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cartreader/Cart_Reader/GBA.ino

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//******************************************
// GAME BOY ADVANCE
//******************************************
/******************************************
Variables
*****************************************/
char calcChecksumStr[5];
byte cartBuffer[512];
boolean readType;
const int nintendoLogo[] PROGMEM = {
0x00, 0x00, 0x00, 0x00, 0x24, 0xFF, 0xAE, 0x51, 0x69, 0x9A, 0xA2, 0x21, 0x3D, 0x84, 0x82, 0x0A,
0x84, 0xE4, 0x09, 0xAD, 0x11, 0x24, 0x8B, 0x98, 0xC0, 0x81, 0x7F, 0x21, 0xA3, 0x52, 0xBE, 0x19,
0x93, 0x09, 0xCE, 0x20, 0x10, 0x46, 0x4A, 0x4A, 0xF8, 0x27, 0x31, 0xEC, 0x58, 0xC7, 0xE8, 0x33,
0x82, 0xE3, 0xCE, 0xBF, 0x85, 0xF4, 0xDF, 0x94, 0xCE, 0x4B, 0x09, 0xC1, 0x94, 0x56, 0x8A, 0xC0,
0x13, 0x72, 0xA7, 0xFC, 0x9F, 0x84, 0x4D, 0x73, 0xA3, 0xCA, 0x9A, 0x61, 0x58, 0x97, 0xA3, 0x27,
0xFC, 0x03, 0x98, 0x76, 0x23, 0x1D, 0xC7, 0x61, 0x03, 0x04, 0xAE, 0x56, 0xBF, 0x38, 0x84, 0x00,
0x40, 0xA7, 0x0E, 0xFD, 0xFF, 0x52, 0xFE, 0x03, 0x6F, 0x95, 0x30, 0xF1, 0x97, 0xFB, 0xC0, 0x85,
0x60, 0xD6, 0x80, 0x25, 0xA9, 0x63, 0xBE, 0x03, 0x01, 0x4E, 0x38, 0xE2, 0xF9, 0xA2, 0x34, 0xFF,
0xBB, 0x3E, 0x03, 0x44, 0x78, 0x00, 0x90, 0xCB, 0x88, 0x11, 0x3A, 0x94, 0x65, 0xC0, 0x7C, 0x63,
0x87, 0xF0, 0x3C, 0xAF, 0xD6, 0x25, 0xE4, 0x8B, 0x38, 0x0A, 0xAC, 0x72, 0x21, 0xD4, 0xF8, 0x07
};
/******************************************
Menu
*****************************************/
// GBA menu items
const char GBAMenuItem1[] PROGMEM = "Read Rom";
const char GBAMenuItem2[] PROGMEM = "Read Save";
const char GBAMenuItem3[] PROGMEM = "Write Save";
const char GBAMenuItem4[] PROGMEM = "Reset";
const char* const menuOptionsGBA[] PROGMEM = {GBAMenuItem1, GBAMenuItem2, GBAMenuItem3, GBAMenuItem4};
// Rom menu
const char GBARomItem1[] PROGMEM = "4MB";
const char GBARomItem2[] PROGMEM = "8MB";
const char GBARomItem3[] PROGMEM = "16MB";
const char GBARomItem4[] PROGMEM = "32MB";
const char* const romOptionsGBA[] PROGMEM = {GBARomItem1, GBARomItem2, GBARomItem3, GBARomItem4};
// Save menu
const char GBASaveItem1[] PROGMEM = "4K EEPROM";
const char GBASaveItem2[] PROGMEM = "64K EEPROM";
const char GBASaveItem3[] PROGMEM = "256K SRAM/FRAM";
const char GBASaveItem4[] PROGMEM = "512K SRAM/FRAM";
const char GBASaveItem5[] PROGMEM = "512K FLASHROM";
const char GBASaveItem6[] PROGMEM = "1M FLASHROM";
const char* const saveOptionsGBA[] PROGMEM = {GBASaveItem1, GBASaveItem2, GBASaveItem3, GBASaveItem4, GBASaveItem5, GBASaveItem6};
void gbaMenu() {
// create menu with title and 4 options to choose from
unsigned char mainMenu;
// Copy menuOptions out of progmem
convertPgm(menuOptionsGBA, 4);
mainMenu = question_box("GBA Cart Reader", menuOptions, 4, 0);
// wait for user choice to come back from the question box menu
switch (mainMenu)
{
case 0:
// Read rom
// create submenu with title and 4 options to choose from
unsigned char GBARomMenu;
// Copy menuOptions out of progmem
convertPgm(romOptionsGBA, 4);
GBARomMenu = question_box("Select ROM size", menuOptions, 4, 0);
// wait for user choice to come back from the question box menu
switch (GBARomMenu)
{
case 0:
// 4MB
cartSize = 0x400000;
break;
case 1:
// 8MB
cartSize = 0x800000;
break;
case 2:
// 16MB
cartSize = 0x1000000;
break;
case 3:
// 32MB
cartSize = 0x2000000;
break;
}
display_Clear();
// Change working dir to root
sd.chdir("/");
readROM_GBA();
sd.chdir("/");
compare_checksum_GBA();
break;
case 1:
// Read save
// create submenu with title and 6 options to choose from
unsigned char GBASaveMenu;
// Copy menuOptions out of progmem
convertPgm(saveOptionsGBA, 6);
GBASaveMenu = question_box("Select save type", menuOptions, 6, 0);
// wait for user choice to come back from the question box menu
switch (GBASaveMenu)
{
case 0:
display_Clear();
sd.chdir("/");
// 4K EEPROM
print_Error(F("Not supported yet"), false);
setROM_GBA();
break;
case 1:
display_Clear();
sd.chdir("/");
// 64K EEPROM
print_Error(F("Not supported yet"), false);
setROM_GBA();
break;
case 2:
display_Clear();
sd.chdir("/");
// 256K SRAM/FRAM
readFRAM_GBA(32768);
setROM_GBA();
break;
case 3:
display_Clear();
sd.chdir("/");
// 512K SRAM/FRAM
readFRAM_GBA(65536);
setROM_GBA();
break;
case 4:
display_Clear();
sd.chdir("/");
// 512K FLASH
readFLASH_GBA(1, 65536, 0);
setROM_GBA();
break;
case 5:
display_Clear();
sd.chdir("/");
// 1M FLASH (divided into two banks)
switchBank_GBA(0x0);
setROM_GBA();
readFLASH_GBA(1, 65536, 0);
switchBank_GBA(0x1);
setROM_GBA();
readFLASH_GBA(0, 65536, 65536);
setROM_GBA();
break;
}
break;
case 2:
// Write save
// create submenu with title and 6 options to choose from
unsigned char GBASavesMenu;
// Copy menuOptions out of progmem
convertPgm(saveOptionsGBA, 6);
GBASavesMenu = question_box("Select save type", menuOptions, 6, 0);
// wait for user choice to come back from the question box menu
switch (GBASavesMenu)
{
case 0:
display_Clear();
sd.chdir("/");
// 4K EEPROM
print_Error(F("Not supported yet"), false);
setROM_GBA();
break;
case 1:
display_Clear();
sd.chdir("/");
// 64K EEPROM
print_Error(F("Not supported yet"), false);
setROM_GBA();
break;
case 2:
display_Clear();
sd.chdir("/");
// 256K SRAM/FRAM
// Change working dir to root
writeFRAM_GBA(1, 32768);
writeErrors = verifyFRAM_GBA(32768);
if (writeErrors == 0) {
println_Msg(F("Verified OK"));
display_Update();
}
else {
print_Msg(F("Error: "));
print_Msg(writeErrors);
println_Msg(F(" bytes "));
print_Error(F("did not verify."), false);
}
setROM_GBA();
break;
case 3:
display_Clear();
sd.chdir("/");
// 512K SRAM/FRAM
// Change working dir to root
writeFRAM_GBA(1, 65536);
writeErrors = verifyFRAM_GBA(65536);
if (writeErrors == 0) {
println_Msg(F("Verified OK"));
display_Update();
}
else {
print_Msg(F("Error: "));
print_Msg(writeErrors);
println_Msg(F(" bytes "));
print_Error(F("did not verify."), false);
}
setROM_GBA();
break;
case 4:
display_Clear();
sd.chdir("/");
// 512K FLASH
idFlash_GBA();
resetFLASH_GBA();
if (strcmp(flashid, "BFD4") != 0) {
println_Msg(F("Flashrom Type not supported"));
print_Msg(F("ID: "));
println_Msg(flashid);
print_Error(F(""), true);
}
eraseFLASH_GBA();
if (blankcheckFLASH_GBA(65536)) {
writeFLASH_GBA(1, 65536, 0);
verifyFLASH_GBA(65536, 0);
}
else {
print_Error(F("Erase failed"), false);
}
setROM_GBA();
break;
case 5:
display_Clear();
sd.chdir("/");
// 1M FLASH
idFlash_GBA();
resetFLASH_GBA();
if (strcmp(flashid, "C209") != 0) {
println_Msg(F("Flashrom Type not supported"));
print_Msg(F("ID: "));
println_Msg(flashid);
print_Error(F(""), true);
}
eraseFLASH_GBA();
// 131072 bytes are divided into two 65536 byte banks
switchBank_GBA(0x0);
setROM_GBA();
if (blankcheckFLASH_GBA(65536)) {
writeFLASH_GBA(1, 65536, 0);
verifyFLASH_GBA(65536, 0);
}
else {
print_Error(F("Erase failed"), false);
}
switchBank_GBA(0x1);
setROM_GBA();
if (blankcheckFLASH_GBA(65536)) {
writeFLASH_GBA(0, 65536, 65536);
verifyFLASH_GBA(65536, 65536);
}
else {
print_Error(F("Erase failed"), false);
}
setROM_GBA();
break;
}
break;
case 3:
asm volatile (" jmp 0");
break;
}
println_Msg(F(""));
println_Msg(F("Press Button..."));
display_Update();
wait();
}
/******************************************
Setup
*****************************************/
void setup_GBA() {
setROM_GBA();
// Print start page
getCartInfo_GBA();
display_Clear();
println_Msg(F("GBA Cart Info"));
println_Msg("");
print_Msg(F("Rom Name: "));
println_Msg(romName);
print_Msg(F("Cart ID: "));
println_Msg(cartID);
print_Msg(F("Checksum: "));
println_Msg(checksumStr);
print_Msg(F("Version: 1."));
println_Msg(romVersion);
println_Msg("");
// Wait for user input
println_Msg(F("Press Button..."));
display_Update();
wait();
}
/******************************************
Low level functions
*****************************************/
// Setup all ports and pins for reading the rom
void setROM_GBA() {
// Set address/data pins to OUTPUT
// AD0-AD7
DDRF = 0xFF;
// AD8-AD15
DDRK = 0xFF;
// AD16-AD23
DDRC = 0xFF;
// Output a HIGH signal
// AD0-AD7
PORTF = 0xFF;
// AD8-AD15
PORTK = 0xFF;
// AD16-AD23
PORTC = 0xFF;
// Set Control Pins to Output CS_SRAM(PH0) CS_ROM(PH3) WR(PH5) RD(PH6)
// CLK is N/C and IRQ is conected to GND inside the cartridge
DDRH |= (1 << 0) | (1 << 3) | (1 << 5) | (1 << 6);
// Output a high signal on CS_SRAM(PH0) CS_ROM(PH3) WR(PH5) RD(PH6)
// At power-on all the control lines are high/disabled
PORTH |= (1 << 0) | (1 << 3) | (1 << 5) | (1 << 6);
// Wait until all is stable
delay(500);
}
void setAddress_GBA(unsigned long myAddress) {
// Switch CS_ROM(PH3) to HIGH
PORTH |= (1 << 3);
// Switch RD(PH6) to HIGH
PORTH |= (1 << 6);
// Set address/data ports to output
DDRF = 0xFF;
DDRK = 0xFF;
DDRC = 0xFF;
// Output address to address pins,
PORTF = (myAddress / 2) & 0xFF;
PORTK = ((myAddress / 2) >> 8) & 0xFF;
PORTC = ((myAddress / 2) >> 16) & 0xFF;
// Pull CS(PH3) to LOW
PORTH &= ~ (1 << 3);
// Output a high signal
PORTF = 0XFF;
PORTK = 0XFF;
PORTC = 0XFF;
// Set address/data ports to input
DDRF = 0x00;
DDRK = 0x00;
// Pull RD(PH6) to LOW
PORTH &= ~ (1 << 6);
}
// Read multiple bytes into an array toggle both CS and RD each time
void readRand_GBA(unsigned long myAddress, byte myArray[] , int numBytes) {
for (int currByte = 0; currByte < numBytes; currByte += 2) {
setAddress_GBA(myAddress + currByte);
word currWord = ((PINF << 8) + PINK) & 0xFFFF;
myArray[currByte] = (currWord >> 8) & 0xFF;
myArray[currByte + 1] = currWord & 0xFF;
}
// setROM_GBA without delay
// Set address/data pins to OUTPUT
// AD0-AD7
DDRF = 0xFF;
// AD8-AD15
DDRK = 0xFF;
// AD16-AD23
DDRC = 0xFF;
// Output a HIGH signal
// AD0-AD7
PORTF = 0xFF;
// AD8-AD15
PORTK = 0xFF;
// AD16-AD23
PORTC = 0xFF;
// Set Control Pins to Output CS_SRAM(PH0) CS_ROM(PH3) WR(PH5) RD(PH6)
// CLK is N/C and IRQ is conected to GND inside the cartridge
DDRH |= (1 << 0) | (1 << 3) | (1 << 5) | (1 << 6);
// Output a high signal on CS_SRAM(PH0) CS_ROM(PH3) WR(PH5) RD(PH6)
// At power-on all the control lines are high/disabled
PORTH |= (1 << 0) | (1 << 3) | (1 << 5) | (1 << 6);
}
// Read multiple bytes into an array but only toggle CS once
void readSeq_GBA(byte myArray[] , int numBytes) {
for (int currByte = 0; currByte < numBytes; currByte += 2) {
word currWord = ((PINF << 8) + PINK) & 0xFFFF;
myArray[currByte] = (currWord >> 8) & 0xFF;
myArray[currByte + 1] = currWord & 0xFF;
// Switch RD(PH6) to HIGH
PORTH |= (1 << 6);
// Pull RD(PH6) to LOW
PORTH &= ~ (1 << 6);
}
}
/******************************************
Game Boy ROM Functions
*****************************************/
// Test known Nintendo header for errors and sets read method to either sequential or random access
int testHeader() {
// Set address to start of rom
setAddress_GBA(0);
// Read header into array sequentially
readSeq_GBA(cartBuffer, 192);
// Reset ports or the 1st maskrom byte on eeprom carts won't be read correctly
setROM_GBA();
// Check if Nintendo logo is read ok
int logoErrors = checkLogo();
if (logoErrors != 0) {
// Nintendo logo has errors -> change read method
setROM_GBA();
setAddress_GBA(0);
// Read Header into array in random access mode
readRand_GBA(0, cartBuffer, 192);
logoErrors = checkLogo();
if (logoErrors == 0) {
readType = 0;
}
}
else {
readType = 1;
}
return logoErrors;
}
// Compare Nintendo logo, 156 bytes starting at 0x04
int checkLogo() {
int errors = 0;
for (int currByte = 0x4; currByte < 0xA0; currByte++) {
if (pgm_read_byte(&nintendoLogo[currByte]) != cartBuffer[currByte]) {
errors++;
}
}
return errors;
}
// Read info out of rom header
void getCartInfo_GBA() {
// Test rom header for errors
int logoErrors = testHeader();
if (logoErrors != 0) {
print_Error(F("Nintendo Logo Error"), true);
}
else {
// Get cart ID
cartID[0] = char(cartBuffer[0xAC]);
cartID[1] = char(cartBuffer[0xAD]);
cartID[2] = char(cartBuffer[0xAE]);
cartID[3] = char(cartBuffer[0xAF]);
// Dump name into 8.3 compatible format
byte myByte = 0;
byte myLength = 0;
for (int addr = 0xA0; addr <= 0xAB; addr++) {
myByte = cartBuffer[addr];
if (((char(myByte) >= 48 && char(myByte) <= 57) || (char(myByte) >= 65 && char(myByte) <= 122)) && myLength < 8) {
romName[myLength] = char(myByte);
myLength++;
}
}
// Get ROM version
romVersion = cartBuffer[0xBC];
// Get Checksum as string
sprintf(checksumStr, "%02X", cartBuffer[0xBD]);
// Calculate Checksum
int calcChecksum = 0x00;
for (int n = 0xA0; n < 0xBD; n++) {
calcChecksum -= cartBuffer[n];
}
calcChecksum = (calcChecksum - 0x19) & 0xFF;
// Turn into string
sprintf(calcChecksumStr, "%02X", calcChecksum);
// Compare checksum
if (strcmp(calcChecksumStr, checksumStr) != 0) {
print_Msg(F("Result: "));
println_Msg(calcChecksumStr);
print_Error(F("Checksum Error"), false);
println_Msg(F(""));
println_Msg(F("Press Button..."));
display_Update();
wait();
}
}
}
// Dump ROM
void readROM_GBA() {
// Get name, add extension and convert to char array for sd lib
char fileName[26];
strcpy(fileName, romName);
strcat(fileName, ".gba");
// create a new folder for the rom file
EEPROM_readAnything(0, foldern);
sprintf(folder, "ROM/%s/%d", romName, foldern);
sd.mkdir(folder, true);
sd.chdir(folder);
//clear the screen
display_Clear();
println_Msg(F("Reading to: "));
println_Msg(folder);
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);
}
// Set starting address
setAddress_GBA(0);
if (readType == 0) {
setROM_GBA();
}
// Read rom
for (int myAddress = 0; myAddress < cartSize; myAddress += 512) {
// Read either sequentially or in random acces mode
if (readType == 1)
readSeq_GBA(sdBuffer, 512);
else
readRand_GBA(myAddress, sdBuffer, 512);
// Write to SD
myFile.write(sdBuffer, 512);
}
// Close the file:
myFile.close();
// Signal end of process
print_Msg(F("Saved as "));
println_Msg(fileName);
}
// Calculate the checksum of the dumped rom
boolean compare_checksum_GBA () {
println_Msg(F("Calculating Checksum"));
display_Update();
char fileName[26];
strcpy(fileName, romName);
strcat(fileName, ".gba");
// last used rom folder
EEPROM_readAnything(0, foldern);
sprintf(folder, "ROM/%s/%d", romName, foldern - 1);
sd.chdir(folder);
// If file exists
if (myFile.open(fileName, O_READ)) {
// Read rom header
myFile.read(sdBuffer, 512);
myFile.close();
// Calculate Checksum
int calcChecksum = 0x00;
for (int n = 0xA0; n < 0xBD; n++) {
calcChecksum -= sdBuffer[n];
}
calcChecksum = (calcChecksum - 0x19) & 0xFF;
// Turn into string
sprintf(calcChecksumStr, "%02X", calcChecksum);
if (strcmp(calcChecksumStr, checksumStr) == 0) {
println_Msg(F("Checksum matches"));
display_Update();
return 1;
}
else {
print_Msg(F("Result: "));
println_Msg(calcChecksumStr);
print_Error(F("Checksum Error"), false);
return 0;
}
}
// Else show error
else {
print_Error(F("Failed to open rom"), false);
return 0;
}
}
/******************************************
GBA FRAM SAVE Functions
*****************************************/
// MB85R256 FRAM (Ferroelectric Random Access Memory) 32,768 words x 8 bits
void readFRAM_GBA (unsigned long framSize) {
// Output a HIGH signal on CS_ROM(PH3) WE_SRAM(PH5)
PORTH |= (1 << 3) | (1 << 5);
// Set address ports to output
DDRF = 0xFF;
DDRK = 0xFF;
// Set data pins to input
DDRC = 0x00;
// Disable Pullups
//PORTC = 0x00;
// Output a LOW signal on CE_SRAM(PH0) and OE_SRAM(PH6)
PORTH &= ~((1 << 0) | (1 << 6));
// Get name, add extension and convert to char array for sd lib
strcpy(fileName, romName);
strcat(fileName, ".srm");
// create a new folder for the save file
EEPROM_readAnything(0, foldern);
sprintf(folder, "SAVE/%s/%d", romName, foldern);
sd.mkdir(folder, true);
sd.chdir(folder);
// Signal end of process
print_Msg(F("Reading to SAVE/"));
print_Msg(romName);
print_Msg(F("/"));
print_Msg(foldern);
print_Msg(F("/"));
print_Msg(fileName);
print_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("SD Error"), true);
}
for (unsigned long currAddress = 0; currAddress < framSize; currAddress += 512) {
for (int c = 0; c < 512; c++) {
// Pull OE_SRAM(PH6) HIGH
PORTH |= (1 << 6);
// Set address
PORTF = (currAddress + c) & 0xFF;
PORTK = ((currAddress + c) >> 8) & 0xFF;
// Arduino running at 16Mhz -> one nop = 62.5ns
// Leave CS_SRAM HIGH for at least 85ns
__asm__("nop\n\t""nop\n\t");
// Pull OE_SRAM(PH6) LOW
PORTH &= ~ (1 << 6);
// Hold address for at least 25ns and wait 150ns before access
__asm__("nop\n\t""nop\n\t""nop\n\t");
// Read byte
sdBuffer[c] = PINC;
}
// Write sdBuffer to file
myFile.write(sdBuffer, 512);
}
// Close the file:
myFile.close();
// Signal end of process
println_Msg(F("Done"));
display_Update();
}
// Write file to SRAM
void writeFRAM_GBA (boolean browseFile, unsigned long framSize) {
// Output a HIGH signal on CS_ROM(PH3) and OE_SRAM(PH6)
PORTH |= (1 << 3) | (1 << 6);
// Set address ports to output
DDRF = 0xFF;
DDRK = 0xFF;
// Set data port to output
DDRC = 0xFF;
// Output a high signal
//PORTC = 0xFF;
// Output a LOW signal on CE_SRAM(PH0) and WE_SRAM(PH5)
PORTH &= ~((1 << 0) | (1 << 5));
if (browseFile) {
filePath[0] = '\0';
sd.chdir("/");
fileBrowser("Select srm file");
// Create filepath
sprintf(filePath, "%s/%s", filePath, fileName);
display_Clear();
}
else
sprintf(filePath, "%s", fileName);
//open file on sd card
if (myFile.open(filePath, O_READ)) {
for (unsigned long currAddress = 0; currAddress < framSize; currAddress += 512) {
//fill sdBuffer
myFile.read(sdBuffer, 512);
for (int c = 0; c < 512; c++) {
// Output Data on PORTC
PORTC = sdBuffer[c];
// Arduino running at 16Mhz -> one nop = 62.5ns
// Data setup time 50ns
__asm__("nop\n\t");
// Pull WE_SRAM (PH5) HIGH
PORTH |= (1 << 5);
// Set address
PORTF = (currAddress + c) & 0xFF;
PORTK = ((currAddress + c) >> 8) & 0xFF;
// Leave WE_SRAM (PH5) HIGH for at least 85ns
__asm__("nop\n\t""nop\n\t");
// Pull WE_SRAM (PH5) LOW
PORTH &= ~ (1 << 5);
// Hold address for at least 25ns and wait 150ns before next write
__asm__("nop\n\t""nop\n\t""nop\n\t");
}
}
// Close the file:
myFile.close();
println_Msg(F("SRAM writing finished"));
display_Update();
}
else {
print_Error(F("File doesnt exist"), false);
}
}
// Check if the SRAM was written without any error
unsigned long verifyFRAM_GBA(unsigned long framSize) {
// Output a HIGH signal on CS_ROM(PH3) WE_SRAM(PH5)
PORTH |= (1 << 3) | (1 << 5);
// Set address ports to output
DDRF = 0xFF;
DDRK = 0xFF;
// Set data pins to input
DDRC = 0x00;
// Disable Pullups
//PORTC = 0x00;
// Output a LOW signal on CE_SRAM(PH0) and OE_SRAM(PH6)
PORTH &= ~((1 << 0) | (1 << 6));
//open file on sd card
if (myFile.open(filePath, O_READ)) {
// Variable for errors
writeErrors = 0;
for (unsigned long currAddress = 0; currAddress < framSize; currAddress += 512) {
//fill sdBuffer
myFile.read(sdBuffer, 512);
for (int c = 0; c < 512; c++) {
// Pull OE_SRAM(PH6) HIGH
PORTH |= (1 << 6);
// Set address
PORTF = (currAddress + c) & 0xFF;
PORTK = ((currAddress + c) >> 8) & 0xFF;
// Arduino running at 16Mhz -> one nop = 62.5ns
// Leave CS_SRAM HIGH for at least 85ns
__asm__("nop\n\t""nop\n\t");
// Pull OE_SRAM(PH6) LOW
PORTH &= ~ (1 << 6);
// Hold address for at least 25ns and wait 150ns before access
__asm__("nop\n\t""nop\n\t""nop\n\t");
// Read byte
if (PINC != sdBuffer[c]) {
writeErrors++;
}
}
}
// Close the file:
myFile.close();
return writeErrors;
}
else {
print_Error(F("Can't open file"), false);
}
}
/******************************************
GBA FLASH SAVE Functions
*****************************************/
// SST 39VF512 Flashrom
void idFlash_GBA() {
// Output a HIGH signal on CS_ROM(PH3) WE_FLASH(PH5) and OE_FLASH(PH6)
PORTH |= (1 << 3) | (1 << 5) | (1 << 6);
// Set address ports to output
DDRF = 0xFF;
DDRK = 0xFF;
// Set data pins to output
DDRC = 0xFF;
// Output a LOW signal on CE_FLASH(PH0)
PORTH &= ~(1 << 0);
// ID command sequence
writeByteFlash_GBA(0x5555, 0xaa);
writeByteFlash_GBA(0x2aaa, 0x55);
writeByteFlash_GBA(0x5555, 0x90);
// Set data pins to input
DDRC = 0x00;
// Output a LOW signal on OE_FLASH(PH6)
PORTH &= ~(1 << 6);
// Wait 150ns before reading ID
// Arduino running at 16Mhz -> one nop = 62.5ns
__asm__("nop\n\t""nop\n\t""nop\n\t");
// Read the two id bytes into a string
sprintf(flashid, "%02X%02X", readByteFlash_GBA(0), readByteFlash_GBA(1));
// Set CS_FLASH(PH0) high
PORTH |= (1 << 0);
}
// Reset FLASH
void resetFLASH_GBA() {
// Output a HIGH signal on CS_ROM(PH3) WE_FLASH(PH5) and OE_FLASH(PH6)
PORTH |= (1 << 3) | (1 << 5) | (1 << 6);
// Set address ports to output
DDRF = 0xFF;
DDRK = 0xFF;
// Set data pins to output
DDRC = 0xFF;
// Output a LOW signal on CE_FLASH(PH0)
PORTH &= ~(1 << 0);
// Reset command sequence
writeByteFlash_GBA(0x5555, 0xAA);
writeByteFlash_GBA(0x2AAA, 0x55);
writeByteFlash_GBA(0x5555, 0xf0);
writeByteFlash_GBA(0x5555, 0xf0);
// Set CS_FLASH(PH0) high
PORTH |= (1 << 0);
// Wait
delay(100);
}
byte readByteFlash_GBA(unsigned long myAddress) {
// Set address
PORTF = myAddress & 0xFF;
PORTK = (myAddress >> 8) & 0xFF;
// Wait until byte is ready to read
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Read byte
byte tempByte = PINC;
// Arduino running at 16Mhz -> one nop = 62.5ns
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
return tempByte;
}
void writeByteFlash_GBA(unsigned long myAddress, byte 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");
// Switch WE_FLASH(PH5) to LOW
PORTH &= ~(1 << 5);
// Leave WE low for at least 40ns
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Switch WE_FLASH(PH5) to HIGH
PORTH |= (1 << 5);
// Leave WE high for a bit
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
}
// Erase FLASH
void eraseFLASH_GBA() {
// Output a HIGH signal on CS_ROM(PH3) WE_FLASH(PH5) and OE_FLASH(PH6)
PORTH |= (1 << 3) | (1 << 5) | (1 << 6);
// Set address ports to output
DDRF = 0xFF;
DDRK = 0xFF;
// Set data pins to output
DDRC = 0xFF;
// Output a LOW signal on CE_FLASH(PH0)
PORTH &= ~(1 << 0);
// Erase command sequence
writeByteFlash_GBA(0x5555, 0xaa);
writeByteFlash_GBA(0x2aaa, 0x55);
writeByteFlash_GBA(0x5555, 0x80);
writeByteFlash_GBA(0x5555, 0xaa);
writeByteFlash_GBA(0x2aaa, 0x55);
writeByteFlash_GBA(0x5555, 0x10);
// Set CS_FLASH(PH0) high
PORTH |= (1 << 0);
// Wait until all is erased
delay(500);
}
boolean blankcheckFLASH_GBA (unsigned long flashSize) {
// Output a HIGH signal on CS_ROM(PH3) WE_FLASH(PH5)
PORTH |= (1 << 3) | (1 << 5);
// Set address ports to output
DDRF = 0xFF;
DDRK = 0xFF;
// Set address to 0
PORTF = 0x00;
PORTK = 0x00;
// Set data pins to input
DDRC = 0x00;
// Disable Pullups
//PORTC = 0x00;
boolean blank = 1;
// Output a LOW signal on CE_FLASH(PH0)
PORTH &= ~(1 << 0);
// Output a LOW signal on OE_FLASH(PH6)
PORTH &= ~(1 << 6);
for (unsigned long currAddress = 0; currAddress < flashSize; currAddress += 512) {
// Fill buffer
for (int c = 0; c < 512; c++) {
// Read byte
sdBuffer[c] = readByteFlash_GBA(currAddress + c);
}
// Check buffer
for (unsigned long currByte = 0; currByte < 512; currByte++) {
if (sdBuffer[currByte] != 0xFF) {
currByte = 512;
currAddress = flashSize;
blank = 0;
}
}
}
// Set CS_FLASH(PH0) high
PORTH |= (1 << 0);
return blank;
}
// The MX29L010 is 131072 bytes in size and has 16 sectors per bank
// each sector is 4096 bytes, there are 32 sectors total
// therefore the bank size is 65536 bytes, so we have two banks in total
void switchBank_GBA(byte bankNum) {
// Output a HIGH signal on CS_ROM(PH3) WE_FLASH(PH5) and OE_FLASH(PH6)
PORTH |= (1 << 3) | (1 << 5) | (1 << 6);
// Set address ports to output
DDRF = 0xFF;
DDRK = 0xFF;
// Set data pins to output
DDRC = 0xFF;
// Output a LOW signal on CE_FLASH(PH0)
PORTH &= ~(1 << 0);
// Switch bank command sequence
writeByteFlash_GBA(0x5555, 0xAA);
writeByteFlash_GBA(0x2AAA, 0x55);
writeByteFlash_GBA(0x5555, 0xB0);
writeByteFlash_GBA(0x0000, bankNum);
// Set CS_FLASH(PH0) high
PORTH |= (1 << 0);
}
void readFLASH_GBA (boolean browseFile, unsigned long flashSize, uint32_t pos) {
// Output a HIGH signal on CS_ROM(PH3) WE_FLASH(PH5)
PORTH |= (1 << 3) | (1 << 5);
// Set address ports to output
DDRF = 0xFF;
DDRK = 0xFF;
// Set address to 0
PORTF = 0x00;
PORTK = 0x00;
// Set data pins to input
DDRC = 0x00;
// Disable Pullups
//PORTC = 0x00;
if (browseFile) {
// Get name, add extension and convert to char array for sd lib
strcpy(fileName, romName);
strcat(fileName, ".fla");
// create a new folder for the save file
EEPROM_readAnything(0, foldern);
sprintf(folder, "SAVE/%s/%d", romName, foldern);
sd.mkdir(folder, true);
sd.chdir(folder);
// Signal end of process
print_Msg(F("Reading to SAVE/"));
print_Msg(romName);
print_Msg(F("/"));
print_Msg(foldern);
print_Msg(F("/"));
print_Msg(fileName);
print_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("SD Error"), true);
}
// Seek to a new position in the file
if (pos != 0)
myFile.seekCur(pos);
// Output a LOW signal on CE_FLASH(PH0)
PORTH &= ~(1 << 0);
// Output a LOW signal on OE_FLASH(PH6)
PORTH &= ~(1 << 6);
for (unsigned long currAddress = 0; currAddress < flashSize; currAddress += 512) {
for (int c = 0; c < 512; c++) {
// Read byte
sdBuffer[c] = readByteFlash_GBA(currAddress + c);
}
// Write sdBuffer to file
myFile.write(sdBuffer, 512);
}
myFile.close();
// Set CS_FLASH(PH0) high
PORTH |= (1 << 0);
// Signal end of process
println_Msg(F("Done"));
display_Update();
}
void busyCheck_GBA(int currByte) {
// Set data pins to input
DDRC = 0x00;
// Output a LOW signal on OE_FLASH(PH6)
PORTH &= ~(1 << 6);
// Read PINC
while (PINC != sdBuffer[currByte]) {}
// Output a HIGH signal on OE_FLASH(PH6)
PORTH |= (1 << 6);
// Set data pins to output
DDRC = 0xFF;
}
void writeFLASH_GBA (boolean browseFile, unsigned long flashSize, uint32_t pos) {
// Output a HIGH signal on CS_ROM(PH3) WE_FLASH(PH5) and OE_FLASH(PH6)
PORTH |= (1 << 3) | (1 << 5) | (1 << 6);
// Set address ports to output
DDRF = 0xFF;
DDRK = 0xFF;
// Set data port to output
DDRC = 0xFF;
if (browseFile) {
filePath[0] = '\0';
sd.chdir("/");
fileBrowser("Select fla file");
// Create filepath
sprintf(filePath, "%s/%s", filePath, fileName);
display_Clear();
}
print_Msg(F("Writing flash..."));
display_Update();
//open file on sd card
if (myFile.open(filePath, O_READ)) {
// Seek to a new position in the file
if (pos != 0)
myFile.seekCur(pos);
// Output a LOW signal on CE_FLASH(PH0)
PORTH &= ~(1 << 0);
for (unsigned long currAddress = 0; currAddress < flashSize; currAddress += 512) {
//fill sdBuffer
myFile.read(sdBuffer, 512);
for (int c = 0; c < 512; c++) {
// Write command sequence
writeByteFlash_GBA(0x5555, 0xaa);
writeByteFlash_GBA(0x2aaa, 0x55);
writeByteFlash_GBA(0x5555, 0xa0);
// Write current byte
writeByteFlash_GBA(currAddress + c, sdBuffer[c]);
// Wait
busyCheck_GBA(c);
}
}
// Set CS_FLASH(PH0) high
PORTH |= (1 << 0);
// Close the file:
myFile.close();
println_Msg(F("done"));
display_Update();
}
else {
println_Msg(F("Error"));
print_Error(F("File doesnt exist"), false);
}
}
// Check if the SRAM was written without any error
void verifyFLASH_GBA(unsigned long flashSize, uint32_t pos) {
// Output a HIGH signal on CS_ROM(PH3) WE_FLASH(PH5)
PORTH |= (1 << 3) | (1 << 5);
// Set address ports to output
DDRF = 0xFF;
DDRK = 0xFF;
// Set data pins to input
DDRC = 0x00;
// Output a LOW signal on CE_FLASH(PH0) and OE_FLASH(PH6)
PORTH &= ~((1 << 0) | (1 << 6));
// Signal beginning of process
print_Msg(F("Verify..."));
display_Update();
unsigned long wrError = 0;
//open file on sd card
if (!myFile.open(filePath, O_READ)) {
print_Error(F("SD Error"), true);
}
// Seek to a new position in the file
if (pos != 0)
myFile.seekCur(pos);
for (unsigned long currAddress = 0; currAddress < flashSize; currAddress += 512) {
myFile.read(sdBuffer, 512);
for (int c = 0; c < 512; c++) {
// Read byte
if (sdBuffer[c] != readByteFlash_GBA(currAddress + c)) {
wrError++;
}
}
}
myFile.close();
// Set CS_FLASH(PH0) high
PORTH |= (1 << 0);
if (wrError == 0) {
println_Msg(F("OK"));
}
else {
print_Msg(wrError);
print_Error(F(" Errors"), false);
}
}
//******************************************
// End of File
//******************************************
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