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V19J: Added reading/writing of GBA 64K eeprom save games

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sanni 2016-10-15 21:46:30 +02:00 committed by GitHub
parent 77f4422237
commit c95ec351ea
2 changed files with 28 additions and 33 deletions
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6
Cart_Reader/Cart_Reader.ino
View File

@ -3,7 +3,7 @@
Author: sanni
Date: 2016-10-15
Version: V19I
Version: V19J
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] = "V19I";
char ver[5] = "V19J";
/******************************************
Define Output
@ -201,7 +201,7 @@ int foldern;
char folder[24];
// Array that holds the data
byte sdBuffer[1024];
byte sdBuffer[512];
//******************************************
// Bitmaps

41
Cart_Reader/GBA.ino
View File

@ -120,8 +120,7 @@ void gbaMenu() {
display_Clear();
sd.chdir("/");
// 64K EEPROM
print_Error(F("Not supported yet"), false);
//readEeprom_GBA(64);
readEeprom_GBA(64);
setROM_GBA();
break;
@ -198,8 +197,7 @@ void gbaMenu() {
display_Clear();
sd.chdir("/");
// 64K EEPROM
print_Error(F("Not supported yet"), false);
/*writeEeprom_GBA(64);
writeEeprom_GBA(64);
writeErrors = verifyEEP_GBA(64);
if (writeErrors == 0) {
println_Msg(F("Verified OK"));
@ -210,7 +208,7 @@ void gbaMenu() {
print_Msg(writeErrors);
println_Msg(F(" bytes "));
print_Error(F("did not verify."), false);
}*/
}
setROM_GBA();
break;
@ -381,7 +379,7 @@ void setROM_GBA() {
PORTH |= (1 << 0) | (1 << 3) | (1 << 5) | (1 << 6);
// Wait until all is stable
delay(500);
delay(200);
}
void setAddress_GBA(unsigned long myAddress) {
@ -1313,10 +1311,9 @@ void writeEeprom_GBA(word eepSize) {
//open file on sd card
if (myFile.open(filePath, O_READ)) {
for (word i = 0; i < eepSize * 16; i += 64) {
// Fill romBuffer
myFile.read(sdBuffer, 512);
for (word i = 0; i < eepSize * 16; i += 64) {
// Disable interrupts for more uniform clock pulses
noInterrupts();
// Write 512 bytes
@ -1370,21 +1367,19 @@ void readEeprom_GBA(word eepSize) {
print_Error(F("SD Error"), true);
}
for (word i = 0; i < eepSize * 16; i += 64) {
// Each block contains 8 Bytes, so for a 8KB eeprom 1024 blocks need to be read
for (word currAddress = 0; currAddress < eepSize * 16; currAddress += 64) {
// Disable interrupts for more uniform clock pulses
noInterrupts();
// Fill sd Buffer
readBlock_EEP(i, eepSize);
readBlock_EEP(currAddress, eepSize);
interrupts();
// Write sdBuffer to file
myFile.write(sdBuffer, 512);
// Wait
delayMicroseconds(200);
// Seek to a new position in the file
if (i != 0)
myFile.seekCur(i * 64);
// Write sdBuffer to file
myFile.write(sdBuffer, 512);
}
myFile.close();
}
@ -1463,7 +1458,7 @@ void writeBlock_EEP(word startAddr, word eepSize) {
// Send data
for (byte currByte = 0; currByte < 8; currByte++) {
send_GBA(sdBuffer[currAddr * 8 + currByte], 8);
send_GBA(sdBuffer[(currAddr - startAddr) * 8 + currByte], 8);
}
// Send stop bit
@ -1603,19 +1598,19 @@ unsigned long verifyEEP_GBA(word eepSize) {
}
// Fill sd Buffer
for (word i = 0; i < eepSize * 16; i += 64) {
for (word currAddress = 0; currAddress < eepSize * 16; currAddress += 64) {
// Disable interrupts for more uniform clock pulses
noInterrupts();
readBlock_EEP(i, eepSize);
readBlock_EEP(currAddress, eepSize);
interrupts();
}
// Compare
for (int c = 0; c < eepSize * 16; c++) {
if (sdBuffer[c] != myFile.read()) {
for (int currByte = 0; currByte < 512; currByte++) {
if (sdBuffer[currByte] != myFile.read()) {
wrError++;
}
}
}
myFile.close();
return wrError;
}