demin]

When axi_axis_reader receives a read request from the AXI bus, it reads one entry from FIFO. The source code of the axi_axis_reader module can be found at the following link: https://github.com/pavel-demin/red-pitaya-notes/blob/master/cores/axi_axis_reader_v1_0/axi_axis_reader.v

[parveennisha]

Hi Pavel I am trying to implement the frequency counter project as given in this site http://antonpotocnik.com/?p=519284. While going through the axis _redpitaya_adc.v and axis_redpitaya_dac.v code what is the submodule ODDR. What is the logic of that submodule? From where i can get the whole code?

[pavel-demin]

@parveennisha, since your question is unrelated to this closed issue, I've created a new issue and copied your question there.