Write a .bit to a SPI Flash memory from the microblaze

[lauziepi]

I'd like to send the content of a .bit file over Ethernet and write it in the SPI configuration memory starting at a specified start address. This should have the same effect as programming the flash memory directy from Vivado. The reason why I want this feature is that I will comminicate with up to 30 FPGAs from a computer, and I dont want to program all of them individually.

My question is, what exactly do I have to write to the memory? Can I simply manually write the entire content of a .bit file starting at the desired address in the config memory?

[lauziepi]

Also, I would like to know if this is a bad idea for some reason. What I plan to do is to combine this method of reprogramming the FPGAs with a multiboot system to fallback to a golden .bit if needed. Of course if for some reason the uploaded .bit breaks the ethernet functionality the cards would have to be reprogrammed one by one with a JTAG programmer but I can live with that.

[smarell]

Why don't you consider programming flash with .bin file?