Struct DstarAccess 

pub struct DstarAccess<'a> { /* private fields */ }

Read-only access to the D-STAR configuration region.

Provides raw byte access and typed field accessors for D-STAR settings stored in the system settings area (channel info at 0x03F0) and the repeater/callsign list starting at page 0x02A1.

Known sub-regions

MCP Offset	Content
0x003F0	D-STAR channel info (16 bytes)
0x01300	MY callsign (8 bytes) + suffix (4 bytes)
0x2A100	Repeater list (108-byte records)
varies	Callsign list (8-byte entries, up to 120)

Implementations

impl<'a> DstarAccess<'a>

pub fn channel_info(&self) -> Option<&[u8]>

Get the D-STAR channel info bytes (16 bytes at offset 0x03F0).

Contains the active D-STAR slot configuration.

pub fn repeater_callsign_region(&self) -> Option<&[u8]>

Get the raw repeater/callsign list region.

This region spans from page 0x02A1 to page 0x04D0 (before the Bluetooth data). It contains both the repeater list and the callsign list.

pub const fn region_size(&self) -> usize

Get the total size of the D-STAR repeater/callsign region in bytes.

pub fn repeater_record(&self, index: usize) -> Option<&[u8]>

Read a repeater record by index (raw 108 bytes).

Each record is 108 bytes. Returns None if the index is out of bounds or the record extends past the region.

pub fn read_bytes(&self, offset: usize, len: usize) -> Option<&[u8]>

Read an arbitrary byte range from the D-STAR region.

The offset is an absolute MCP byte address. Returns None if the range extends past the image.

pub fn my_callsign(&self) -> String

Read the D-STAR MY callsign (up to 8 characters, space-padded).

Offset

Located at 0x1300 (confirmed from D74 development notes as the callsign data region). The first 8 bytes are the MY callsign.

Verification

Field boundary is estimated, not hardware-verified within the callsign data region.

pub fn my_callsign_typed(&self) -> Option<DstarCallsign>

Read the D-STAR MY callsign as a typed DstarCallsign.

Returns None if the callsign is empty or invalid.

Offset

Located at 0x1300.

Verification

Offset is estimated, not hardware-verified.

pub fn repeater_entry(&self, index: u16) -> Option<RepeaterEntry>

Read a repeater entry by index, parsed into a RepeaterEntry.

Returns None if the index is out of range, the record is all-0xFF (empty), or the record cannot be parsed.

Offset

Repeater records start at 0x2A100 (page 0x02A1), each 108 bytes. Record N is at offset 0x2A100 + N * 108.

Verification

Region boundary confirmed. Internal field layout from firmware RE offset is estimated, not hardware-verified.

pub fn repeater_count(&self) -> u16

Count the number of non-empty repeater entries.

Iterates through the repeater list region and counts entries that are not all-0xFF or all-0x00.

Trait Implementations

impl<'a> Debug for DstarAccess<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.