Hi everybody,
I have interfaced a 4 GB class 4 Kingston micro SD card with MPC5554 using SPI. I have implemented FAT32 file system driver on it.
Everything(reading/writing files) works fine when I keep SPI clock at 3 MHz after initialization. With 3 MHz clock I am able to write 1 MB of data in a file in 1 min which is pretty low speed!!
But when I turn to SPI clock above 3 MHz, the SD card does not read/write sectors at all!! All I want to do is to increase this speed of data transfer.
Has any body done such a thing with speed higher than 3 MHz? I would be so grateful if any body could help me in this issue as I have been trying to solve it since last so many days but no results and my FAT32 driver would be of no use in my application with such a low speed. Please do help me.
Thanks,
Sana
I have interfaced a 4 GB class 4 Kingston micro SD card with MPC5554 using SPI. I have implemented FAT32 file system driver on it.
Everything(reading/writing files) works fine when I keep SPI clock at 3 MHz after initialization. With 3 MHz clock I am able to write 1 MB of data in a file in 1 min which is pretty low speed!!
But when I turn to SPI clock above 3 MHz, the SD card does not read/write sectors at all!! All I want to do is to increase this speed of data transfer.
Has any body done such a thing with speed higher than 3 MHz? I would be so grateful if any body could help me in this issue as I have been trying to solve it since last so many days but no results and my FAT32 driver would be of no use in my application with such a low speed. Please do help me.
Thanks,
Sana
