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@ blu, your results are the ones i should expect but mine is really strange, it seems that the avr chip doesn't want to get erased, somehow it always wants to revert back to its stock firmware, even if i write the default fuses for atmega8 it will revert back to stock firmware fuse settings. its really strange because i never got this problem flashing my turnigy9x transmitter using the same usbasp hardware.
@pug.. i have used extreme burner, lazy's flashtool, avr burn o mat, and even parallel port programmer. all of which were able to communicate with the atmega and write on it. but somewhat were not able to pass write verification, and as i said even resetting the fuses doesnt seem to really change it even if avrdude reported that writing fuses are successful. |
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Maiden flight of Hexa with KK2 and Simonk F30A Hobbyking ESCs. Stock PI settings at 150. Tuning to be done. quite pleased but got to balance props and dail her in. I used Christian's Lazyzero flash tool and it worked very well. Thank you for the guides and he;lp. H |
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Last edited by shelterock; Jul 22, 2012 at 08:59 PM.
Reason: props to LzayZero
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anybody know if these esc's can be flashed with simonk ?
https://www.hobbyking.com/hobbyking/s...arehouse_.html |
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hi all!
i have a question: is it possible to mix different ESCs flashed with Simonk' FW? All in all? Or same "family"? (e.g. same hex file). thanks |
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Yes, you can mix them.
Preferably of same type - with crystal or without (i.e. tgy.hex or any of tp/bs/nfet targets). Why crystal? Because the tgy stuff with internal resonator will drift over temperature while all others won't. Otherwise it makes no difference, since firmware handles different hardwares same way. |
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Hi all,
Thanks to Simon, noe my red brick is not a brick any more. I flashed it with reverse enabled in order to get reverse thrust to slow down my edf jet on landing roll. However, its difficult to set the mix or t curve. it works but not best. Does any one know what variable to change in the source code, for 1. giving the motor a chance to spool down before I can kick in the reverse thrust. I know there is probably no way to detect the motor since its definitely sensor-less motor. I tried to enable delay but doesnt see any change. 2. setting the throtle range so i could mix both way properly. Right now with the mix I can get forward full speed , but reverse is already full at half a throtle. The mix for the forward (in order to get 0 thr at lowest posision) is weird. I had to set 1st point to 86% and goes to 100% on 5th point to get it working. and for the reverse it would go 1st 86% and at mid point -100%. thanks in advance |
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Hello!
Before I left for vacation, I added a variable strength (and speed) brake, but in a simple way that runs outside of the normal drive loop. This means that it cannot switch between braking and running without relearning the timing, which is not what I wanted, but was simpler to implement. I do want to try to get the PWM interrupt to support any combination of FET twiddling, but still haven't figured out how to do it cleanly and without making it slower. It's currently over-optimized, and of course I don't want to make it worse (this actually affects throttle linearity and the bump right before full throttle). Anyway, what this means is that there is currently no way to track the motor timing while braking. However, it can (and does) track it while commutating in reverse, even if the motor is spinning the other way. But there is no way to affect duty cycle limiting or delay reverse mode in favour of braking with the current approach. Note that being sensorless doesn't matter except when the FETs are fully on. It's easier to check when using sensors, of course, but we can still get some feedback. We just have to not exit the running loop while braking. Note also that throttle calibration also works when forward/reverse mode is active. You can select the pulse lengths for full forward, neutral, and full reverse. This may help you get the rate you want. However, there is also a neutral dead-band which is currently set in tgy.asm. If RCP_DEADBAND is set to 0, it would be very difficult to get the exact pulse length to stop the motor -- it defaults to 50 currently, which means neutral is extended to 50µs above and below the calibrated point. Perhaps this is causing some confusion? I also want to add a very low pulse length as being brake separately from coasting/neutral in forward/reverse mode, since this would help with my RC car with thumb brake, but this probably wouldn't help you. It might work for you to just have a SLOW_THROTTLE for reverse only. What is the issue exactly now? Is it just too strong in reverse mode? |
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Last edited by simonk; Jul 24, 2012 at 11:07 AM.
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Hi,
There are new hobbyking esc : https://www.hobbyking.com/hobbyking/s...C_4A_UBEC.html https://www.hobbyking.com/hobbyking/s...C_4A_UBEC.html https://www.hobbyking.com/hobbyking/s...C_4A_UBEC.html https://www.hobbyking.com/hobbyking/s...C_4A_UBEC.html Any information about their mcu ? fets ? |
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Last edited by maikodk; Jul 24, 2012 at 01:08 PM.
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