 volatile uint16_t pwm_lengths[] = { 0x30, 0x10, 0x06 }; // PWM cycle lengths
 uint8_t pwm_i = 0; // Current PWM cycle
 volatile uint8_t spi_row_change = false;
+volatile uint8_t driving_readiness = 1;
 
 // Hardware configuration
 #define PIN_COL_BIT0 A2

		digitalWrite(PIN_ROW_LATCH, HIGH);
		spi_row_change = false;
		screen_on();
	}
}

inline static void set_pixel(uint8_t *plane);
static void screen_on(void);
inline static void pick_column(void);
static void try_drive_screen(void);

void buf_swap(void) {
	uint8_t (*tmp)[56] = buf_front;
