Siemens HC15 Bedienungsanleitung PDF herunterladen (Seite 3)

AN39: USB Interface Description

Contents

HC15_USB_Interface_v02 Page 3 of 28 2007-04-05

Confidential / Preliminary

Contents

0 Document History ...................................................................................................... 5

1 Introduction ................................................................................................................. 6

1.1 Related Documents ........................................................................................... 6

1.2 Abbreviations ..................................................................................................... 6

2 Overview ......................................................................................................................7

3 USB Interface Functionality ....................................................................................... 8

3.1 Start Up.............................................................................................................. 9

3.2 Composite Device Interfaces for "MdmNet" Enumeration ............................... 10

3.2.1 Interface 0 (VCOM Port) ..................................................................... 10

3.2.2 Interface 1 (NET Port)......................................................................... 10

3.2.3 Interface 2 (MODEM Port) .................................................................. 10

3.3 Composite Device Interfaces for "Mdm" Enumeration..................................... 11

3.3.1 Interfaces 0 and 1 (CDC ACM MODEM Port)..................................... 11

3.3.1.1 Interface 0 (CDC ACM – Control) ....................................... 11

3.3.1.2 Interface 1 (CDC ACM – Data)............................................ 11

3.3.2 Interface 2 (VCOM1 Port) ................................................................... 11

3.3.3 USB Interface 3 (VCOM2 Port)........................................................... 11

3.3.4 Usage of Non-Windows USB Host Drivers......................................... 12

3.4 Transition from Composite to Mass Storage Device........................................ 13

3.4.1 Transition Timer.................................................................................. 13

4 USB Interface Descriptors........................................................................................ 14

4.1 Composite Device Enumeration “MdmNet“ Variant......................................... 14

4.1.1 Device Descriptor................................................................................ 14

4.1.2 Configuration Descriptor ..................................................................... 15

4.1.2.1 Configuration....................................................................... 15

4.1.2.2 Interface 0 (VCOM Port) ..................................................... 15

4.1.2.3 Interface 1 (NET Port)......................................................... 17

4.1.2.4 Interface 2 (MODEM Port) .................................................. 19

4.1.3 String Descriptor ................................................................................. 21

4.1.3.1 String 0 - Language IDs ...................................................... 21

4.1.3.2 String 1 - iManufacturer....................................................... 21

4.1.3.3 String 2 - iProduct................................................................ 21

4.1.3.4 String 3 - iInterface .............................................................. 21

4.1.3.5 String 4 - iInterface .............................................................. 22

4.1.3.6 String 5 - iInterface .............................................................. 22

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