About addr4reg

addr4reg · 2015-12-25

Posted on December 25, 2015 at 15:17Hello everyone.I'm trying to accomplish write speed above 6 Mbyte/sec on a Micro SD card using the STM32F4discovery. However, now I have only ~5.5 Mbyte/sec that is not enough for my purpose.My configuration is:MC...

addr4reg · 2016-03-17

Posted on March 18, 2016 at 01:07>Doesn't sound like the SDIO is that bandwidth limiting then?I don't think that the SDIO bandwidth is the problem. It is rather an SD-card controller issue. Take a look at this http://goughlui.com/2014/01/16/testing-...

addr4reg · 2016-03-17

Posted on March 17, 2016 at 19:49Well, it seems I reached write speed as high as 8 Mbyte/sec by increasing SDIO clock. However, this speed is only reachable when I continuously write large blocks of data. For instance, when I have 32 kbyte buffer an...

addr4reg · 2015-12-28

Posted on December 28, 2015 at 14:01Thanks for the explanation, clive1. I'll try to carry out some experiments with different memory cards and clock rates, to reach a maximum speed. If this doesn't help, I'll try to use another platform.

addr4reg · 2015-12-25

Posted on December 25, 2015 at 21:54Thanks for your answer, clive1. I tried to increase SDIO_CK from 24 to 42 MHz but got unproportional growth of the speed. It variates from 5.5 to 6.25 Mbytes/sec.This is not enough, because my data stream has the ...

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STM32F4discovery + SDIO + DMA + FatFS = low write speed

Re: STM32F4discovery + SDIO + DMA + FatFS = low write speed

Re: STM32F4discovery + SDIO + DMA + FatFS = low write speed

Re: STM32F4discovery + SDIO + DMA + FatFS = low write speed

Re: STM32F4discovery + SDIO + DMA + FatFS = low write speed