#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/stm32/adc.h>
#include <libopencm3/stm32/exti.h>
#include <libopencm3/cm3/systick.h>
#include <libopencm3/cm3/nvic.h>
#include <libopencm3/cm3/cortex.h>
#include <libopencm3/cm3/scb.h>
#include <libopencm3/cm3/dwt.h>

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

#define   TICK_BASE 9000
#define   TICK_DIV  12000
#define   TICKS_TO_US(a)  (((a)*TICK_DIV*1000)/TICK_BASE)
#define   MS_TO_TICKS(a) (((a)*1000)/TICKS_TO_US(1))

#include "pins.h"

#include "i2c.h"

#include "oled.h"

#include "ring.h"
#include "tacho.h"


#define US(a) (72*(a))
#define MS(a) (US(a)  * 1000 )
#define HZ(a) (MS(a) * 1000)


#define T do { printf("%s:%s:%d\n",__FILE__,__FUNCTION__,__LINE__); } while (0)

#include "prototypes.h"