Is a 12 MB/s microSD overkill for what the glamo driver does?

Andy Green andy at openmoko.com
Wed Jul 30 21:05:58 CEST 2008


-----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
fast?
| 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

iEYEARECAAYFAkiQu5YACgkQOjLpvpq7dMpFXQCeL1Tfkde286nK/4ADTFFMLPqK
LIoAmwSxRDrn90U3eE2OX5wVhAuZ5N97
=RFbe
-----END PGP SIGNATURE-----




More information about the support mailing list