Read-modify-erase-write on per-sector basis?
> -----Original Message----- > From: openocd-development-boun...@lists.berlios.de [mailto:openocd- > development-boun...@lists.berlios.de] On Behalf Of David Brownell > Sent: Tuesday, December 22, 2009 8:23 PM > To: Øyvind Harboe > Cc: openocd-development@lists.berlios.de > Subject: Re: [Openocd-development] [patch/rfc] NOR FLASH: only > erase/unlock whole sectors > > On Tuesday 22 December 2009, Øyvind Harboe wrote: > > This is a bit worse than I thought. > > > > This breaks flash write_image as well. > > That was *this* problem report, in fact... > > > > Flash write_image will first erase all sectors in address ranges of > > all segments to be written, then it will write all segments. > > In short, kind of broken-by-design. When other portions > of one of those sector should not have been erased -- maybe > the portion being written was still erased! -- it's trashing > stuff that should have been left alone. > > Example: I might have two images to write, which don't > overlap. Erase, write one, write the next. Whoops ... it > needlessly erased part of the first image in order to write > the second one, because they used different parts of a sector. > > > I'm going to sort through the messages here and come up with > a solution that's not broken-by-design. > > - Dave > _______________________________________________ > Openocd-development mailing list > Openocd-development@lists.berlios.de > https://lists.berlios.de/mailman/listinfo/openocd-development _______________________________________________ Openocd-development mailing list Openocd-development@lists.berlios.de https://lists.berlios.de/mailman/listinfo/openocd-development
