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at91samd: wait for nvm ready 91/7391/4
authorDan Stahlke <dan@stahlke.org>
Mon, 5 Dec 2022 02:12:16 +0000 (18:12 -0800)
committerAntonio Borneo <borneo.antonio@gmail.com>
Sat, 17 Dec 2022 09:33:40 +0000 (09:33 +0000)
commit77c7abe4e7569ca8bb23dad6110c7209c8c55558
tree85ccf65c5715f1bffb8ca5a75f321a468a398ce1tree | snapshot
parent0a829efda5c254ceca2371edb38e9b0e4a998706commit | diff
at91samd: wait for nvm ready

Flashing a SAMD21J17D was failing during NVM erase.  The samd21
datasheet specifies that one cause of error conditions is executing an
NVM command while the previous command is still running.  The solution
is to wait for INTFLAG.READY after a command is issued.

SAMD21J17A was not exhibiting this problem.  Perhaps the later silicon
revision has slower NVM erase times.

Signed-off-by: Dan Stahlke <dan@stahlke.org>
Change-Id: I19745dae4d3fc6e3a7611dcac628e067cb41e0f0
Reviewed-on: https://review.openocd.org/c/openocd/+/7391
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
src/flash/nor/at91samd.c diff | blob | history
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