mirror of
https://github.com/sanni/cartreader.git
synced 2024-11-24 05:29:17 +01:00
Filter out 0xFF checksum
This commit is contained in:
sanni
parent
9d4336741e
commit
e80866a5ff
@ -212,7 +212,7 @@ static const char* const menuOptionsNESChips[] PROGMEM = {nesChipsMenuItem1, nes
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void nesMenu() {
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// create menu with title "NES CART READER" and 5 options to choose from
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convertPgm(menuOptionsNES, 7);
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unsigned char answer = question_box(F("NES CART READER"), menuOptions, 7, 1);
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unsigned char answer = question_box(F("NES CART READER"), menuOptions, 7, 0);
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// wait for user choice to come back from the question box menu
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switch (answer) {
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@ -424,149 +424,154 @@ boolean getMapping() {
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char iNES_STR[33];
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sprintf(crcStr, "%08lX", ~oldcrc32);
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// Search in database
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//Search for CRC32 in file
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char gamename[100];
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char crc_search[9];
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//go to root
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sd.chdir();
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if (myFile.open("nes.txt", O_READ)) {
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//Search for same CRC in list
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while (myFile.available()) {
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// Read game name
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get_line(gamename, &myFile, 96);
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// Read CRC32 checksum
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sprintf(checksumStr, "%c", myFile.read());
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for (byte i = 0; i < 7; i++) {
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sprintf(tempStr2, "%c", myFile.read());
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strcat(checksumStr, tempStr2);
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}
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// Skip over semicolon
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myFile.seekSet(myFile.curPosition() + 1);
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// Read CRC32 of first 16 bytes
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sprintf(crc_search, "%c", myFile.read());
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for (byte i = 0; i < 7; i++) {
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sprintf(tempStr2, "%c", myFile.read());
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strcat(crc_search, tempStr2);
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}
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// Skip over semicolon
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myFile.seekSet(myFile.curPosition() + 1);
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// Read iNES header
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get_line(iNES_STR, &myFile, 33);
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//Skip every 3rd line
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skip_line(&myFile);
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//if checksum search successful set mapper and end search
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if (strcmp(crc_search, crcStr) == 0) {
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// Close the file:
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myFile.close();
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// Convert "4E4553" to (0x4E, 0x45, 0x53)
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byte iNES_BUF[2];
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for (byte j = 0; j < 16; j++) {
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sscanf(iNES_STR + j * 2, "%2X", iNES_BUF);
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iNES_HEADER[j] = iNES_BUF[0];
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}
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// Convert iNES garbage to useful info (thx to fceux)
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mapper = (iNES_HEADER[6] >> 4);
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mapper |= (iNES_HEADER[7] & 0xF0);
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mapper |= ((iNES_HEADER[8] & 0x0F) << 8);
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// Check if it's a supported mapper
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boolean validMapper = 0;
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byte mapcount = (sizeof(mapsize) / sizeof(mapsize[0])) / 7;
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for (byte currMaplist = 0; currMaplist < mapcount; currMaplist++) {
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if (pgm_read_byte(mapsize + currMaplist * 7) == mapper)
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validMapper = 1;
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}
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if (!validMapper) {
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println_Msg(F("Mapper not supported"));
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return 0;
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break;
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}
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// Save Mapper
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EEPROM_writeAnything(7, mapper);
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// PRG size
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if ((iNES_HEADER[9] & 0x0F) != 0x0F) {
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// simple notation
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prgsize = (iNES_HEADER[4] | ((iNES_HEADER[9] & 0x0F) << 8)); //*16
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}
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else {
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// exponent-multiplier notation
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prgsize = (((1 << (iNES_HEADER[4] >> 2)) * ((iNES_HEADER[4] & 0b11) * 2 + 1)) >> 14); //*16
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}
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if (prgsize != 0)
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prgsize = (int(log(prgsize) / log(2)));
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EEPROM_writeAnything(8, prgsize);
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// CHR size
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if ((iNES_HEADER[9] & 0xF0) != 0xF0) {
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// simple notation
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chrsize = (uppow2(iNES_HEADER[5] | ((iNES_HEADER[9] & 0xF0) << 4))) * 2; //*4
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}
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else {
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chrsize = (((1 << (iNES_HEADER[5] >> 2)) * ((iNES_HEADER[5] & 0b11) * 2 + 1)) >> 13) * 2; //*4
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}
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if (chrsize != 0)
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chrsize = (int(log(chrsize) / log(2)));
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EEPROM_writeAnything(9, chrsize);
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// RAM size
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ramsize = ((iNES_HEADER[10] & 0xF0) ? (64 << ((iNES_HEADER[10] & 0xF0) >> 4)) : 0) / 4096; //*4
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if (ramsize != 0)
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ramsize = (int(log(ramsize) / log(2)));
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EEPROM_writeAnything(10, ramsize);
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// Get name
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byte myLength = 0;
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for (unsigned int i = 0; i < 20; i++) {
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// Stop at first "(" to remove "(Country)"
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if (char(gamename[i]) == 40) {
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break;
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}
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if (((char(gamename[i]) >= 48 && char(gamename[i]) <= 57) || (char(gamename[i]) >= 65 && char(gamename[i]) <= 90) || (char(gamename[i]) >= 97 && char(gamename[i]) <= 122)) && (myLength < 15)) {
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romName[myLength] = char(gamename[i]);
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myLength++;
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}
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}
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// If name consists out of all japanese characters use CART as name
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if (myLength == 0) {
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romName[0] = 'C';
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romName[1] = 'A';
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romName[2] = 'R';
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romName[3] = 'T';
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}
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// Print name
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display_Clear();
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println_Msg(romName);
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display_Update();
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return 1;
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break;
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}
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}
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// File searched until end but nothing found
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if (strcmp(crc_search, crcStr) != 0) {
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println_Msg(F("Not found"));
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return 0;
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}
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// Filter out 0xFF checksum
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if (strcmp(crcStr, "BD7BC39F") == 0) {
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return 0;
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}
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else {
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println_Msg(F("Database file not found"));
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return 0;
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//Search for CRC32 in file
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char gamename[100];
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char crc_search[9];
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//go to root
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sd.chdir();
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if (myFile.open("nes.txt", O_READ)) {
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//Search for same CRC in list
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while (myFile.available()) {
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// Read game name
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get_line(gamename, &myFile, 96);
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// Read CRC32 checksum
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sprintf(checksumStr, "%c", myFile.read());
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for (byte i = 0; i < 7; i++) {
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sprintf(tempStr2, "%c", myFile.read());
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strcat(checksumStr, tempStr2);
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}
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// Skip over semicolon
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myFile.seekSet(myFile.curPosition() + 1);
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// Read CRC32 of first 16 bytes
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sprintf(crc_search, "%c", myFile.read());
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for (byte i = 0; i < 7; i++) {
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sprintf(tempStr2, "%c", myFile.read());
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strcat(crc_search, tempStr2);
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}
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// Skip over semicolon
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myFile.seekSet(myFile.curPosition() + 1);
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// Read iNES header
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get_line(iNES_STR, &myFile, 33);
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//Skip every 3rd line
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skip_line(&myFile);
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//if checksum search successful set mapper and end search
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if (strcmp(crc_search, crcStr) == 0) {
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// Close the file:
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myFile.close();
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// Convert "4E4553" to (0x4E, 0x45, 0x53)
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byte iNES_BUF[2];
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for (byte j = 0; j < 16; j++) {
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sscanf(iNES_STR + j * 2, "%2X", iNES_BUF);
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iNES_HEADER[j] = iNES_BUF[0];
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}
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// Convert iNES garbage to useful info (thx to fceux)
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mapper = (iNES_HEADER[6] >> 4);
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mapper |= (iNES_HEADER[7] & 0xF0);
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mapper |= ((iNES_HEADER[8] & 0x0F) << 8);
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// Check if it's a supported mapper
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boolean validMapper = 0;
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byte mapcount = (sizeof(mapsize) / sizeof(mapsize[0])) / 7;
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for (byte currMaplist = 0; currMaplist < mapcount; currMaplist++) {
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if (pgm_read_byte(mapsize + currMaplist * 7) == mapper)
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validMapper = 1;
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}
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if (!validMapper) {
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println_Msg(F("Mapper not supported"));
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return 0;
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break;
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}
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// Save Mapper
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EEPROM_writeAnything(7, mapper);
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// PRG size
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if ((iNES_HEADER[9] & 0x0F) != 0x0F) {
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// simple notation
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prgsize = (iNES_HEADER[4] | ((iNES_HEADER[9] & 0x0F) << 8)); //*16
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}
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else {
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// exponent-multiplier notation
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prgsize = (((1 << (iNES_HEADER[4] >> 2)) * ((iNES_HEADER[4] & 0b11) * 2 + 1)) >> 14); //*16
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}
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if (prgsize != 0)
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prgsize = (int(log(prgsize) / log(2)));
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EEPROM_writeAnything(8, prgsize);
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// CHR size
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if ((iNES_HEADER[9] & 0xF0) != 0xF0) {
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// simple notation
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chrsize = (uppow2(iNES_HEADER[5] | ((iNES_HEADER[9] & 0xF0) << 4))) * 2; //*4
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}
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else {
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chrsize = (((1 << (iNES_HEADER[5] >> 2)) * ((iNES_HEADER[5] & 0b11) * 2 + 1)) >> 13) * 2; //*4
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}
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if (chrsize != 0)
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chrsize = (int(log(chrsize) / log(2)));
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EEPROM_writeAnything(9, chrsize);
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// RAM size
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ramsize = ((iNES_HEADER[10] & 0xF0) ? (64 << ((iNES_HEADER[10] & 0xF0) >> 4)) : 0) / 4096; //*4
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if (ramsize != 0)
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ramsize = (int(log(ramsize) / log(2)));
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EEPROM_writeAnything(10, ramsize);
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// Get name
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byte myLength = 0;
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for (unsigned int i = 0; i < 20; i++) {
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// Stop at first "(" to remove "(Country)"
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if (char(gamename[i]) == 40) {
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break;
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}
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if (((char(gamename[i]) >= 48 && char(gamename[i]) <= 57) || (char(gamename[i]) >= 65 && char(gamename[i]) <= 90) || (char(gamename[i]) >= 97 && char(gamename[i]) <= 122)) && (myLength < 15)) {
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romName[myLength] = char(gamename[i]);
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myLength++;
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}
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}
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// If name consists out of all japanese characters use CART as name
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if (myLength == 0) {
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romName[0] = 'C';
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romName[1] = 'A';
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romName[2] = 'R';
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romName[3] = 'T';
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}
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// Print name
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display_Clear();
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println_Msg(romName);
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display_Update();
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return 1;
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break;
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}
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}
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// File searched until end but nothing found
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if (strcmp(crc_search, crcStr) != 0) {
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println_Msg(F("Not found"));
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return 0;
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}
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}
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else {
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println_Msg(F("Database file not found"));
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return 0;
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}
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}
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}
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