====== Loeffler EEG Task PC ======

Linux PC for running [[:tools:loefeeg#tasks]]

===== Audio =====

Psychopy 2025 has mutli-audio issues?
<code>
pip show psychopy|grep Version # Version: 2025.2.1
python3 ~/.venv/lib/python3.13/site-packages/psychopy/demos/coder/stimuli/soundStimuli.py
# 
Expression 'ret' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 1742
Expression 'AlsaOpen( hostApi, parameters, streamDir, &pcm )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 1774
Exception ignored in: <function Stream.__del__ at 0x7f6d58a85940>
Traceback (most recent call last):
  File "/home/lncd/.venv/lib/python3.13/site-packages/psychtoolbox/audio.py", line 236, in __del__
    self.close()
  File "/home/lncd/.venv/lib/python3.13/site-packages/psychtoolbox/audio.py", line 146, in close
    raise err
  File "/home/lncd/.venv/lib/python3.13/site-packages/psychtoolbox/audio.py", line 139, in close
    PsychPortAudio('Close', self.handle)
AttributeError: 'Stream' object has no attribute 'handle'
</code>

https://discourse.psychopy.org/t/error-with-auditory-stimuli-experiments/44921

https://psychopy.org/api/sound/playback.html?_gl=1*16ntnq1*_ga*NzY0OTEzMjEuMTc2MTU5Nzc0OQ..*_ga_96LHQFPY1F*czE3NjE5NDAwMjQkbzgkZzEkdDE3NjE5NDA1NTMkajYwJGwwJGgw#:~:text=0%20%3A%20Latency%20not%20important&text=The%20advantage%20of%20this%20move,the%20same%20throughout%20the%20experiment
===== Video Card =====
''GeForce GTX 760'' was pulled from the original task PC and put into the newest. <del>In the [[https://us.download.nvidia.com/XFree86/Linux-x86_64/535.261.03/README/supportedchips.html|supported list of cards]] for [[https://wiki.debian.org/NvidiaGraphicsDrivers#trixie-535|Version 535.261.03]] according to [[https://wiki.debian.org/NvidiaGraphicsDrivers#Debian-packaged_drivers|the debian wiki]]</del>. Kernel booted with 535 fails, errors with suggestion to use ''nvidia-legacy-390xx''. Booting that suggests adding ''ibt=off'', but that causes a kernel panic(?) or hang on Debian 13/sid. With the stock/open nouveau drivers, the card runs very hot and the fan is always on.

<code>
#apt install nvidia-tesla-535-kernel-dkms nvidia-tesla-535-driver firmware-misc-nonfree
apt install nvidia-tesla-390-kernel-dkms nvidia-tesla-390-driver firmware-misc-nonfree
</code>

===== Parallel Port (LPT) =====

==== Linux ====
Is ''/dev/parport0'', but ''lp'' module blocks access. ''/sbin/rmmod lp'' resolves that. Fix perminately by blacklisting the module.
 
<code>
echo "blacklist lp">>/etc/modprobe.d/blacklist
dpkg-reconfigure linux-image-$(uname -r)
</code>

==== Windows ====
Must install startech's driver ''StarTechPEX1P_LPT_64bit''. Card takes resource as ''LPT3''.

https://www.downtowndougbrown.com/2013/06/parallel-port-tester/

{{.:pasted:20251030-114751.png}}
===== Button Box =====

[[:tools:cedrus]] button box setup

> OSError: libftd2xx.so: cannot open shared object file: No such file or directory

https://ftdichip.com/drivers/d2xx-drivers/ [[https://ftdichip.com/wp-content/uploads/2025/03/libftd2xx-linux-x86_64-1.4.33.tgz|1.4.33 retrieved 2025-10-28]]
<code>
mv libftd2xx.so /lib/x86_64-linux-gnu/
</code>

[[https://community.cedrus.com/t/installing-pyxid/7047/5|Officially does not support linux (2021)]] but suggests will work in [[https://community.cedrus.com/t/cedrus-rb-844-not-detected-by-ftd2xx-on-linux/7204/3|2023]]. We have [[https://github.com/cedrus-opensource/xid_device_library/pull/3|a pull request for our fork/port]] for xid_device_library.

<code>
import ftd2xx; devs = ftd2xx.listDevices() # DeviceError: DEVICE_NOT_FOUND
import pyxid2; pyxid2.get_xid_devices()    #  []
</code>

<code>
dmesg -w

[ 5742.201934] usb 1-8.1: new full-speed USB device number 9 using xhci_hcd
[ 5742.295968] usb 1-8.1: New USB device found, idVendor=0403, idProduct=6001, bcdDevice= 6.00
[ 5742.295983] usb 1-8.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 5742.295988] usb 1-8.1: Product: FT232R USB UART
[ 5742.295992] usb 1-8.1: Manufacturer: FTDI
[ 5742.303576] ftdi_sio 1-8.1:1.0: FTDI USB Serial Device converter detected
[ 5742.303629] usb 1-8.1: Detected FT232R
[ 5742.304366] usb 1-8.1: FTDI USB Serial Device converter now attached to ttyUSB0


ls -l /dev/ttyUSB0
crw-rw---- 1 root dialout 188, 0 Oct 29 16:02 /dev/ttyUSB0

gpasswd -a lncd dialout
Adding user lncd to group dialout

# -------

sudo apt install python3-ftdi # brings in python3-usb
cat /etc/udev/rules.d/11-ftdi.rules
# SUBSYSTEM=="usb", ATTR{idVendor}=="0403", ATTR{idProduct}=="6001", GROUP="plugdev", MODE="0664"

udevadm control --reload-rules; udevadm trigger


python3 -c 'from pyftdi.ftdi import Ftdi; print(Ftdi.show_devices())'
# Available interfaces:
#  ftdi://ftdi:232:1:8/1  (FT232R USB UART)

python3 -c 'import ftd2xx as ft; print(ft.listDevices())'
# [b'']

python3 -c 'import pyxid2; print(pyxid2.get_xid_devices())'
# []

#### remove conflicting module!
/sbin/rmmod ftdi_sio

python3 -c 'import pyxid2; print(pyxid2.get_xid_devices())'
# [<XidDevice "Cedrus RB-840">]

## try to make permanent again
echo -e 'blacklist ftdisio\nblacklist lp' >  /etc/modprobe.d/blacklist-lp_ftdi.conf
echo -e 'blacklist ftdisio\nblacklist lp' >> /etc/modules-load.d/modules.conf # above didn't work. this did
/sbin/dpkg-reconfigure linux-image-$(uname -r)
</code>