mrvoltz real code

#line 1 "sketch_dec20b.ino"

#define PIN_RST 8
#define PIN_CLK 9
#define PIN_X0 12
#define PIN_X1 11
#define PIN_X2 10
#define PIN_LEFT 7
#define PIN_RIGHT 6

#include "Arduino.h"
void clearBuffer();
inline void writeN(uint8_t n);
void printBuffer();
void setup();
void renderSnake();
void getNewCoords(coords *coords);
void moveSnake();
void loop();
#line 10
uint8_t framebuffer[3] = { 0, 0, 0 };

void clearBuffer() {
  for(uint8_t x = 0; x < 3; x++) {
    framebuffer[x] = 0;
  }
}
inline void writeN(uint8_t n) {
  digitalWrite(PIN_RST, 1);
  digitalWrite(PIN_RST, 0);
  for(; n > 0; n--) {
      digitalWrite(PIN_CLK, 0);
      digitalWrite(PIN_CLK, 1);
  }
}
void printBuffer() {
  digitalWrite(PIN_X1, 0);
  digitalWrite(PIN_X2, 0);
  digitalWrite(PIN_X0, 0);
  writeN(framebuffer[0]);
  digitalWrite(PIN_X0, 1);
  delay(7);
  digitalWrite(PIN_X0, 0);
  writeN(framebuffer[1]);
  digitalWrite(PIN_X1, 1);
  delay(7);
  digitalWrite(PIN_X1, 0);
  writeN(framebuffer[2]);
  digitalWrite(PIN_X2, 1);
  delay(7);
}
void setup() {
  pinMode(PIN_RST, OUTPUT);
  pinMode(PIN_CLK, OUTPUT);
  pinMode(PIN_X0, OUTPUT);
  pinMode(PIN_X1, OUTPUT);
  pinMode(PIN_X2, OUTPUT);

  digitalWrite(PIN_RST, 0);
  digitalWrite(PIN_CLK, 0);
}

#ifdef SNAKE
  #define SNAKE_LENGTH 2

  typedef struct {
    uint8_t x;
    uint8_t y;
  } coords;
  typedef enum {
    up, right, down, left
  } direction;

  direction snake_direction = down;
  coords snake[SNAKE_LENGTH] = {
    { 0, 0 },
    { 0, 1 }
  };

  void renderSnake() {
    for(uint8_t i = 0; i < SNAKE_LENGTH; i++) {
      framebuffer[snake[i].x] |= 1 << snake[i].y;
    }
  }
  void getNewCoords(coords *coords) {
    if(snake_direction == up) {
      coords->y --;
    } else if(snake_direction == down) {
      coords->y ++;
    } else if(snake_direction == right) {
      coords->x ++;
    } else if(snake_direction == left) {
      coords->x --;
    }

    if(coords->y == 5)
      coords->y = 0;
    else if(coords->y == 255)
      coords->y = 4;

    if(coords->x == 3)
      coords->x = 0;
    else if(coords->x == 255)
      coords->x = 2;
  }
  void moveSnake() {
    coords tmp;

    for(uint8_t i = 0; i < SNAKE_LENGTH - 1; i++) {
      snake[i] = snake[i + 1];
    }

    tmp = snake[SNAKE_LENGTH - 2];
    getNewCoords(&tmp);
    snake[SNAKE_LENGTH - 1] = tmp;
  }

  long next_check_tick = millis();
  long next_move_tick = millis();
  void loop() {
    if(millis() > next_check_tick && digitalRead(PIN_LEFT) == LOW) {
      if(snake_direction == up) snake_direction = left;
      else if(snake_direction == left) snake_direction = down;
      else if(snake_direction == down) snake_direction = right;
      else snake_direction = up;

      next_check_tick = millis() + 250;
    } else if(millis() > next_check_tick && digitalRead(PIN_RIGHT) == LOW) {
      if(snake_direction == up) snake_direction = right;
      else if(snake_direction == left) snake_direction = up;
      else if(snake_direction == down) snake_direction = left;
      else snake_direction = down;

      next_check_tick = millis() + 250;
    }

    if(millis() > next_move_tick) {
      moveSnake();
      clearBuffer();
      renderSnake();

      next_move_tick = millis() + 250;
    }
    printBuffer();
  }
#endif