Re: how to insert if...else logic between 2 blocks

[james jordan]

Hi Fabian,

thanks for your quick reply. i think python block is a good choice but how to define the block param as what i want? i only see there is a example param in the block. when i modify the code as below

def __init__(self, center_freq=1850e6, fft_size, freq_range):

grc can not interpret the source code. it shows "Param - Code(_source_code): Can't interpret source code: non-default argument follows default argument (<string>, line 16)"

how to deal with this?

---

From: Discuss-gnuradio <discuss-gnuradio-bounces+james.jordan.999=hotmail.com@gnu.org> on behalf of Fabian Schwartau <fabian@opencode.eu>
Sent: Friday, December 4, 2020 7:14 PM
To: discuss-gnuradio@gnu.org <discuss-gnuradio@gnu.org>
Subject: Re: how to insert if...else logic between 2 blocks

 

Hi James,

three options I can see:
1) Quick& Dirty: Implement both algorithms in parallel and use the Peak
Detector block to generate a 0 or 1 depending on your condition. Then
invert the condition, multiply the outputs of the two algorithms with
the two condition outputs and add them.
2) Depending on your condition and what you want to do, the Python
Module block may help. You can implement python function in it and use
them anywhere in your flow chart:
https://wiki.gnuradio.org/index.php/Python_Module
3) Build your own module:
https://wiki.gnuradio.org/index.php/OutOfTreeModules

Best regards,
Fabian

Am 04.12.20 um 10:36 schrieb james jordan:
> Hi ALL,
> i want to compute process a block's output then pass the result to
> another block's input. the process is not a fix equation but like this
> if(output > a)... else... so is there any way to do this without making
> a new block by myself. can i modify the generated python code to insert
> this logic? if i have to make a new block then how to make?
>
>
> <http://aka.ms/weboutlook>