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V19H: Added reading of GBA 4K eeprom save games

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Eeprom chip: 9853
This commit is contained in:
sanni 2016-10-14 19:35:37 +02:00 committed by GitHub
parent 027763940a
commit 80017521f2
2 changed files with 183 additions and 4 deletions
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6
Cart_Reader/Cart_Reader.ino
View File

@ -2,8 +2,8 @@
Cartridge Reader for Arduino Mega2560
Author: sanni
Date: 2016-10-07
Version: V19G
Date: 2016-10-14
Version: V19H
SD lib: https://github.com/greiman/SdFat
LCD lib: https://github.com/adafruit/Adafruit_SSD1306
@ -34,7 +34,7 @@
YamaArashi - GBA flashrom bank switch command
**********************************************************************************/
char ver[5] = "V19G";
char ver[5] = "V19H";
/******************************************
Define Output

181
Cart_Reader/GBA.ino
View File

@ -113,7 +113,7 @@ void gbaMenu() {
display_Clear();
sd.chdir("/");
// 4K EEPROM
print_Error(F("Not supported yet"), false);
readEeprom_GBA(4);
setROM_GBA();
break;
@ -122,6 +122,7 @@ void gbaMenu() {
sd.chdir("/");
// 64K EEPROM
print_Error(F("Not supported yet"), false);
//readEeprom_GBA(64);
setROM_GBA();
break;
@ -404,6 +405,7 @@ void readRand_GBA(unsigned long myAddress, byte myArray[] , int numBytes) {
myArray[currByte] = (currWord >> 8) & 0xFF;
myArray[currByte + 1] = currWord & 0xFF;
}
// setROM_GBA without delay
// Set address/data pins to OUTPUT
// AD0-AD7
@ -1271,6 +1273,183 @@ void verifyFLASH_GBA(unsigned long flashSize, uint32_t pos) {
}
}
/******************************************
GBA Eeprom SAVE Functions
*****************************************/
// Read eeprom to file
void readEeprom_GBA(word eepSize) {
// Get name, add extension and convert to char array for sd lib
strcpy(fileName, romName);
strcat(fileName, ".eep");
// create a new folder for the save file
EEPROM_readAnything(0, foldern);
sprintf(folder, "SAVE/%s/%d", romName, foldern);
sd.mkdir(folder, true);
sd.chdir(folder);
// Signal end of process
print_Msg(F("Reading to SAVE/"));
print_Msg(romName);
print_Msg(F("/"));
print_Msg(foldern);
print_Msg(F("/"));
print_Msg(fileName);
print_Msg(F("..."));
display_Update();
// write new folder number back to eeprom
foldern = foldern + 1;
EEPROM_writeAnything(0, foldern);
//open file on sd card
if (!myFile.open(fileName, O_RDWR | O_CREAT)) {
print_Error(F("SD Error"), true);
}
for (word i = 0; i < eepSize * 16; i += 64) {
// Disable interrupts for more uniform clock pulses
noInterrupts();
// Fill sd Buffer
readBlock_EEP(i, eepSize);
interrupts();
// Wait
delayMicroseconds(200);
// Seek to a new position in the file
if (i != 0)
myFile.seekCur(i * 64);
// Write sdBuffer to file
myFile.write(cartBuffer, 512);
}
myFile.close();
}
// Send address as bits to eeprom
void setAddress_EEP(word currAddr, word numBits) {
for (word addrBit = numBits; addrBit > 0; addrBit--) {
// If you want the k-th bit of n, then do
// (n & ( 1 << k )) >> k
if (((currAddr & ( 1 << (addrBit - 1))) >> (addrBit - 1))) {
// Set A0(PF0) to High
PORTF |= (1 << 0);
// Set WR(PH5) to LOW
PORTH &= ~ (1 << 5);
// Set WR(PH5) to High
PORTH |= (1 << 5);
}
else {
// Set A0(PF0) to Low
PORTF &= ~ (1 << 0);
// Set WR(PH5) to LOW
PORTH &= ~ (1 << 5);
// Set WR(PH5) to High
PORTH |= (1 << 5);
}
}
}
// Reads 512 bytes from eeprom
void readBlock_EEP(word startAddress, word eepSize) {
// Setup
// Set CS_ROM(PH3) WR(PH5) RD(PH6) to Output
DDRH |= (1 << 3) | (1 << 5) | (1 << 6);
// Set A0(PF0) to Output
DDRF |= (1 << 0);
// Set A23/D7(PC7) to Output
DDRC |= (1 << 7);
// Set CS_ROM(PH3) WR(PH5) RD(PH6) to High
PORTH |= (1 << 3) | (1 << 5) | (1 << 6);
// Set A0(PF0) to High
PORTF |= (1 << 0);
// Set A23/D7(PC7) to High
PORTC |= (1 << 7);
__asm__("nop\n\t""nop\n\t");
// Read 64*8=512 bytes
for (word currAddr = startAddress; currAddr < startAddress + 64; currAddr++) {
// Set CS_ROM(PH3) to LOW
PORTH &= ~ (1 << 3);
// Send read request "11"
// Set A0(PF0) to High
PORTF |= (1 << 0);
// Set WR(PH5) to LOW
PORTH &= ~ (1 << 5);
// Set WR(PH5) to High
PORTH |= (1 << 5);
// Set WR(PH5) to LOW
PORTH &= ~ (1 << 5);
// Set WR(PH5) to High
PORTH |= (1 << 5);
// Send either 6 or 14 bit address
if (eepSize == 4) {
setAddress_EEP(currAddr, 6);
}
else {
setAddress_EEP(currAddr, 14);
}
// Send stop bit
// Set A0(PF0) to LOW
PORTF &= ~ (1 << 0);
// Set WR(PH5) to LOW
PORTH &= ~ (1 << 5);
// WR(PH5) to High
PORTH |= (1 << 5);
// Set CS_ROM(PH3) to High
PORTH |= (1 << 3);
__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");
// Read data
// Set A0(PF0) to Input
DDRF &= ~ (1 << 0);
// Set CS_ROM(PH3) to low
PORTH &= ~(1 << 3);
// Array that holds the bits
bool tempBits[65];
// Ignore the first 4 bits
for (byte i = 0; i < 4; i++) {
// Set RD(PH6) to LOW
PORTH &= ~ (1 << 6);
// Set RD(PH6) to High
PORTH |= (1 << 6);
}
// Read the remaining 64bits into array
for (byte currBit = 0; currBit < 64; currBit++) {
// Set RD(PH6) to LOW
PORTH &= ~ (1 << 6);
// Set RD(PH6) to High
PORTH |= (1 << 6);
// Read bit from A0(PF0)
tempBits[currBit] = (PINF & 0x1);
}
// Set CS_ROM(PH3) to High
PORTH |= (1 << 3);
// Set A0(PF0) to High
PORTF |= (1 << 0);
// Set A0(PF0) to Output
DDRF |= (1 << 0);
// OR 8 bits into one byte for a total of 8 bytes
for (byte j = 0; j < 64; j += 8) {
cartBuffer[((currAddr - startAddress) * 8) + (j / 8)] = tempBits[0 + j] << 7 | tempBits[1 + j] << 6 | tempBits[2 + j] << 5 | tempBits[3 + j] << 4 | tempBits[4 + j] << 3 | tempBits[5 + j] << 2 | tempBits[6 + j] << 1 | tempBits[7 + j];
}
}
}
//******************************************
// End of File
//******************************************