SD Cards Read/Write routines

Respiflow · Joined: 05 Oct 2007 Posts: 1

I am looking for some CCS code that will enable me to write data to a SD card. Does anyone have some code that will write eg number 1 to 10 to the card and then read them back?

ckielstra · Joined: 18 Mar 2004 Posts: 3680 Location: The Netherlands

If you use the SD card in SPI-bus mode than it is almost identical to an MMC card, only the startup sequence is slightly different.

Please note that for MMC it is much easier to get the specifications than for SD, unless you are willing to pay a lot of money. MMC cards tend to be a little bit cheaper and have more available memory because the DRM hardware is missing.

Guest · Posted: Fri Oct 12, 2007 4:35 am

So are is there any example code out there using the CCS complier with MMC cards?

ckielstra · Joined: 18 Mar 2004 Posts: 3680 Location: The Netherlands

Use the search function of this forum, this topic has been discussed many times.

CCS provides a driver in picc\drivers\mmc_spi.c
The code library section of this forum contains some FAT implementations.