delay.h

/* Teensyduino Core Library
 * http://www.pjrc.com/teensy/
 * Copyright (c) 2013 PJRC.COM, LLC.
 * Modifications by Jacob Alexander 2013-2017
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * 1. The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * 2. If the Software is incorporated into a build system that allows
 * selection among a list of target devices, then similar target
 * devices manufactured by PJRC.COM must be included in the list of
 * target devices and selectable in the same manner.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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 */

#pragma once

// ----- System Includes -----

#include <stdint.h>



// ----- Macros -----

// Convenience Macros, for delay compatibility with AVR-GCC
#define _delay_ms(val) delay_ms( val )
#define _delay_us(val) delay_us( val )



// ----- Variables -----

// The systick interrupt is supposed to increment this at 1 kHz rate
extern volatile uint32_t systick_millis_count;



// ----- Functions -----

// - Delay Functions -

void delay_cycles( uint32_t cycles );
void delay_us( uint32_t us );
void delay_ms( uint32_t ms );


// - Current Count Functions -

uint32_t cycle_now();
uint32_t us_now();
uint32_t ms_now();


// - Misc Functions -

void yield() __attribute__ ((weak));