mirror of
https://github.com/sanni/cartreader.git
synced 2024-11-10 23:15:08 +01:00
1019 lines
23 KiB
C++
1019 lines
23 KiB
C++
//******************************************
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// WonderSwan MODULE
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//******************************************
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// WonderSwan cartridge pinout
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// C40: /RST : PH0
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// C45: /CART? : PH3 (L when accessing cartridge (ROM/SRAM/PORT))
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// C42: /MMC : PH4 (access port on cartridge with both /CART and /MMC = L)
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// C44: /WE : PH5
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// C43: /OE : PH6
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// C47: CLK : PE3 (384KHz on real device)
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// C41: /IO? : PE4 (only use when unlocking MMC)
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// C46: INT : PG5 (for RTC alarm interrupt)
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/******************************************
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Menu
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*****************************************/
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static const char wsMenuItem1[] PROGMEM = "Read Rom";
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static const char wsMenuItem2[] PROGMEM = "Read Save";
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static const char wsMenuItem3[] PROGMEM = "Write Save";
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static const char wsMenuItem4[] PROGMEM = "Reset";
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static const char* const menuOptionsWS[] PROGMEM = {wsMenuItem1, wsMenuItem2, wsMenuItem3, wsMenuItem4};
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/******************************************
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* Developer Name
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*****************************************/
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static const char wsDevNameXX[] PROGMEM = "XXX";
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static const char wsDevName01[] PROGMEM = "BAN";
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static const char wsDevName12[] PROGMEM = "KNM";
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static const char wsDevName18[] PROGMEM = "KGT";
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static const char wsDevName1D[] PROGMEM = "BEC";
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static const char wsDevName24[] PROGMEM = "0MN";
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static const char wsDevName28[] PROGMEM = "SQR";
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static const char wsDevName31[] PROGMEM = "VGD";
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static uint8_t wsGameOrientation = 0;
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static uint8_t wsGameHasRTC = 0;
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static uint16_t wsGameChecksum = 0;
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static uint8_t wsEepromShiftReg[2];
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void setup_WS()
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{
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// A0 - A7
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DDRF = 0xff;
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// A8 - A15
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DDRK = 0xff;
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// A16 - A23
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DDRL = 0xff;
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// D0 - D15
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DDRC = 0x00;
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DDRA = 0x00;
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// controls
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DDRH |= ((1 << 0) | (1 << 3) | (1 << 4) | (1 << 5) | (1 << 6));
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PORTH |= ((1 << 0) | (1 << 3) | (1 << 4) | (1 << 5) | (1 << 6));
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DDRE |= ((1 << 3) | (1 << 4));
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PORTE |= (1 << 4);
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PORTE &= ~(1 << 3);
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// interrupt pin with internal pull-up
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DDRG &= ~(1 << 5);
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PORTG |= (1 << 5);
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display_Clear();
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// unlock MMC
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if (!unlockMMC2003_WS())
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print_Error(F("Can't initial MMC"), true);
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if (getCartInfo_WS() != 0xea)
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print_Error(F("Rom header read error"), true);
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showCartInfo_WS();
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mode = mode_WS;
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}
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void wsMenu()
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{
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uint8_t mainMenu;
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convertPgm(menuOptionsWS, 4);
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mainMenu = question_box(F("WonderSwan Menu"), menuOptions, 4, 0);
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switch (mainMenu)
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{
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case 0:
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{
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// Read Rom
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sd.chdir("/");
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readROM_WS(filePath, FILEPATH_LENGTH);
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sd.chdir("/");
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compareChecksum_WS(filePath);
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break;
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}
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case 1:
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{
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// Read Save
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sd.chdir("/");
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switch (saveType)
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{
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case 0: println_Msg(F("No save for this game")); break;
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case 1: readSRAM_WS(); break;
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case 2: readEEPROM_WS(); break;
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default: println_Msg(F("Unknow save type")); break;
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}
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break;
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}
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case 2:
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{
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// Write Save
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sd.chdir("/");
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switch (saveType)
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{
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case 0: println_Msg(F("No save for this game")); break;
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case 1:
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{
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writeSRAM_WS();
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verifySRAM_WS();
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break;
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}
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case 2:
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{
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writeEEPROM_WS();
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verifyEEPROM_WS();
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break;
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}
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default: println_Msg(F("Unknow save type")); break;
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}
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break;
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}
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default:
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{
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asm volatile (" jmp 0");
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break;
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}
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}
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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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uint8_t getCartInfo_WS()
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{
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dataIn_WS();
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for (uint32_t i = 0; i < 16; i += 2)
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*((uint16_t*)(sdBuffer + i)) = readWord_WS(0xffff0 + i);
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wsGameChecksum = *(uint16_t*)(sdBuffer + 14);
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// some game has wrong info in header
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// patch here
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switch (wsGameChecksum)
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{
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// games with 256kbits SRAM installed
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case 0xe600: // BAN007
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case 0x8eed: // BANC16
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{
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sdBuffer[11] = 0x02;
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break;
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}
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// games missing 'COLOR' flag
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case 0x26db: // SQRC01
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{
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sdBuffer[7] = 0x01;
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break;
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}
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case 0x7f73: // BAN030
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{
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// missing developerId and cartId
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sdBuffer[6] = 0x01;
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sdBuffer[8] = 0x30;
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break;
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}
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case 0x0000:
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{
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// developerId/cartId/checksum are all filled with 0x00 in wonderwitch based games
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if (readWord_WS(0xf0000) == 0x4c45 && readWord_WS(0xf0002) == 0x5349 && readWord_WS(0xf0004) == 0x0041)
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{
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// looking for "<Ini" string
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if (readWord_WS(0xec456) == 0x493c && readWord_WS(0xec458) == 0x696e)
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{
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// wonderwitch SWJ-7AC003
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sdBuffer[6] = 0x7a;
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sdBuffer[8] = 0xc3;
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// TODO check OS version and fill into version field
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}
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// looking for "<Ini" string
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else if (readWord_WS(0x839d8) == 0x493c && readWord_WS(0x839da) == 0x696e)
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{
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if (readWord_WS(0x93246) == 0x4a2f && readWord_WS(0x93248) == 0x5353 && readWord_WS(0x9324a) == 0x2e32)
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{
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// jss2
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// TODO check jss version
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sdBuffer[6] = 0xff; // WWGP
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sdBuffer[8] = 0x1a; // 2001A
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sdBuffer[7] = 0x01; // color only
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if (readWord_WS(0x93e9c) == 0x4648 && readWord_WS(0x93e9e) == 0x0050)
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{
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// WWGP2001A3 -> HFP Version
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sdBuffer[9] = 0x03;
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wsGameChecksum = 0x4870;
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}
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else
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{
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// TODO other version
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}
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}
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else if (readWord_WS(0xe4260) == 0x6b64 && readWord_WS(0xe4262) == 0x696e)
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{
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// dknight
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sdBuffer[6] = 0xff; // WWGP
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sdBuffer[8] = 0x2b; // 2002B
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sdBuffer[7] = 0x01; // color only
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sdBuffer[9] = 0x00;
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wsGameChecksum = 0x8b1c;
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}
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}
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}
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break;
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}
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}
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romType = sdBuffer[7]; // wsc only = 1
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romVersion = sdBuffer[9];
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romSize = sdBuffer[10];
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sramSize = sdBuffer[11];
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wsGameOrientation = (sdBuffer[12] & 0x01);
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wsGameHasRTC = (sdBuffer[13] & 0x01);
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snprintf(vendorID, 4, "%02X", sdBuffer[6]);
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snprintf(cartID, 4, "%c%02X", ((romType & 0x01) ? 'C' : '0'), sdBuffer[8]);
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snprintf(checksumStr, 5, "%04X", wsGameChecksum);
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snprintf(romName, 17, "%s%s", vendorID, cartID);
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switch (romSize)
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{
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case 0x01: cartSize = 131072 * 2; break;
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case 0x02: cartSize = 131072 * 4; break;
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case 0x03: cartSize = 131072 * 8; break;
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case 0x04: cartSize = 131072 * 16; break;
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// case 0x05: cartSize = 131072 * 24; break;
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case 0x06: cartSize = 131072 * 32; break;
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// case 0x07: cartSize = 131072 * 48; break;
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case 0x08: cartSize = 131072 * 64; break;
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case 0x09: cartSize = 131072 * 128; break;
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default: cartSize = 0; break;
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}
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switch (sramSize)
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{
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case 0x00: saveType = 0; sramSize = 0; break;
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case 0x01: saveType = 1; sramSize = 64; break;
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case 0x02: saveType = 1; sramSize = 256; break;
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case 0x03: saveType = 1; sramSize = 1024; break;
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case 0x04: saveType = 1; sramSize = 2048; break;
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case 0x10: saveType = 2; sramSize = 1; break;
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case 0x20: saveType = 2; sramSize = 16; break;
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case 0x50: saveType = 2; sramSize = 8; break;
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default: saveType = 0xff; break;
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}
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if (saveType == 2)
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unprotectEEPROM();
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// should be 0xea (JMPF instruction)
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return sdBuffer[0];
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}
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void showCartInfo_WS()
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{
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display_Clear();
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println_Msg(F("WonderSwan Cart Info"));
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print_Msg(F("Game: "));
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println_Msg(romName);
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print_Msg(F("Rom Size: "));
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if (cartSize == 0x00)
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println_Msg(romSize, HEX);
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else
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{
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print_Msg(cartSize / 131072);
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println_Msg(F(" Mb"));
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}
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print_Msg(F("Save: "));
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switch (saveType)
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{
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case 0: println_Msg(F("None")); break;
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case 1: print_Msg(F("Sram ")); print_Msg(sramSize); println_Msg(F("Kb")); break;
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case 2: print_Msg(F("Eeprom ")); print_Msg(sramSize); println_Msg(F("Kb")); break;
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default: println_Msg(sramSize, HEX); break;
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}
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print_Msg(F("Vesion: 1."));
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println_Msg(romVersion, HEX);
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print_Msg(F("Checksum: "));
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println_Msg(checksumStr);
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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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void readROM_WS(char *outPathBuf, size_t bufferSize)
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{
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// generate fullname of rom file
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snprintf(fileName, FILENAME_LENGTH, "%s.ws", romName);
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// create a new folder for storing rom file
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EEPROM_readAnything(0, foldern);
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snprintf(folder, sizeof(folder), "WS/ROM/%s/%d", romName, foldern);
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sd.mkdir(folder, true);
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sd.chdir(folder);
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// filling output file path to buffer
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if (outPathBuf != NULL && bufferSize > 0)
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snprintf(outPathBuf, bufferSize, "%s/%s", folder, fileName);
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display_Clear();
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print_Msg(F("Saving to "));
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print_Msg(folder);
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println_Msg(F("/..."));
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display_Update();
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// open file on sdcard
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if (!myFile.open(fileName, O_RDWR | O_CREAT))
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print_Error(F("Can't create file on SD"), true);
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// write new folder number back to EEPROM
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foldern++;
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EEPROM_writeAnything(0, foldern);
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// get correct starting rom bank
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uint16_t bank = (256 - (cartSize >> 16));
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// start reading rom
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for (; bank <= 0xff; bank++)
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{
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// switch bank on segment 0x2
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dataOut_WS();
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writeByte_WSPort(0xc2, bank);
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dataIn_WS();
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for (uint32_t addr = 0; addr < 0x10000; addr += 512)
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{
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// blink LED
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if ((addr & ((1 << 14) - 1)) == 0)
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PORTB ^= (1 << 4);
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for (uint32_t w = 0; w < 512; w += 2)
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*((uint16_t*)(sdBuffer + w)) = readWord_WS(0x20000 + addr + w);
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myFile.write(sdBuffer, 512);
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}
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}
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myFile.close();
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}
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void readSRAM_WS()
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{
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// generate fullname of rom file
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snprintf(fileName, FILENAME_LENGTH, "%s.sav", romName);
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// create a new folder for storing rom file
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EEPROM_readAnything(0, foldern);
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snprintf(folder, sizeof(folder), "WS/SAVE/%s/%d", romName, foldern);
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sd.mkdir(folder, true);
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sd.chdir(folder);
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display_Clear();
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print_Msg(F("Saving to "));
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print_Msg(folder);
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println_Msg(F("/.."));
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display_Update();
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foldern++;
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EEPROM_writeAnything(0, foldern);
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if (!myFile.open(fileName, O_RDWR | O_CREAT))
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print_Error(F("Can't create file on SD"), true);
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uint32_t bank_size = (sramSize << 7);
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uint16_t end_bank = (bank_size >> 16); // 64KB per bank
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if (bank_size > 0x10000)
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bank_size = 0x10000;
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uint16_t bank = 0;
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do
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{
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dataOut_WS();
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writeByte_WSPort(0xc1, bank);
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dataIn_WS();
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for (uint32_t addr = 0; addr < bank_size; addr += 512)
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{
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// blink LED
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if ((addr & ((1 << 14) - 1)) == 0)
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PORTB ^= (1 << 4);
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// SRAM data on D0-D7, with A-1 to select high/low byte
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for (uint32_t w = 0; w < 512; w++)
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sdBuffer[w] = readWord_WS(0x10000 + addr + w);
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myFile.write(sdBuffer, 512);
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}
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} while (++bank < end_bank);
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myFile.close();
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println_Msg(F("Done"));
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display_Update();
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}
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void verifySRAM_WS()
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{
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print_Msg(F("Verifying... "));
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if (myFile.open(filePath, O_READ))
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{
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uint32_t bank_size = (sramSize << 7);
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uint16_t end_bank = (bank_size >> 16); // 64KB per bank
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uint16_t bank = 0;
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uint32_t write_errors = 0;
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if (bank_size > 0x10000)
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bank_size = 0x10000;
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do
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{
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dataOut_WS();
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writeByte_WSPort(0xc1, bank);
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dataIn_WS();
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for (uint32_t addr = 0; addr < bank_size && myFile.available(); addr += 512)
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{
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myFile.read(sdBuffer, 512);
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// SRAM data on D0-D7, with A-1 to select high/low byte
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for (uint32_t w = 0; w < 512; w++)
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{
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if ((readWord_WS(0x10000 + addr + w) & 0x00ff) != sdBuffer[w])
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write_errors++;
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}
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}
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} while (++bank < end_bank);
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myFile.close();
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if (write_errors == 0)
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{
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println_Msg(F("passed"));
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}
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else
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{
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println_Msg(F("failed"));
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print_Msg(F("Error: "));
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print_Msg(write_errors);
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println_Msg(F(" bytes "));
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print_Error(F("did not verify."), false);
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}
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}
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else
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{
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print_Error(F("File doesn't exist"), false);
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}
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}
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void writeSRAM_WS()
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{
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filePath[0] = 0;
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sd.chdir("/");
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fileBrowser(F("Select sav file"));
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snprintf(filePath, FILEPATH_LENGTH, "%s/%s", filePath, fileName);
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display_Clear();
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print_Msg(F("Writing from "));
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print_Msg(filePath);
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println_Msg(F(".."));
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display_Update();
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if (myFile.open(filePath, O_READ))
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{
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uint32_t bank_size = (sramSize << 7);
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uint16_t end_bank = (bank_size >> 16); // 64KB per bank
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if (bank_size > 0x10000)
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bank_size = 0x10000;
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uint16_t bank = 0;
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dataOut_WS();
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do
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{
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writeByte_WSPort(0xc1, bank);
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for (uint32_t addr = 0; addr < bank_size && myFile.available(); addr += 512)
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{
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// blink LED
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if ((addr & ((1 << 14) - 1)) == 0)
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PORTB ^= (1 << 4);
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myFile.read(sdBuffer, 512);
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// SRAM data on D0-D7, with A-1 to select high/low byte
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for (uint32_t w = 0; w < 512; w++)
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writeWord_WS(0x10000 + addr + w, sdBuffer[w]);
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}
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} while (++bank < end_bank);
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myFile.close();
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println_Msg(F("Writing finished"));
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display_Update();
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}
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else
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{
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print_Error(F("File doesn't exist"), false);
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}
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}
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void readEEPROM_WS()
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|
{
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// generate fullname of eep file
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snprintf(fileName, FILENAME_LENGTH, "%s.eep", romName);
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// create a new folder for storing eep file
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EEPROM_readAnything(0, foldern);
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snprintf(folder, sizeof(folder), "WS/SAVE/%s/%d", romName, foldern);
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sd.mkdir(folder, true);
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sd.chdir(folder);
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display_Clear();
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print_Msg(F("Saving to "));
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print_Msg(folder);
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println_Msg(F("/.."));
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display_Update();
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foldern++;
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EEPROM_writeAnything(0, foldern);
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if (!myFile.open(fileName, O_RDWR | O_CREAT))
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print_Error(F("Can't create file on SD"), true);
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uint32_t eepromSize = (sramSize << 7);
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uint32_t bufSize = (eepromSize < 512 ? eepromSize : 512);
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for (uint32_t i = 0; i < eepromSize; i += bufSize)
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{
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for (uint32_t j = 0; j < bufSize; j += 2)
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{
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// blink LED
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if ((j & 0x1f) == 0x00)
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PORTB ^= (1 << 4);
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generateEepromInstruction_WS(wsEepromShiftReg, 0x2, ((i + j) >> 1));
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dataOut_WS();
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writeByte_WSPort(0xc6, wsEepromShiftReg[0]);
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writeByte_WSPort(0xc7, wsEepromShiftReg[1]);
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writeByte_WSPort(0xc8, 0x10);
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// MMC will shift out from port 0xc7 to 0xc6
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// and shift in 16bits into port 0xc5 to 0xc4
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pulseCLK_WS(1 + 32 + 3);
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dataIn_WS();
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sdBuffer[j] = readByte_WSPort(0xc4);
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sdBuffer[j + 1] = readByte_WSPort(0xc5);
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}
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myFile.write(sdBuffer, bufSize);
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}
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myFile.close();
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println_Msg(F("Done"));
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}
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void verifyEEPROM_WS()
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{
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print_Msg(F("Verifying... "));
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if (myFile.open(filePath, O_READ))
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{
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uint32_t write_errors = 0;
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uint32_t eepromSize = (sramSize << 7);
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uint32_t bufSize = (eepromSize < 512 ? eepromSize : 512);
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for (uint32_t i = 0; i < eepromSize; i += bufSize)
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{
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myFile.read(sdBuffer, bufSize);
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for (uint32_t j = 0; j < bufSize; j += 2)
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{
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// blink LED
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if ((j & 0x1f) == 0x00)
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PORTB ^= (1 << 4);
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generateEepromInstruction_WS(wsEepromShiftReg, 0x2, ((i + j) >> 1));
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dataOut_WS();
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writeByte_WSPort(0xc6, wsEepromShiftReg[0]);
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writeByte_WSPort(0xc7, wsEepromShiftReg[1]);
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writeByte_WSPort(0xc8, 0x10);
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// MMC will shift out from port 0xc7 to 0xc6
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// and shift in 16bits into port 0xc5 to 0xc4
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pulseCLK_WS(1 + 32 + 3);
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dataIn_WS();
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if (readByte_WSPort(0xc4) != sdBuffer[j])
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write_errors++;
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if (readByte_WSPort(0xc5) != sdBuffer[j + 1])
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write_errors++;
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}
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}
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myFile.close();
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if (write_errors == 0)
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{
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println_Msg(F("passed"));
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}
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else
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{
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println_Msg(F("failed"));
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print_Msg(F("Error: "));
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print_Msg(write_errors);
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println_Msg(F(" bytes "));
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print_Error(F("did not verify."), false);
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}
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}
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else
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{
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print_Error(F("File doesn't exist"), false);
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}
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}
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void writeEEPROM_WS()
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{
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filePath[0] = 0;
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sd.chdir("/");
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fileBrowser(F("Select eep file"));
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snprintf(filePath, FILEPATH_LENGTH, "%s/%s", filePath, fileName);
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display_Clear();
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print_Msg(F("Writing from "));
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print_Msg(filePath);
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println_Msg(F(".."));
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display_Update();
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if (myFile.open(filePath, O_READ))
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{
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uint32_t eepromSize = (sramSize << 7);
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uint32_t bufSize = (eepromSize < 512 ? eepromSize : 512);
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for (uint32_t i = 0; i < eepromSize; i += bufSize)
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{
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myFile.read(sdBuffer, bufSize);
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for (uint32_t j = 0; j < bufSize; j += 2)
|
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{
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// blink LED
|
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if ((j & 0x1f) == 0x00)
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PORTB ^= (1 << 4);
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generateEepromInstruction_WS(wsEepromShiftReg, 0x1, ((i + j) >> 1));
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dataOut_WS();
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writeByte_WSPort(0xc6, wsEepromShiftReg[0]);
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writeByte_WSPort(0xc7, wsEepromShiftReg[1]);
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writeByte_WSPort(0xc4, sdBuffer[j]);
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writeByte_WSPort(0xc5, sdBuffer[j + 1]);
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writeByte_WSPort(0xc8, 0x20);
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// MMC will shift out from port 0xc7 to 0xc4
|
|
pulseCLK_WS(1 + 32 + 3);
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dataIn_WS();
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do { pulseCLK_WS(128); }
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while ((readByte_WSPort(0xc8) & 0x02) == 0x00);
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}
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}
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myFile.close();
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println_Msg(F("Done"));
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}
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else
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{
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print_Error(F("File doesn't exist"), false);
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}
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}
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boolean compareChecksum_WS(const char *wsFilePath)
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{
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|
if (wsFilePath == NULL)
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return 0;
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println_Msg(F("Calculating Checksum"));
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display_Update();
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if (!myFile.open(wsFilePath, O_READ))
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{
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print_Error(F("Failed to open file"), false);
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return 0;
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}
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uint32_t calLength = myFile.fileSize() - 512;
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uint32_t checksum = 0;
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for (uint32_t i = 0; i < calLength; i += 512)
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{
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myFile.read(sdBuffer, 512);
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for (uint32_t j = 0; j < 512; j++)
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checksum += sdBuffer[j];
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}
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// last 512 bytes
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myFile.read(sdBuffer, 512);
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// skip last 2 bytes (checksum value)
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for (uint32_t j = 0; j < 510; j++)
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checksum += sdBuffer[j];
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myFile.close();
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checksum &= 0x0000ffff;
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|
calLength = wsGameChecksum;
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// don't know why formating string "%04X(%04X)" always output "xxxx(0000)"
|
|
// so split into two snprintf
|
|
char result[11];
|
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snprintf(result, 5, "%04X", calLength);
|
|
snprintf(result + 4, 11 - 4, "(%04X)", checksum);
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print_Msg(F("Result: "));
|
|
println_Msg(result);
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|
|
if (checksum == calLength)
|
|
{
|
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println_Msg(F("Checksum matches"));
|
|
display_Update();
|
|
return 1;
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|
}
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else
|
|
{
|
|
print_Error(F("Checksum Error"), false);
|
|
return 0;
|
|
}
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}
|
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void writeByte_WSPort(uint8_t port, uint8_t data)
|
|
{
|
|
PORTF = (port & 0x0f);
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PORTL = (port >> 4);
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|
// switch CART(PH3), MMC(PH4) to LOW
|
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PORTH &= ~((1 << 3) | (1 << 4));
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// set data
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PORTC = data;
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// switch WE(PH5) to LOW
|
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PORTH &= ~(1 << 5);
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NOP;
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// switch WE(PH5) to HIGH
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PORTH |= (1 << 5);
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NOP; NOP;
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|
|
// switch CART(PH3), MMC(PH4) to HIGH
|
|
PORTH |= ((1 << 3) | (1 << 4));
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}
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|
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uint8_t readByte_WSPort(uint8_t port)
|
|
{
|
|
PORTF = (port & 0x0f);
|
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PORTL = (port >> 4);
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|
|
// switch CART(PH3), MMC(PH4) to LOW
|
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PORTH &= ~((1 << 3) | (1 << 4));
|
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|
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// switch OE(PH6) to LOW
|
|
PORTH &= ~(1 << 6);
|
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NOP; NOP; NOP;
|
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|
|
uint8_t ret = PINC;
|
|
|
|
// switch OE(PH6) to HIGH
|
|
PORTH |= (1 << 6);
|
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|
|
// switch CART(PH3), MMC(PH4) to HIGH
|
|
PORTH |= ((1 << 3) | (1 << 4));
|
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|
|
return ret;
|
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}
|
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|
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void writeWord_WS(uint32_t addr, uint16_t data)
|
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{
|
|
PORTF = addr & 0xff;
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PORTK = (addr >> 8) & 0xff;
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|
PORTL = (addr >> 16) & 0x0f;
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|
|
PORTC = data & 0xff;
|
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PORTA = (data >> 8);
|
|
|
|
// switch CART(PH3) and WE(PH5) to LOW
|
|
PORTH &= ~((1 << 3) | (1 << 5));
|
|
NOP;
|
|
|
|
// switch CART(PH3) and WE(PH5) to HIGH
|
|
PORTH |= (1 << 3) | (1 << 5);
|
|
NOP; NOP;
|
|
}
|
|
|
|
uint16_t readWord_WS(uint32_t addr)
|
|
{
|
|
PORTF = addr & 0xff;
|
|
PORTK = (addr >> 8) & 0xff;
|
|
PORTL = (addr >> 16) & 0x0f;
|
|
|
|
// switch CART(PH3) and OE(PH6) to LOW
|
|
PORTH &= ~((1 << 3) | (1 << 6));
|
|
NOP; NOP; NOP;
|
|
|
|
uint16_t ret = ((PINA << 8) | PINC);
|
|
|
|
// switch CART(PH3) and OE(PH6) to HIGH
|
|
PORTH |= (1 << 3) | (1 << 6);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void unprotectEEPROM()
|
|
{
|
|
generateEepromInstruction_WS(wsEepromShiftReg, 0x0, 0x3);
|
|
|
|
dataOut_WS();
|
|
writeByte_WSPort(0xc6, wsEepromShiftReg[0]);
|
|
writeByte_WSPort(0xc7, wsEepromShiftReg[1]);
|
|
writeByte_WSPort(0xc8, 0x40);
|
|
|
|
// MMC will shift out port 0xc7 to 0xc6 to EEPROM
|
|
pulseCLK_WS(1 + 16 + 3);
|
|
}
|
|
|
|
// generate data for port 0xc6 to 0xc7
|
|
// number of CLK pulses needed for each instruction is 1 + (16 or 32) + 3
|
|
void generateEepromInstruction_WS(uint8_t *instruction, uint8_t opcode, uint16_t addr)
|
|
{
|
|
uint8_t addr_bits = (sramSize > 1 ? 10 : 6);
|
|
uint16_t *ptr = (uint16_t*)instruction;
|
|
*ptr = 0x0001; // initial with a start bit
|
|
|
|
if (opcode == 0)
|
|
{
|
|
// 2bits opcode = 0x00
|
|
*ptr <<= 2;
|
|
// 2bits ext cmd (from addr)
|
|
*ptr <<= 2;
|
|
*ptr |= (addr & 0x0003);
|
|
*ptr <<= (addr_bits - 2);
|
|
}
|
|
else
|
|
{
|
|
// 2bits opcode
|
|
*ptr <<= 2;
|
|
*ptr |= (opcode & 0x03);
|
|
// address bits
|
|
*ptr <<= addr_bits;
|
|
*ptr |= (addr & ((1 << addr_bits) - 1));
|
|
}
|
|
}
|
|
|
|
// 2003 MMC need to be unlock,
|
|
// or it will reject all reading and bank switching
|
|
boolean unlockMMC2003_WS()
|
|
{
|
|
dataOut_WS();
|
|
|
|
// initialize all control pin state
|
|
// RST(PH0) and CLK(PE3) to LOW
|
|
// CART(PH3) MMC(PH4) WE(PH5) OE(PH6) IO(PE4) to HIGH
|
|
PORTH &= ~(1 << 0);
|
|
PORTE &= ~(1 << 3);
|
|
PORTH |= ((1 << 3) | (1 << 4) | (1 << 5) | (1 << 6));
|
|
PORTE |= (1 << 4);
|
|
|
|
// switch RST(PH0) to HIGH
|
|
PORTH |= (1 << 0);
|
|
|
|
// data = 0x00ff
|
|
PORTC = 0xff;
|
|
PORTA = 0x00;
|
|
|
|
// port = 0x5a?
|
|
PORTF = 0x0a;
|
|
PORTL = 0x05;
|
|
pulseCLK_WS(5);
|
|
|
|
// port = 0xa5?
|
|
PORTF = 0x05;
|
|
PORTL = 0x0a;
|
|
pulseCLK_WS(4);
|
|
|
|
// IO(PE4) to LOW
|
|
PORTE &= ~(1 << 4);
|
|
pulseCLK_WS(6);
|
|
|
|
// IO(PE4) to HIGH
|
|
PORTE |= (1 << 4);
|
|
pulseCLK_WS(1);
|
|
|
|
// IO(PE4) to LOW
|
|
PORTE &= ~(1 << 4);
|
|
pulseCLK_WS(1);
|
|
|
|
// IO(PE4) to HIGH
|
|
PORTE |= (1 << 4);
|
|
pulseCLK_WS(1);
|
|
|
|
// IO(PE4) to LOW
|
|
PORTE &= ~(1 << 4);
|
|
pulseCLK_WS(3);
|
|
|
|
// IO(PE4) to HIGH
|
|
PORTE |= (1 << 4);
|
|
pulseCLK_WS(1);
|
|
|
|
// IO(PE4) to LOW
|
|
PORTE &= ~(1 << 4);
|
|
pulseCLK_WS(1);
|
|
|
|
// IO(PE4) to HIGH
|
|
PORTE |= (1 << 4);
|
|
pulseCLK_WS(1);
|
|
|
|
// IO(PE4) to LOW
|
|
PORTE &= ~(1 << 4);
|
|
pulseCLK_WS(3);
|
|
|
|
// IO(PE4) to HIGH
|
|
PORTE |= (1 << 4);
|
|
|
|
// pulse CLK once
|
|
pulseCLK_WS(1);
|
|
|
|
// unlock procedure finished
|
|
// see if we can set bank number to MMC
|
|
writeByte_WSPort(0xc2, 0xaa);
|
|
writeByte_WSPort(0xc3, 0x55);
|
|
|
|
dataIn_WS();
|
|
if (readByte_WSPort(0xc2) == 0xaa && readByte_WSPort(0xc3) == 0x55)
|
|
{
|
|
// now set initial bank number to MMC
|
|
dataOut_WS();
|
|
writeByte_WSPort(0xc0, 0x2f);
|
|
writeByte_WSPort(0xc1, 0x3f);
|
|
writeByte_WSPort(0xc2, 0xff);
|
|
writeByte_WSPort(0xc3, 0xff);
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
// doing a L->H on CLK(PE3) pin
|
|
void pulseCLK_WS(uint8_t count)
|
|
{
|
|
register uint8_t tic;
|
|
|
|
// about 384KHz, 50% duty cycle
|
|
asm volatile
|
|
("L0_%=:\n\t"
|
|
"cpi %[count], 0\n\t"
|
|
"breq L3_%=\n\t"
|
|
"dec %[count]\n\t"
|
|
"cbi %[porte], 3\n\t"
|
|
"ldi %[tic], 6\n\t"
|
|
"L1_%=:\n\t"
|
|
"dec %[tic]\n\t"
|
|
"brne L1_%=\n\t"
|
|
"sbi %[porte], 3\n\t"
|
|
"ldi %[tic], 5\n\t"
|
|
"L2_%=:\n\t"
|
|
"dec %[tic]\n\t"
|
|
"brne L2_%=\n\t"
|
|
"rjmp L0_%=\n\t"
|
|
"L3_%=:\n\t"
|
|
: [tic] "=a" (tic)
|
|
: [count] "a" (count), [porte] "I" (_SFR_IO_ADDR(PORTE))
|
|
);
|
|
}
|
|
|
|
void dataIn_WS()
|
|
{
|
|
DDRC = 0x00;
|
|
DDRA = 0x00;
|
|
}
|
|
|
|
void dataOut_WS()
|
|
{
|
|
DDRC = 0xff;
|
|
DDRA = 0xff;
|
|
}
|