SD USB MSD helloworld

Dependencies:   USBFileSystem USBSDFileSystem mbed

Created based on comment from Erik Olieman see https://mbed.org/questions/1181/combine-SDfilesystem-with-USBMSD_SD/?c=7180

As well as based on SDFileSystem library for the spi-access to SD-card.

It gives the next output:

Hello World!

now a USB drive should appear on your PC
create directory and append to log file
appending: '[0]Hello fun SD Card World!'
Entering loop of 1 min cycle time
appending: '[1]Hello fun SD Card World!'
appending: '[2]Hello fun SD Card World!'
...

This works.

Although, I've to admit it is not very convenient, since my win7 pc always disconnect/connect the drive and at disconnect it also closes the explorer which show the content of that drive. It does the same with the editor that has the file opened.

unknown revision 'shortlog'