Lpc2000

--- In lpc2000@yahoogroups.com, "wildmojo2003" <jhlebasko@i...> 
wrote:
> I'm looking to use SD card in a datalogging application. I am 
trying
> to research how much code space will be needed to support the SD 
card.
> I want to be able to read the data off of the card with a normal 
card
> reader. Anyone has experience with this?

It is definitely possible using SPI mode.  Not all MMC cards 
implement SPI mode, but most do -- I only have one card that doesn't.

In my application I read bits out of file on a FAT-formatted card in 
order to program an FPGA.  The fpga bits are written to the card 
using XP and a dongle.   My LPC2106 board also writes bits into 
files on the card, which can later be read using XP.

Here's the size for the bulk of the code:

ch@laptop-vmware:~/src/rc2106$ size mmc.o spi.o fat.o crc.o
   text    data     bss     dec     hex filename
   4624     192       0    4816    12d0 mmc.o
    496       0       0     496     1f0 spi.o
   4144       4     512    4660    1234 fat.o
    192       0       0     192      c0 crc.o
ch@laptop-vmware:~/src/rc2106$

I can't share the code unfortunately at the moment.  Perhaps in the 
future.

Cheers,
-ch