Recently I purchased a Class 10 SD Card from a major retailer. I was very excited – now I have a fast card for testing. Here’s my new baby:

Note the 10 in the part-circle indicating the speed. For those who don’t know, the “class” speed system for SD cards is very simple. It’s the write [...]

The STM32F2xx has a great SD Card interface. It’s a true 4-bit parallel interface, and in general it works pretty well. I have come across a few, fairly minor but still significant, considerations when using the interface that I thought I’d pass on.
Initialisation Sequence
Proper initialization of the SD card is important, because SD cards have [...]