From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ulf Samuelsson <ulf@atmel.com>
Date: Thu, 25 Oct 2007 18:30:54 +0200
Subject: [Buildroot] Dataflash rootfs problems (still)
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	<471F904A.5050206@promwad.com>
	<1193266654.4415.21.camel@aeglos.sweden.atmel.com>
	<6090c5eb0710250917o712570e1u28d1264d4d6bc4f7@mail.gmail.com>
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> What about using the SPI bitbang driver for the AT91??
> 


Not a good idea since you are transferring large amount of data.
Better to use the PDC and the H/W SPI.
Just set down the speed of the SPI.

>> ons 2007-10-24 klockan 21:34 +0300 skrev Ivan Kuten:
>> > >
>> > > During the 1st boot, Dropbear creates and "writes" the generated keys,
>> maybe
>> > > is this *write* operation the one screwing up the dataflash?
>> > >
>> >
>> > We have similar problems with Dataflash&RM9200
>> > *write* operation is unreliable - we had corrupted filesystem after
>> reboot.
>> > Our solution was to use r/o only on dataflash.
>> >
>>
>> I would reduce speed to 5 Mbps or lower. or implement the external gate.
>> Moving to the AT91SAM9260 is of course a nice alternative.
>> Lower cost, (soon) much higher speed (with the AT91SAM9260A)
>> Better BootROM (I defined it :-)
>>
>>


Best Regards
Ulf Samuelsson                ulf at atmel.com
Atmel Nordic AB
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