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Merge pull request #1055 from gemarcano/gb_minor_optimizations

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GB minor optimizations
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sanni 2025-01-07 15:58:54 +01:00 committed by GitHub
commit 72651a9cf1
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GPG Key ID: B5690EEEBB952194
1 changed files with 35 additions and 55 deletions
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90
Cart_Reader/GB.ino
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@ -71,7 +71,7 @@ bool gbxFlashCFI() {
sd.chdir("/");
// Launch filebrowser
filePath[0] = '\0';
sd.chdir("/");
fileBrowser(FS(FSTRING_SELECT_FILE));
display_Clear();
identifyCFI_GB();
@ -95,6 +95,36 @@ void feedbackPressAndReset() {
resetArduino();
}
// Common code for setting up GB port used by GB carts, Datel,
// Pelican Codebreaker, MonsterBrain
void setup_GBPort() {
// Set Address Pins to Output
//A0-A7
DDRF = 0xFF;
//A8-A15
DDRK = 0xFF;
// Set Control Pins to Output RST(PH0) CLK(PH1) CS(PH3) WR(PH5) RD(PH6)
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
PORTH |= (1 << 3) | (1 << 5) | (1 << 6);
// Output a low signal on CLK(PH1) to disable writing GB Camera RAM
// Output a low signal on RST(PH0) to initialize MMC correctly
PORTH &= ~((1 << 0) | (1 << 1));
/* FIXME setup_GB sets this up too. Should this also for Datel and others?
// Set Audio-In(PH4) to Input
DDRH &= ~(1 << 4);
// Enable Internal Pullup
PORTH |= (1 << 4);
*/
// Set Data Pins (D0-D7) to Input
DDRC = 0x00;
// Enable Internal Pullups
PORTC = 0xFF;
}
// Start menu for both GB and GBA
void gbxMenu() {
// create menu with title and 5 options to choose from
@ -368,24 +398,7 @@ void gbxMenu() {
case 4:
// Read or Write a Pelican Codebreaker or MonsterBrain
// Set Address Pins to Output
//A0-A7
DDRF = 0xFF;
//A8-A15
DDRK = 0xFF;
// Set Control Pins to Output RST(PH0) CLK(PH1) CS(PH3) WR(PH5) RD(PH6)
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
PORTH |= (1 << 3) | (1 << 5) | (1 << 6);
// Output a low signal on CLK(PH1) to disable writing GB Camera RAM
// Output a low signal on RST(PH0) to initialize MMC correctly
PORTH &= ~((1 << 0) | (1 << 1));
// Set Data Pins (D0-D7) to Input
DDRC = 0x00;
// Enable Internal Pullups
PORTC = 0xFF;
setup_GBPort();
delay(400);
@ -415,24 +428,7 @@ void gbxMenu() {
case 5:
// Read or Write a Datel Device (Mega Memory Card and Gameshark)
// Set Address Pins to Output
//A0-A7
DDRF = 0xFF;
//A8-A15
DDRK = 0xFF;
// Set Control Pins to Output RST(PH0) CLK(PH1) CS(PH3) WR(PH5) RD(PH6)
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
PORTH |= (1 << 3) | (1 << 5) | (1 << 6);
// Output a low signal on CLK(PH1) to disable writing GB Camera RAM
// Output a low signal on RST(PH0) to initialize MMC correctly
PORTH &= ~((1 << 0) | (1 << 1));
// Set Data Pins (D0-D7) to Input
DDRC = 0x00;
// Enable Internal Pullups
PORTC = 0xFF;
setup_GBPort();
delay(400);
@ -567,30 +563,14 @@ void setup_GB() {
// Request 5V
setVoltage(VOLTS_SET_5V);
// Set Address Pins to Output
//A0-A7
DDRF = 0xFF;
//A8-A15
DDRK = 0xFF;
// Set Control Pins to Output RST(PH0) CLK(PH1) CS(PH3) WR(PH5) RD(PH6)
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
PORTH |= (1 << 3) | (1 << 5) | (1 << 6);
// Output a low signal on CLK(PH1) to disable writing GB Camera RAM
// Output a low signal on RST(PH0) to initialize MMC correctly
PORTH &= ~((1 << 0) | (1 << 1));
setup_GBPort();
// FIXME for now setup_GBPort doesn't set these ones up
// Set Audio-In(PH4) to Input
DDRH &= ~(1 << 4);
// Enable Internal Pullup
PORTH |= (1 << 4);
// Set Data Pins (D0-D7) to Input
DDRC = 0x00;
// Enable Internal Pullups
PORTC = 0xFF;
delay(400);
// RST(PH0) to HIGH