2023-09-30 13:24:46 <KipIngram   > I'm starting to sketch out a way to manage the 32655 flash in a "wear leveling" friendly way.
2023-09-30 13:26:23 <KipIngram   > Basically I want a design that lets me just "write my way through" the flash, one writeable item at a time.  Then when I've used it all up I'll start over.  But any way you slice it, when I power on I need a smidge of information to "get oriented," and that needs to come from a uniform place.
2023-09-30 13:27:04 <Zarutian_iPad> 32655 is a 512KibiX8 flash memory that conforms to JEDEC pinout standard?
2023-09-30 13:27:15 <KipIngram   > So I think I'll use a single page to provide that.  On each power down, I'll write this critical piece of information to the next 128-bit word of that page.  And on power up I'll scan and use the last non-zero item, which will be the one I wrote last.
2023-09-30 13:27:31 <KipIngram   > And I won't erase that page until I've completely used it up, which will be 512 power cycles.
2023-09-30 13:28:04 <KipIngram   > The Max32655 is a system on a chip which contains an internal 512kB flash.
2023-09-30 13:28:40 <KipIngram   > From what I can tell rerading the docs, I erase it in 8kB pages and write it in 128 bit words.
2023-09-30 13:28:54 <KipIngram   > And read it any way I want to - the entire thing is mapped into the address space.
2023-09-30 13:29:34 <Zarutian_iPad> oh, I see I was going to recommend fram or memresitive chips I been seeing on digikey when doing parametric search for non-volatile memories
2023-09-30 13:29:38 <KipIngram   > So that one page I use as I just described will be the only page that must reside at an unchanging location.
2023-09-30 13:29:56 <KipIngram   > I'm going to arrange for everything else to be "mappable."
2023-09-30 13:30:03 <KipIngram   > To support the wear leveling plan.
2023-09-30 13:30:40 <KipIngram   > Thanks, but that's not quite the situation.  I've read some nice things about those chips, though.
2023-09-30 13:31:03 <KipIngram   > My flash is rated at 10k program/erase cycles.
2023-09-30 13:32:31 <KipIngram   > So that would mean I'd expect that one special page to last for 512*10k > five million power cycles.
2023-09-30 13:32:44 <KipIngram   > Ought to cover me.  :-)
2023-09-30 19:14:19 <MrMobius    > are you going to be writing a lot of forth code to this after its done or is this just for prototyping?
2023-09-30 19:57:55 <KipIngram   > This is intended to be a long term t hing.
2023-09-30 19:58:17 <KipIngram   > Once I have it, I want to use it for future projects, and all of that will be done in Forth, on that platform.
2023-09-30 19:58:44 <KipIngram   > The MAX32655 has a VERY nice array of built in peripherals, so that's an awful lot of capability to have "already in the can" on a project.
2023-09-30 19:59:18 <KipIngram   > So, the idea will be to design any new required hardware, drop a MAX32655 on there as "the controller," and then write the project specific software in Forth.