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Remove toggling CS in GB flash function

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sanni 2022-04-11 00:28:18 +02:00
parent 1cc7712b9e
commit b501556954
2 changed files with 23 additions and 24 deletions
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2
Cart_Reader/Cart_Reader.ino
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@ -4,7 +4,7 @@
This project represents a community-driven effort to provide
an easy to build and easy to modify cartridge dumper.
Date: 10.04.2022
Date: 11.04.2022
Version: 8.2
SD lib: https://github.com/greiman/SdFat

45
Cart_Reader/GB.ino
View File

@ -532,17 +532,17 @@ void writeByte_GB(int myAddress, byte myData) {
// Pull WR(PH5) low
PORTH &= ~(1 << 5);
// Leave WE low for at least 60ns
// Leave WR low for at least 60ns
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Pull WR(PH5) HIGH
PORTH |= (1 << 5);
// Leave WE high for at least 50ns
// Leave WR high for at least 50ns
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
}
// Triggers CLK pin
// Triggers CS and CLK pin
byte readByteSRAM_GB(word myAddress) {
PORTF = myAddress & 0xFF;
PORTK = (myAddress >> 8) & 0xFF;
@ -574,7 +574,7 @@ byte readByteSRAM_GB(word myAddress) {
return tempByte;
}
// Triggers CLK pin
// Triggers CS and CLK pin
void writeByteSRAM_GB(int myAddress, byte myData) {
PORTF = myAddress & 0xFF;
PORTK = (myAddress >> 8) & 0xFF;
@ -597,7 +597,7 @@ void writeByteSRAM_GB(int myAddress, byte myData) {
PORTH &= ~(1 << 5);
}
// Leave WE low for at least 60ns
// Leave WR low for at least 60ns
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
if (romType == 252) {
@ -615,7 +615,7 @@ void writeByteSRAM_GB(int myAddress, byte myData) {
PORTH |= (1 << 3) | (1 << 1);
}
// Leave WE high for at least 50ns
// Leave WR high for at least 50ns
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
}
@ -1172,20 +1172,19 @@ void writeFlash29F_GB(byte MBC, boolean flashErase) {
writeByte_GB(0x2aa, 0x55);
writeByte_GB(0x555, 0x10);
dataIn_GB();
// Set data pins to input
dataIn();
// Read the status register
byte statusReg = readByte_GB(0);
// Set OE/RD(PH6) LOW
PORTH &= ~(1 << 6);
// After a completed erase D7 will output 1
while ((statusReg & 0x80) != 0x80) {
// Blink led
blinkLED();
delay(100);
// Update Status
statusReg = readByte_GB(0);
while ((PINC & 0x80) != 0x80) {
}
// Switch OE/RD(PH6) to HIGH
PORTH |= (1 << 6);
// Blankcheck
println_Msg(F("Blankcheck"));
display_Update();
@ -1256,15 +1255,15 @@ void writeFlash29F_GB(byte MBC, boolean flashErase) {
// Set data pins to input
dataIn();
// Setting CS(PH3) and OE/RD(PH6) LOW
PORTH &= ~((1 << 3) | (1 << 6));
// Set OE/RD(PH6) LOW
PORTH &= ~(1 << 6);
// Busy check
while ((PINC & 0x80) != (sdBuffer[currByte] & 0x80)) {
}
// Switch CS(PH3) and OE/RD(PH6) to HIGH
PORTH |= (1 << 3) | (1 << 6);
// Switch OE/RD(PH6) to HIGH
PORTH |= (1 << 6);
// Set data pins to output
dataOut();
@ -1311,15 +1310,15 @@ void writeFlash29F_GB(byte MBC, boolean flashErase) {
// Set data pins to input
dataIn();
// Setting CS(PH3) and OE/RD(PH6) LOW
PORTH &= ~((1 << 3) | (1 << 6));
// Set OE/RD(PH6) LOW
PORTH &= ~(1 << 6);
// Busy check
while ((PINC & 0x80) != (sdBuffer[currByte] & 0x80)) {
}
// Switch CS(PH3) and OE/RD(PH6) to HIGH
PORTH |= (1 << 3) | (1 << 6);
// Switch OE/RD(PH6) to HIGH
PORTH |= (1 << 6);
// Set data pins to output
dataOut();