mbed

Hello John,

I think that mbed is recognized as USB MSD device when inserted to PC. But as I understand, mbed is composite USB device with MSD interface and CDC (serial). I assume that drivers are needed for virtaul serial port interface.

There are two answers:

• You need no drivers on your PC to recognize the mbeds flash memory for programming the device. Just connect a USB cable between the mbed mini USB socket and your PC. Note that you are in fact seeing the so-called magic interface chip and its external flash memory. You only need a driver when you want to use the serial port also.

• You need no drivers on your PC to recognize the mbed LPC1768 as thumbstick memory emulator using the USB device pins D- and D+. Just load and run the appropriate mbed application code for USBMSD. http://mbed.org/handbook/USBMSD

The mbed will be recognised automatically as flash storage like any other USB thumbstick.

I understand the MBED is just plug and play, the thing is, I am trying to plug into a high end Bore Scope to be able to output images through its USB ports, but the Scope doesn't recognize the device. Though it recognizes regular flash/thumb drives fine.

So I am wondering what type of firmware the scope might need to recognize the MBED device.

• Are you using the mbed program flash (mini USB B) or the D-/D+ with USBMSD?
• in case you use USBMSD:
  • Is the mbed powered either by PCs USB, external supply or by the Scopes USB port
  • Is the mbed GND connected to the Scopes USB port GND
  • Is USBMSD working when you plug it into a PC USB port?

Could be a problem related to insufficient memory. How big are the images you try to store.

In that case I would recommend you to use the USB interface available in ports 31 and 32.