Gambatte serial hack

serial.patch

From dfb2f47da8e1d8f810a7efb8409d18b80532be5e Mon Sep 17 00:00:00 2001
From: Pepijn de Vos <pepijndevos@gmail.com>
Date: Wed, 13 Jul 2016 15:54:19 +0200
Subject: [PATCH] hacketyhack

---
 libgambatte/SConstruct      |   1 +
 libgambatte/src/memory.cpp  |  14 +++++-
 libgambatte/src/pokemon.cpp | 109 ++++++++++++++++++++++++++++++++++++++++++++
 libgambatte/src/pokemon.h   |  54 ++++++++++++++++++++++
 4 files changed, 177 insertions(+), 1 deletion(-)
 create mode 100644 libgambatte/src/pokemon.cpp
 create mode 100644 libgambatte/src/pokemon.h

diff --git a/libgambatte/SConstruct b/libgambatte/SConstruct
index e882514..66fa83a 100644
--- a/libgambatte/SConstruct
+++ b/libgambatte/SConstruct
@@ -40,6 +40,7 @@ sourceFiles = Split('''
 			src/video/next_m0_time.cpp
 			src/video/ppu.cpp
 			src/video/sprite_mapper.cpp
+			src/pokemon.cpp
 		   ''')
 
 conf = env.Configure()
diff --git a/libgambatte/src/memory.cpp b/libgambatte/src/memory.cpp
index 2c1844e..6f65c0b 100644
--- a/libgambatte/src/memory.cpp
+++ b/libgambatte/src/memory.cpp
@@ -23,6 +23,13 @@
 #include "video.h"
 #include <cstring>
 
+// Serial hack
+#include "pokemon.h"
+
+//debug
+#include <iostream>
+#include <bitset>
+
 namespace gambatte {
 
 Memory::Memory(Interrupter const &interrupter)
@@ -128,19 +135,24 @@ void Memory::setEndtime(unsigned long cc, unsigned long inc) {
 }
 
 void Memory::updateSerial(unsigned long const cc) {
+    std::cout << std::hex << (int)ioamhram_[0x101] << ">";
 	if (intreq_.eventTime(intevent_serial) != disabled_time) {
 		if (intreq_.eventTime(intevent_serial) <= cc) {
-			ioamhram_[0x101] = (((ioamhram_[0x101] + 1) << serialCnt_) - 1) & 0xFF;
+            std::cout << "c>";
+			//ioamhram_[0x101] = (((ioamhram_[0x101] + 1) << serialCnt_) - 1) & 0xFF;
+			ioamhram_[0x101] = handleSerialByte(ioamhram_[0x101]);
 			ioamhram_[0x102] &= 0x7F;
 			intreq_.setEventTime<intevent_serial>(disabled_time);
 			intreq_.flagIrq(8);
 		} else {
+            std::cout << "n>";
 			int const targetCnt = serialCntFrom(intreq_.eventTime(intevent_serial) - cc,
 			                                    ioamhram_[0x102] & isCgb() * 2);
 			ioamhram_[0x101] = (((ioamhram_[0x101] + 1) << (serialCnt_ - targetCnt)) - 1) & 0xFF;
 			serialCnt_ = targetCnt;
 		}
 	}
+    std::cout << std::hex << (int)ioamhram_[0x101] << "\n";
 }
 
 void Memory::updateTimaIrq(unsigned long cc) {
diff --git a/libgambatte/src/pokemon.cpp b/libgambatte/src/pokemon.cpp
new file mode 100644
index 0000000..a5da7b3
--- /dev/null
+++ b/libgambatte/src/pokemon.cpp
@@ -0,0 +1,109 @@
+#include "pokemon.h"
+
+connection_state_t connection_state = NOT_CONNECTED;
+trade_centre_state_t trade_centre_state = INIT;
+int counter = 0;
+
+int trade_pokemon = -1;
+
+unsigned char handleSerialByte(unsigned char in) {
+  unsigned char send = 0x00;
+
+  switch(connection_state) {
+  case NOT_CONNECTED:
+    if(in == PKMN_MASTER)
+      send = PKMN_SLAVE;
+    else if(in == PKMN_BLANK)
+      send = PKMN_BLANK;
+    else if(in == PKMN_CONNECTED) {
+      send = PKMN_CONNECTED;
+      connection_state = CONNECTED;
+    }
+    break;
+
+  case CONNECTED:
+    if(in == PKMN_CONNECTED)
+      send = PKMN_CONNECTED;
+    else if(in == PKMN_TRADE_CENTRE)
+      connection_state = TRADE_CENTRE;
+    else if(in == PKMN_COLOSSEUM)
+      connection_state = COLOSSEUM;
+    else if(in == PKMN_BREAK_LINK || in == PKMN_MASTER) {
+      connection_state = NOT_CONNECTED;
+      send = PKMN_BREAK_LINK;
+    } else {
+      send = in;
+    }
+    break;
+
+  case TRADE_CENTRE:
+    if(trade_centre_state == INIT && in == 0x00) {
+      trade_centre_state = READY_TO_GO;
+      send = 0x00;
+    } else if(trade_centre_state == READY_TO_GO && in == 0xFD) {
+      trade_centre_state = SEEN_FIRST_WAIT;
+      send = 0xFD;
+    } else if(trade_centre_state == SEEN_FIRST_WAIT && in != 0xFD) {
+                        // random data of slave is ignored.
+      send = in;
+      trade_centre_state = SENDING_RANDOM_DATA;
+    } else if(trade_centre_state == SENDING_RANDOM_DATA && in == 0xFD) {
+      trade_centre_state = WAITING_TO_SEND_DATA;
+      send = 0xFD;
+    } else if(trade_centre_state == WAITING_TO_SEND_DATA && in != 0xFD) {
+      counter = 0;
+      // send first byte
+      send = in;
+      trade_centre_state = SENDING_DATA;
+      counter++;
+    } else if(trade_centre_state == SENDING_DATA) {
+      // if EEPROM is not initialised, please use the pgm data only.
+      send = in;
+      counter++;
+      if(counter == PLAYER_LENGTH) {
+        trade_centre_state = SENDING_PATCH_DATA;
+      }
+    } else if(trade_centre_state == SENDING_PATCH_DATA && in == 0xFD) {
+      counter = 0;
+      send = 0xFD;
+    } else if(trade_centre_state == SENDING_PATCH_DATA && in != 0xFD) {
+      send = in;
+      counter++;
+      if(counter == 197) {
+        trade_centre_state = TRADE_PENDING;
+      }
+    } else if(trade_centre_state == TRADE_PENDING && (in & 0x60) == 0x60) {
+      if (in == 0x6f) {
+        trade_centre_state = READY_TO_GO;
+        send = 0x6f;
+      } else {
+        send = 0x60; // first pokemon
+        trade_pokemon = in - 0x60;
+      }
+    } else if(trade_centre_state == TRADE_PENDING && in == 0x00) {
+      send = 0;
+      trade_centre_state = TRADE_CONFIRMATION;
+    } else if(trade_centre_state == TRADE_CONFIRMATION && (in & 0x60) == 0x60) {
+      send = in;
+      if (in  == 0x61) {
+        trade_pokemon = -1;
+        trade_centre_state = TRADE_PENDING;
+      } else {
+        trade_centre_state = DONE;
+      }
+    } else if(trade_centre_state == DONE && in == 0x00) {
+      send = 0;
+      trade_centre_state = INIT;
+    } else {
+      send = in;
+    }
+    break;
+
+  default:
+    send = in;
+    break;
+  }
+
+  return send;
+}
+
diff --git a/libgambatte/src/pokemon.h b/libgambatte/src/pokemon.h
new file mode 100644
index 0000000..177456e
--- /dev/null
+++ b/libgambatte/src/pokemon.h
@@ -0,0 +1,54 @@
+#ifndef POKEMON_H_
+#define POKEMON_H_
+
+#define PLAYER_LENGTH 418
+
+unsigned char handleSerialByte(unsigned char in);
+
+typedef enum {
+	NOT_CONNECTED,
+	CONNECTED,
+	TRADE_CENTRE,
+	COLOSSEUM
+} connection_state_t;
+
+typedef enum {
+	INIT,
+	READY_TO_GO,
+	SEEN_FIRST_WAIT,
+	SENDING_RANDOM_DATA,
+	WAITING_TO_SEND_DATA,
+	START_SENDING_DATA,
+	SENDING_DATA,
+        SENDING_PATCH_DATA,
+        TRADE_PENDING,
+        TRADE_CONFIRMATION,
+        DONE
+} trade_centre_state_t;
+
+typedef unsigned char byte;
+
+#define PKMN_BLANK						0x00
+
+#define ITEM_1_HIGHLIGHTED				0xD0
+#define ITEM_2_HIGHLIGHTED				0xD1
+#define ITEM_3_HIGHLIGHTED				0xD2
+#define ITEM_1_SELECTED					0xD4
+#define ITEM_2_SELECTED					0xD5
+#define ITEM_3_SELECTED					0xD6
+
+#define PKMN_MASTER						0x01
+#define PKMN_SLAVE						0x02
+#define PKMN_CONNECTED					0x60
+#define PKMN_WAIT						0x7F
+
+#define PKMN_ACTION						0x60
+
+#define PKMN_TRADE_CENTRE				ITEM_1_SELECTED
+#define PKMN_COLOSSEUM					ITEM_2_SELECTED
+#define PKMN_BREAK_LINK					ITEM_3_SELECTED
+
+#define TRADE_CENTRE_WAIT				0xFD
+
+#endif /* POKEMON_H_ */
+
-- 
1.9.1