joplin-mdbooks-website/content/ardupilot/miscellaneous-notes.md
Stavros Korokithakis 4caaff6c90 Migrate to mdBook
2021-11-20 02:13:37 +00:00

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# Miscellaneous notes
These are random AP-related notes that wouldn't fit anywhere else:
## DJI FPV configuration
If you got some DJI goggles, here's the relevant configuration you need to make:
1. Set `OSD_TYPE=3`.
2. Set `SERIALn_PROTOCOL=33 SERIALn_BAUD=115 SERIALn_OPTIONS=0` (DJI FPV).
3. Create a text file called `naco.txt` on the SD card of the Air Unit with the text `1` in it [to unlock full power](https://oscarliang.com/dji-fpv-system-fcc-700mw/).
4. Create a text file called `naco_pwr.txt` on the SD card of the goggles with the text `pwr_2` in it [to unlock more full power](https://oscarliang.com/dji-fpv-system-1200mw-output/).
5. Set "Custom OSD" to "on" in the goggles menu.
6. Arrange your OSD elements how you like them.
That's it!
## DMA on the Matek F405-Wing
If you want to get DMA on UART3 of the Matek F405-Wing FC (or, more relatedly, the Racerstar F405, because UART1 is Bluetooth there), you can open `libraries/AP_HAL_ChibiOS/hwdef/MatekF405-Wing/hwdef.dat` and comment out line 92ish, where PA15 is defined.
That will enable DMA on UART3, at the expense of disabling the LED pad.
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Last updated on October 22, 2021. For any questions/feedback,
email me at <a href="mailto:hi@stavros.io">hi@stavros.io</a>.
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