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MMC or SD card in SPI mode

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pratish86

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sd card spi mode

hello
I am using C8051f040(cygnal) microcontroller .I successfully read/write data in mmc card using SPI but to increase the speed to download data at PC,
I want to write to and read from a mmc card in FAT so that it can be read by a PC card reader/ mmc card reader using USB. Does any body know where I can get the C libraries or source code to do this to save me time.
 

mmc spi mode

Application note AN282 from Silabs:
The USB Mass Storage and CF/MMC/SD Reference Design Kit includes everything necessary to implement a FAT16 file system using a SD, MMC, or CF memory card on your Silicon Labs MCU. In addition, it provides a method of interfacing that system to a host PC via USB using the Mass Storage Device class
 

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