[Classic AutoSar] [Storage Stack] (1)
tags: Classic AutoSAR Autosar NvM Storage stack
table of Contents
First, the storage stack consists of
Second, the cause of non-disabled storage data in automotive electronics?
First, the storage stack consists of
- NVRAM Manager-NvM
- Memory Abstraction Interface-MemIf
- EEPROM Abstraction-Ea
- Flash EEPROM Emulation-Fee
- Internal/External EEPROM Driver-Eep
- Internal/External Flash Driver-Fls
- RAM Test
Second, the cause of non-disabled storage data in automotive electronics?
- Non-volatile data can be saved after power-down
- Application Access is a copy of non-volatile data
- Can be copied from non-easy to copy when power-onRAM
- Power-offRAMCopy to non-volatile
- Non-volatile data can be read and written at any time
Third, NVM-effect
- Provide data storage abstraction
- Treatment of power-on and power down data
- Associated non-easy dataROMwithRAMCopy between copies
- Data can be passed to multiple devices
Four, NVM- Overview
- NvMThe module provides storage and maintenance of non-volatile data according to separate needs in a car environment.
- NvMThe module can be managed fromEEPROMorFEENon-volatile data
- NvMThe module provides non-volatile data management and maintenance synchronization and asynchronous service request services, such as: initialization/read/write/control
V. NVM-structure
Sixth, NVM-basic concepts
- NVRAM BlockMinimum unit, eachNVRAM BlockMultipleBasic Storage Objectcomposition.
- OneBasic Storage ObjectCan be located in different storage locations (RAM/ROM/NV memory）
- NVRAM BlockIs a tissue structure of storage management, used to store a pieceNV dataThis module implements management of the organization structure
- Need to be stored in non-volatile storage data
- NVRAM BlockType, dependenceNVRAM BlockSingle composition in different mandatory/Optional basic storage object block, and then processes theseNVRAM Block
- RAM BlockA kind ofBasic Storage Object,YesNVRAM blockPart of theRAMStore
- ROM BlockA kind ofBasic Storage Object,YesNVRAM blockPart of theROMStore. An alternativeNVRAM BlockTime
- NV BlockA kind ofBasic Storage Object,YesNVRAM blockPart of it, located in non-volatile storage. This typeNVRAM BlockOne type of implementation must be supported for modules
- in case"Static Block ID"Enable, includedNV BlockAdditional Information
- Administrative BlockA kind ofBasic Storage Object,YesNVRAM blockPart of theRAMStore. This typeNVRAM BlockIn order to support the type of implementation, it is used to manage various various types in the module.NVRAM BlockState and place
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