Deriving MCU Pin Assignments from PX4 Source?

PX4 Autopilot
1

I am attempting to map the MCU pins for the HolyBro Kakuteh7Mini by looking through the files in its board directory ( PX4-Autopilot/boards/holybro/kakuteh7mini at main · PX4/PX4-Autopilot · GitHub ). The specific files I’ve referenced so far are:

  1. …/kakuteh7mini/nuttx-config/include/board.h
  2. …/kakuteh7mini/src/board_config.h
  3. …/kakuteh7mini/src/timer_config.h

Below is a screenshot with a sampling of some of the entries I’ve found so far.

image
image2242×322 150 KB

My issue is that I’ve only been able to come up with 54 different pin assignments. For reference, this flight controllers uses an STM32H743VIH6, which is a 100-pin, ball grid array package. I’m not necessarily expecting every single pin to be used/implemented, but I am definitely expecting more than 54, so I feel as though I may be missing something.

Has anyone else ever tried to to do something similar for other MCUs/Flight Controllers? I was originally expecting to find a file (or files) that had all of the MCU ports/pins assigned, but maybe I am operating off of a bad assumption? Is this the correct place to look for this kind of information?

Thanks in advance for the feedback!

2

Those files are indeed what you should check. A few more pins might be connected and assumed by default, such as USB and SWD.

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3

I”m working on the same board with v1.3. I use STM32CubeMX to better visualize pinout and clocking configuration.

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