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doc/openocd.texi: add entry describing atsamv user signature area

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Adds documentation entry for newly added possibility to program
ATSAMV family embedded flash signature area page.

Change-Id: I3bbaba304868dca49d6dd7006276d2d3a95facad
Signed-off-by: Michal Lenc <michallenc@seznam.cz>
Reviewed-on: https://review.openocd.org/c/openocd/+/9096
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
Tested-by: jenkins
This commit is contained in:
Michal Lenc
2025-08-25 15:39:15 +02:00
committed by Tomas Vanek
parent fcbe243c0b
commit 61d1d13a02
1 changed files with 12 additions and 0 deletions
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doc/openocd.texi
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@@ -6965,6 +6965,18 @@ This driver uses the same command names/syntax as @xref{at91sam3}.
flash bank $_FLASHNAME atsamv 0x00400000 0 0 0 $_TARGETNAME
@end example
These families also have a user signature area located at the beginning
of an embedded flash. This is a 512 bytes large page whose data are not
erased by assering ERASE pin or by software ERASE command. It can be
used to store configuration, keys, trimming values and so on. The area
overlaps with the beginning of standard flash and uses special commands
to perform write/read operations. OpenOCD locates the signature area
at fake address above 32 bit address space, specifically at 0x100000000.
@example
flash bank $_SIGNATURENAME atsamv 0x100000000 0 0 0 $_TARGETNAME
@end example
@deffn {Command} {atsamv gpnvm} [@option{show} [@option{all}|number]]
@deffnx {Command} {atsamv gpnvm} (@option{clr}|@option{set}) number
With no parameters, @option{show} or @option{show all},