Module config 

Parser for .d75 configuration files.

These files contain the complete radio configuration and can be saved (Menu No. 800) and loaded (Menu No. 810) from the microSD card. The data format is the same as the MCP-D75 PC application uses.

Per Operating Tips §5.14.3: it is recommended to export and save the configuration before performing a firmware upgrade, as the upgrade process may reset settings.

The file format is a 256-byte header followed by a raw memory image identical to what the MCP programming protocol reads.

File Layout

Offset	Size	Content
0x000	0x100	File header (model ID, metadata)
0x100	…	MCP memory image (settings, channels, names, etc.)

Channel data lives at .d75 offset 0x100 + MCP offset. The exact section layout is inferred from D74 development notes and adapted for the D75’s expanded feature set.

Structs

ChannelEntry

A single memory channel combining frequency data, display name, and flags.

ConfigHeader

Parsed .d75 configuration file header (256 bytes).

RadioConfig

Complete radio configuration from a .d75 file.

Constants

HEADER_SIZE

Size of the .d75 file header in bytes.

MAX_CHANNELS

Maximum number of memory channels on the TH-D75.

Functions

empty_channel

Creates an empty ChannelEntry for the given channel number.

make_channel

Creates a ChannelEntry with the given flash channel data.

make_header

Creates a minimal valid .d75 header for the given model string.

parse_config

Parses a .d75 configuration file from raw bytes.

write_config

Generates a .d75 file from a RadioConfig.

write_d75

Write a .d75 configuration file from a raw memory image and header.