TelemetryFmt Namespace Reference

Functions
void	writeU32Be (std::uint8_t *dst, std::uint32_t v)
	Write a 32-bit value in big-endian order to dst[0..3].
std::uint16_t	hzToPeriod_ms (std::uint16_t frequency_hz)
	Convert frequency (Hz) to period (ms), using integer math.

Variables
constexpr std::size_t	kPacketCapacity_bytes = 120
constexpr std::size_t	kSyncZeroCount_bytes = 3
constexpr std::size_t	kBytesInU32_bytes = 4
constexpr std::size_t	kStartByteIndex = kSyncZeroCount_bytes
constexpr std::size_t	kTimestampIndex = kStartByteIndex + 1
constexpr std::size_t	kPacketCounterIndex = kTimestampIndex + kBytesInU32_bytes
constexpr std::size_t	kHeaderSize_bytes = kSyncZeroCount_bytes + 1 + kBytesInU32_bytes + kBytesInU32_bytes
constexpr std::size_t	kEndMarkerSize_bytes = kSyncZeroCount_bytes + 1
constexpr std::uint8_t	kStartByteValue = 51
constexpr std::uint8_t	kEndByteValue = 52
constexpr unsigned	kBitsPerByte_bits = 8
constexpr std::uint32_t	kCommandModeInactivityTimeout_ms = 10000
constexpr std::size_t	kCommandEntrySequenceLength = 3
constexpr char	kCommandEntryChar = 'c'

Function Documentation

hzToPeriod_ms()

std::uint16_t TelemetryFmt::hzToPeriod_ms ( std::uint16_t frequency_hz )

inline

Convert frequency (Hz) to period (ms), using integer math.

Uses ceil(1000 / Hz). If Hz == 0, returns 1000ms as a safe fallback.

Definition at line 82 of file Telemetry.h.

writeU32Be()

void TelemetryFmt::writeU32Be ( std::uint8_t * dst, std::uint32_t v )

inline

Write a 32-bit value in big-endian order to dst[0..3].

Assumptions used by float packing.

Definition at line 68 of file Telemetry.h.

Variable Documentation

kBitsPerByte_bits

unsigned TelemetryFmt::kBitsPerByte_bits = 8

constexpr

32-bit helper constants

Definition at line 56 of file Telemetry.h.

kBytesInU32_bytes

std::size_t TelemetryFmt::kBytesInU32_bytes = 4

constexpr

Number of bytes in a packed 32-bit value.

Definition at line 38 of file Telemetry.h.

kCommandEntryChar

char TelemetryFmt::kCommandEntryChar = 'c'

constexpr

Definition at line 59 of file Telemetry.h.

kCommandEntrySequenceLength

std::size_t TelemetryFmt::kCommandEntrySequenceLength = 3

constexpr

Definition at line 58 of file Telemetry.h.

kCommandModeInactivityTimeout_ms

std::uint32_t TelemetryFmt::kCommandModeInactivityTimeout_ms = 10000

constexpr

Definition at line 57 of file Telemetry.h.

kEndByteValue

std::uint8_t TelemetryFmt::kEndByteValue = 52

constexpr

End-of-packet marker byte value.

Definition at line 53 of file Telemetry.h.

kEndMarkerSize_bytes

std::size_t TelemetryFmt::kEndMarkerSize_bytes = kSyncZeroCount_bytes + 1

constexpr

End marker layout: 3 zeros followed by an end byte.

Definition at line 47 of file Telemetry.h.

kHeaderSize_bytes

std::size_t TelemetryFmt::kHeaderSize_bytes = kSyncZeroCount_bytes + 1 + kBytesInU32_bytes + kBytesInU32_bytes

constexpr

Definition at line 44 of file Telemetry.h.

kPacketCapacity_bytes

std::size_t TelemetryFmt::kPacketCapacity_bytes = 120

constexpr

Maximum packet size (bytes). Must match your radio/modem configuration.

Definition at line 32 of file Telemetry.h.

kPacketCounterIndex

std::size_t TelemetryFmt::kPacketCounterIndex = kTimestampIndex + kBytesInU32_bytes

constexpr

Definition at line 43 of file Telemetry.h.

kStartByteIndex

std::size_t TelemetryFmt::kStartByteIndex = kSyncZeroCount_bytes

constexpr

Header layout: [0..2]=0, [3]=START, [4..7]=timestamp (big-endian).

Definition at line 41 of file Telemetry.h.

kStartByteValue

std::uint8_t TelemetryFmt::kStartByteValue = 51

constexpr

Start-of-packet marker byte value.

Definition at line 50 of file Telemetry.h.

kSyncZeroCount_bytes

std::size_t TelemetryFmt::kSyncZeroCount_bytes = 3

constexpr

Header markers: 3 sync zeros followed by a start byte.

Definition at line 35 of file Telemetry.h.

kTimestampIndex

std::size_t TelemetryFmt::kTimestampIndex = kStartByteIndex + 1

constexpr

Definition at line 42 of file Telemetry.h.