Dynamic warm boot on the ice40

[BigEd]

A technique to warm-boot into one of 8 designs, which is more than the 1 of 4 supported by Lattice.

You can now fit as many bitstreams as you can in SPI-flash, and dynamically reboot to any of them from a running design, for no more than the cost of updating 4KB of SPI-flash

It's the ice40-dynboot subproject in this repo:

sylefeb/Silice

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[lawrie]

@BigEd Thanks for that.

It looks an interesting way of doing things.

Unfortunately, on the Blackice MX, it is hard to write a multi-boot configuration to the flash memory, unless you use my writeflash utility. And the Blackice 1 and 2 boards do not have any flash memory.

I hadn't seen that newsletter before. I have subsacribed.