Logical host interfaces
On top of the physical host interfaces and transport layers, the SpringCore devices support a wide variety of communication protocols or Logical host interfaces.
The primary Logical host interface protocol is selected by configuration the Profile configuration register.
Host protocol implementation matrix
Some of the Logical interfaces are not available on every Physical and Transport interfaces for technical reasons, or because they make no senses on all communication medium. The table below summarizes the implementation matrix.
|Direct Protocol||Yes||Yes||TCP Server
|CCID Protocol (PC/SC)||Yes||Yes||TCP Server
|HID Protocol (RFID Scanner)||Yes||Yes||No||No|
|$SCRDR Protocol||Over CDC||No||TCP Server
|SpringProx Legacy Protocol||Over CDC||No||No||Yes|
Secondary host protocol
The Profile configuration register specifies the overall behavior of the SpringCore device, and therefore its primary Logical host interface protocol, but the physical host interface and transport layer may allow a second Logical host interface to be used in the same time.
- For USB, the SpringCore device exposes a compound device profile. Whatever the primary Logical protocol, the Direct Protocol remains available as the secondary USB interface, unless this feature is disabled in the USB options configuration register,
- For BLE, the SpringCore device exposes a GATT with more than one service. The Direct Protocol is exposed as a secondary service in the GATT, unless this feature is disabled in the BLE options configuration register.