Mirrors/cartreader
2
0
Fork 0
mirror of https://github.com/sanni/cartreader.git synced 2024-11-27 23:14:14 +01:00
Code Issues Projects Releases Wiki Activity

V31A: Fix writing Game Boy custom MBC3 Flashcart with MX29F016 flashrom

Browse Source 
These: https://www.jrodrigo.net/wiki/how-to-diy-a-gameboy-flash-cartridge-with-a-rom-adapter-board/
This commit is contained in:
sanni 2018-04-03 16:45:45 +02:00 committed by GitHub
parent 72dea4e96b
commit 8f4e33e20b
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 107 additions and 48 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
Cart_Reader/Cart_Reader.ino
View File

@ -2,8 +2,8 @@
Cartridge Reader for Arduino Mega2560
Author: sanni
Date: 2018-04-02
Version: V31
Date: 2018-04-03
Version: V31A
SD lib: https://github.com/greiman/SdFat
LCD lib: https://github.com/adafruit/Adafruit_SSD1306
@ -35,7 +35,7 @@
infinest - help with GB Memory cart
**********************************************************************************/
char ver[5] = "V31";
char ver[5] = "V31A";
/******************************************
Define Starting Point

91
Cart_Reader/GB.ino
View File

@ -23,9 +23,10 @@ static const char* const menuOptionsGBx[] PROGMEM = {gbxMenuItem1, gbxMenuItem2,
static const char GBMenuItem1[] PROGMEM = "Read Rom";
static const char GBMenuItem2[] PROGMEM = "Read Save";
static const char GBMenuItem3[] PROGMEM = "Write Save";
static const char GBMenuItem4[] PROGMEM = "Write Flashcart";
static const char GBMenuItem5[] PROGMEM = "Reset";
static const char* const menuOptionsGB[] PROGMEM = {GBMenuItem1, GBMenuItem2, GBMenuItem3, GBMenuItem4, GBMenuItem5};
static const char GBMenuItem4[] PROGMEM = "Flash MBC3 cart";
static const char GBMenuItem5[] PROGMEM = "Flash MBC5 cart";
static const char GBMenuItem6[] PROGMEM = "Reset";
static const char* const menuOptionsGB[] PROGMEM = {GBMenuItem1, GBMenuItem2, GBMenuItem3, GBMenuItem4, GBMenuItem5, GBMenuItem6};
// Start menu for both GB and GBA
void gbxMenu() {
@ -62,11 +63,11 @@ void gbxMenu() {
}
void gbMenu() {
// create menu with title and 5 options to choose from
// create menu with title and 6 options to choose from
unsigned char mainMenu;
// Copy menuOptions out of progmem
convertPgm(menuOptionsGB, 5);
mainMenu = question_box("GB Cart Reader", menuOptions, 5, 0);
convertPgm(menuOptionsGB, 6);
mainMenu = question_box("GB Cart Reader", menuOptions, 6, 0);
// wait for user choice to come back from the question box menu
switch (mainMenu)
@ -120,13 +121,24 @@ void gbMenu() {
case 3:
// Change working dir to root
sd.chdir("/");
writeFlash_GB();
//MBC3
writeFlash_GB(3);
// Reset
wait();
asm volatile (" jmp 0");
break;
case 4:
// Change working dir to root
sd.chdir("/");
//MBC5
writeFlash_GB(5);
// Reset
wait();
asm volatile (" jmp 0");
break;
case 5:
asm volatile (" jmp 0");
break;
}
@ -708,7 +720,7 @@ unsigned long verifySRAM_GB() {
// Write 29F032 flashrom
// A0-A13 directly connected to cart edge -> 16384(0x0-0x3FFF) bytes per bank -> 256(0x0-0xFF) banks
// A14-A21 connected to MBC5
void writeFlash_GB() {
void writeFlash_GB(byte MBC) {
// Launch filebrowser
filePath[0] = '\0';
sd.chdir("/");
@ -850,7 +862,60 @@ void writeFlash_GB() {
}
}
println_Msg(F("Writing flash"));
if (MBC == 3) {
println_Msg(F("Writing flash MBC3"));
display_Update();
// Write flash
dataOut();
uint16_t currAddr = 0;
for (int currBank = 1; currBank < romBanks; currBank++) {
// Blink led
PORTB ^= (1 << 4);
// Set ROM bank
writeByte_GB(0x2100, currBank);
if (currBank > 1) {
currAddr = 0x4000;
}
while (currAddr <= 0x7FFF) {
myFile.read(sdBuffer, 512);
for (int currByte = 0; currByte < 512; currByte++) {
// Write command sequence
writeByte_GB(0x555, 0xaa);
writeByte_GB(0x2aa, 0x55);
writeByte_GB(0x555, 0xa0);
// Write current byte
writeByte_GB(currAddr + currByte, sdBuffer[currByte]);
// Set data pins to input
dataIn();
// Setting CS(PH3) and OE/RD(PH6) LOW
PORTH &= ~((1 << 3) | (1 << 6));
// Busy check
while ((PINC & 0x80) != (sdBuffer[currByte] & 0x80)) {
}
// Switch CS(PH3) and OE/RD(PH6) to HIGH
PORTH |= (1 << 3) | (1 << 6);
// Set data pins to output
dataOut();
}
currAddr += 512;
}
}
}
else if (MBC == 5) {
println_Msg(F("Writing flash MBC5"));
display_Update();
// Write flash
@ -883,14 +948,7 @@ void writeFlash_GB() {
PORTH &= ~((1 << 3) | (1 << 6));
// Busy check
//int timeout = 0;
while ((PINC & 0x80) != (sdBuffer[currByte] & 0x80)) {
/* __asm__("nop\n\t");
// timeout in case writing fails
timeout++;
if (timeout > 32760) {
break;
}*/
}
// Switch CS(PH3) and OE/RD(PH6) to HIGH
@ -901,6 +959,7 @@ void writeFlash_GB() {
}
}
}
}
// Set data pins to input again
dataIn_GB();