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Nov 11, 2015, 06:41 PM
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RS2K's Avatar
Discussion

MultiShot, a OneShot125 replacement protocol.


MultiShot for BLHeli 14.5 files can be found here:
https://www.rcgroups.com/forums/showpost.php?p=34706081

BLHeli multishot repo:
https://github.com/cleanflight/blhel...ishot/releases

Imperial March:
https://www.dropbox.com/sh/cbn7ryllh...OF4ByJFfa?dl=0

Fast Start:
https://www.dropbox.com/sh/20du8uhad...RgqmF96va?dl=0

Crazy Start:
https://www.dropbox.com/sh/dd1rwgo8m...pF-a69sZa?dl=0

MultiShot Note: If you have trouble trying to tune out any bounce at center stick, please make sure it's not being caused by your transmitter centering springs. MultiShot is VERY fast and will result in your quad doing exactly what your transmitter tells it to.

I still recommend short calibrating the top 40 or 50 Ás short in the configurator.


1. Calibrate 2000 to 1000.
2. Set max throttle to 1955 in the configurator.
3. Find idle in the motor tab
4. Set min_throttle to the idle speed you found in the motor tab.


JulianGoesPro record a video of the process used in finding the perfect values:

Screen Recording: (skip to 02:00 to only see the "top end calibration")
MultiShot // Calibration // Mac (3 min 53 sec)


DSLR video:
MultiShot // Calibration // Canon (3 min 51 sec)





We've finally done it, OneShot125 is no longer fast enough to keep up with the fastest flight controllers. I have a new protocol in mind to replace it with.

In the interest of resolution, this is going to be more than just another multiplication of a normal PWM signal.

More information will be released soon.


We're gonna need some faster ESCs!
Revo running RaceFlight. Stupid fast looptime. (0 min 21 sec)
Last edited by RS2K; Dec 07, 2016 at 01:08 PM.
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Nov 11, 2015, 06:42 PM
Woohoo!
RS2K's Avatar
Reserved.
Nov 11, 2015, 06:42 PM
Woohoo!
RS2K's Avatar
Reserved as well.
Nov 11, 2015, 06:44 PM
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curious
Nov 11, 2015, 06:46 PM
Rgietsered Uesr
velez's Avatar
Indeed
Nov 11, 2015, 06:47 PM
Team Drone Art
Daryoon's Avatar
Nov 11, 2015, 06:48 PM
...
recursion's Avatar
Very nice!
Nov 11, 2015, 06:50 PM
-FPV it's a hell of a drug-
rotceh_dnih's Avatar
Cool , this has been on the cards for awhile now and with all these f4 boards coming out we'll need it
Nov 11, 2015, 06:53 PM
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SystemsGuy's Avatar
Be interesting to see what else can be squeezed out of an 8bit avr. ;-)
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Nov 11, 2015, 06:55 PM
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Nov 11, 2015, 06:56 PM
Quadaholic
--Oz--'s Avatar
Hopefully this protocol will last more than the 6 months oneshot did (J/K)

With the new FC's, esc's, and firmware, we are going to need new lightweight coreles motors
Nov 11, 2015, 06:57 PM
Woohoo!
RS2K's Avatar
Quote:
Originally Posted by SystemsGuy
Be interesting to see what else can be squeezed out of an 8bit avr. ;-)
I'm not sure the F330 and Atmega MCUs will be able to handle it. I blew one up during testing of the signal a few months ago. Since then I've only used F390s for testing it.
Nov 11, 2015, 07:01 PM
Woohoo!
RS2K's Avatar
Quote:
Originally Posted by --Oz--
Hopefully this protocol will last more than the 6 months oneshot did (J/K)

With the new FC's, esc's, and firmware, we are going to need new lightweight coreles motors
6 months is a lifetime in this hobby right now!



You don't need ESCs with a coreless motor since they have brushes. I've never heard of one being both coreless and brushless.
Nov 11, 2015, 07:06 PM
z33
z33
Registered User
Amazing work!
Nov 11, 2015, 07:11 PM
Quadaholic
--Oz--'s Avatar
Quote:
Originally Posted by RS2K
6 months is a lifetime in this hobby right now!



You don't need ESCs with a coreless motor since they have brushes. I've never heard of one being both coreless and brushless.
Yea, we both new that, my point was lightweight motor bells/magnets, as we are trying to change the rpm up/down faster than ever before. That heavy stupid steel bell flux ring is a large part of what we are fighting (mass wise),,,was my point

moving on, look at the IBM PC in early 1980's, they were using 64K ram, they thought, lets make the MAX ram 10 times, or 640K max, boy that was a very large mess. Think ahead on this new protocol and hopefully it will last for years to come, thanks!


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