TelemetryFmt Namespace Reference

Functions
void	write_u32_be (std::uint8_t *dst, std::uint32_t v)
	Write a 32-bit value in big-endian order to dst[0..3].
std::uint16_t	hz_to_period_ms (std::uint16_t hz)
	Convert frequency (Hz) to period (ms), using integer math.

Variables
constexpr std::size_t	kPacketCapacity = 120
constexpr std::size_t	kSyncZeros = 3
constexpr std::size_t	kU32Bytes = 4
constexpr std::size_t	kStartByteIndex = kSyncZeros
constexpr std::size_t	kTimestampIndex = kStartByteIndex + 1
constexpr std::size_t	kPacketCounterIndex = kTimestampIndex + kU32Bytes
constexpr std::size_t	kHeaderBytes = kSyncZeros + 1 + kU32Bytes + kU32Bytes
constexpr std::size_t	kEndMarkerBytes = kSyncZeros + 1
constexpr std::uint8_t	kStartByteValue = 51
constexpr std::uint8_t	kEndByteValue = 52
constexpr std::size_t	kBytesIn32Bit = 4
constexpr unsigned	kBitsPerByte = 8
constexpr std::uint8_t	kAllOnesByte = 0xFF

Function Documentation

hz_to_period_ms()

std::uint16_t TelemetryFmt::hz_to_period_ms ( std::uint16_t 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 80 of file Telemetry.h.

write_u32_be()

void TelemetryFmt::write_u32_be ( 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 66 of file Telemetry.h.

Variable Documentation

kAllOnesByte

std::uint8_t TelemetryFmt::kAllOnesByte = 0xFF

constexpr

Definition at line 57 of file Telemetry.h.

kBitsPerByte

unsigned TelemetryFmt::kBitsPerByte = 8

constexpr

Definition at line 56 of file Telemetry.h.

kBytesIn32Bit

std::size_t TelemetryFmt::kBytesIn32Bit = 4

constexpr

32-bit helper constants

Definition at line 55 of file Telemetry.h.

kEndByteValue

std::uint8_t TelemetryFmt::kEndByteValue = 52

constexpr

End-of-packet marker byte value.

Definition at line 52 of file Telemetry.h.

kEndMarkerBytes

std::size_t TelemetryFmt::kEndMarkerBytes = kSyncZeros + 1

constexpr

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

Definition at line 46 of file Telemetry.h.

kHeaderBytes

std::size_t TelemetryFmt::kHeaderBytes = kSyncZeros + 1 + kU32Bytes + kU32Bytes

constexpr

Definition at line 43 of file Telemetry.h.

kPacketCapacity

std::size_t TelemetryFmt::kPacketCapacity = 120

constexpr

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

Definition at line 31 of file Telemetry.h.

kPacketCounterIndex

std::size_t TelemetryFmt::kPacketCounterIndex = kTimestampIndex + kU32Bytes

constexpr

Definition at line 42 of file Telemetry.h.

kStartByteIndex

std::size_t TelemetryFmt::kStartByteIndex = kSyncZeros

constexpr

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

Definition at line 40 of file Telemetry.h.

kStartByteValue

std::uint8_t TelemetryFmt::kStartByteValue = 51

constexpr

Start-of-packet marker byte value.

Definition at line 49 of file Telemetry.h.

kSyncZeros

std::size_t TelemetryFmt::kSyncZeros = 3

constexpr

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

Definition at line 34 of file Telemetry.h.

kTimestampIndex

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

constexpr

Definition at line 41 of file Telemetry.h.

kU32Bytes

std::size_t TelemetryFmt::kU32Bytes = 4

constexpr

Number of bytes in a packed 32-bit value.

Definition at line 37 of file Telemetry.h.