Re: [Discuss-gnuradio] IIR Filter ?

Hello,

Which version of GR are you running in Windows?  Previous versions were not compatible with the filter designer.

Also, could you give us a screenshot of your GRC flow graph?

Geof

On Sat, Sep 22, 2018 at 17:41 jf.devois@gmail.com <jf.devois@gmail.com> wrote:

Hello

I 'm an old  french Applied Physics Teacher   and I try to use  basic GRC  for  my electronics students (2 first University  years in a technical Department) as a learning tool since 2016

I   use GRC  under Pentoo Linux  if I need to  run  HackRFone/osmocom   and/or  DBTVstick/RTLSDR   

 and Windows7 if not because GRC under  W7 doesn't run the source/sink

I'm not a computer expert   evenif  I practise a little Arduino and python  ( I was rised with Fortran/Pascal math computing a long time ago)

I choosed  GRC as a free alternative to Labview  too expensive and too   much to handle  for DSP 

I tried to  design a IIR  Filter  like an FIR  with / delay /  add/ sub /multiply const/    blocks  looped  : failure  

I tried to run   the IIR  Filter block under W7 : failure

Error 0:
Block - blocks_add_xx_1 - Add(blocks_add_xx):
Source - out(0):
Port is not connected.

Error 1:
Block - blocks_add_xx_1 - Add(blocks_add_xx):
Sink - in0(0):
Port is not connected.

Error 2:
Block - blocks_add_xx_1 - Add(blocks_add_xx):
Sink - in1(1):
Port is not connected.

Error 3:
Block - blocks_add_xx_1 - Add(blocks_add_xx):
Sink - in2(2):
Port is not connected.

Error 4:
Block - blocks_add_xx_1 - Add(blocks_add_xx):
Sink - in3(3):
Port is not connected.

I tried  under W7 a python program

GNUR Radio Embedded Python Example 3 - IIR Filter

Prepared by Dr. Aaron Scher 
aaron.scher@oit.edu 
Oregon Institute of Technology 

Failure

The python block  ask me for an editor 

Block paths:
C:\Users\user\.grc_gnuradio
C:\Program Files\GNURadio-3.7\share\gnuradio\grc\blocks

Loading: "C:\Users\user\Desktop\RII_4_4.grc"
>>> Done
>>> Unable to load the default editor. Please choose an editor.
>>> No editor selected.
>>> Unable to load the default editor. Please choose an editor.
>>> Error opening an external editor. Please select a different editor.
>>> Error opening an external editor. Please select a different editor.
>>> Error opening an external editor. Please select a different editor.
>>> Error opening an external editor. Please select a different editor.
>>> Error opening an external editor. Please select a different editor.
>>> Error opening an external editor. Please select a different editor.
>>> Error opening an external editor. Please select a different editor.
>>> Error opening an external editor. Please select a different editor.
>>> Error opening an external editor. Please select a different editor.
>>> Error opening an external editor. Please select a different editor.
>>> Error opening an external editor. Please select a different editor.
>>> Error opening an external editor. Please select a different editor.
>>> Error opening an external editor. Please select a different editor.
>>> Error opening an external editor. Please select a different editor.
>>> Error opening an external editor. Please select a different editor.
>>> Error opening an external editor. Please select a different editor.
>>> Error opening an external editor. Please select a different editor.
>>> Error opening an external editor. Please select a different editor.
>>> Error opening an external editor. Please select a different editor.

I tried to open Notepad and then   the block is in an endless loop  It doen't ask for an other different  editor evenif   it's always a failure !

Is there a simple working   IIR Filter with taps ?

Thank you for your insights

  

---

jf.devois@gmail.com

Garanti sans virus. www.avast.com

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