> -----Original Message----- > From: EXT Peter Crosthwaite [mailto:crosthwaitepe...@gmail.com] > Sent: Monday, November 30, 2015 7:45 PM > To: Krzeminski, Marcin (Nokia - PL/Wroclaw) > Cc: qemu-devel@nongnu.org > Subject: Re: SPI EEPROM device model > > On Mon, Nov 30, 2015 at 12:53 AM, Krzeminski, Marcin (Nokia - > PL/Wroclaw) <marcin.krzemin...@nokia.com> wrote: > > Hello, > > > > I need to write some SPI eeprom device model (probably AT25128B or > AT93C56). > > I can not see any such device in qemu, but this time I want to ask > > before I start to implement, if something that can speed up work is already > present somewhere ? > > Maybe do you have some preferences which eeprom device is better to > have in qemu? > > > > So some of those EEPROM devices are nearly identical to M25P80 in > functionality, the main difference being that individual cells can be > programmed from 0 back to 1. A quick look at a AT25128B datasheet looks > like this may be the case. Read and write instructions as the same encoding > as M25P80. > > Search m25p80 for WR_1, which is a flag you can set that allows write of 1 to > individual bits. I think can become a feature of M25P80 (more table entries) > if > the basic instructions are just an M25P80 subset. > The goal of my question was to be sure that there is no such device model implemented somewhere. I target to extend M25P80 with some eeprom device, will see if this make sense.
Thanks, Marcin > HTH > > Regards, > Peter > > > Regards, > > Marcin
