RtlSdrIQ: read samples from device. Using command line arguments

1 files changed, 62 insertions, 0 deletions

diff --git a/Radio/Utils/RtlSdrIQ/main.swift b/Radio/Utils/RtlSdrIQ/main.swift
new file mode 100644
index 0000000..20573a9
--- /dev/null
+++ b/Radio/Utils/RtlSdrIQ/main.swift
@@ -0,0 +1,62 @@
+//
+//  main.swift
+//  RtlSdrIQ
+//
+//  Created by Jacky Jack on 27/11/2024.
+//
+
+import Foundation
+import libr820
+import ArgumentParser
+
+//set the command line arguments
+struct CommandLineArgs: ParsableCommand {
+    @Argument var file:String = ""
+    @Option(name:.shortAndLong) var device_idx: Int = 0
+    @Option(name:.shortAndLong) var samplerate: Int = 2048000
+    @Option(name:.shortAndLong) var gain: Int = 0
+    @Option(name: .shortAndLong) var frequency: Int = 100000000
+    @Option(name:.shortAndLong) var nsamples: Int = 1024
+    @Flag(name: .shortAndLong) var verbose: Bool = false
+    @Flag(name: .shortAndLong) var async: Bool = false
+}
+
+let args = CommandLineArgs.parseOrExit()
+
+//check that there is any devices
+let count = getDeviceCount()
+if count < 1 {
+    print("There is not R820 tunner found on this machine")
+    exit(0)
+}
+
+//check that argument index is withing range
+if (args.device_idx < 0) || (args.device_idx > count-1) {
+    print("Index is out of range, devices found \(count)")
+    exit(0)
+}
+
+//initialise structure without a connected driver
+let device = R820Tuner()
+device.open(index: UInt32(args.device_idx))
+
+let _ = device.setSampleRate(samplerate: UInt32(args.samplerate))
+let _ = device.setCenterFreq(freq: UInt32(args.frequency))
+if args.gain == 0 {
+    let _ = device.setAgcMode(on: 1)
+} else {
+    let _ = device.setTunerGain(gain: Int32(args.gain))
+}
+let _ = device.resetBuffer()
+let buf_ptr = UnsafeMutableRawPointer.allocate(byteCount: args.nsamples, alignment: 1)
+var nbytes:Int32 = 0
+let r = device.readSync(buf: buf_ptr, len: Int32(args.nsamples), n_read: &nbytes)
+print("Reading samples return code (\(r)) read \(nbytes) bytes\n")
+for i in 0..<args.nsamples {
+    let offsetByte = buf_ptr + i
+    print("\(String(format:"%02hhX ",offsetByte.load(as: UInt8.self)))",terminator: "")
+}
+device.close()
+
+buf_ptr.deallocate()
+