2008-03-17 10:53:25 about spi/mmc card read/write speed?
浩 何 (CHINA)
i have test the spi/mmc card speed : cp /bin /usr/spi_mmc -rf
it's about (1.6-2)Mbit/s, i'll ask a question , what 's the highest speed of the spi/mmc write!
Does the spi/mmc driver in /linux-2.6.x/driver/mmc/spi_mmc support 2GB, 4GB SD card in VFAT filesystem
if support, which version i 'll download
2008-03-17 12:38:09 Re: about spi/mmc card read/write speed?
Mike Frysinger (UNITED STATES)
Message: 52591 the highest speed you could possibly achieve is limited by the speed of the SPI bus ... it tops out at SCLK / 4 (so typically ~25mhz)
as for filesystems, you're asking a question about technologies which are not dependent on the other ... filesystems do not care what block device they sit on top of, so of course the spi mmc driver supports anything because it doesnt care ... it only transfers blocks of data; it's up to higher levels to interpret those blocks