This is a simple Go wrapper for the libairspy library.
Airspy is a suite of low-cost, high-performance Software Defined Radios (SDR).
$ brew install airspy # homebrew on mac, else install libairspy as appropriate for your OS
$ go get -u github.com/fogleman/go-airspy/airspyhttps://godoc.org/github.com/fogleman/go-airspy/airspy
func main() {
// print the libairspy library version, e.g.
// "1.0.9"
fmt.Println(airspy.LibVersion())
// open the airspy device
device, err := airspy.Open()
check(err)
// print the device version, e.g.
// "AirSpy NOS v1.0.0-rc10-3-g7120e77 2018-04-28"
version, err := device.VersionString()
check(err)
fmt.Println(version)
// set some parameters
check(device.SetSampleType(airspy.SampleFloat32IQ))
check(device.SetSampleRate(10000000))
check(device.SetFrequency(98700000))
check(device.SetLNAGain(11))
check(device.SetMixerGain(7))
check(device.SetVGAGain(7))
// create a channel to receive transfers
transfers := make(chan airspy.Transfer, 16)
// kick off a goroutine to process the samples (see below)
go handler(transfers)
// star
5A66
t sampling
check(device.StartRx(transfers))
// wait a bit
time.Sleep(100 * time.Millisecond)
// stop sampling
check(device.StopRx())
// close the device
check(device.Close())
}
func handler(transfers chan airspy.Transfer) {
// process samples
var maxMagnitude float64
for transfer := range transfers {
samples := transfer.Samples.([]float32)
fmt.Println(len(samples), "samples")
for i := 0; i < len(samples); i += 2 {
I := float64(samples[i])
Q := float64(samples[i+1])
x := complex(I, Q)
m := cmplx.Abs(x)
if m > maxMagnitude {
maxMagnitude = m
fmt.Println(maxMagnitude)
}
}
}
}
func check(err error) {
if err != nil {
log.Fatal(err)
}
}