Hello guys!
I'm very happy to tell you that the MinimOSD is now in stock in the DIY Drones store!
And more: It goes with a nice customized CharSet and an open source OSD firmware already flashed! ;)
The firmware is Arduino compatible and it uses the original APM MAVLink messages to bring out with some nice features.
Here you can see the Artificial Horizon being tested on HIL side by side with the XPlane AH gauge.
Let me talk a bit more about the firmware that goes flashed on the board:
The current open sourced OSD implementation is part of the ArduCAM OSD project which has support from all the DIYD Dev Team.
The requested APM MAVLink messages are grabbed, translated and it's displayed pretty fast.
But... why it supposed to be fast?
Firstly, the OSD class descends from BetterStream from Mike Smith, which turns it able to format and print better than the Arduino's avr-libc variant does.
Second, the CharSet was rearranged to match the ASCII table. It eliminates the need for a "translation" layer.
There is also a smart way to write individual panels with less SPI transactions (that is conventionally used only to write the full screen at once).
The MAVLink parsing uses a reduced number of buffers, which fits better m328p's resources.
Those things above improves considerably the OSD job.
Our friend Jani already wrote the EEPROM routines to make it configurable. So, it has the base for an external configuration tool.
There is much more work to be done for adding functions and improve it.
We're pretty sure that it will be improved a lot in the hands of the awesome DIYD comunity.
Well, let's talk about features:
MinimOSD is able to work attached to the ArduPilot telemetry port in two modes:
1 - as master i.e. requesting rates of all required messages from APM (both TX and RX from OSD board are connected);
2 - as "sniffer" i.e. just listening to all the messages requested from the GCS (only TX from OSD board is connected).
The firmware auto-detects PAL or NTSC and adjusts the panels.
Until now it has this panels:
- MAVBeats pulse
- Altitude
- Speed
- Battery voltage
- Battery Remaining
- Throttle
- Number of Visible Satellites
- GPS Fix data
- Latitude
- Longitude
- Artificial Horizon
- Heading (0-360)
- Compass (N,E,S,W)
- Pitch
- Roll
- Distance to home*
- Direction to home*
*Based on spherical coords with geographic distortion corrected;
The hard work continues... but, the fun is already granted, of course!
Grab yours right now and happy flights! ;)
Comments
@Chris Kreuzer: To read RSSI on APM2 you'll need a receiver that exposes the RSSI as an analog output signal from 0 up to +5V. Spektrum telemetry has no RSSI exposed.
You will find analog RSSI output signal on virtually all Long Range System as an important resource for safe FPV flights.
Here goes a picture of my ChainLink receiver with RSSI output:
not really, Spektrum does output lost packets counts(- not signal strength), and seems to have multiple formats - depending on the version of the reciever.
If you want real info about strength/quality - You'll need to go for Graupner HoTT. - then see it on your transmitter.
@Chris Kreuzer: RSSI reading is part of APM2 roadmap. It's not available yet on current ArduPlane or ArduCopter's MAVLink data.
This is already in development for the next ArduCAM OSD firmware (2.0) for MinimOSD board.
So, when available on APM2 code, the OSD firmware will be in sync with it.
@Wayne, thanks by your video. The direction to home looks a little crazy in small areas. That's because GPS precision is about 10 meters. :)
@Graham, the repository isn't GIT. It's an SVN one. Please, try it with TortoiseSVN or so. ;)
MinimOSD test from wayne_h on Vimeo.
Sir, I already have a minimosd on way, you wont need it for a while, and you can always take my experiences about it.
@Andke, you can bought it from JDrones here .
@eagle123, great that's working fine for you too. =)
@Marc Puig, all done. Thanks by your feedback.
anyone know when this sweet piece of hardware is back in stock ? , or why it's gone after such a short time ?
@Binzi,You're much probably running a PAL signal in a NTSC capable device or a software configured to NTSC.
Thats why you have more lines passing the screen limits. We tested it in PAL and NTSC cameras. But, anyway, please, tell us more about your setup.
@Saiful, great that it's working!
Just a note: if you attach a NTSC or PAL camera it will auto-select the mode automatically on startup. The "Pal jumper" is to set what is the default video mode to run, when there is no video signal as input. It's a super-helpful resource for preliminary tests or even to go using it just as a telemetry monitor. Plus, If your camera is slow to start sending the signal it will force the default mode.
Resuming... now that you solder it, your MinimOSD will chose PAL to work if it cannot auto-select the mode. =)
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