python-feeltech

Python library for controlling FeelTech FY32xx waveform generators

Install with

$ sudo pip3 install feeltech

Library usage

To create FeelTech object

>>> import feeltech
>>> ft = feeltech.FeelTech("/dev/ttyUSB0")
>>> ft.type()
'FY3224S'

The two channels can then be accessed

>>> ft.channels()
[<feeltech.Channel object at 0x7f577b11fd10>, <feeltech.Channel object at 0x7f577b11fcd0>]

and to set various parameters

>>> c.frequency(30e3)

The calls can be chained like:

>>> c.frequency(30e3).amplitude(3.3)

Or even

>>> c.frequency(1e3).waveform(feeltech.SINE).sleep(3).waveform(feeltech.SQUARE)

To upload a waveform (decaying exponential):

>>> ft.upload_waveform(2, [int(e ** (-x / 1000) * 2 ** 12) for x in range(2048)])
>>> c.waveform(feeltech.ARB2)

Commandline tool

$ fytool -h
usage: fytool [-h] [--port PORT] {type,set,sweep,frequency,counter,upload} ...

FeelTech FY32xx control utility

positional arguments:
  {type,set,sweep,frequency,counter,upload}
    type                display the device type
    set                 set channel properties
    sweep               Perform a frequency sweep
    frequency           Show frequency measured
    counter             Show counter value
    upload              upload arbitrary waveform

optional arguments:
  -h, --help            show this help message and exit
  --port PORT, -p PORT  serial por

To set channel 1 frequency to 1 MHz, waveform to triangle and amplitude to 1V:

$ fytool set -c 1 -f 1e6 -w triangle -a 1

Reading the internal frequency counter

$ fytool frequency
1000010
$ fytool counter
545269

To perform a loagrithmic sweep from 1 kHz to 10 kHz, with period of 1 second and lasting for total of 50 seconds:

fytool sweep -s 1e3 -e 10e3 --period 1 --time 50 --type log --waveform square

TUI

There is also a curses interface to control the device

$ fytui /dev/ttyUSB0

There is a bunch of keyboard shortcuts:

m     -- take frequency measurement
n     -- take counter measurement
w     -- focus waveform
f     -- focus frequency
d     -- focus duty cycle
a     -- focus amplitude
q     -- exit
+/s   -- increments selected digit
-/x   -- decremenets selected digit

For w/f/d/a if the control is already focused, it focuses its counterpart in the other channel.