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Overview

The FORMAT parameter group (specifically FORMAT_VERSION) is an internal system identifier used by AP_Periph (DroneCAN) devices.

Key Concepts

1. Storage Integrity

As DroneCAN peripheral firmware is updated, the way parameters are laid out in the device's internal memory (Flash/EEPROM) may change.

  • Version Check: At boot, the firmware checks the FORMAT_VERSION stored in memory.
  • Wipe: If the stored version does not match the version expected by the firmware, the device will automatically perform a factory reset of all parameters to prevent data corruption.

Parameter Breakdown

  • FORMAT_VERSION: An integer representing the memory layout version.

Developer Notes

  • Warning: Do not modify. Changing this value will cause the device to lose all calibration and configuration data on the next reboot.

FORMAT_VERSION

Default 0

Eeprom format version number (FORMAT_VERSION)

Description

This is an internal system parameter used by the DroneCAN peripheral firmware to track the structure of its parameter storage (EEPROM/Flash). It ensures that if the firmware is updated to a version with a different storage layout, the system can detect the mismatch and perform a factory reset to prevent data corruption.

The Mathematics

Integer version comparison.

The Engineer's View

Defined in Tools/AP_Periph/Parameters.cpp.

Tuning & Behavior

  • Read Only: Do not edit. Modifying this will likely cause a factory reset of all peripheral parameters on the next boot.
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Follow Mode Configuration (FOLL) Frame Configuration (FRAME)