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Use Cases

Three general "Use Cases" are defined when using a netX hardware and must be handled by the maintenance firmware:

  • Case A: netX90 minimal - iFLash INT FLASH only / INTRAM only
  • Case B: netX90 - iFLASH INT FLASH / INTRAM + SQI Flash (for APP CPU / MFW)
  • Case C: netX90 / netX4000 + SQI Flash + SDRAM

Supported Drivers

The following drivers are used by the maintenance firmware for the different use cases.

DrivernetX90netX4000Description

ABCC
INT FLASH(tick)(tick)(tick)(error)For access to
IntFlash0
INT FLASH 0-1 for the COM CPU and
IntFlash2
INT FLASH 2 for APP CPU updates.
SPI(tick)(tick)(tick)(tick)For access to the external SPI flash.
SPI FLASH(tick)(tick)(tick)(tick)For access to the external SPI flash.
Serial(tick)(tick)(tick)(error)Communication with maintenance firmware (downloading/starting update).
USB(error)(error)(error)(tick)Communication with maintenance firmware (downloading/starting update).
DPM(tick)(tick)(tick)(tick)Communication with maintenance firmware (downloading/starting update
).

Once the following issue is resolved, the SPI and SPI FLASH drivers in use case A and use case B can be removed, too.

Additional Services

In addition to the drivers, rhe maintenance firmware must also provide standard services necessary for external apllications.

  • Flash device Label
    Device specific infomation, including firmware update areas or file system information

  • Device Data Provider (DDP)
    The DDP is used to retrieve information like hardware compatibility or locations of FLASH areas from the FDL.

  • Marshaller (Diagnostics interface)
    For the communication between Host and netX the Marshaller is used in the following configuration.

    • Middleware packet handling
    For file related packet handling it has to be distinguished between FLASH and filesystem area and between (regular) loadable firmware (LFW) and the maintenance firmware (MFW
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