Hello!

I'm currently working on an alternative implementation of Thorlab's APT protocol in Python, which can be found on: https://github.com/UniNE-CHYN/thorpy

My code is GPL-2 licensed, which is not compatible with the MIT license you use, but feel free to borrow ideas for your implementation.

Since I don't have access to many stage/controllers, I would greatly appreciate any feedback/contribution.

Thanks a lot,

Laurent

Laurent

I trying to use your code on linux but I got some problems.
When I connect the device on Ubuntu, I've got:

new full-speed USB device number 15 using ehci-pci
New USB device found, idVendor=0403, idProduct=faf0
New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 3-1.2.5: Product: APT Piezo Controller
Manufacturer: Thorlabs
usb 3-1.2.5: SerialNumber: 81846609
ftdi_sio 3-1.2.5:1.0: FTDI USB Serial Device converter detected
usb 3-1.2.5: Detected FT232BM
usb 3-1.2.5: FTDI USB Serial Device converter now attached to ttyUSB4
usb 3-1.2.6: new full-speed USB device number 16 using ehci-pci
usb 3-1.2.6: New USB device found, idVendor=0403, idProduct=faf0
usb 3-1.2.6: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 3-1.2.6: Product: APT Piezo Controller
usb 3-1.2.6: Manufacturer: Thorlabs
usb 3-1.2.6: SerialNumber: 81845777
ftdi_sio 3-1.2.6:1.0: FTDI USB Serial Device converter detected
usb 3-1.2.6: Detected FT232BM
usb 3-1.2.6: FTDI USB Serial Device converter now attached to ttyUSB5

I'm trying to do "pyAPT.Controller(81846609)" but doesn't work.. I always receive a error -9 or -8 that means (erros that come from ftdi.h library https://www.intra2net.com/en/developer/libftdi/documentation/group__libftdi.html#ga3c5ccb0678b0e268b4081ea978e8eb78)
-8 get product description failed
-9 get serial number failed

Can anyone help me ?

Hi

I am wondering if anyone (i.e. @freespace, @dorox, @matteoschiav, @mn14tm, @PawelDefee, @pumphaus, @raouf-barboza, @teletoby, @vascotenner, @victorliu, @weinshec, @yuriy-kozlov, etc. ) have tested pyAPT under Ubuntu 18.04x6x with Controller BSC203 and linear stages NRT150/M?. I am asking that as I have been facing some communication problems and perhaps you have some advice. Let me share how I am setting the USB port, library installation and then show the terminal output for get_info.py

USB setting up

First, *ftdi.rules have been setup as follow

/etc/udev/rules.d/11-ftdi.rules

SUBSYSTEM=="usb", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="faf0", GROUP="dialout", MODE="0666"

/etc/udev/rules.d/99-libftdi.rules

SUBSYSTEMS=="usb", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="faf0", GROUP="dialout", MODE="0666"

Also, it has been changed the permissions and its group of the USB port of the controller as shown below.

$ ls -la /dev/ttyUSB0
crw-rw-rw- 1 root dialout 188, 0 Dec  3 08:09 /dev/ttyUSB0
$ groups
pyapt tty dialout sudo

Library requirements

pip install -r requirements.txtin (linearstages) virtual environment with python3 using a standard user (i.e. no root user).

Issue the python get_info.py just get stuck:

I am not sure what I am missing perhaps you have some hints for the following bug:

(linearstages) pyapt@$MACHINE:$HOME/pyAPT$ python get_info.py 
Looking for APT controllers
Found b'Thorlabs' b'APT Stepper Motor Controller' S/N: b'70112214'
###  TESTING get_info.py  ####
serial=    b'70112214'
pyAPT.Controller(70112214) =    Controller(serial=70112214, device=<pylibftdi.device.Device object at 0x7f0847d4c5c0>)
message.MGMSG_HW_GET_INFO= 6
reqmsg= Message(messageID=5, param1=0, param2=0, dest=80, src=1, data=None)
6

Any ideas?

Exception has occurred: TypeError
ord() expected string of length 1, but int found

I can contribute to solve that as soon as the owner is still working on it

Hey,

I just discovered that the code output is roughly by a factor of 14/20 false in comparison to the real distance.

Do I have to adapt this file to my stage (KDC101)?
https://github.com/freespace/pyAPT/blob/master/pyAPT/prm1.py

Thanks a lot!

Felix

Hello I'm working on adapting this code to work with a Thorlabs k-cube piezo controller for a project for my Masters degree. While, I can use it to identify the controllers I got the following error when I tried to set the drive voltage:

File "/usr/local/home/labuser/pyAPT/pyAPT/controller.py:, line 536, in opset
setmsg = Message(message.MGMSG_PZ_SET_OUTPUTVOLTS, data=setpar)
File"/usr/local/home/labuser/pyAPT/pyAPT/message.py:, line 66, in new
assert(type(data) in [list, tuple, str])
AssertionError

Did the data type for the variables handled in the coms protocols need to be predefined in the controller code or do I need to modify the code in the message code?

I've attached copies of my set voltage code as well as the modified controller code.

Any assistance would be greatly appreciated.

code.zip

Currently velocity_params cannot be set from python 3. I hope to fix this this week.