Dual boot on STM32F427?

maxzor · ‎2016-08-13

Posted on August 13, 2016 at 11:59

Hello,

I am rather confused, as I have read software dual boot was only possible in f7.

But I recently came across dual bank boot options available on f4 : is it possible to dual boot on f4, in soft real-time?

I use the f427 chip on a flight controller board for a drone. I wonder if it is possible to switch firmware in-flight...

Best regards,

Maxime

#dual-boot

Tesla DeLorean · ‎2016-08-13

Posted on August 13, 2016 at 13:02

The 2MB models have two 1MB banks.

If you fork the code (from a common point in both banks) and clear the caching (ART) swapping the banks while running should be possible. The bank swap is a single bit, and changes the address decode. I'd use a common 16KB loader in the first sector of both banks to achieve this.

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maxzor · ‎2016-08-16

Posted on August 16, 2016 at 17:39

Thank you! Will have a further look into it.