hi all,
maybe it is manchester coding. on an oscilloscope it looks a bit like phase shifting. it's robust, delivers re-timing and has a small footprint of code in a mcu. it's e.g. used in infrared tv remotes. perhaps worth a try...
cu
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Tuning Ultegra Di2
63 posts
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Re: Tuning Ultegra Di2
by un0culus » Sat Jul 21, 2012 10:32 pm
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Re: Tuning Ultegra Di2
by Dr_Mutley » Thu Sep 20, 2012 5:43 am
has there been no progress made on the protocol as yet?
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Re: Tuning Ultegra Di2
by eddnshoulders » Tue Dec 04, 2012 9:05 pm
Hi All
I dunno if anyone is still working on this, but I'm a control engineer with experience in both signal circuit modelling and embedded programming. I've just bought a Di2 group and am keen to extend the functionality. I was bit deflated to discover this post showing that it wasn't simple CANbus (anyone know where the rumour came from that it WAS CANbus?).
Deluz and Jeffr - I was wondering if you would be willing to share with me the traces you've already captured on your DSO(s). I'll have a play in Matlab to demodulate the signal and decode the binary. Once we know what's required we can work out if it's gonna be worth proceeding with hardware. I do signal processing in Matlab and circuit modelling in SPICE day-to-day so this shouldn't take me very long.
I dunno if anyone is still working on this, but I'm a control engineer with experience in both signal circuit modelling and embedded programming. I've just bought a Di2 group and am keen to extend the functionality. I was bit deflated to discover this post showing that it wasn't simple CANbus (anyone know where the rumour came from that it WAS CANbus?).
Deluz and Jeffr - I was wondering if you would be willing to share with me the traces you've already captured on your DSO(s). I'll have a play in Matlab to demodulate the signal and decode the binary. Once we know what's required we can work out if it's gonna be worth proceeding with hardware. I do signal processing in Matlab and circuit modelling in SPICE day-to-day so this shouldn't take me very long.
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63 posts
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