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cortexlab102 [2018/03/26 11:18] – [Creating a flow graph on your PC] trissetcortexlab102 [2018/11/19 19:59] (current) – [Sending the task to airlock] ooubejja
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 </code> </code>
  
-Some of these files as ''benchmark\_tx.py'' are already known to you. Some other are new, the only one that we will use is  ''usrp\_fft.py''. This script is used to configure the ''fft\_web'' bloc with all the necessary parameter: on which frequency it should listen, on which UDP port it should send its spectrum etc. +Some of these files as ''benchmark\_tx.py'' are already known to you. Some other are new, the only one that we will use is  ''usrp\_fft.py''. This script is used to configure the ''fft\_web'' GNU radio block with all the necessary parameter: on which frequency it should listen, on which UDP port it should send its spectrum etc. 
  
 The command line in the scenario.yaml file lists all these parameters, see below, and do not forget to change the number of the nodes corresponding to your tutorial. On can see below that the UDP port used here is 6663, please change it with the one associated with your tuto in the table above. The command line in the scenario.yaml file lists all these parameters, see below, and do not forget to change the number of the nodes corresponding to your tutorial. On can see below that the UDP port used here is 6663, please change it with the one associated with your tuto in the table above.
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 As it is not very convenient to work on CorteXlab server, we will explain here how to create flow graphs with GNUradio on your machine and export them to CorteXlab. We are going to create a new flowgraph called ''spectrum_analyzer.grc''. As it is not very convenient to work on CorteXlab server, we will explain here how to create flow graphs with GNUradio on your machine and export them to CorteXlab. We are going to create a new flowgraph called ''spectrum_analyzer.grc''.
 +
 +### Cloning the example task
 +
 +An example task is provided in the FIT/CorteXlab GitHub repositories. It is kept up-to-date and well prepared to run. First let us prepare to clone the example task.
 +
 +Let us start by erasing any previous (and possibly outdated) version of the example task already present in your home dir:
 +
 +<code>
 +cxlbusr@debian-jessie-cortexlab:~$ rm -rf examples
 +</code>
 +
 +Now let us retrieve the examples repository on GitHub :
 +
 +<code>
 +cxlbusr@debian-jessie-cortexlab:~$ git clone https://github.com/CorteXlab/examples.git
 +cxlbusr@debian-jessie-cortexlab:~$ cd examples
 +cxlbusr@debian-jessie-cortexlab:~/examples$ cd my_task
 +</code>
 +
 +### Creating our flow graph
  
 Launch, on your virtual machine, the ''gnuradio-companion'' tool Launch, on your virtual machine, the ''gnuradio-companion'' tool
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    * Generate Options -> No GUI     * Generate Options -> No GUI 
    * Run Options -> run to completion    * Run Options -> run to completion
- * Change the sample rate fot this flowgraph (double click on the “samp_rate” variable block):+ 
 + 
 + * Change the sample rate fot this flowgraph (double click on the “samp\_rate” variable block):
    *  set value to 2e6 (2Mhz)     *  set value to 2e6 (2Mhz) 
-  
  
 Now we are going to add two blocks to the flowgraph: Now we are going to add two blocks to the flowgraph:
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   * for USRP Source:    * for USRP Source: 
     * Sample rate -> samp\_rate (variable)     * Sample rate -> samp\_rate (variable)
-    * Center frequency -> 2.49e9+    * Center frequency -> your frequency! (for example: 2.49e9)
     * Gain -> 20 dB     * Gain -> 20 dB
     * Antenna -> TX/RX     * Antenna -> TX/RX
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     * fft size -> 256     * fft size -> 256
     * power max -> -50     * power max -> -50
-    * power min -> -10 +    * power min -> -100 
-    * port -> your port!+    * port -> your port! (for example: 6663)
     * frame rate -> 5     * frame rate -> 5
     * sample rate -> samp_rate (variable)     * sample rate -> samp_rate (variable)
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 Generate the flowgraph, a spectrum_analyzer.py should have appeared in the directory.  Generate the flowgraph, a spectrum_analyzer.py should have appeared in the directory. 
- 
- 
  
  
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 <code> <code>
 cxlbusr@debian-jessie-cortexlab:~/my_fft_web$ cd .. cxlbusr@debian-jessie-cortexlab:~/my_fft_web$ cd ..
-cxlbusr@debian-jessie-cortexlab:~/$ scp -P 2269 -r my_fft_web/ tuto#@gw.cortexlab.fr:~+cxlbusr@debian-jessie-cortexlab:~/$ scp -P 22 -r my_fft_web/ tuto#@gw.cortexlab.fr:~
 </code> </code>
  
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 <code> <code>
-you@srvairlock:~/my_fft_web$ cp ~/examples/fft_web/benchmark_tx.py ./ +you@srvairlock:~/my_fft_web$ cp ~/examples/test_fft_web/benchmark_tx.py ./ 
-you@srvairlock:~/my_fft_web$ cp ~/examples/fft_web/uhd_interface.py ./ +you@srvairlock:~/my_fft_web$ cp ~/examples/test_fft_web/uhd_interface.py ./ 
-you@srvairlock:~/my_fft_web$ cp ~/examples/fft_web/transmit_path.py ./ +you@srvairlock:~/my_fft_web$ cp ~/examples/test_fft_web/transmit_path.py ./ 
-you@srvairlock:~/my_fft_web$ cp ~/examples/fft_web/scenario.yaml ./+you@srvairlock:~/my_fft_web$ cp ~/examples/test_fft_web/scenario.yaml ./
 </code> </code>
  
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   node3:   node3:
-    command: ./spectrum_analyzer +    command: ./spectrum_analyzer.py
     passive: true     passive: true
 </code> </code>
cortexlab102.1522055923.txt.gz · Last modified: 2018/03/26 11:18 by trisset
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