2008-04-07 16:51:45     spi_mmc perfomance

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2008-04-07 16:51:45     spi_mmc perfomance

Denis Grigoriev (RUSSIAN FEDERATION)

Message: 53765    Hi All! I have working spi_mmc dirver over spi framework. Read/write perfomance is 310 KBytes/sec on my bf533@400MHz, SPI bus is 20MHz. Is there any chance to get read/write faster? Setting bus speed to 25 MHz results no effect.

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2008-04-07 19:42:20     Re: spi_mmc perfomance

Frank Van Hooft (CANADA)

Message: 53773    Have you tried any different SD cards? I've seen some real variability in read & write speed with different cards, despite what the cards claim on their labels. My collection of cards range in speed from 50 kBytes/sec to around 650 kBytes/sec  (write speeds). I'm using a BF537-STAMP board.

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2008-04-09 03:52:08     Re: spi_mmc perfomance

Denis Grigoriev (RUSSIAN FEDERATION)

Message: 53883    I tried MMC card (310/310 KBytes/sec R/W), 2Gb SC card (310/310 KBytes/sec R/W), 64Mb older SD card (310/200 KBytes/sec R/W).

 

Is this the BF533 CPU throughput limit?

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