Flashing Simon K into F-40A ESCs - RC Groups
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Dec 03, 2012, 12:58 AM
The Engineer
prodriverex's Avatar

Flashing Simon K into F-40A ESCs

Many have heard of reflashing Simon K firmware and yet many had read but not attempted to do it.

Being The Engineer, I should not shunt away from the vast pages of info to read and attempt. Therefore, gathering all the tools necessary from past 2 months, finally took the plunge when an opportunity arose to build an Octocopter.

1. First, we need the programmer. I got this from HK:
USBasp AVR Programming Device for ATMEL proccessors
The device came with 10pins serial connector cable to the PCB end. At the other end of the cable there is a choice of 10 pins and 6 pins female socket.

Then I have to determine what type of connection I want to made in order to touch the ESC. Since I am flashing the HK F-40A ESC which has the pads in place, it is easier to made the cable and hotglue it to a cloth-peg style as shown. I learned this from this thread.

Here's the style I copied from:

As to which pin from the pad goes to which pin in the programmer, you have to refer to this diagram:

After flashing one with complete removal of shrink wrap, this is the subsequent one without removing all:

The peg connector:

2. Now to which program to use to program the firmware..
Starting from Page 1 of RCTimer/Turnigy/Hobbywing ESC DIY Firmware Flashing, there are 2 recommended route either from catch15117 or LadyZero.

Somehow, the former for me doesn't seem to download the firmware into the cache. So I tried the latter and KKFlashtool does work but my only complain is that why is the frame window and backgroud all in black? There's no window border and kind of confusing when you tried to set up (but anyway, nothing much to set up except clicking the file to load).

But before using the USBasp device, i have to download the correct driver for my Windows 7 machine from fischl.de.

When all is setup, it works like magic. And I mange to flash the bs.hex file into the HK F-40A.

Ok here are some important sites to refer to for flashing job:
Excel List of Updated ESC Models and FW
Image of ATMega chip pin out
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Apr 27, 2013, 05:57 AM
Professional UAV Services
Redemptioner's Avatar
Hey Champ,

Thanks for the thread, really helped confirm some things I was not 100% sure about this avo.
Apr 27, 2013, 07:17 AM
The Engineer
prodriverex's Avatar
Glad to be of help. :-)

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