Search found 11 matches

by rampudia
Thu May 13, 2021 12:57 pm
Forum: Developer Discussions
Topic: Using CMSIS DSP Transform Functions (FFT)
Replies: 1
Views: 44

Re: Using CMSIS DSP Transform Functions (FFT)

In the Crazyflie firmware in tools/make/cmsis/dsp/obj.mk I see that "arm_cfft_init_f32.o" is not present, I tried to add it but I still get the same error when compiling the whole project.
by rampudia
Tue May 11, 2021 7:47 pm
Forum: Developer Discussions
Topic: Using CMSIS DSP Transform Functions (FFT)
Replies: 1
Views: 44

Using CMSIS DSP Transform Functions (FFT)

Hi! I am trying to use CMSIS DSP transform functions inside a task I created for the Crazyflie but I am getting an "undefined reference error" (see below) which I find strange because I can successfully use other DSP functions like "arm_sqrt_f32" which I tried as a test. I have also tested the code ...
by rampudia
Thu May 06, 2021 6:28 pm
Forum: Developer Discussions
Topic: Signal Processing at high frequencies
Replies: 2
Views: 67

Re: Signal Processing at high frequencies

Ok thanks for the advice, if I succeed I will post the solution here.
by rampudia
Wed May 05, 2021 5:22 pm
Forum: Developer Discussions
Topic: Signal Processing at high frequencies
Replies: 2
Views: 67

Signal Processing at high frequencies

Hi! I would like to sample data from the ADC at a frequency of ~2kHz and process it internally before logging the result at the regular 10-100Hz with the python client. I am having a hard time accommodating this functionality in the firmware with an APP or a deck driver and for this reason I would l...
by rampudia
Tue Apr 20, 2021 2:15 pm
Forum: Developer Discussions
Topic: readAnalogVoltage - does it work?
Replies: 5
Views: 1782

Re: readAnalogVoltage - does it work?

3 years later... but in case it helps someone I made a very simple program that uses the APP Layer https://www.bitcraze.io/documentation/repository/crazyflie-firmware/master/userguides/app_layer/ to send an analog value to the client's console: #include <string.h> #include <stdint.h> #include <stdbo...
by rampudia
Tue Apr 13, 2021 9:15 pm
Forum: Developer Discussions
Topic: [SOLVED] Connection problems with radio and delay
Replies: 6
Views: 712

Re: Connection problems with radio and delay

The problem seems now to be solved by logging at 10Hz and also increasing the amount of resources allocated to the VM.

Also, important to set the USB controller in VirtualBox to USB2 and connect your CrazyRadio to a USB2 port.

Thanks for the help!
by rampudia
Fri Apr 09, 2021 11:09 am
Forum: Developer Discussions
Topic: [SOLVED] Connection problems with radio and delay
Replies: 6
Views: 712

Re: Connection problems with radio and delay

Oh in that case I think the following test of basiclog.py will bring clarity to what's happening: - I run the program and the Crazyradio's red LED is blinking for ~1:20min (more less consistently in multiple tests) while the console prints: Scanning interfaces for Crazyflies... - After this time, on...
by rampudia
Thu Apr 08, 2021 3:01 pm
Forum: Lighthouse positioning system
Topic: Using the Lighthouse deck for visible light communication (VLC)
Replies: 2
Views: 614

Using the Lighthouse deck for visible light communication (VLC)

Hi! I want to use the Lighthouse deck to take advantage of the photodiodes (PDs) onthe board to do visible light positioning without the need of creating a new custom board. I see that the PDs have a good enough sensitivity response in the visible light spectrum and I want to log the received signal...
by rampudia
Tue Apr 06, 2021 4:22 pm
Forum: Developer Discussions
Topic: [SOLVED] Connection problems with radio and delay
Replies: 6
Views: 712

Re: Connection problems with radio and delay

Thank you for the reply. I changed the crazy radio from a USB3 to a USB2 hub and I see that in all cases the red LED on the Crazyflie is flashing a lot... Even when the Crazyflie is close to the antenna and I tried in different rooms to check it was not external interference of some sort. In contras...