The Bluetooth low energy link layer provides the first level of control and data structure over the raw radio operations and bit stream transmission and reception.
The Linklayer can be implemented in two versions:
Hardware Firmware Oriented
Software Oriented
This variant of the link layer is Software oriented and is defined at a high Level. Most of the baseband functions has been implemented in Software. Customer can easily port this software link layer to their transceiver
Most procedures for the protocols implemented in software
Minimum set of standard functions in hardware
Designed for portability across 32-bit processors
Architecture of firmware for low code and data footprint
Reuse of all firmware components of the existing link layer IP
HCI, Algorithms, Data Structures etc.
complete reuse of OS, MCU and Transport abstraction layers
Hardware abstraction layer to ensure no changes in the core firmware even if h/w changes
Deliverables
HCI/LM/LC/LL firmware source code in C
Transport drivers (UART, USB)
Platform drivers for development platform
OSAL for MINT OS/FreeRTOS
BlueWiz FPGA platform
Flash download utility HCI Commander – HCI application
BlueWiz Architecture document
BlueWiz Verification document
SoC integration approach note
User manuals for development tools
Benefits
Ideal for all mid end applications which need high flexibility.
Most functionality can be added by software update.
Lesser need for new Silicon- s/w upgrades to new specifications
High degree of configurability based on target application
Reuse of components ensures lower product risk
