#include <Arduino.h>

// Define the pins directly in the code
#define DATA_PIN 18
#define CLOCK_PIN 17

// Channel data (example data for 8 channels)
uint16_t channelData[8] = {
    0x1001,  // Channel 1
    0x2002,  // Channel 2
    0x3003,  // Channel 3
    0x4004,  // Channel 4
    0x5005,  // Channel 5
    0x6006,  // Channel 6
    0x7007,  // Channel 7
    0x8008   // Channel 8
};

const int numChannels = 8;
const int numBits = 16;
const int silenceTimeUs = 125;
const int clockPeriodNs = 653; // Approx. half period for 1.53 MHz clock (653 ns)

void setup() {
    Serial.begin(115200);
    pinMode(DATA_PIN, OUTPUT);
    pinMode(CLOCK_PIN, OUTPUT);

    digitalWrite(DATA_PIN, LOW);
    digitalWrite(CLOCK_PIN, LOW);
}

void delayNanoseconds(uint32_t ns) {
    uint32_t start = micros();
    uint32_t end = start;
    while ((end - start) * 1000 < ns) {
        end = micros();
    }
}

void transmitChannel(uint16_t data) {
    for (int i = numBits - 1; i >= 0; i--) {
        uint8_t bit = (data >> i) & 0x01;
        digitalWrite(DATA_PIN, bit);
        
        digitalWrite(CLOCK_PIN, HIGH);
        delayNanoseconds(clockPeriodNs);  // Clock high duration
        
        digitalWrite(CLOCK_PIN, LOW);
        delayNanoseconds(clockPeriodNs);  // Clock low duration
    }
}

void loop() {
    for (int i = 0; i < numChannels; i++) {
        transmitChannel(channelData[i]);
        delayMicroseconds(silenceTimeUs);  // Silence period between transmissions
    }
}