pixelreadtest.cpp

#include <Arduino.h>

#define clk_out 10
#define clk_in 9

uint8_t data;
unsigned long count;

elapsedMillis time;

inline uint8_t readPixel() {
    return (GPIO6_PSR & 0b00000000'00000000'00000000'00001100) >> 2  | // 1, 0
           (GPIO6_PSR & 0b00000000'00001111'00000000'00000000) >> 14 | // 19, 18, 14, 15
           (GPIO6_PSR & 0b00001100'00000000'00000000'00000000) >> 20;  // 20, 21
}

inline bool clk() {
    return digitalReadFast(clk_in);
    // return (CORE_PIN10_PINREG & CORE_PIN10_BITMASK) ? 1 : 0;
}

inline bool href() {
    return 0;
}

inline bool vsync() {
    return 0;
}

void setup() {
    Serial.begin(115200);
    while(!Serial);
    pinMode(clk_out, OUTPUT);
    pinMode(clk_in, INPUT);
    analogWriteFrequency(clk_out, 50'000'000);
    analogWrite(clk_out, 127);
    Serial.println("Setup done.");
}

void loop() {
    time = 0;
    count = 0;
    while(time < 1000) {
        while(clk());
        data = readPixel();
        count++;
        while(!clk());
    }
    Serial.println(count);
}