Add Trainer ID (#66)

Author: ShinySylveon04

reader_core/src/crystal/draw.rs

@@ -35,6 +35,8 @@ pub fn draw_rng(reader: &Gen2Reader) {
     pnp::println!("DIV {:04X}", measured_div());
     pnp::println!("State {:04X}", reader.rng_state());
     pnp::println!("Advances {}", rng_advance());
+    pnp::println!("");
+    pnp::println!("TID {}", reader.trainer_id());
 }
 
 pub fn draw_pkx(pkx: &Pk2) {

reader_core/src/crystal/reader.rs

@@ -10,6 +10,7 @@ struct Gen2Addresses {
     time_ptr: u32,
     time_day_ptr: u32,
     play_time_ptr: u32,
+    trainer_id_ptr: u32,
 }
 
 const CRYSTAL_ADDRESSES: Gen2Addresses = Gen2Addresses {
@@ -20,6 +21,7 @@ const CRYSTAL_ADDRESSES: Gen2Addresses = Gen2Addresses {
     time_ptr: 0xff94,
     time_day_ptr: 0xd4cb,
     play_time_ptr: 0xd4c5,
+    trainer_id_ptr: 0xd47b,
 };
 
 pub struct Gen2Reader {
@@ -92,4 +94,8 @@ impl Gen2Reader {
     pub fn dst(&self) -> bool {
         (gb_mem::read_u8(self.addrs.dst_ptr) & 0x80) != 0
     }
+
+    pub fn trainer_id(&self) -> u16 {
+        gb_mem::read_u16(self.addrs.trainer_id_ptr)
+    }
 }