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