antoniond / gbcam-rev-engineer Goto Github PK

I stumbled across this repo, and I'm very impressed.

The idea occurred to me to use the Game Boy Camera as a webcam, by connecting the cartridge to a Teensy and using something like teensy_uvc to show it as a webcam. I'd have to get the actual camera second hand, so it's just idle thought.

Anyway, I was reading through your repo, and had some questions:

• What kind of Arduino is used? Just a Uno?
• What is the function of the Due helper?
• Is a shift register used for the address lines?
• What is the function of sensor_read_pin and sensor_vout_pin and how are they connected?

Hello, I believe I've arrived a bit late to the project, I hope you're still around. I'm working on a project with Flipper Zero and an ESP32-S2, which has enough pins to read a Game Boy cartridge.

I've successfully managed to read the images stored in the cartridge's RAM and display them on the Flipper's 128x64 screen.

Game Boy	Flipper Zero

Now, I wanted to capture photos from the FZ or maybe even do a live video with the GAME BOY Camera, but half of the time, I'm not sure what I'm doing, and I get lost in many parts.

Could you please provide a detailed explanation of what the processClocks method does?

Or, if it's possible, could it be written in Arduino code instead of assembly, like in the following?

// Address pins
const static uint32_t ADDRESS_GB_GBC_PINS[16] = 
{
    GAMEBOY_A00,
    GAMEBOY_A01,
    GAMEBOY_A02,
    GAMEBOY_A03,
    GAMEBOY_A04,
    GAMEBOY_A05,
    GAMEBOY_A06,
    GAMEBOY_A07,

    GAMEBOY_A08,
    GAMEBOY_A09,
    GAMEBOY_A10,
    GAMEBOY_A11,
    GAMEBOY_A12,
    GAMEBOY_A13,
    GAMEBOY_A14,
    GAMEBOY_A15
};
// Data pins
const static uint32_t DATA_GB_GBC_PINS[8] = 
{
    GAMEBOY_D00,
    GAMEBOY_D01,
    GAMEBOY_D02,
    GAMEBOY_D03,
    GAMEBOY_D04,
    GAMEBOY_D05,
    GAMEBOY_D06,
    GAMEBOY_D07
};

void generatePulse() {
  digitalWrite(phi_pin, HIGH);
  __asm__("nop\n\t"
          "nop\n\t"
          "nop\n\t"
          "nop\n\t"
          "nop\n\t"
          "nop\n\t");
  digitalWrite(phi_pin, LOW);
  __asm__("nop\n\t"
          "nop\n\t");

}
// ... bla
noInterrupts();
generatePulse();
int raw_data = digitalRead(DATA_GB_GBC_PINS[0]);
while (raw_data == 1) {
    generatePulse();
    raw_data = digitalRead(DATA_GB_GBC_PINS[0]);
}
interrupts();

I hope you can assist me; I believe I'm very close to achieving it 🙏 ... or maybe quite far, haha. I say "quite far" because the CPU frequency of the ESP32 is much higher than that of an Arduino (240MHz), and I'm not sure if it will work 🤔.

Add the location of the big and small pictures that are saved in the cartridge. It's not really related to how the GB camera works, but some people may find it useful.