I have a need to write small amounts of data to an SD card. The data comes in discontinuous flurries of 4 byte chunks and I have about 7mS between chunks to write the 4 bytes to SD (and hopefully to RS232). A normal incident will have a total of 200-532 bytes but there may be incidents that have thousands of bytes.
The examples I've found so far write 512 bytes at a time, using FRAM or RAM to accumulate a page prior to writing. I'd prefer to write each 4 byte chunk as it occurs.
Is it possible to write smaller amounts than 512 bytes? Does anyone have a URL to an explanation of reading/writing to SD? Better yet, does anyone have an example of writing small amounts of data to SD?
Bookmarks