#define CIRCULAR_BUFFER_SIZE 16

extern "C" {
  void circular_buffer_init(void);
  uint8_t circular_buffer_write(uint8_t data);
  uint8_t circular_buffer_read(void);
  uint8_t circular_buffer_count(void);
}

//---------------------------------------------


void setup() {
  // put your setup code here, to run once:
  circular_buffer_init();
  Serial.begin(115200);
  uint8_t circularBufferCount = circular_buffer_count();
  while (circularBufferCount < CIRCULAR_BUFFER_SIZE) {
    uint8_t randomVal = random(0x100);
    circularBufferCount = circular_buffer_write(randomVal); // Write a test byte
    Serial.print(circularBufferCount);
    Serial.print(": ");
    Serial.println(randomVal, HEX);
  }

  while (circular_buffer_count()) {
    Serial.println(circular_buffer_read(), HEX); // Print the byte
  }
}

void loop() {
  // put your main code here, to run repeatedly:

}