1 files changed, 100 insertions, 0 deletions
diff --git a/ADSBDecoderFramework/DataFormat17.swift b/ADSBDecoderFramework/DataFormat17.swift
new file mode 100644
index 0000000..e1ea428
--- /dev/null
+++ b/ADSBDecoderFramework/DataFormat17.swift
@@ -0,0 +1,100 @@
+//
+//  DataFormat17.swift
+//  ADSBDecoder
+//
+//  Created by Jacky Jack on 27/09/2026.
+//
+
+import Foundation
+
+public class DataFormat17 {
+
+    let DataFormat=17 //0:5
+    var Capability=0  //5:7
+    public var AddressAnnounced=0 //8:31
+    public var TypeCode=0 //32:36
+    var MovementField=0//37:43
+    var HeadingBit=0//44
+    var HeadingField=0//45:51
+    //var CPROddEven=0//53
+    //var CPRlat=0//54:70
+    //var CPRlon=0//71:87
+    var ParityIntegrity=0//88-111
+    
+    //all avaliable message types
+    public var messageIdentification:ADSBTypeCodeIndentification? = nil
+    public var messageAirbornPositon:ADSBTypeCodeAirbonePositon? = nil
+
+    public init(_ adsb_data: String) {
+        //print("Dataformat: 17!")
+        //print(adsb_data)
+        
+        var bindata:[UInt8] = []
+        
+        var startN = adsb_data.startIndex
+        var endN = adsb_data.index(startN, offsetBy: 1)
+        var count=0//start index value
+        while (count<adsb_data.count) {
+            let u8 = UInt8(adsb_data[startN...endN], radix: 16)!
+            //print(adsb_data[startN...endN])
+            bindata.append(u8)
+            count += 2
+            if (count<adsb_data.count) {
+                startN = adsb_data.index(startN, offsetBy: 2)
+                endN = adsb_data.index(startN, offsetBy: 1)
+            }
+        }
+        //print(bindata)
+        
+        //Decode Capability
+        let cap = (bindata[0]>>1)&0x7
+        //print(String(format: "cap %02x", cap))
+        Capability = Int(cap)
+        
+        //Decode Address Announcement
+        let address_ann = UInt32(bindata[1])<<16 + UInt32(bindata[2])<<8 + UInt32(bindata[3])
+        //print(String(format: "address %06x", address_ann))
+        
+        AddressAnnounced = Int(address_ann)
+        
+        //Decode Type Code
+        let tc_byte = bindata[4] >> 3
+        //print(String(format: "tc %02d", tc_byte))
+        
+        TypeCode = Int(tc_byte)
+        
+        //aircraft indentification and category
+        if (tc_byte == 4) {
+            let msg = ADSBTypeCodeIndentification(bindata[4...10])
+            if decoder_debug_mode {
+                print("=====ADSB MESSSGE 04 =======")
+                print(msg)
+                print("============================")
+            }
+            
+            messageIdentification = msg
+        //airborn position
+        } else if ((tc_byte >= 8) && (tc_byte <= 18)) {
+            let msg = ADSBTypeCodeAirbonePositon(bindata[4...10])
+            if decoder_debug_mode {
+                print(String(format:"=====ADSB MESSSGE %02d ======= AA:%04d", tc_byte, AddressAnnounced))
+                print(msg)
+                print("============================")
+            }
+            
+            messageAirbornPositon = msg
+        //airborn velocity
+        } else if (tc_byte == 19) {
+            if decoder_debug_mode {
+                print("=====ADSB MESSSGE 19 =======")
+                print("=====VELOCITY =======")
+            }
+        } else {
+            if decoder_debug_mode {
+                print("=====ADSB MESSSGE UNKNOWN =======")
+            }
+        }
+    }
+}
+
+