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/*
* Copyright (c) 2011-2012, Freescale Semiconductor, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* o 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.
*
* o Neither the name of Freescale Semiconductor, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS 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.
*/
//! @addtogroup diag_timer
//! @{
/*!
* @file timer.h
* @brief various defines used by the timer driver.
*/
#ifndef __TIMER_H__
#define __TIMER_H__
#include "sdk.h"
////////////////////////////////////////////////////////////////////////////////
// Constants
////////////////////////////////////////////////////////////////////////////////
//! @brief Options for low power mode support for the timers.
//!
//! These constants are bit masks that are or'd together to select in which low
//! power modes the timer will continue counting.
enum _timer_low_power_modes
{
WAIT_MODE_EN = 1, //!< Timer is enabled in wait mode.
STOP_MODE_EN = 2 //!< Timer is enabled in stop mode.
};
//! @brief Available clock sources for the timers.
enum _timer_clock_sources
{
CLKSRC_OFF = 0, //!< clock source is OFF
CLKSRC_IPG_CLK = 1, //!< clock source is peripheral clock
CLKSRC_PER_CLK = 2, //!< clock source is high-freq reference clock
CLKSRC_CLKIN = 3, //!< clock source is external from a CLKIN input
CLKSRC_CKIL = 3 //!< clock source is low-freq reference clock
};
//! @brief Do not enable interrupts.
#define POLLING_MODE 0
////////////////////////////////////////////////////////////////////////////////
// Externs
////////////////////////////////////////////////////////////////////////////////
extern uint32_t g_system_timer_port;
////////////////////////////////////////////////////////////////////////////////
// API
////////////////////////////////////////////////////////////////////////////////
#if defined(__cplusplus)
extern "C" {
#endif
//! @brief Delay for a given number of microseconds.
//!
//! system_time_init() must have been called before using this function.
//!
//! @param usecs Delay in microseconds.
void hal_delay_us(uint32_t usecs);
//! @brief Init system timer facilities.
//!
//! Inits the EPIT timer used for delay, and inits the microsecond counter.
void system_time_init(void);
//! @brief Return the current microsecond counter value.
//!
//! @return The number of microseconds elapsed since system_time_init()
//! was called. This value may roll over before reaching all ones.
uint64_t time_get_microseconds();
#if defined(__cplusplus)
}
#endif
//! @}
#endif // __TIMER_H__
////////////////////////////////////////////////////////////////////////////////
// EOF
////////////////////////////////////////////////////////////////////////////////
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