Today marks some real progress with the Mass Storage code - it’s almost finished. With the latest code I can now format a 16MB flash disk, give it a name and drop very small files onto it (less than 64KB or so each). For some reason folders or any files larger than about 64KB aren’t reading (or writing) correctly, and have the data above the ~64KB mark all repeating garbage. I’ll have to look into that and try to suss out the source of the problem.
My previous problems with the formatting was down to a few mis-calculations in the MODE SENSE command, as well as a few bugs in the READ/WRITE command (one of which was a missing check for the endpoint recieved flag, resulting in writing and reading before the host was ready). Tests show that the host doesn’t seem to use the READ SENSE (10) command at all, so I’ve thrown all that code away in favor of just the MODE SENSE (6) command, which is definitely used and required.
With any luck the example will be finished by Friday, when I get my second semester University exam results.
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