OVR7670 FIFO Read to Serial

gistfile1.ino

#include <avr/io.h>
#include <avr/interrupt.h>

//
// RCLK		2
// VSYNC	3
// D0-D4	A0-A3
// D5-D8	4-7
// WE 		8
// WRST		9
// RRST		10
//

void setup() {
	// Pins 8 - 13
	DDRB = DDRB | B011101;

	// Pins A0 - A5
	DDRC = DDRC | B000000;

	// Pins 0 - 7
	DDRD = DDRD | B00000100;

	Serial.begin(115200);

	while (1) {
		cli(); //make sure interrupts are off

		while(!(PIND & B00001000)); // Wait for high VSYNC
		while((PIND & B00001000)); // Wait for low VSYNC

		PORTB &= B111101; // digitalWrite(WRST, LOW);

		delayMicroseconds(100);

		PORTB |= B000010; // digitalWrite(WRST, HIGH);
		PORTB |= B000001; // digitalWrite(WE, HIGH);

		while(!(PIND & B00001000)); // Wait for high VSYNC

		PORTB &= B000000; // digitalWrite(WE, LOW);

		sei();

		digitalWrite(10, LOW); // digitalWrite(RRST, LOW)

		PORTD &= B11111011; // digitalWrite(RCLK, LOW);
		PORTD |= B00000100; // digitalWrite(RCLK, HIGH);
		PORTD &= B11111011; // digitalWrite(RCLK, LOW);
		PORTD |= B00000100; // digitalWrite(RCLK, HIGH);
		PORTD &= B11111011; // digitalWrite(RCLK, LOW);

		for (uint16_t i = 0; i <= 19200; i++) {
			PORTD |= B00000100; // digitalWrite(RCLK, HIGH);

			unsigned char data = ((PINC & B00001111) | (PIND & B11110000));

			Serial.write(data);

			PORTD &= B11111011; // digitalWrite(RCLK, LOW);
		}
	}
}

void loop() {
    
}