# Building a Custom Flight Controller

Source: https://forum.modalai.com/topic/3186/building-a-custom-flight-controller
Category: VOXL SDK and Software (https://forum.modalai.com/category/47/voxl-sdk-and-software)
Tags: calibrate, px4, px4-firmware, camera, voxl-sdk
Posted: 2024-03-08 15:26:13 UTC by tyorb
Replies: 3 · Views: 2465

## tyorb · 2024-03-08 15:26:13 UTC

Hello,

Wondering if anyone here has worked on a custom flight controller stack not built on PX4, but which still uses Mavlink message standards. 

I just started on this effort.

If so, I would like to know where dependencies might lie outside of the PX4 build. What VOXL data pipelines would break? Quite new to Modal's stack.

Thanks!
-Ty

## Reply by Alex Kushleyev (ModalAI staff) · 2024-03-08 19:48:57 UTC

@tyorb , are you asking if it is possible to run a custom flight controller on VOXL2 DSP (this is where majority of PX4 is running on VOXL2, although there are some parts that run on CPU as well)?

## Reply by tyorb · 2024-03-13 18:31:31 UTC (in reply to Alex Kushleyev)

@Alex-Kushleyev, yes that would be the goal. I'm trying to identify where best it makes sense to run a custom flight controller in the current architecture. I realize I could do something external, but I would like to keep everything just to the VOXL2 using the I/O expander board for PWM output. 

I know this is quite a tough question that isn't very well defined, but I would really appreciate any advice if there have been attempts to perform similar things before.

## Reply by Eric Katzfey (ModalAI staff) · 2024-03-14 00:43:11 UTC (in reply to tyorb)

@tyorb It would be a massive undertaking and we would only be able to provide very minimal support. I'd definitely recommend against it.