mirror of
https://github.com/sanni/cartreader.git
synced 2024-11-26 22:44:15 +01:00
398 lines
9.8 KiB
C++
398 lines
9.8 KiB
C++
//******************************************
|
|
// SNES Game Processor RAM Cassette code by LuigiBlood
|
|
// Revision 1.0.0 February 2024
|
|
//******************************************
|
|
#ifdef ENABLE_GPC
|
|
|
|
/******************************************
|
|
Game Processor RAM Cassette
|
|
******************************************/
|
|
/******************************************
|
|
Prototype Declarations
|
|
*****************************************/
|
|
/* Hoping that sanni will use this progressbar function */
|
|
extern void draw_progressbar(uint32_t processedsize, uint32_t totalsize);
|
|
|
|
//void gpcMenu();
|
|
void readRAM_GPC();
|
|
//void setup_GPC();
|
|
void writeRAM_GPC(void);
|
|
|
|
/******************************************
|
|
Variables
|
|
*****************************************/
|
|
//No global variables
|
|
|
|
/******************************************
|
|
Menu
|
|
*****************************************/
|
|
// GPC flash menu items
|
|
static const char gpcFlashMenuItem1[] PROGMEM = "Read RAM";
|
|
static const char gpcFlashMenuItem2[] PROGMEM = "Write RAM";
|
|
static const char* const menuOptionsGPCFlash[] PROGMEM = { gpcFlashMenuItem1, gpcFlashMenuItem2, FSTRING_RESET };
|
|
|
|
|
|
void gpcMenu() {
|
|
// create menu with title and 3 options to choose from
|
|
unsigned char mainMenu;
|
|
// Copy menuOptions out of progmem
|
|
convertPgm(menuOptionsGPCFlash, 3);
|
|
mainMenu = question_box(F("Game Processor RAM"), menuOptions, 3, 0);
|
|
|
|
// wait for user choice to come back from the question box menu
|
|
switch (mainMenu) {
|
|
// Read ram
|
|
case 0:
|
|
// Change working dir to root
|
|
sd.chdir("/");
|
|
readRAM_GPC();
|
|
break;
|
|
|
|
// Write ram
|
|
case 1:
|
|
// Change working dir to root
|
|
sd.chdir("/");
|
|
writeRAM_GPC();
|
|
unsigned long wrErrors;
|
|
wrErrors = verifyRAM_GPC();
|
|
if (wrErrors == 0) {
|
|
println_Msg(F("Verified OK"));
|
|
display_Update();
|
|
} else {
|
|
print_STR(error_STR, 0);
|
|
print_Msg(wrErrors);
|
|
print_STR(_bytes_STR, 1);
|
|
print_Error(did_not_verify_STR);
|
|
}
|
|
wait();
|
|
break;
|
|
|
|
// Reset
|
|
case 2:
|
|
resetArduino();
|
|
break;
|
|
}
|
|
}
|
|
|
|
/******************************************
|
|
Setup
|
|
*****************************************/
|
|
void setup_GPC() {
|
|
// Request 5V
|
|
setVoltage(VOLTS_SET_5V);
|
|
|
|
// Set cicrstPin(PG1) to Output
|
|
DDRG |= (1 << 1);
|
|
// Output a high signal until we're ready to start
|
|
PORTG |= (1 << 1);
|
|
// Set cichstPin(PG0) to Input
|
|
DDRG &= ~(1 << 0);
|
|
|
|
// Adafruit Clock Generator
|
|
i2c_found = clockgen.init(SI5351_CRYSTAL_LOAD_8PF, 0, 0);
|
|
if (i2c_found) {
|
|
clockgen.set_pll(SI5351_PLL_FIXED, SI5351_PLLA);
|
|
clockgen.set_pll(SI5351_PLL_FIXED, SI5351_PLLB);
|
|
clockgen.set_freq(2147727200ULL, SI5351_CLK0);
|
|
clockgen.set_freq(307200000ULL, SI5351_CLK2);
|
|
clockgen.output_enable(SI5351_CLK0, 1);
|
|
clockgen.output_enable(SI5351_CLK1, 0);
|
|
clockgen.output_enable(SI5351_CLK2, 1);
|
|
}
|
|
#ifdef ENABLE_CLOCKGEN
|
|
else {
|
|
display_Clear();
|
|
print_FatalError(F("Clock Generator not found"));
|
|
}
|
|
#endif
|
|
|
|
// Set Address Pins to Output
|
|
//A0-A7
|
|
DDRF = 0xFF;
|
|
//A8-A15
|
|
DDRK = 0xFF;
|
|
//BA0-BA7
|
|
DDRL = 0xFF;
|
|
//PA0-PA7
|
|
DDRA = 0xFF;
|
|
|
|
// Set Control Pins to Output RST(PH0) CS(PH3) WR(PH5) RD(PH6)
|
|
DDRH |= (1 << 0) | (1 << 3) | (1 << 5) | (1 << 6);
|
|
// Switch RST(PH0) and WR(PH5) to HIGH
|
|
PORTH |= (1 << 0) | (1 << 5);
|
|
// Switch CS(PH3) and RD(PH6) to LOW
|
|
PORTH &= ~((1 << 3) | (1 << 6));
|
|
|
|
// Set Refresh(PE5) to Output
|
|
DDRE |= (1 << 5);
|
|
// Switch Refresh(PE5) to LOW (needed for SA-1)
|
|
PORTE &= ~(1 << 5);
|
|
|
|
// Set CPU Clock(PH1) to Output
|
|
DDRH |= (1 << 1);
|
|
//PORTH &= ~(1 << 1);
|
|
|
|
// Set IRQ(PH4) to Input
|
|
DDRH &= ~(1 << 4);
|
|
// Activate Internal Pullup Resistors
|
|
//PORTH |= (1 << 4);
|
|
|
|
// Set expand(PG5) to output
|
|
DDRG |= (1 << 5);
|
|
// Output High
|
|
PORTG |= (1 << 5);
|
|
|
|
// Set Data Pins (D0-D7) to Input
|
|
DDRC = 0x00;
|
|
// Enable Internal Pullups
|
|
//PORTC = 0xFF;
|
|
|
|
// Unused pins
|
|
// Set wram(PE4) to Output
|
|
DDRE |= (1 << 4);
|
|
//PORTE &= ~(1 << 4);
|
|
// Set pawr(PJ1) to Output
|
|
DDRJ |= (1 << 1);
|
|
//PORTJ &= ~(1 << 1);
|
|
// Set pard(PJ0) to Output
|
|
DDRJ |= (1 << 0);
|
|
//PORTJ &= ~(1 << 0);
|
|
|
|
// Start CIC by outputting a low signal to cicrstPin(PG1)
|
|
PORTG &= ~(1 << 1);
|
|
|
|
// Wait for CIC reset
|
|
delay(1000);
|
|
}
|
|
|
|
/******************************************
|
|
Low level functions
|
|
*****************************************/
|
|
// Write one byte of data to a location specified by bank and address, 00:0000
|
|
void writeBank_GPC(byte myBank, word myAddress, byte myData) {
|
|
PORTL = myBank;
|
|
PORTF = myAddress & 0xFF;
|
|
PORTK = (myAddress >> 8) & 0xFF;
|
|
PORTC = myData;
|
|
|
|
// Arduino running at 16Mhz -> one nop = 62.5ns
|
|
// Wait till output is stable
|
|
__asm__("nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t");
|
|
|
|
// Switch WR(PH5) to LOW
|
|
PORTH &= ~(1 << 5);
|
|
|
|
// Leave WR low for at least 60ns
|
|
__asm__("nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t");
|
|
|
|
// Switch WR(PH5) to HIGH
|
|
PORTH |= (1 << 5);
|
|
|
|
// Leave WR high for at least 50ns
|
|
__asm__("nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t");
|
|
}
|
|
|
|
// Read one byte of data from a location specified by bank and address, 00:0000
|
|
byte readBank_GPC(byte myBank, word myAddress) {
|
|
PORTL = myBank;
|
|
PORTF = myAddress & 0xFF;
|
|
PORTK = (myAddress >> 8) & 0xFF;
|
|
|
|
// Arduino running at 16Mhz -> one nop = 62.5ns -> 1000ns total
|
|
__asm__("nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t"
|
|
"nop\n\t");
|
|
|
|
// Read
|
|
byte tempByte = PINC;
|
|
return tempByte;
|
|
}
|
|
|
|
/******************************************
|
|
Game Processor RAM Cassette functions
|
|
*****************************************/
|
|
// Read RAM cassette to SD card
|
|
void readRAM_GPC() {
|
|
// Set control
|
|
dataIn();
|
|
controlIn_SNES();
|
|
|
|
// Get name, add extension and convert to char array for sd lib
|
|
createFolderAndOpenFile("SNES", "ROM", "GPC4M", "sfc");
|
|
|
|
// Read Banks
|
|
for (int currBank = 0xC0; currBank < 0xC8; currBank++) {
|
|
// Dump the bytes to SD 512B at a time
|
|
for (long currByte = 0; currByte < 65536; currByte += 512) {
|
|
draw_progressbar((currBank - 0xC0) * 0x10000 + currByte, 0x80000);
|
|
for (int c = 0; c < 512; c++) {
|
|
sdBuffer[c] = readBank_GPC(currBank, currByte + c);
|
|
}
|
|
myFile.write(sdBuffer, 512);
|
|
}
|
|
}
|
|
draw_progressbar(0x80000, 0x80000); //Finish drawing progress bar
|
|
|
|
// Close the file:
|
|
myFile.close();
|
|
println_Msg(F("Read ram completed"));
|
|
display_Update();
|
|
wait();
|
|
}
|
|
|
|
void writeRAM_GPC(void) {
|
|
//Display file Browser and wait user to select a file. Size must be 512KB.
|
|
filePath[0] = '\0';
|
|
sd.chdir("/");
|
|
fileBrowser(F("Select SFC file"));
|
|
// Create filepath
|
|
sprintf(filePath, "%s/%s", filePath, fileName);
|
|
display_Clear();
|
|
|
|
//open file on sd card
|
|
if (myFile.open(filePath, O_READ)) {
|
|
|
|
fileSize = myFile.fileSize();
|
|
if (fileSize != 0x80000) {
|
|
println_Msg(F("File must be 512KB"));
|
|
display_Update();
|
|
myFile.close();
|
|
wait();
|
|
return;
|
|
}
|
|
|
|
//Disable ram cassette write protection
|
|
dataOut();
|
|
controlOut_SNES();
|
|
for (int countProtect = 0; countProtect < 15; countProtect++) {
|
|
writeBank_GPC(0x20, 0x6000, 0x00);
|
|
}
|
|
|
|
//Write ram
|
|
dataOut();
|
|
controlOut_SNES();
|
|
println_Msg(F("Writing ram..."));
|
|
display_Update();
|
|
for (int currBank = 0xC0; currBank < 0xC8; currBank++) {
|
|
//startAddr = 0x0000
|
|
for (long currByte = 0x0000; currByte < 0x10000; currByte += 512) {
|
|
myFile.read(sdBuffer, 512);
|
|
for (unsigned long c = 0; c < 512; c++) {
|
|
//startBank = 0x10; CS low
|
|
writeBank_GPC(currBank, currByte + c, sdBuffer[c]);
|
|
}
|
|
}
|
|
draw_progressbar(((currBank - 0xC0) * 0x10000), 0x80000);
|
|
}
|
|
|
|
//reenable write protection
|
|
dataIn();
|
|
controlIn_SNES();
|
|
byte keepByte = readBank_GPC(0x20, 0x6000);
|
|
delay(100);
|
|
dataOut();
|
|
controlOut_SNES();
|
|
writeBank_GPC(0x20, 0x6000, keepByte);
|
|
|
|
draw_progressbar(0x80000, 0x80000);
|
|
delay(100);
|
|
// Set pins to input
|
|
dataIn();
|
|
|
|
// Close the file:
|
|
myFile.close();
|
|
println_Msg("");
|
|
println_Msg(F("RAM writing finished"));
|
|
display_Update();
|
|
} else {
|
|
print_Error(FS(FSTRING_FILE_DOESNT_EXIST));
|
|
}
|
|
}
|
|
|
|
// Check if the RAM was written without any error
|
|
unsigned long verifyRAM_GPC() {
|
|
//open file on sd card
|
|
if (myFile.open(filePath, O_READ)) {
|
|
// Variable for errors
|
|
writeErrors = 0;
|
|
|
|
// Set control
|
|
controlIn_SNES();
|
|
|
|
//startBank = 0xC0; endBank = 0xC7; CS low
|
|
for (byte currBank = 0xC0; currBank < 0xC8; currBank++) {
|
|
//startAddr = 0x0000
|
|
for (long currByte = 0x0000; currByte < 0x10000; currByte += 512) {
|
|
//fill sdBuffer
|
|
myFile.read(sdBuffer, 512);
|
|
for (unsigned long c = 0; c < 512; c++) {
|
|
if ((readBank_GPC(currBank, currByte + c)) != sdBuffer[c]) {
|
|
writeErrors++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// Close the file:
|
|
myFile.close();
|
|
return writeErrors;
|
|
} else {
|
|
print_Error(open_file_STR);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
//******************************************
|
|
// End of File
|
|
//******************************************
|