1.8.1.6 Storage

The storage application file:

• Generates the Extended Address (EUI64).
• Manages non-volatile data storage. The G3 stack needs to store in non-volatile memory some counters.

There are some functions that are called from G3 management application:

• APP_STORAGE_GetExtendedAddress(): Returns the generated Extended Address (EUI64)
• APP_STORAGE_GetNonVolatileData(): Returns the non-volatile data, read at initialization
• APP_STORAGE_UpdateNonVolatileData(): Updates the non-volatile data

For PIC32CXMT devices (app_storage_pic32cxmt.c):

• Extended Address (EUI64) is generated using the UniqueID.
• Non-volatile data is stored in User Signature. When non-volatile data is updated (APP_STORAGE_UpdateNonVolatileData() function) it is stored in GPBR (volatile, but faster write access). SUPC power-down detection is used to store non-volatile data in User Signature (non-volatile, but slower write access) just before the power is down (_SUPC_PowerDownCallback() function).

For SAMD20 devices (app_storage_samd20.c):

• Extended Address (EUI64) is generated using the UniqueID
• Non-volatile data is stored in an EEPROM emulation area that SAMD20 Drivers provide