#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/gpio.h>
#include <libopencm3/stm32/usart.h>
#include <libopencm3/stm32/dma.h>
#include <libopencm3/stm32/i2c.h>
#include <libopencm3/cm3/systick.h>
#include <libopencm3/cm3/nvic.h>
#include <libopencm3/cm3/cortex.h>


#include <stdio.h>
#include <errno.h>

#include "led.h"
#include "i2c.h"

#include "ring.h"

#include "prototypes.h"