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/**
* \file
*
* \brief Common Delay Service
*
* Copyright (c) 2014-2016 Atmel Corporation. All rights reserved.
*
* \asf_license_start
*
* \page License
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The name of Atmel may not be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 4. This software may only be redistributed and used in connection with an
* Atmel microcontroller product.
*
* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* \asf_license_stop
*
*/
/*
* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
*/
#ifndef _DELAY_H_
#define _DELAY_H_
#ifdef __cplusplus
extern "C" {
#endif
#include <sysclk.h>
#if UC3
# include <cycle_counter.h>
#elif XMEGA
# include "xmega/cycle_counter.h"
#elif MEGA
# include "mega/cycle_counter.h"
#elif SAM
# include "sam/cycle_counter.h"
#endif
/**
* @defgroup group_common_services_delay Busy-Wait Delay Routines
*
* This module provides simple loop-based delay routines for those
* applications requiring a brief wait during execution. Common API
* for UC3, XMEGA, and AVR MEGA.
*
* @{
*/
/**
* @def F_CPU
* @brief MCU Clock Frequency (Hertz)
*
* @deprecated
* The \ref F_CPU configuration constant is used for compatibility with the
* \ref group_common_services_delay routines. The common loop-based delay
* routines are designed to use the \ref clk_group modules while anticipating
* support for legacy applications assuming a statically defined clock
* frequency. Applications using a statically configured MCU clock frequency
* can define \ref F_CPU (Hertz), in which case the common delay routines will
* use this value rather than calling sysclk_get_cpu_hz() to get the current
* MCU clock frequency.
*/
#ifndef F_CPU
# define F_CPU sysclk_get_cpu_hz()
#endif
/**
* @def delay_init
*
* @brief Initialize the delay driver.
* @param fcpu_hz CPU frequency in Hz
*
* @deprecated
* This function is provided for compatibility with ASF applications that
* may not have been updated to configure the system clock via the common
* clock service; e.g. sysclk_init() and a configuration header file are
* used to configure clocks.
*
* The functions in this module call \ref sysclk_get_cpu_hz() function to
* obtain the system clock frequency.
*/
#define delay_init(fcpu_hz)
/**
* @def delay_s
* @brief Delay in seconds.
* @param delay Delay in seconds
*/
#define delay_s(delay) ((delay) ? cpu_delay_ms(1000 * delay, F_CPU) : cpu_delay_us(1, F_CPU))
/**
* @def delay_ms
* @brief Delay in milliseconds.
* @param delay Delay in milliseconds
*/
#define delay_ms(delay) ((delay) ? cpu_delay_ms(delay, F_CPU) : cpu_delay_us(1, F_CPU))
/**
* @def delay_us
* @brief Delay in microseconds.
* @param delay Delay in microseconds
*/
#define delay_us(delay) ((delay) ? cpu_delay_us(delay, F_CPU) : cpu_delay_us(1, F_CPU))
#ifdef __cplusplus
}
#endif
/**
* @}
*/
#endif /* _DELAY_H_ */
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