Is a 12 MB/s microSD overkill for what the glamo driver does?
jimcolt at gmail.com
Wed Jul 30 23:07:45 CEST 2008
Oh well, I should have bought a slower card. At least it won't be a
I'll compare speeds I get with your 3M bytes/sec. anyway.
I was meaning 12 megabits /sec....
By 12MB/s I was referencing what I see here
12MB/s is not in the table shown in that link however I am about to receive
a 4G 80x or 12MB/s card in the mail .
Thanks for your input Tim and Andy,
On Wed, Jul 30, 2008 at 1:05 PM, Andy Green <andy at openmoko.com> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> Somebody in the thread at some point said:
> | Hey Tim,
> | "no" it's not overkill or "no" is the glamo driver able to read that
> | Are you involved with or knowledgeable of how the glamo drive works?
> | I'm not.
> I have that not very marketable distinction.
> We read from it at 16MHz / 4 bits, so not sure where this 12MBytes/sec
> figure came from. "Reading from SD Card" means collecting the block
> data into Glamo RAM, after we have it there we have to copy it into CPU
> RAM additionally.
> With some pending Glamo speedup patches in, effective Read speed is
> around 3MBytes/sec measured by md5sum-ing a 40MByte test file.
> - -Andy
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.9 (GNU/Linux)
> Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org
> -----END PGP SIGNATURE-----
> support mailing list
> support at lists.openmoko.org
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the support