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V19D: Changed the way GBA roms are read
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sanni
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@ -2,8 +2,8 @@
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Cartridge Reader for Arduino Mega2560
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Author: sanni
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Date: 2016-09-21
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Version: V19C
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Date: 2016-09-27
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Version: V19D
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SD lib: https://github.com/greiman/SdFat
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LCD lib: https://github.com/adafruit/Adafruit_SSD1306
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@ -30,10 +30,10 @@
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zzattack - multigame pcb fix
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Pickle - SDD1 fix
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insidegadgets - GBCartRead
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lukeskaff - Nintendo DS GBA slot timing
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RobinTheHood - GameboyAdvanceRomDumper
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**********************************************************************************/
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char ver[5] = "V19C";
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char ver[5] = "V19D";
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/******************************************
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Define Output
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@ -7,6 +7,7 @@
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*****************************************/
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char calcChecksumStr[5];
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byte cartBuffer[512];
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boolean readType;
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const int nintendoLogo[] PROGMEM = {
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0x00, 0x00, 0x00, 0x00, 0x24, 0xFF, 0xAE, 0x51, 0x69, 0x9A, 0xA2, 0x21, 0x3D, 0x84, 0x82, 0x0A,
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@ -289,9 +290,6 @@ void gbaMenu() {
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void setup_GBA() {
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setROM_GBA();
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// Delay until all is stable
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delay(500);
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// Print start page
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getCartInfo_GBA();
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display_Clear();
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@ -343,128 +341,163 @@ void setROM_GBA() {
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PORTH |= (1 << 0) | (1 << 3) | (1 << 5) | (1 << 6);
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}
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// Read one word and toggle both CS and RD
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word readWord_GBA(unsigned long myAddress) {
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//divide address by two since we read two bytes per offset
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unsigned long currAddress = myAddress / 2;
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void setAddress_GBA(unsigned long myAddress) {
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// Switch CS_ROM(PH3) to HIGH
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PORTH |= (1 << 3);
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// Output address to address pins,
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PORTF = currAddress & 0xFF;
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PORTK = (currAddress >> 8) & 0xFF;
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PORTC = (currAddress >> 16) & 0xFF;
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// Switch RD(PH6) to HIGH
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PORTH |= (1 << 6);
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// Wait 30ns, Arduino running at 16Mhz -> one operation = 62.5ns
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__asm__("nop\n\t");
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// Pull CS_ROM(PH3) LOW to latch the address
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PORTH &= ~(1 << 3);
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// Wait 120ns between pulling CS and RD LOW
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__asm__("nop\n\t""nop\n\t");
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// Set address/data pins to LOW, this is important
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PORTF = 0x0;
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PORTK = 0x0;
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// Set address/data ports to input so we can read, but don't enable pullups
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DDRF = 0x0;
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DDRK = 0x0;
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// Pull RD(PH6) to LOW to read 16 bytes of data
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PORTH &= ~ (1 << 6);
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// Wait 120ns for the cartridge rom to write the data to the datalines
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__asm__("nop\n\t""nop\n\t");
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// Switch CS_ROM(PH3) RD(PH6) to HIGH
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PORTH |= (1 << 3) | (1 << 6);
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// Read the data off the data lines on the rising edge of the RD line.
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word tempWord = ((PINF << 8) + PINK) & 0xFFFF;
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// Set address/data pins to output
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// Set address/data ports to output
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DDRF = 0xFF;
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DDRK = 0xFF;
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DDRC = 0xFF;
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// Output a high signal so there are no floating pins
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// Output address to address pins,
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PORTF = (myAddress / 2) & 0xFF;
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PORTK = ((myAddress / 2) >> 8) & 0xFF;
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PORTC = ((myAddress / 2) >> 16) & 0xFF;
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// Pull CS(PH3) to LOW
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PORTH &= ~ (1 << 3);
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// Output a high signal
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PORTF = 0XFF;
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PORTK = 0XFF;
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PORTC = 0XFF;
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// Return the read word
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return tempWord;
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// Set address/data ports to input
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DDRF = 0x00;
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DDRK = 0x00;
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// Pull RD(PH6) to LOW
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PORTH &= ~ (1 << 6);
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}
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// Read multiple bytes into an array by toggling both CS and RD for each byte
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void readBlock_GBA(unsigned long myAddress, byte myArray[] , int numBytes) {
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// Read multiple bytes into an array toggle both CS and RD each time
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void readRand_GBA(unsigned long myAddress, byte myArray[] , int numBytes) {
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for (int currByte = 0; currByte < numBytes; currByte += 2) {
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unsigned long currAddress = myAddress + currByte;
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word currWord = readWord_GBA(currAddress);
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setAddress_GBA(myAddress + currByte);
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word currWord = ((PINF << 8) + PINK) & 0xFFFF;
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myArray[currByte] = (currWord >> 8) & 0xFF;
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myArray[currByte + 1] = currWord & 0xFF;
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}
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setROM_GBA();
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}
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// Read multiple bytes into an array but only toggle CS once
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void readSeq_GBA(byte myArray[] , int numBytes) {
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for (int currByte = 0; currByte < numBytes; currByte += 2) {
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word currWord = ((PINF << 8) + PINK) & 0xFFFF;
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myArray[currByte] = (currWord >> 8) & 0xFF;
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myArray[currByte + 1] = currWord & 0xFF;
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// Switch RD(PH6) to HIGH
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PORTH |= (1 << 6);
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// Pull RD(PH6) to LOW
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PORTH &= ~ (1 << 6);
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}
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}
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/******************************************
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Game Boy ROM Functions
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*****************************************/
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// Read info out of rom header
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void getCartInfo_GBA() {
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// Read Header into array
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readBlock_GBA(0, cartBuffer, 192);
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// Test known Nintendo header for errors and sets read method to either sequential or random access
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int testHeader() {
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// Set address to start of rom
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setAddress_GBA(0);
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// Read header into array sequentially
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readSeq_GBA(cartBuffer, 192);
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// Nintendo logo check
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// Check if Nintendo logo is read ok
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int logoErrors = checkLogo();
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if (logoErrors != 0) {
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// Nintendo logo has errors -> change read method
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setROM_GBA();
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setAddress_GBA(0);
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// Read Header into array in random access mode
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readRand_GBA(0, cartBuffer, 192);
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logoErrors = checkLogo();
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if (logoErrors == 0) {
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readType = 0;
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}
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}
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else {
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readType = 1;
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}
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return logoErrors;
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}
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// Compare Nintendo logo, 156 bytes starting at 0x04
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int checkLogo() {
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int errors = 0;
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for (int currByte = 0x4; currByte < 0xA0; currByte++) {
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if (pgm_read_byte(&nintendoLogo[currByte]) != cartBuffer[currByte]) {
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print_Error(F("Nintendo Logo Error"), false);
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errors++;
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}
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}
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return errors;
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}
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// Read info out of rom header
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void getCartInfo_GBA() {
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// Test rom header for errors
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int logoErrors = testHeader();
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if (logoErrors != 0) {
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print_Error(F("Nintendo Logo Error"), true);
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}
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else {
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// Get cart ID
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cartID[0] = char(cartBuffer[0xAC]);
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cartID[1] = char(cartBuffer[0xAD]);
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cartID[2] = char(cartBuffer[0xAE]);
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cartID[3] = char(cartBuffer[0xAF]);
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// Dump name into 8.3 compatible format
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byte myByte = 0;
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byte myLength = 0;
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for (int addr = 0xA0; addr <= 0xAB; addr++) {
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myByte = cartBuffer[addr];
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if (((char(myByte) >= 48 && char(myByte) <= 57) || (char(myByte) >= 65 && char(myByte) <= 122)) && myLength < 8) {
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romName[myLength] = char(myByte);
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myLength++;
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}
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}
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// Get ROM version
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romVersion = cartBuffer[0xBC];
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// Get Checksum as string
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sprintf(checksumStr, "%02X", cartBuffer[0xBD]);
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// Calculate Checksum
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int calcChecksum = 0x00;
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for (int n = 0xA0; n < 0xBD; n++) {
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calcChecksum -= cartBuffer[n];
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}
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calcChecksum = (calcChecksum - 0x19) & 0xFF;
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// Turn into string
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sprintf(calcChecksumStr, "%02X", calcChecksum);
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// Compare checksum
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if (strcmp(calcChecksumStr, checksumStr) != 0) {
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print_Msg(F("Result: "));
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println_Msg(calcChecksumStr);
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print_Error(F("Checksum Error"), false);
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println_Msg(F(""));
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println_Msg(F("Press Button..."));
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display_Update();
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wait();
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break;
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}
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}
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// Get cart ID
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cartID[0] = char(cartBuffer[0xAC]);
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cartID[1] = char(cartBuffer[0xAD]);
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cartID[2] = char(cartBuffer[0xAE]);
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cartID[3] = char(cartBuffer[0xAF]);
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// Dump name into 8.3 compatible format
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byte myByte = 0;
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byte myLength = 0;
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for (int addr = 0xA0; addr <= 0xAB; addr++) {
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myByte = cartBuffer[addr];
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if (((char(myByte) >= 48 && char(myByte) <= 57) || (char(myByte) >= 65 && char(myByte) <= 122)) && myLength < 8) {
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romName[myLength] = char(myByte);
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myLength++;
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}
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}
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// Get ROM version
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romVersion = cartBuffer[0xBC];
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// Get Checksum as string
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sprintf(checksumStr, "%02X", cartBuffer[0xBD]);
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// Calculate Checksum
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int calcChecksum = 0x00;
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for (int n = 0xA0; n < 0xBD; n++) {
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calcChecksum -= cartBuffer[n];
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}
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calcChecksum = (calcChecksum - 0x19) & 0xFF;
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// Turn into string
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sprintf(calcChecksumStr, "%02X", calcChecksum);
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// Compare checksum
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if (strcmp(calcChecksumStr, checksumStr) != 0) {
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print_Msg(F("Result: "));
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println_Msg(calcChecksumStr);
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print_Error(F("Checksum Error"), false);
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println_Msg(F(""));
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println_Msg(F("Press Button..."));
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display_Update();
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wait();
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}
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}
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// Dump ROM
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@ -495,16 +528,23 @@ void readROM_GBA() {
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print_Error(F("Can't create file on SD"), true);
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}
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// Set starting address
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setAddress_GBA(0);
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if (readType == 0) {
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setROM_GBA();
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}
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// Read rom
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for (int myAddress = 0; myAddress < cartSize; myAddress += 512) {
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// Fill sdBuffer starting at myAddress and reading 512 bytes
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readBlock_GBA(myAddress, sdBuffer, 512);
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// Read either sequentially or in random acces mode
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if (readType == 1)
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readSeq_GBA(sdBuffer, 512);
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else
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readRand_GBA(myAddress, sdBuffer, 512);
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// Write to SD
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myFile.write(sdBuffer, 512);
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// Pause between blocks, increase if you get errors every numBytes bytes
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delayMicroseconds(20);
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}
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// Close the file:
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@ -110,7 +110,7 @@ void snesMenu() {
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writeSRAM(0);
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unsigned long wrErrors = verifySRAM();
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if (wrErrors == 0) {
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println_Msg(F("Verified OK"));
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println_Msg(F("Restored OK"));
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display_Update();
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}
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else {
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