ARMmbed/mbed-ls

mbedls fails to list devices on OS X El Capitan

Patater opened this issue · 5 comments

Patater commented

This is due to the new unified (between iOS and OS X) USB stack. The data returned from ioreg -a -r -n AppleUSBXHCI -l is different on El Capitan. Specifically, ioreg no longer lists the BSD Name of devices.

ciarmcom commented

ARM Internal Ref: IOTSYST-738

PrzemekWirkus commented

Only thing I can do for now is to add documentation entry regarding this issue: #39

flit commented

All the required data is available in the ioreg tool output. This is on El Capitan 10.11.3.

Run ioreg -a -r -c IOUSBHostDevice -l. Walk the tree looking for the CMSIS-DAP IOUSBDevice instance. Once found, examine its children recursively. You should look for children with classes in this order:

  1. IOUSBInterface with bInterfaceClass and bInterfaceSubClass properties matching USB MSC (class==0x8, subclass==0x6)
  2. IOUSBMassStorageInterfaceNub
  3. IOUSBMassStorageDriverNub
  4. IOUSBMassStorageDriver
  5. IOSCSILogicalUnitNub
  6. IOSCSIPeripheralDeviceType00
  7. IOBlockStorageServices
  8. IOBlockStorageDriver
  9. IOMedia. This will actually have an IOObjectClass property value of something like "MBED microcontroller Media", but it's the only child of the IOBlockStorageDriver.

The IOMedia object has the BSD Name property you are looking for.

Or you can just search all children of the matching IOUSBDevice for the BSD Name property.

sg- commented

Seems like this should be fixed given we've got a suggestion on how to fix. Thanks @flit