I've built a MSP430F2370 based 15693 RFID tag reader/writer . The main board has a daughter board, shaped as a SD card, which connects to a SD card holder/reader.
We were planning to communicate with a Windows Mobile 6 handheld via SD card interface using SPI. Our software team told us this was technically impossible, or at least would take a couple of months to implement. We got three weeks to finish all of it.
So, the ball returned to me. Now I was asked to emulate a SD card with the MSP. This includes all the SPI communication and FAT16 emulation as well. This has been done before, afak not with a MSP though.
After some search, I was unable to find previous works using MSPs to emulate SD cards. Is there any info/work done about it? Also, I have a handfull of thick SD card specifications PDFs, but I can't seem to find timing diagrams telling what a happy SD card should send to a host. If someone could also please address me to a more concise, good documentation on this, it'd be very nice.