Arduino.h

/*
 From different classes in https://github.com/arduino/ArduinoCore-avr/tree/master/cores/arduino
 */

#ifndef Arduino_h
#define Arduino_h

#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <math.h>
#include "bcm2835.h"

#define INPUT BCM2835_GPIO_FSEL_INPT
#define OUTPUT BCM2835_GPIO_FSEL_OUTP

#define PI 3.1415926535897932384626433832795
#define HALF_PI 1.5707963267948966192313216916398
#define TWO_PI 6.283185307179586476925286766559
#define DEG_TO_RAD 0.017453292519943295769236907684886
#define RAD_TO_DEG 57.295779513082320876798154814105
#define EULER 2.718281828459045235360287471352

#define SERIAL 0x0
#define DISPLAY 0x1

#define LSBFIRST BCM2835_SPI_BIT_ORDER_LSBFIRST
#define MSBFIRST BCM2835_SPI_BIT_ORDER_MSBFIRST

#define CHANGE 1
#define FALLING 2
#define RISING 3

// undefine stdlib's abs if encountered
#ifdef abs
#undef abs
#endif

#define abs(x) ((x) > 0 ? (x) : -(x))
#define constrain(amt, low, high) ((amt) < (low) ? (low) : ((amt) > (high) ? (high) : (amt)))
#define round(x) ((x) >= 0 ? (long)((x) + 0.5) : (long)((x)-0.5))
#define radians(deg) ((deg)*DEG_TO_RAD)
#define degrees(rad) ((rad)*RAD_TO_DEG)
#define sq(x) ((x) * (x))

#define clockCyclesPerMicrosecond() (F_CPU / 1000000L)
#define clockCyclesToMicroseconds(a) ((a) / clockCyclesPerMicrosecond())
#define microsecondsToClockCycles(a) ((a)*clockCyclesPerMicrosecond())

#define lowByte(w) ((uint8_t)((w)&0xff))
#define highByte(w) ((uint8_t)((w) >> 8))

#define bitRead(value, bit) (((value) >> (bit)) & 0x01)
#define bitSet(value, bit) ((value) |= (1UL << (bit)))
#define bitClear(value, bit) ((value) &= ~(1UL << (bit)))
#define bitToggle(value, bit) ((value) ^= (1UL << (bit)))
#define bitWrite(value, bit, bitvalue) ((bitvalue) ? bitSet(value, bit) : bitClear(value, bit))
#define F(s) s
#define digitalWrite(pin, val) bcm2835_gpio_write(pin, val)
#define pinMode(pin, val) bcm2835_gpio_fsel(pin, val)
#define digitalRead(pin) bcm2835_gpio_lev(pin)

typedef unsigned int word;
typedef bool boolean;
typedef uint8_t byte;

unsigned long millis(void);
unsigned long micros(void);

// // WMath prototypes