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//
// 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()
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