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Improve compatibility with FRAM mods

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sanni 2021-12-29 11:55:27 +01:00
parent 2a61c59599
commit 47812606aa
1 changed files with 11 additions and 11 deletions
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22
Cart_Reader/GB.ino
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@ -316,10 +316,10 @@ void setup_GB() {
//A8-A15 //A8-A15
DDRK = 0xFF; DDRK = 0xFF;
// Set Control Pins to Output RST(PH0) CS(PH3) WR(PH5) RD(PH6) // Set Control Pins to Output RST(PH0) CLK(PH1) CS(PH3) WR(PH5) RD(PH6)
DDRH |= (1 << 0) | (1 << 3) | (1 << 5) | (1 << 6); DDRH |= (1 << 0) | (1 << 1) | (1 << 3) | (1 << 5) | (1 << 6);
// Output a high signal on all pins, pins are active low therefore everything is disabled now // Output a high signal on all pins, pins are active low therefore everything is disabled now
PORTH |= (1 << 0) | (1 << 3) | (1 << 5) | (1 << 6); PORTH |= (1 << 0) | (1 << 1) | (1 << 3) | (1 << 5) | (1 << 6);
// Set Data Pins (D0-D7) to Input // Set Data Pins (D0-D7) to Input
DDRC = 0x00; DDRC = 0x00;
@ -479,8 +479,8 @@ byte readByteSRAM_GB(word myAddress) {
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t"); __asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Pull CS(PH3) LOW // Pull CS(PH3) CLK(PH1)(for FRAM MOD) LOW
PORTH &= ~(1 << 3); PORTH &= ~((1 << 3) | (1 << 1));
// Pull RD(PH6) LOW // Pull RD(PH6) LOW
PORTH &= ~(1 << 6); PORTH &= ~(1 << 6);
@ -489,8 +489,8 @@ byte readByteSRAM_GB(word myAddress) {
// Read // Read
byte tempByte = PINC; byte tempByte = PINC;
// Pull CS(PH3) HIGH // Pull CS(PH3) CLK(PH1)(for FRAM MOD) HIGH
PORTH |= (1 << 3); PORTH |= (1 << 3) | (1 << 1);
// Pull RD(PH6) HIGH // Pull RD(PH6) HIGH
PORTH |= (1 << 6); PORTH |= (1 << 6);
@ -506,8 +506,8 @@ void writeByteSRAM_GB(int myAddress, uint8_t myData) {
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t"); __asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Pull CS(PH3) LOW // Pull CS(PH3) CLK(PH1)(for FRAM MOD) LOW
PORTH &= ~(1 << 3); PORTH &= ~((1 << 3) | (1 << 1));
// Pull WR(PH5) low // Pull WR(PH5) low
PORTH &= ~(1 << 5); PORTH &= ~(1 << 5);
@ -516,8 +516,8 @@ void writeByteSRAM_GB(int myAddress, uint8_t myData) {
// Pull WR(PH5) HIGH // Pull WR(PH5) HIGH
PORTH |= (1 << 5); PORTH |= (1 << 5);
// Pull CS(PH3) HIGH // Pull CS(PH3) CLK(PH1)(for FRAM MOD) HIGH
PORTH |= (1 << 3); PORTH |= (1 << 3) | (1 << 1);
// Leave WE high for at least 50ns // Leave WE high for at least 50ns
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t"); __asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");