Advice on new project, Dual micros via I2C

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Hello, I am seeking advice for my next project.

Its a pretty advanced led project running off of various pixel generators like simple fractals ect…, bluetooth, IR…

My pcb cannot be any larger than 10mm wide so I am limited on what micros I can use, even the AT91SAM3 bga is too large, but I need as much speed as possible mainly for future upgrades. So I was wondering what some might think about using 2 micros to perform various tasks. For example: Micro-1 will crunch the pixel generators, then after generating the frame send the data via I2C to Micro-2, then immediately start on the next frame. Micro-2 will send the data to the led strips to update the new frame, Micro-2 can also take care of bluetooth communication and IR input.

I am not familiar with I2C or working with multiple microcontrollers so I don’t know how much this will actually increase performance.

Possible micro setup would be Teensy 3 for micro-1, Propellers P8X32A for micro-2.

Any advice is appreciated.

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why not use an ARM Cortex M3, M4? Say, PJRC’s T3? It’s tiny, fast.

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If you need that much processing power, why would you essentially cripple all that fast data transfer by using I2C to communicate?

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stevech I would but I may end up getting a few hundred of these manufactured and assembled periodically and I would need to purchase mini54’s from Paul, which is fine but it would be a huge hassle with any PCBA company. I do have the teensy 3 and its great, although I wish it had a bit more flash

skimask I didn’t think piping 800 Bytes a frame through I2C would cripple processing too much, again I don’t have any real experience with I2C.