CSR Firmware.pdfVIP

CSR Firmware Firmware Categories ? Several variants of the BlueCore firmware are available. ? These target different application areas and market segments. ? All the variants are produced from the same source code tree. Firmware Categories - HCI Build ? The traditional architecture splits functionality between the Bluetooth module and a host at the HCI level. ? This offers the most hardware flexibility. ? A separate microprocessor is required to implement th “hi h l ” HCI Upper Layer Driver L2CAP SDP RFCOMM TCS-BIN Adapted Protocols (TCP/IP, WAP) Application Code and User Interface Bluetooth Radio Bluetooth Baseband (Link Controller) Link Manager (LM) HCI Lower Layer Driver H o s t H a r d w a r e B l u e t o o t h M o d u l e Firmware Categories - RFCOMM Build ? Additional layers of the Bluetooth protocol stack can be run on the BlueCore. ? This removes some processing load from host. ? The maximum data throughput may be reduced. Adapted Protocols (TCP/IP, WAP) Application Code and User Interface Bluetooth Radio Bluetooth Baseband (Link Controller) Link Manager (LM) HCI Layer (optional) H o s t H a r d w a r e B l u e t o o t h M o d u l e L2CAP SDP RFCOMM Firmware Categories - RFCOMM Build ? The BlueCore firmware incorporates a virtual machine (VM). ? The complete application can run on the BlueCore, without requiring an external host processor. ? Suitable for small applications such as mobile phone headsets and audio gateways. ? The VM is also present in HCI-only builds. Bluetooth Radio Bluetooth Baseband(Link Controller) Link Manager (LM) HCI Layer (optional) Host Hardware (optional) B l u e t o o t h M o d u l e L2CAP SDP RFCOMM Adapted Protocols (TCP/IP, WAP) Application Code and User Interface Firmware Categories - Application Specific ? Special build variants are produced for some applications, where the VM does not provide sufficient flexibility or performance: – HID (mouse etc.) – HID proxy (presents a USB HID interface