Search found 2465 matches

by arnaud
Tue May 11, 2021 8:26 am
Forum: Loco Positioning System
Topic: LPS node problem
Replies: 2
Views: 23

Re: LPS node problem

Hi, For your first problem, we forgot to add the VM user to the dialout goup, if you run "sudo usermod -a -G dialout $USER" and restart the VM you will be able to access the node menu without any additional commands and the node configuration will work. What you see in your last screenshot is the no...
by arnaud
Mon May 10, 2021 1:19 pm
Forum: Developer Discussions
Topic: How to turn the propeller without attitude information from the sensor?
Replies: 4
Views: 48

Re: How to turn the propeller without the sensor data?

I am not sure what you mean by "sensor data", do you mean logging values using the log subsystem? I will try to answer your questions: 1) there are a couple of parameters that allows to control the motors directly. "motorPowerSet.enable" can be set to 1 to enable the individual motor control and "mo...
by arnaud
Thu May 06, 2021 1:59 pm
Forum: Developer Discussions
Topic: Debugging crazyflie
Replies: 3
Views: 28

Re: Debugging crazyflie

The Crazyflie is a 3.0V system. Yes SWIO is SWDIO, its a typo in the schematic.
by arnaud
Thu May 06, 2021 1:08 pm
Forum: Developer Discussions
Topic: Debugging crazyflie
Replies: 3
Views: 28

Re: Debugging crazyflie

the SWD lines and reset are required, SWO can be connected if you want to use ITM. This means: - GND - VCC - SWIO - SWCLK - SWO (Optional) - RESET That corresponds to the connector P3 of the Crazyflie schematic: https://www.bitcraze.io/documentation/hardware/crazyflie_2_1/crazyflie_2.1_schematics_re...
by arnaud
Thu May 06, 2021 1:04 pm
Forum: Developer Discussions
Topic: PositionHlCommander Localization system
Replies: 8
Views: 90

Re: PositionHlCommander Localization system

Something like that should work, yes. The easiest might be to send the position in a separate thread, this way you can separate the code that drives the Crazyflie and the code that update the position and you will be able to update the position more often than 10 times per seconds (100Hz should work...
by arnaud
Thu May 06, 2021 12:59 pm
Forum: Developer Discussions
Topic: Signal Processing at high frequencies
Replies: 2
Views: 51

Re: Signal Processing at high frequencies

2KHz using a task is complicated since the FreeRTOS scheduler is setup to work on a 1KHz tick, this means that sleep can only be setup in steps of 1ms and be >1ms. So the easy solution of having a loop in a task with delay is not possible. It is possible to change the tick time of the OS but this ri...
by arnaud
Tue May 04, 2021 7:45 am
Forum: Developer Discussions
Topic: Angular Velocity When Using Absolute Yaw
Replies: 3
Views: 45

Re: Angular Velocity When Using Absolute Yaw

I do not think anyone has ever measured this, sorry. It could be measured experimentally by logging the gyro measurement and making the Crazyflie yaw by steps a couple of time. There has been some paper published on making system identification on the Crazyflie. We list papers on our webpage: https:...
by arnaud
Tue May 04, 2021 7:36 am
Forum: Developer Discussions
Topic: FP16 in Log
Replies: 2
Views: 1460

Re: FP16 in Log

Hi, The latest master of the lib does support FP16 out of the box, this example demonstrate the functionality: https://github.com/bitcraze/crazyflie-lib-python/blob/50bb606cfefac1b9b25ab503c4c787cef786668b/examples/basiclog.py#L84. Since python 3.6, Python actually supports fp16 out of the box in st...
by arnaud
Mon May 03, 2021 12:29 pm
Forum: Developer Discussions
Topic: PositionHlCommander Localization system
Replies: 8
Views: 90

Re: PositionHlCommander Localization system

When using a mocap system you must send the Crazyflie position in your script to the Crazyflie. We have an example of that for Qualisys (https://github.com/bitcraze/crazyflie-lib-python/blob/master/examples/qualisys/qualisys_hl_commander.py) and there is a ticket discussing of a Vicon version of it ...
by arnaud
Mon May 03, 2021 9:01 am
Forum: Developer Discussions
Topic: Always a sudden disturbance in the 11rd second
Replies: 1
Views: 57

Re: Always a sudden disturbance in the 11rd second

Hi,

This is not something I have seen before. How are you controlling your Crazyflie, using the python lib or something else like ROS? If it is using the python lib can you send an example script that makes the problem apparent?