radio

package
v0.0.0-...-065a330 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Nov 23, 2020 License: AGPL-3.0 Imports: 19 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var ErrBadSampleRate = errors.New("bad sample rate")
View Source 
var ErrFrequencyOutOfRange = errors.New("frequency out of range")
View Source 
var ErrRateOutOfRange = errors.New("sample rate out of range")

Functions

func Calibrate 

func Calibrate(s SDR) error

func FindPPM 

func FindPPM(sdr SDR) (float64, error)

Types

type Bands 

type Bands []FreqBand

func (Bands) Len 

func (a Bands) Len() int

func (Bands) Less 

func (a Bands) Less(i, j int) bool

func (Bands) Swap 

func (a Bands) Swap(i, j int)

type DongleInfo 

type DongleInfo struct {
	Magic     [4]byte
	Tuner     uint32
	GainCount uint32 // Useful for setting gain by index
}

DongleInfo is data pulled from the RTLTCPSDR on connection.

func (DongleInfo) Valid 

func (d DongleInfo) Valid() bool

Valid checks the received magic number matches the expected byte string 'RTL0'.

type FreqBand 

type FreqBand struct {
	Center float64
	Width  float64
}

TODO: replace with HzBand

func BandMerge 

func BandMerge(fbs []FreqBand) (ret []FreqBand)

func BandRange 

func BandRange(fb []FreqBand) FreqBand

func NewFreqRange 

func NewFreqRange(loMHz, hiMHz float64) FreqBand

func Scan 

func Scan(sdr SDR, cfg ScanConfig) (ret []FreqBand)

func ScanIQReader 

func ScanIQReader(iqr *MixerIQReader, minWidthHz float64) (ret []FreqBand, err error)

func (FreqBand) BandwidthKHz 

func (f FreqBand) BandwidthKHz() float64

func (FreqBand) BeginMHz 

func (f FreqBand) BeginMHz() float64

func (FreqBand) EndMHz 

func (f FreqBand) EndMHz() float64

func (FreqBand) Overlaps 

func (fb1 FreqBand) Overlaps(fb2 FreqBand) bool

func (FreqBand) ToHzBand 

func (f FreqBand) ToHzBand() HzBand

type HzBand 

type HzBand struct {
	Center uint64 `json:"center_hz"`
	Width  uint64 `json:"width_hz"`
}

func HzBandRange 

func HzBandRange(lo, hi int64) HzBand

func (HzBand) Overlaps 

func (hzb HzBand) Overlaps(hz2 HzBand) bool

func (HzBand) ToMHz 

func (hzb HzBand) ToMHz() FreqBand

type IQReader 

type IQReader struct {
	// contains filtered or unexported fields
}

func NewIQReader 

func NewIQReader(r io.Reader) *IQReader

NewIQReader takes a reader that uses u8 I/Q samples.

func (*IQReader) Batch64 

func (iq *IQReader) Batch64(batch, limit int) <-chan []complex64

func (*IQReader) BatchStream64 

func (iq *IQReader) BatchStream64(ctx context.Context, batch, limit int) <-chan []complex64

func (*IQReader) ToMixer 

func (iqr *IQReader) ToMixer(hzb HzBand) *MixerIQReader

type IQWriter 

type IQWriter struct {
	// contains filtered or unexported fields
}

func NewIQWriter 

func NewIQWriter(w io.Writer) *IQWriter

func (*IQWriter) Write64 

func (iq *IQWriter) Write64(out []complex64) error

type MixerIQReader 

type MixerIQReader struct {
	HzBand
	*IQReader
}

func NewMixerIQReader 

func NewMixerIQReader(r io.Reader, hzb HzBand) *MixerIQReader

type RTLTCPSDR 

type RTLTCPSDR struct {
	*net.TCPConn
	Info DongleInfo
}

RTLTCPSDR contains dongle information and an embedded tcp connection to the spectrum server.

func (*RTLTCPSDR) Connect 

func (sdr *RTLTCPSDR) Connect(addr *net.TCPAddr) (err error)

Give an address of the form "127.0.0.1:1234" connects to the spectrum server at the given address or returns an error. The user is responsible for closing this connection. If addr is nil, use "127.0.0.1:1234" or command line flag value.

func (*RTLTCPSDR) SetAGCMode 

func (sdr *RTLTCPSDR) SetAGCMode(state bool) error

Set RTL AGC mode, true for enabled.

func (*RTLTCPSDR) SetCenterFreq 

func (sdr *RTLTCPSDR) SetCenterFreq(freq uint32) error

Set the center frequency in Hz.

func (*RTLTCPSDR) SetDirectSampling 

func (sdr *RTLTCPSDR) SetDirectSampling(state uint32) error

Set direct sampling mode. 0 = disabled, 1 = i-branch, 2 = q-branch, 3 = direct mod.

func (*RTLTCPSDR) SetFreqCorrection 

func (sdr *RTLTCPSDR) SetFreqCorrection(ppm uint32) error

Set frequency correction in ppm.

func (*RTLTCPSDR) SetGain 

func (sdr *RTLTCPSDR) SetGain(gain uint32) error

Set gain in tenths of dB. (197 => 19.7dB)

func (*RTLTCPSDR) SetGainByIndex 

func (sdr *RTLTCPSDR) SetGainByIndex(idx uint32) error

Set gain by index, must be <= DongleInfo.GainCount

func (*RTLTCPSDR) SetGainMode 

func (sdr *RTLTCPSDR) SetGainMode(state bool) error

Set the Tuner AGC, true to enable.

func (*RTLTCPSDR) SetOffsetTuning 

func (sdr *RTLTCPSDR) SetOffsetTuning(state bool) error

Set offset tuning, true for enabled.

func (*RTLTCPSDR) SetRTLXtalFreq 

func (sdr *RTLTCPSDR) SetRTLXtalFreq(freq uint32) error

Set RTL xtal frequency.

func (*RTLTCPSDR) SetSampleRate 

func (sdr *RTLTCPSDR) SetSampleRate(rate uint32) error

Set the sample rate in Hz.

func (*RTLTCPSDR) SetTestMode 

func (sdr *RTLTCPSDR) SetTestMode(state bool) error

Set test mode, true for enabled.

func (*RTLTCPSDR) SetTunerIfGain 

func (sdr *RTLTCPSDR) SetTunerIfGain(stage, gain uint16) error

Set tuner intermediate frequency stage and gain.

func (*RTLTCPSDR) SetTunerXtalFreq 

func (sdr *RTLTCPSDR) SetTunerXtalFreq(freq uint32) error

Set tuner xtal frequency.

type SDR 

type SDR interface {
	SetBand(b HzBand) error
	SetFreqCorrection(ppm uint32) error
	Info() SDRHWInfo
	Close() error
	Reader() *MixerIQReader
}

func NewSDR 

func NewSDR(ctx context.Context) (SDR, error)

func NewSDRWithSerial 

func NewSDRWithSerial(ctx context.Context, ser string) (SDR, error)

type SDRFormat 

type SDRFormat struct {
	BitDepth   uint   `json:"bit_depth"`
	CenterHz   uint64 `json:"center_hz"`
	SampleRate uint32 `json:"sample_rate"`
}

func (*SDRFormat) HzBand 

func (s *SDRFormat) HzBand() HzBand

type SDRHWInfo 

type SDRHWInfo struct {
	Id string `json:"id"`

	MinHz         uint64 `json:"min_hz"`
	MaxHz         uint64 `json:"max_hz"`
	MinSampleRate uint32 `json:"min_sample_rate"`
	MaxSampleRate uint32 `json:"max_sample_rate"`

	SDRFormat
}

func SDRList 

func SDRList(ctx context.Context) ([]SDRHWInfo, error)

type ScanConfig 

type ScanConfig struct {
	CenterMHz   float64
	MinWidthMHz float64
}

type SpectralPower 

type SpectralPower struct {
	// contains filtered or unexported fields
}

func NewSpectralPower 

func NewSpectralPower(band FreqBand, bins, ffts int) *SpectralPower

func (*SpectralPower) Average 

func (sp *SpectralPower) Average() []float64

func (*SpectralPower) BandPower 

func (sp *SpectralPower) BandPower(fb FreqBand, samps int) float64

func (*SpectralPower) Bands 

func (sp *SpectralPower) Bands() (ret []FreqBand)

func (*SpectralPower) Measure 

func (sp *SpectralPower) Measure(ch <-chan []complex64) error

func (*SpectralPower) NoiseFloor 

func (sp *SpectralPower) NoiseFloor() float64

func (*SpectralPower) Spread 

func (sp *SpectralPower) Spread() float64

func (*SpectralPower) Spurs 

func (sp *SpectralPower) Spurs() (ret []FreqBand)

func (*SpectralPower) Stddev 

func (sp *SpectralPower) Stddev() float64

Source Files

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