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cartreader/Cart_Reader/GB.ino
Dakkaron 081a484629 Merge branch 'sanni:master' into master
2021-07-22 15:47:58 +02:00

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//******************************************
// GAME BOY MODULE
//******************************************
#include "options.h"
#ifdef enable_GBX
/******************************************
Variables
*****************************************/
// Game Boy
int sramBanks;
int romBanks;
uint16_t sramEndAddress = 0;
/******************************************
Menu
*****************************************/
// GBx start menu
static const char gbxMenuItem1[] PROGMEM = "Game Boy (Color)";
static const char gbxMenuItem2[] PROGMEM = "Game Boy Advance";
static const char gbxMenuItem3[] PROGMEM = "Flash GBC Cart";
static const char gbxMenuItem4[] PROGMEM = "Reset";
static const char* const menuOptionsGBx[] PROGMEM = {gbxMenuItem1, gbxMenuItem2, gbxMenuItem3, gbxMenuItem4};
// GB menu items
static const char GBMenuItem1[] PROGMEM = "Read Rom";
static const char GBMenuItem2[] PROGMEM = "Read Save";
static const char GBMenuItem3[] PROGMEM = "Write Save";
static const char GBMenuItem4[] PROGMEM = "Reset";
static const char* const menuOptionsGB[] PROGMEM = {GBMenuItem1, GBMenuItem2, GBMenuItem3, GBMenuItem4};
// GB Flash items
static const char GBFlashItem1[] PROGMEM = "CFI Cart";
static const char GBFlashItem2[] PROGMEM = "CFI Cart and Save";
static const char GBFlashItem3[] PROGMEM = "29F Cart (MBC3)";
static const char GBFlashItem4[] PROGMEM = "29F Cart (MBC5)";
static const char GBFlashItem5[] PROGMEM = "NPower GB Memory";
static const char GBFlashItem6[] PROGMEM = "GB Smart";
static const char GBFlashItem7[] PROGMEM = "Reset";
static const char* const menuOptionsGBFlash[] PROGMEM = {GBFlashItem1, GBFlashItem2, GBFlashItem3, GBFlashItem4, GBFlashItem5, GBFlashItem6, GBFlashItem7};
// Start menu for both GB and GBA
void gbxMenu() {
// create menu with title and 4 options to choose from
unsigned char gbType;
// Copy menuOptions out of progmem
convertPgm(menuOptionsGBx, 4);
gbType = question_box(F("Select Game Boy"), menuOptions, 4, 0);
// wait for user choice to come back from the question box menu
switch (gbType)
{
case 0:
display_Clear();
display_Update();
setup_GB();
mode = mode_GB;
break;
case 1:
display_Clear();
display_Update();
setup_GBA();
mode = mode_GBA;
break;
case 2:
// create submenu with title and 7 options to choose from
unsigned char gbFlash;
// Copy menuOptions out of progmem
convertPgm(menuOptionsGBFlash, 7);
gbFlash = question_box(F("Select type"), menuOptions, 7, 0);
// wait for user choice to come back from the question box menu
switch (gbFlash)
{
case 0:
// Flash CFI
display_Clear();
display_Update();
setup_GB();
mode = mode_GB;
// Change working dir to root
sd.chdir("/");
// Launch filebrowser
filePath[0] = '\0';
sd.chdir("/");
fileBrowser(F("Select file"));
display_Clear();
identifyCFI_GB();
if (!writeCFI_GB()) {
display_Clear();
println_Msg(F("Flashing failed, time out!"));
println_Msg(F("Press button..."));
display_Update();
wait();
}
// Reset
wait();
resetArduino();
break;
case 1:
// Flash CFI and Save
display_Clear();
display_Update();
setup_GB();
mode = mode_GB;
// Change working dir to root
sd.chdir("/");
// Launch filebrowser
filePath[0] = '\0';
sd.chdir("/");
fileBrowser(F("Select file"));
display_Clear();
identifyCFI_GB();
if (!writeCFI_GB()) {
display_Clear();
println_Msg(F("Flashing failed, time out!"));
println_Msg(F("Press button..."));
display_Update();
wait();
resetArduino();
}
getCartInfo_GB();
// Does cartridge have SRAM
if (sramEndAddress > 0) {
// Remove file name ending
int pos = -1;
while (fileName[++pos] != '\0') {
if (fileName[pos] == '.') {
fileName[pos] = '\0';
break;
}
}
sprintf(filePath, "/GB/SAVE/%s/", fileName);
bool saveFound = false;
if (sd.exists(filePath)) {
EEPROM_readAnything(0, foldern);
for (int i = foldern; i >= 0; i--) {
sprintf(filePath, "/GB/SAVE/%s/%d/%s.SAV", fileName, i, fileName);
if (sd.exists(filePath)) {
print_Msg(F("Save number "));
print_Msg(i);
println_Msg(F(" found."));
saveFound = true;
sprintf(filePath, "/GB/SAVE/%s/%d", fileName, i);
sprintf(fileName, "%s.SAV", fileName);
writeSRAM_GB();
unsigned long wrErrors;
wrErrors = verifySRAM_GB();
if (wrErrors == 0) {
println_Msg(F("Verified OK"));
display_Update();
}
else {
print_Msg(F("Error: "));
print_Msg(wrErrors);
println_Msg(F(" bytes "));
print_Error(F("did not verify."), false);
}
break;
}
}
}
if (!saveFound) {
println_Msg(F("Error: No save found."));
}
}
else {
print_Error(F("Cart has no Sram"), false);
}
// Reset
wait();
resetArduino();
break;
case 2:
//Flash MBC3
display_Clear();
display_Update();
setup_GB();
mode = mode_GB;
// Change working dir to root
sd.chdir("/");
//MBC3
writeFlash29F_GB(3);
// Reset
wait();
resetArduino();
break;
case 3:
//Flash MBC5
display_Clear();
display_Update();
setup_GB();
mode = mode_GB;
// Change working dir to root
sd.chdir("/");
//MBC5
writeFlash29F_GB(5);
// Reset
wait();
resetArduino();
break;
case 4:
// Flash GB Memory
display_Clear();
display_Update();
setup_GBM();
mode = mode_GBM;
break;
case 5:
// Flash GB Smart
display_Clear();
display_Update();
setup_GBSmart();
mode = mode_GB_GBSmart;
break;
case 6:
resetArduino();
break;
}
break;
case 3:
resetArduino();
break;
}
}
void gbMenu() {
// create menu with title and 3 options to choose from
unsigned char mainMenu;
// Copy menuOptions out of progmem
convertPgm(menuOptionsGB, 3);
mainMenu = question_box(F("GB Cart Reader"), menuOptions, 3, 0);
// wait for user choice to come back from the question box menu
switch (mainMenu)
{
case 0:
display_Clear();
// Change working dir to root
sd.chdir("/");
readROM_GB();
compare_checksum_GB();
break;
case 1:
display_Clear();
// Does cartridge have SRAM
if (sramEndAddress > 0) {
// Change working dir to root
sd.chdir("/");
readSRAM_GB();
}
else {
print_Error(F("Cart has no Sram"), false);
}
break;
case 2:
display_Clear();
// Does cartridge have SRAM
if (sramEndAddress > 0) {
// Change working dir to root
sd.chdir("/");
filePath[0] = '\0';
fileBrowser(F("Select sav file"));
writeSRAM_GB();
unsigned long wrErrors;
wrErrors = verifySRAM_GB();
if (wrErrors == 0) {
println_Msg(F("Verified OK"));
display_Update();
}
else {
print_Msg(F("Error: "));
print_Msg(wrErrors);
println_Msg(F(" bytes "));
print_Error(F("did not verify."), false);
}
}
else {
print_Error(F("Cart has no Sram"), false);
}
break;
case 3:
resetArduino();
break;
}
println_Msg(F(""));
println_Msg(F("Press Button..."));
display_Update();
wait();
}
/******************************************
Setup
*****************************************/
void setup_GB() {
// Set Address Pins to Output
//A0-A7
DDRF = 0xFF;
//A8-A15
DDRK = 0xFF;
// Set Control Pins to Output RST(PH0) CS(PH3) WR(PH5) RD(PH6)
DDRH |= (1 << 0) | (1 << 3) | (1 << 5) | (1 << 6);
// Output a high signal on all pins, pins are active low therefore everything is disabled now
PORTH |= (1 << 0) | (1 << 3) | (1 << 5) | (1 << 6);
// Set Data Pins (D0-D7) to Input
DDRC = 0x00;
// Disable Internal Pullups
//PORTC = 0x00;
delay(400);
// Print start page
getCartInfo_GB();
showCartInfo_GB();
}
void showCartInfo_GB() {
display_Clear();
if (strcmp(checksumStr, "00") != 0) {
println_Msg(F("GB Cart Info"));
print_Msg(F("Name: "));
println_Msg(romName);
print_Msg(F("Rom Type: "));
switch (romType) {
case 0: print_Msg(F("ROM ONLY")); break;
case 1: print_Msg(F("MBC1")); break;
case 2: print_Msg(F("MBC1+RAM")); break;
case 3: print_Msg(F("MBC1+RAM")); break;
case 5: print_Msg(F("MBC2")); break;
case 6: print_Msg(F("MBC2")); break;
case 8: print_Msg(F("ROM+RAM")); break;
case 9: print_Msg(F("ROM ONLY")); break;
case 11: print_Msg(F("MMM01")); break;
case 12: print_Msg(F("MMM01+RAM")); break;
case 13: print_Msg(F("MMM01+RAM")); break;
case 15: print_Msg(F("MBC3+TIMER")); break;
case 16: print_Msg(F("MBC3+TIMER+RAM")); break;
case 17: print_Msg(F("MBC3")); break;
case 18: print_Msg(F("MBC3+RAM")); break;
case 19: print_Msg(F("MBC3+RAM")); break;
case 21: print_Msg(F("MBC4")); break;
case 22: print_Msg(F("MBC4+RAM")); break;
case 23: print_Msg(F("MBC4+RAM")); break;
case 25: print_Msg(F("MBC5")); break;
case 26: print_Msg(F("MBC5+RAM")); break;
case 27: print_Msg(F("MBC5+RAM")); break;
case 28: print_Msg(F("MBC5+RUMBLE")); break;
case 29: print_Msg(F("MBC5+RUMBLE+RAM")); break;
case 30: print_Msg(F("MBC5+RUMBLE+RAM")); break;
case 252: print_Msg(F("Gameboy Camera")); break;
default: print_Msg(F("Not found"));
}
println_Msg(F(" "));
print_Msg(F("Rom Size: "));
switch (romSize) {
case 0: print_Msg(F("32KB")); break;
case 1: print_Msg(F("64KB")); break;
case 2: print_Msg(F("128KB")); break;
case 3: print_Msg(F("256KB")); break;
case 4: print_Msg(F("512KB")); break;
case 5: print_Msg(F("1MB")); break;
case 6: print_Msg(F("2MB")); break;
case 7: print_Msg(F("4MB")); break;
case 82: print_Msg(F("1.1MB")); break;
case 83: print_Msg(F("1.2MB")); break;
case 84: print_Msg(F("1.5MB)")); break;
default: print_Msg(F("Not found"));
}
println_Msg(F(""));
print_Msg(F("Banks: "));
println_Msg(romBanks);
print_Msg(F("Sram Size: "));
switch (sramSize) {
case 0:
if (romType == 6) {
print_Msg(F("512B"));
}
else {
print_Msg(F("None"));
}
break;
case 1: print_Msg(F("2KB")); break;
case 2: print_Msg(F("8KB")); break;
case 3: print_Msg(F("32KB")); break;
case 4: print_Msg(F("128KB")); break;
default: print_Msg(F("Not found"));
}
println_Msg(F(""));
print_Msg(F("Checksum: "));
println_Msg(checksumStr);
display_Update();
// Wait for user input
println_Msg(F("Press Button..."));
display_Update();
wait();
}
else {
print_Error(F("GAMEPAK ERROR"), true);
}
}
/******************************************
Low level functions
*****************************************/
// Switch data pins to read
void dataIn_GB() {
// Set to Input
DDRC = 0x00;
}
byte readByte_GB(word myAddress) {
PORTF = myAddress & 0xFF;
PORTK = (myAddress >> 8) & 0xFF;
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Switch RD(PH6) to LOW
PORTH &= ~(1 << 6);
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Read
byte tempByte = PINC;
// Switch and RD(PH6) to HIGH
PORTH |= (1 << 6);
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
return tempByte;
}
void writeByte_GB(int myAddress, uint8_t myData) {
PORTF = myAddress & 0xFF;
PORTK = (myAddress >> 8) & 0xFF;
PORTC = myData;
// Arduino running at 16Mhz -> one nop = 62.5ns
// Wait till output is stable
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Pull WR(PH5) low
PORTH &= ~(1 << 5);
// Leave WE low for at least 60ns
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Pull WR(PH5) HIGH
PORTH |= (1 << 5);
// Leave WE high for at least 50ns
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
}
byte readByteSRAM_GB(word myAddress) {
PORTF = myAddress & 0xFF;
PORTK = (myAddress >> 8) & 0xFF;
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Pull CS(PH3) LOW
PORTH &= ~(1 << 3);
// Pull RD(PH6) LOW
PORTH &= ~(1 << 6);
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Read
byte tempByte = PINC;
// Pull CS(PH3) HIGH
PORTH |= (1 << 3);
// Pull RD(PH6) HIGH
PORTH |= (1 << 6);
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
return tempByte;
}
void writeByteSRAM_GB(int myAddress, uint8_t myData) {
PORTF = myAddress & 0xFF;
PORTK = (myAddress >> 8) & 0xFF;
PORTC = myData;
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Pull CS(PH3) LOW
PORTH &= ~(1 << 3);
// Pull WR(PH5) low
PORTH &= ~(1 << 5);
// Leave WE low for at least 60ns
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Pull WR(PH5) HIGH
PORTH |= (1 << 5);
// Pull CS(PH3) HIGH
PORTH |= (1 << 3);
// Leave WE high for at least 50ns
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
}
/******************************************
Game Boy functions
*****************************************/
// Read Cartridge Header
void getCartInfo_GB() {
romType = readByte_GB(0x0147);
romSize = readByte_GB(0x0148);
sramSize = readByte_GB(0x0149);
// ROM banks
romBanks = 2; // Default 32K
if (romSize >= 1) { // Calculate rom size
romBanks = 2 << romSize;
}
// RAM banks
sramBanks = 0; // Default 0K RAM
if (romType == 6) {
sramBanks = 1;
}
switch (sramSize) {
case 2:
sramBanks = 1;
break;
case 3:
sramBanks = 4;
break;
case 4:
sramBanks = 16;
break;
case 5:
sramBanks = 8;
break;
}
// RAM end address
if (romType == 6) {
sramEndAddress = 0xA1FF; // MBC2 512bytes (nibbles)
}
if (sramSize == 1) {
sramEndAddress = 0xA7FF; // 2K RAM
}
if (sramSize > 1) {
sramEndAddress = 0xBFFF; // 8K RAM
}
// Get Checksum as string
sprintf(checksumStr, "%02X%02X", readByte_GB(0x014E), readByte_GB(0x014F));
// Get name
byte myByte = 0;
byte myLength = 0;
for (int addr = 0x0134; addr <= 0x13C; addr++) {
myByte = readByte_GB(addr);
if (((char(myByte) >= 48 && char(myByte) <= 57) || (char(myByte) >= 65 && char(myByte) <= 122)) && myLength < 15) {
romName[myLength] = char(myByte);
myLength++;
}
}
}
/******************************************
ROM functions
*****************************************/
// Dump ROM
void readROM_GB() {
// Get name, add extension and convert to char array for sd lib
strcpy(fileName, romName);
strcat(fileName, ".GB");
// create a new folder for the rom file
EEPROM_readAnything(0, foldern);
sprintf(folder, "GB/ROM/%s/%d", romName, foldern);
sd.mkdir(folder, true);
sd.chdir(folder);
display_Clear();
print_Msg(F("Saving to "));
print_Msg(folder);
println_Msg(F("/..."));
display_Update();
// write new folder number back to eeprom
foldern = foldern + 1;
EEPROM_writeAnything(0, foldern);
//open file on sd card
if (!myFile.open(fileName, O_RDWR | O_CREAT)) {
print_Error(F("Can't create file on SD"), true);
}
uint16_t romAddress = 0;
// Read number of banks and switch banks
for (uint16_t bank = 1; bank < romBanks; bank++) {
// Switch data pins to output
dataOut();
if (romType >= 5) { // MBC2 and above
writeByte_GB(0x2100, bank); // Set ROM bank
}
else { // MBC1
writeByte_GB(0x6000, 0); // Set ROM Mode
writeByte_GB(0x4000, bank >> 5); // Set bits 5 & 6 (01100000) of ROM bank
writeByte_GB(0x2000, bank & 0x1F); // Set bits 0 & 4 (00011111) of ROM bank
}
// Switch data pins to intput
dataIn_GB();
if (bank > 1) {
romAddress = 0x4000;
}
// Read up to 7FFF per bank
while (romAddress <= 0x7FFF) {
uint8_t readData[512];
for (int i = 0; i < 512; i++) {
readData[i] = readByte_GB(romAddress + i);
}
myFile.write(readData, 512);
romAddress += 512;
}
}
// Close the file:
myFile.close();
}
unsigned int calc_checksum_GB (char* fileName, char* folder) {
unsigned int calcChecksum = 0;
// int calcFilesize = 0; // unused
unsigned long i = 0;
int c = 0;
if (strcmp(folder, "root") != 0)
sd.chdir(folder);
// If file exists
if (myFile.open(fileName, O_READ)) {
//calcFilesize = myFile.fileSize() * 8 / 1024 / 1024; // unused
for (i = 0; i < (myFile.fileSize() / 512); i++) {
myFile.read(sdBuffer, 512);
for (c = 0; c < 512; c++) {
calcChecksum += sdBuffer[c];
}
}
myFile.close();
sd.chdir();
// Subtract checksum bytes
calcChecksum -= readByte_GB(0x014E);
calcChecksum -= readByte_GB(0x014F);
// Return result
return (calcChecksum);
}
// Else show error
else {
print_Error(F("DUMP ROM 1ST"), false);
return 0;
}
}
boolean compare_checksum_GB() {
println_Msg(F("Calculating Checksum"));
display_Update();
strcpy(fileName, romName);
strcat(fileName, ".GB");
// last used rom folder
EEPROM_readAnything(0, foldern);
sprintf(folder, "GB/ROM/%s/%d", romName, foldern - 1);
char calcsumStr[5];
sprintf(calcsumStr, "%04X", calc_checksum_GB(fileName, folder));
if (strcmp(calcsumStr, checksumStr) == 0) {
print_Msg(F("Result: "));
println_Msg(calcsumStr);
println_Msg(F("Checksum matches"));
display_Update();
return 1;
}
else {
print_Msg(F("Result: "));
println_Msg(calcsumStr);
print_Error(F("Checksum Error"), false);
return 0;
}
}
/******************************************
SRAM functions
*****************************************/
// Read RAM
void readSRAM_GB() {
// Does cartridge have RAM
if (sramEndAddress > 0) {
// Get name, add extension and convert to char array for sd lib
strcpy(fileName, romName);
strcat(fileName, ".sav");
// create a new folder for the save file
EEPROM_readAnything(0, foldern);
sprintf(folder, "GB/SAVE/%s/%d", romName, foldern);
sd.mkdir(folder, true);
sd.chdir(folder);
// write new folder number back to eeprom
foldern = foldern + 1;
EEPROM_writeAnything(0, foldern);
//open file on sd card
if (!myFile.open(fileName, O_RDWR | O_CREAT)) {
print_Error(F("SD Error"), true);
}
dataIn_GB();
// MBC2 Fix (unknown why this fixes it, maybe has to read ROM before RAM?)
readByte_GB(0x0134);
dataOut();
if (romType <= 4) { // MBC1
writeByte_GB(0x6000, 1); // Set RAM Mode
}
// Initialise MBC
writeByte_GB(0x0000, 0x0A);
// Switch SRAM banks
for (uint8_t bank = 0; bank < sramBanks; bank++) {
dataOut();
writeByte_GB(0x4000, bank);
// Read SRAM
dataIn_GB();
for (uint16_t sramAddress = 0xA000; sramAddress <= sramEndAddress; sramAddress += 64) {
uint8_t readData[64];
for (uint8_t i = 0; i < 64; i++) {
readData[i] = readByteSRAM_GB(sramAddress + i);
}
myFile.write(readData, 64);
}
}
// Disable SRAM
dataOut();
writeByte_GB(0x0000, 0x00);
dataIn_GB();
// Close the file:
myFile.close();
// Signal end of process
print_Msg(F("Saved to "));
print_Msg(folder);
println_Msg(F("/"));
display_Update();
}
else {
print_Error(F("Cart has no SRAM"), false);
}
}
// Write RAM
void writeSRAM_GB() {
// Does cartridge have SRAM
if (sramEndAddress > 0) {
// Create filepath
sprintf(filePath, "%s/%s", filePath, fileName);
//open file on sd card
if (myFile.open(filePath, O_READ)) {
// Set pins to input
dataIn_GB();
// MBC2 Fix (unknown why this fixes it, maybe has to read ROM before RAM?)
readByte_GB(0x0134);
dataOut();
if (romType <= 4) { // MBC1
writeByte_GB(0x6000, 1); // Set RAM Mode
}
// Initialise MBC
writeByte_GB(0x0000, 0x0A);
// Switch RAM banks
for (uint8_t bank = 0; bank < sramBanks; bank++) {
writeByte_GB(0x4000, bank);
// Write RAM
for (uint16_t sramAddress = 0xA000; sramAddress <= sramEndAddress; sramAddress++) {
writeByteSRAM_GB(sramAddress, myFile.read());
}
}
// Disable RAM
writeByte_GB(0x0000, 0x00);
// Set pins to input
dataIn_GB();
// Close the file:
myFile.close();
display_Clear();
println_Msg(F("SRAM writing finished"));
display_Update();
}
else {
print_Error(F("File doesnt exist"), false);
}
}
else {
print_Error(F("Cart has no SRAM"), false);
}
}
// Check if the SRAM was written without any error
unsigned long verifySRAM_GB() {
//open file on sd card
if (myFile.open(filePath, O_READ)) {
// Variable for errors
writeErrors = 0;
dataIn_GB();
// MBC2 Fix (unknown why this fixes it, maybe has to read ROM before RAM?)
readByte_GB(0x0134);
// Does cartridge have RAM
if (sramEndAddress > 0) {
dataOut();
if (romType <= 4) { // MBC1
writeByte_GB(0x6000, 1); // Set RAM Mode
}
// Initialise MBC
writeByte_GB(0x0000, 0x0A);
// Switch SRAM banks
for (uint8_t bank = 0; bank < sramBanks; bank++) {
dataOut();
writeByte_GB(0x4000, bank);
// Read SRAM
dataIn_GB();
for (uint16_t sramAddress = 0xA000; sramAddress <= sramEndAddress; sramAddress += 64) {
//fill sdBuffer
myFile.read(sdBuffer, 64);
for (int c = 0; c < 64; c++) {
if (readByteSRAM_GB(sramAddress + c) != sdBuffer[c]) {
writeErrors++;
}
}
}
}
dataOut();
// Disable RAM
writeByte_GB(0x0000, 0x00);
dataIn_GB();
}
// Close the file:
myFile.close();
return writeErrors;
}
else {
print_Error(F("Can't open file"), true);
}
}
/******************************************
29F016/29F032/29F033 flashrom functions
*****************************************/
// Write 29F032 flashrom
// A0-A13 directly connected to cart edge -> 16384(0x0-0x3FFF) bytes per bank -> 256(0x0-0xFF) banks
// A14-A21 connected to MBC5
void writeFlash29F_GB(byte MBC) {
// Launch filebrowser
filePath[0] = '\0';
sd.chdir("/");
fileBrowser(F("Select file"));
display_Clear();
// Create filepath
sprintf(filePath, "%s/%s", filePath, fileName);
// Open file on sd card
if (myFile.open(filePath, O_READ)) {
// Get rom size from file
myFile.seekCur(0x147);
romType = myFile.read();
romSize = myFile.read();
// Go back to file beginning
myFile.seekSet(0);
// ROM banks
romBanks = 2; // Default 32K
if (romSize >= 1) { // Calculate rom size
romBanks = 2 << romSize;
}
// Set data pins to output
dataOut();
// Set ROM bank hi 0
writeByte_GB(0x3000, 0);
// Set ROM bank low 0
writeByte_GB(0x2000, 0);
delay(100);
// Reset flash
writeByte_GB(0x555, 0xf0);
delay(100);
// ID command sequence
writeByte_GB(0x555, 0xaa);
writeByte_GB(0x2aa, 0x55);
writeByte_GB(0x555, 0x90);
dataIn_GB();
// Read the two id bytes into a string
sprintf(flashid, "%02X%02X", readByte_GB(0), readByte_GB(1));
if (strcmp(flashid, "04D4") == 0) {
println_Msg(F("MBM29F033C"));
print_Msg(F("Banks: "));
print_Msg(romBanks);
println_Msg(F("/256"));
display_Update();
}
else if (strcmp(flashid, "0141") == 0) {
println_Msg(F("AM29F032B"));
print_Msg(F("Banks: "));
print_Msg(romBanks);
println_Msg(F("/256"));
display_Update();
}
else if (strcmp(flashid, "01AD") == 0) {
println_Msg(F("AM29F016B"));
print_Msg(F("Banks: "));
print_Msg(romBanks);
println_Msg(F("/128"));
display_Update();
}
else if (strcmp(flashid, "04AD") == 0) {
println_Msg(F("AM29F016D"));
print_Msg(F("Banks: "));
print_Msg(romBanks);
println_Msg(F("/128"));
display_Update();
}
else if (strcmp(flashid, "01D5") == 0) {
println_Msg(F("AM29F080B"));
print_Msg(F("Banks: "));
print_Msg(romBanks);
println_Msg(F("/64"));
display_Update();
}
else {
print_Msg(F("Flash ID: "));
println_Msg(flashid);
display_Update();
print_Error(F("Unknown flashrom"), true);
}
dataOut();
// Reset flash
writeByte_GB(0x555, 0xf0);
delay(100);
println_Msg(F("Erasing flash"));
display_Update();
// Erase flash
writeByte_GB(0x555, 0xaa);
writeByte_GB(0x2aa, 0x55);
writeByte_GB(0x555, 0x80);
writeByte_GB(0x555, 0xaa);
writeByte_GB(0x2aa, 0x55);
writeByte_GB(0x555, 0x10);
dataIn_GB();
// Read the status register
byte statusReg = readByte_GB(0);
// After a completed erase D7 will output 1
while ((statusReg & 0x80) != 0x80) {
// Blink led
PORTB ^= (1 << 4);
delay(100);
// Update Status
statusReg = readByte_GB(0);
}
// Blankcheck
println_Msg(F("Blankcheck"));
display_Update();
// Read x number of banks
for (int currBank = 0; currBank < romBanks; currBank++) {
// Blink led
PORTB ^= (1 << 4);
dataOut();
// Set ROM bank
writeByte_GB(0x2000, currBank);
dataIn();
for (unsigned int currAddr = 0x4000; currAddr < 0x7FFF; currAddr += 512) {
uint8_t readData[512];
for (int currByte = 0; currByte < 512; currByte++) {
readData[currByte] = readByte_GB(currAddr + currByte);
}
for (int j = 0; j < 512; j++) {
if (readData[j] != 0xFF) {
println_Msg(F("Not empty"));
print_Error(F("Erase failed"), true);
}
}
}
}
if (MBC == 3) {
println_Msg(F("Writing flash MBC3"));
display_Update();
// Write flash
dataOut();
uint16_t currAddr = 0;
uint16_t endAddr = 0x3FFF;
for (int currBank = 0; currBank < romBanks; currBank++) {
// Blink led
PORTB ^= (1 << 4);
// Set ROM bank
writeByte_GB(0x2100, currBank);
if (currBank > 0) {
currAddr = 0x4000;
endAddr = 0x7FFF;
}
while (currAddr <= endAddr) {
myFile.read(sdBuffer, 512);
for (int currByte = 0; currByte < 512; currByte++) {
// Write command sequence
writeByte_GB(0x555, 0xaa);
writeByte_GB(0x2aa, 0x55);
writeByte_GB(0x555, 0xa0);
// Write current byte
writeByte_GB(currAddr + currByte, sdBuffer[currByte]);
// Set data pins to input
dataIn();
// Setting CS(PH3) and OE/RD(PH6) LOW
PORTH &= ~((1 << 3) | (1 << 6));
// Busy check
while ((PINC & 0x80) != (sdBuffer[currByte] & 0x80)) {
}
// Switch CS(PH3) and OE/RD(PH6) to HIGH
PORTH |= (1 << 3) | (1 << 6);
// Set data pins to output
dataOut();
}
currAddr += 512;
}
}
}
else if (MBC == 5) {
println_Msg(F("Writing flash MBC5"));
display_Update();
// Write flash
dataOut();
for (int currBank = 0; currBank < romBanks; currBank++) {
// Blink led
PORTB ^= (1 << 4);
// Set ROM bank
writeByte_GB(0x2000, currBank);
// 0x2A8000 fix
writeByte_GB(0x4000, 0x0);
for (unsigned int currAddr = 0x4000; currAddr < 0x7FFF; currAddr += 512) {
myFile.read(sdBuffer, 512);
for (int currByte = 0; currByte < 512; currByte++) {
// Write command sequence
writeByte_GB(0x555, 0xaa);
writeByte_GB(0x2aa, 0x55);
writeByte_GB(0x555, 0xa0);
// Write current byte
writeByte_GB(currAddr + currByte, sdBuffer[currByte]);
// Set data pins to input
dataIn();
// Setting CS(PH3) and OE/RD(PH6) LOW
PORTH &= ~((1 << 3) | (1 << 6));
// Busy check
while ((PINC & 0x80) != (sdBuffer[currByte] & 0x80)) {
}
// Switch CS(PH3) and OE/RD(PH6) to HIGH
PORTH |= (1 << 3) | (1 << 6);
// Set data pins to output
dataOut();
}
}
}
}
// Set data pins to input again
dataIn_GB();
println_Msg(F("Verifying"));
display_Update();
// Go back to file beginning
myFile.seekSet(0);
//unsigned int addr = 0; // unused
writeErrors = 0;
// Verify flashrom
uint16_t romAddress = 0;
// Read number of banks and switch banks
for (uint16_t bank = 1; bank < romBanks; bank++) {
// Switch data pins to output
dataOut();
if (romType >= 5) { // MBC2 and above
writeByte_GB(0x2100, bank); // Set ROM bank
}
else { // MBC1
writeByte_GB(0x6000, 0); // Set ROM Mode
writeByte_GB(0x4000, bank >> 5); // Set bits 5 & 6 (01100000) of ROM bank
writeByte_GB(0x2000, bank & 0x1F); // Set bits 0 & 4 (00011111) of ROM bank
}
// Switch data pins to intput
dataIn_GB();
if (bank > 1) {
romAddress = 0x4000;
}
// Blink led
PORTB ^= (1 << 4);
// Read up to 7FFF per bank
while (romAddress <= 0x7FFF) {
// Fill sdBuffer
myFile.read(sdBuffer, 512);
// Compare
for (int i = 0; i < 512; i++) {
if (readByte_GB(romAddress + i) != sdBuffer[i]) {
writeErrors++;
}
}
romAddress += 512;
}
}
// Close the file:
myFile.close();
if (writeErrors == 0) {
println_Msg(F("OK"));
display_Update();
}
else {
print_Msg(F("Error: "));
print_Msg(writeErrors);
println_Msg(F(" bytes "));
print_Error(F("did not verify."), false);
}
}
else {
println_Msg(F("Can't open file"));
display_Update();
}
}
/******************************************
CFU flashrom functions
*****************************************/
/*
Flash chips can either be in x8 mode or x16 mode and sometimes the two
least significant bits on flash cartridges' data lines are swapped.
This function reads a byte and compensates for the differences.
This is only necessary for commands to the flash, not for data read from the flash, the MBC or SRAM.
address needs to be the x8 mode address of the flash register that should be read.
*/
byte readByteCompensated(int address) {
byte data = readByte_GB(address >> (flashX16Mode ? 1 : 0));
if (flashSwitchLastBits) {
return (data & 0b11111100) | ((data << 1) & 0b10) | ((data >> 1) & 0b01);
}
return data;
}
/*
Flash chips can either be in x8 mode or x16 mode and sometimes the two
least significant bits on flash cartridges' data lines are swapped.
This function writes a byte and compensates for the differences.
This is only necessary for commands to the flash, not for data written to the flash, the MBC or SRAM.
.
address needs to be the x8 mode address of the flash register that should be read.
*/
byte writeByteCompensated(int address, byte data) {
if (flashSwitchLastBits) {
data = (data & 0b11111100) | ((data << 1) & 0b10) | ((data >> 1) & 0b01);
}
writeByte_GB(address >> (flashX16Mode ? 1 : 0), data);
}
void startCFIMode(boolean x16Mode) {
if (x16Mode) {
writeByte_GB(0x555, 0xf0); //x16 mode reset command
delay(500);
writeByte_GB(0x555, 0xf0); //Double reset to get out of possible Autoselect + CFI mode
delay(500);
writeByte_GB(0x55, 0x98); //x16 CFI Query command
} else {
writeByte_GB(0xAAA, 0xf0); //x8 mode reset command
delay(100);
writeByte_GB(0xAAA, 0xf0); //Double reset to get out of possible Autoselect + CFI mode
delay(100);
writeByte_GB(0xAA, 0x98); //x8 CFI Query command
}
}
/* Identify the different flash chips.
Sets the global variables flashBanks, flashX16Mode and flashSwitchLastBits
*/
void identifyCFI_GB() {
// Reset flash
display_Clear();
dataOut();
writeByte_GB(0x6000, 0); // Set ROM Mode
writeByte_GB(0x2000, 0); // Set Bank to 0
writeByte_GB(0x3000, 0);
startCFIMode(false); // Trying x8 mode first
dataIn_GB();
display_Clear();
// Try x8 mode first
char cfiQRYx8[7];
char cfiQRYx16[7];
sprintf(cfiQRYx8, "%02X%02X%02X", readByte_GB(0x20), readByte_GB(0x22), readByte_GB(0x24));
sprintf(cfiQRYx16, "%02X%02X%02X", readByte_GB(0x10), readByte_GB(0x11), readByte_GB(0x12)); // some devices use x8-style CFI Query command even though they are in x16 command mode
if (strcmp(cfiQRYx8, "515259") == 0) { // QRY in x8 mode
println_Msg(F("Normal CFI x8 Mode"));
flashX16Mode = false;
flashSwitchLastBits = false;
} else if (strcmp(cfiQRYx8, "52515A") == 0) { // QRY in x8 mode with switched last bit
println_Msg(F("Switched CFI x8 Mode"));
flashX16Mode = false;
flashSwitchLastBits = true;
} else if (strcmp(cfiQRYx16, "515259") == 0) { // QRY in x16 mode
println_Msg(F("Normal CFI x16 Mode"));
flashX16Mode = true;
flashSwitchLastBits = false;
} else if (strcmp(cfiQRYx16, "52515A") == 0) { // QRY in x16 mode with switched last bit
println_Msg(F("Switched CFI x16 Mode"));
flashX16Mode = true;
flashSwitchLastBits = true;
} else {
startCFIMode(true); // Try x16 mode next
sprintf(cfiQRYx16, "%02X%02X%02X", readByte_GB(0x10), readByte_GB(0x11), readByte_GB(0x12));
if (strcmp(cfiQRYx16, "515259") == 0) { // QRY in x16 mode
println_Msg(F("Normal CFI x16 Mode"));
flashX16Mode = true;
flashSwitchLastBits = false;
} else if (strcmp(cfiQRYx16, "52515A") == 0) { // QRY in x16 mode with switched last bit
println_Msg(F("Switched CFI x16 Mode"));
flashX16Mode = true;
flashSwitchLastBits = true;
} else {
println_Msg(F("CFI Query failed!"));
display_Update();
wait();
return 0;
}
}
dataIn_GB();
flashBanks = 1 << (readByteCompensated(0x4E) - 14); // - flashX16Mode);
dataOut();
// Reset flash
writeByteCompensated(0xAAA, 0xf0);
delay(100);
}
// Write 29F032 flashrom
// A0-A13 directly connected to cart edge -> 16384(0x0-0x3FFF) bytes per bank -> 256(0x0-0xFF) banks
// A14-A21 connected to MBC5
// identifyFlash_GB() needs to be run before this!
bool writeCFI_GB() {
// Create filepath
sprintf(filePath, "%s/%s", filePath, fileName);
// Open file on sd card
if (myFile.open(filePath, O_READ)) {
// Get rom size from file
myFile.seekCur(0x147);
romType = myFile.read();
romSize = myFile.read();
// Go back to file beginning
myFile.seekSet(0);
// ROM banks
romBanks = 2; // Default 32K
if (romSize >= 1) { // Calculate rom size
romBanks = 2 << romSize;
}
if (romBanks <= flashBanks) {
print_Msg(F("Using "));
print_Msg(romBanks);
print_Msg(F("/"));
print_Msg(flashBanks);
println_Msg(F(" Banks"));
display_Update();
} else {
println_Msg(F("Error: Flash has too few banks!"));
print_Msg(F("Has "));
print_Msg(flashBanks);
println_Msg(F(" banks,"));
print_Msg(F("but needs "));
print_Msg(romBanks);
println_Msg(F("."));
println_Msg(F("Press button..."));
display_Update();
wait();
resetArduino();
}
// Set data pins to output
dataOut();
// Set ROM bank hi 0
writeByte_GB(0x3000, 0);
// Set ROM bank low 0
writeByte_GB(0x2000, 0);
delay(100);
// Reset flash
writeByteCompensated(0xAAA, 0xf0);
delay(100);
dataOut();
// Reset flash
writeByte_GB(0x555, 0xf0);
delay(100);
println_Msg(F("Erasing flash"));
display_Update();
// Erase flash
writeByteCompensated(0xAAA, 0xaa);
writeByteCompensated(0x555, 0x55);
writeByteCompensated(0xAAA, 0x80);
writeByteCompensated(0xAAA, 0xaa);
writeByteCompensated(0x555, 0x55);
writeByteCompensated(0xAAA, 0x10);
dataIn_GB();
// Read the status register
byte statusReg = readByte_GB(0);
// After a completed erase D7 will output 1
while ((statusReg & 0x80) != 0x80) {
// Blink led
PORTB ^= (1 << 4);
delay(100);
// Update Status
statusReg = readByte_GB(0);
}
// Blankcheck
println_Msg(F("Blankcheck"));
display_Update();
// Read x number of banks
for (int currBank = 0; currBank < romBanks; currBank++) {
// Blink led
PORTB ^= (1 << 4);
dataOut();
// Set ROM bank
writeByte_GB(0x2000, currBank);
dataIn();
for (unsigned int currAddr = 0x4000; currAddr < 0x7FFF; currAddr += 512) {
uint8_t readData[512];
for (int currByte = 0; currByte < 512; currByte++) {
readData[currByte] = readByte_GB(currAddr + currByte);
}
for (int j = 0; j < 512; j++) {
if (readData[j] != 0xFF) {
println_Msg(F("Not empty"));
print_Error(F("Erase failed"), true);
}
}
}
}
println_Msg(F("Writing flash MBC3/5"));
display_Update();
// Write flash
dataOut();
uint16_t currAddr = 0;
uint16_t endAddr = 0x3FFF;
for (int currBank = 0; currBank < romBanks; currBank++) {
// Blink led
PORTB ^= (1 << 4);
// Set ROM bank
writeByte_GB(0x2100, currBank);
// 0x2A8000 fix
writeByte_GB(0x4000, 0x0);
if (currBank > 0) {
currAddr = 0x4000;
endAddr = 0x7FFF;
}
while (currAddr <= endAddr) {
myFile.read(sdBuffer, 512);
for (int currByte = 0; currByte < 512; currByte++) {
// Write command sequence
writeByteCompensated(0xAAA, 0xaa);
writeByteCompensated(0x555, 0x55);
writeByteCompensated(0xAAA, 0xa0);
// Write current byte
writeByte_GB(currAddr + currByte, sdBuffer[currByte]);
// Set data pins to input
dataIn();
// Setting CS(PH3) and OE/RD(PH6) LOW
PORTH &= ~((1 << 3) | (1 << 6));
// Busy check
short i = 0;
while ((PINC & 0x80) != (sdBuffer[currByte] & 0x80)) {
i++;
if (i > 500) {
if (currAddr < 0x4000) { // This happens when trying to flash an MBC5 as if it was an MBC3. Retry to flash as MBC5, starting from last successfull byte.
currByte--;
currAddr += 0x4000;
endAddr = 0x7FFF;
break;
} else { // If a timeout happens while trying to flash MBC5-style, flashing failed.
return false;
}
}
}
// Switch CS(PH3) and OE/RD(PH6) to HIGH
PORTH |= (1 << 3) | (1 << 6);
__asm__("nop\n\tnop\n\tnop\n\t"); // Waste a few CPU cycles to remove write errors
// Set data pins to output
dataOut();
}
currAddr += 512;
}
}
// Set data pins to input again
dataIn_GB();
display_Clear();
println_Msg(F("Verifying"));
display_Update();
// Go back to file beginning
myFile.seekSet(0);
//unsigned int addr = 0; // unused
writeErrors = 0;
// Verify flashrom
uint16_t romAddress = 0;
// Read number of banks and switch banks
for (uint16_t bank = 1; bank < romBanks; bank++) {
// Switch data pins to output
dataOut();
if (romType >= 5) { // MBC2 and above
writeByte_GB(0x2100, bank); // Set ROM bank
}
else { // MBC1
writeByte_GB(0x6000, 0); // Set ROM Mode
writeByte_GB(0x4000, bank >> 5); // Set bits 5 & 6 (01100000) of ROM bank
writeByte_GB(0x2000, bank & 0x1F); // Set bits 0 & 4 (00011111) of ROM bank
}
// Switch data pins to intput
dataIn_GB();
if (bank > 1) {
romAddress = 0x4000;
}
// Blink led
PORTB ^= (1 << 4);
// Read up to 7FFF per bank
while (romAddress <= 0x7FFF) {
// Fill sdBuffer
myFile.read(sdBuffer, 512);
// Compare
for (int i = 0; i < 512; i++) {
if (readByte_GB(romAddress + i) != sdBuffer[i]) {
writeErrors++;
}
}
romAddress += 512;
}
}
// Close the file:
myFile.close();
if (writeErrors == 0) {
println_Msg(F("OK"));
display_Update();
}
else {
print_Msg(F("Error: "));
print_Msg(writeErrors);
println_Msg(F(" bytes "));
print_Error(F("did not verify."), false);
}
}
else {
println_Msg(F("Can't open file"));
display_Update();
}
return true;
}
#endif
//******************************************
// End of File
//******************************************
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