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SD card interfacing via SDIO - low throughput

Question asked by arbitrer on Jun 5, 2015
I was able to compile and run the code provided by Tilen from his web-site,

So I can mount , write and read data from file. But when I measured the throughput the measurement was very disappointing for read operation I got only 500KB/s which is lame for an SDIO operation,

I calculated the throughput but toggling a GPIO before and after read/write operation, for example

GPIO_SetBits(GPIOD,GPIO_Pin_4);
f_write(&fil,data_buffer,10240,&written)
GPIO_ResetBits(GPIOD, GPIO_Pin_4);


Is there something that I need to do , in-order to get a better throughput about 5-7MB/s
 

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