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• HAL APIs will be available in the CMF repo path: "../rdkb/components/opensource/ccsp/hal/source/"
• PandM HAL Integration (back-end) Layer is also known as component specific HAL.
• This layer makes call to underlying Linux system calls/commands, third party modules, open source modules and other CCSP components to execute the requests.
• This layer will be more component specific and will be providing APIs to CCSP so as to manage a particular hardware module of the system.
• Following are some of the  component specific  HALs available in "../rdkb/components/opensource/ccsp/hal/source/" path.
  
  • Wifi  
  • MoCA
  • MTA Agent
  • CM   
  • Ethernet Switch
  • DHCPv4C
  • VLAN
  • Firewall
  • DPoE
  • BluetoothEthernet Switch
  • MSO_Management
  • Voice
  • WAN

Wi-Fi HAL 

       All HAL functions prototypes and structure definitions are available in wifi_hal.h file.

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All HAL functions prototypes and structure definitions are available in Tr69_Tlv.h file.

• Telemetry Key fields and data fields are stored in the database as TLV (Tag, Length, Value)

1. Tag - uniquely identifies the field.
2. Length - gives the size (in number of bytes) of the data associated with the field.
3. Value - contains the actual data associated with the field stored in network byte ordering.

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1.  platform_hal_GetSerialNumber
2.  platform_hal_GetFirmwareName
3.  platform_hal_GetBootloaderVersion

• To see the API specification of PlatformHAL please refer - https://rdkwiki.com/doxygen/rdkb/db/de9/group___p_l_a_t_f_o_r_m___h_a_l___a_p_i_s.html