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« on: December 24, 2014, 12:21:52 AM »
shikhargoenka
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Hello guys, I'm from Juhu, Mumbai trying to build my own Quadcopter.
I got an HW30A electronic speed controller(esc) from Lamington Road. It had a yellow covering with nothing written on it except HW30A. I bought 4 of these and they came with no manual or datasheet. I am trying to flash my escs but am unable to do so because I do not know what pins(MOSI, MISO, VCC etc.) are connected where on the esc. I have a usb avr atmel programmer. Here is a photo. Please let me know which esc is this and hhttp://
electronic speed controller question
ow I can flash it, if anyone has seen this before.  Sad

2014-12-22 14.35.19.jpg
electronic speed controller question
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« Reply #1 on: December 24, 2014, 12:38:38 AM »
buzz_rc
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You basically need to tap into 5 pins out of which 2 (power) are very easy to connect with the programmer. The remaining 3 data lines will need some good soldering skills since I don't see any solder pads on the pcb where you could connect the programmer . Look up the data sheet of the mcu (I think this one is a Atmel mega8 ) and identify the signal pins. Trace each signal pin to its nearest component and connect the appropriate pin from the programmer. A continuity tester will be helpful in finding out the connection points but this can be done without it as well. If you still have problems figuring this out, I can help you. I am not too far from you either.

Hope this helps.
Thanks
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« Reply #2 on: December 24, 2014, 12:50:46 AM »
shikhargoenka
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Hello Angad. where exactly do I have to connect the 2 power pins on the PCB. And about the remaining three remaining pins(MISO, MOSI, NC and one more SCK i think) or also the two power pins, do you mean i can connect them directly near the atmel chip as long as the 4-6 wires correspond on the atmel chip? Thanks
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« Reply #3 on: December 24, 2014, 07:40:37 AM »
santhosh-r
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I think a flashing tool will be appropriate if you don't like to waste time tracing the pins from the microcontroller.


http://4.bp.blogspot.com/-r5uqdFZchu4/UiuEYEucxBI/AAAAAAAAAQ8/u-8xQ8e71yQ/s1600/IMG_2217.jpg
electronic speed controller question


http://i.imgur.com/lDUlnGa.jpg
electronic speed controller question


If you need the pinout alone , here is the picture
http://s14.postimg.org/lwzmoz0v5/turnigymysteryblue12_A.jpg
electronic speed controller question
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« Reply #4 on: December 24, 2014, 08:42:42 AM »
sooraj.palakkad
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@Santhosh sir, that tool (or connector) looks trouble free !! , It would be helpful if you share, from where we can get something like that.
@shikhargoenka , Please read what is written on the micro controller on your ESC and post it here. I can help you identify the ICSP pins Smiley
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« Reply #5 on: December 24, 2014, 10:41:21 PM »
shikhargoenka
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@sooraj.palakkad the microcontroller on my IC says ATMEL ATMEGA8A AU 1422. I can't figure out the ICSP pins.

2014-12-24 22.35.52.jpg
Re: electronic speed controller question
* 2014-12-24 22.35.52.jpg (102.18 KB, 600x800 - viewed 330 times.)
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« Reply #6 on: December 25, 2014, 12:35:39 AM »
akhilzid
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Look at the attached pic for reference.

ATmega8A_l.jpg
Re: electronic speed controller question
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« Reply #7 on: December 25, 2014, 12:40:26 AM »
shikhargoenka
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@akhilzid I also found this picture on the internet. I have a usb avr atmel programmer. I dont know how to connect that to the respective pins because I don't have a atmel flashing socket firmware tool and I dont know the corresponding connections on the esc board, as is given in a photo by @santosh-r in this thread. Is there any other way I could connect them?
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« Reply #8 on: December 25, 2014, 01:27:07 AM »
akhilzid
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Every thing related this replied already.

third attachment in Reply #3 already shown pins that need to connect

if you dont have tool show by santhosh-r then you should solder 15,16,17 pins on atmega

4 and 29 pin can be soldered from other components(look at the trace on PCB)

3 is normally common ground so that can be connected from the GND connection on BEC Cable.
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« Reply #9 on: December 25, 2014, 08:57:48 AM »
saikat
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why are you trying to flash your escs ?? - give it a try with the original firmware - chances are you will
not notice a difference.

there was a world before simonk/blheli

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« Reply #10 on: December 25, 2014, 09:54:00 AM »
santhosh-r
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@sooraj.palakkad
you can get that flashing tool at http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=27195&aff=576071
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