//*****************************************************************************
//
//! @file system_apollo2.h
//!
//! @brief Ambiq Micro Apollo2 MCU specific functions.
//
//*****************************************************************************

//*****************************************************************************
//
// Copyright (c) 2017, Ambiq Micro
// All rights reserved.
// 
// 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. Neither the name of the copyright holder 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.
//
//*****************************************************************************

#ifndef SYSTEM_APOLLO2_H
#define SYSTEM_APOLLO2_H

#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>

extern uint32_t SystemCoreClock;     // System Clock Frequency (Core Clock)

//*****************************************************************************
//
// External function definitions
//
//*****************************************************************************
extern void SystemInit (void);
extern void SystemCoreClockUpdate (void);

/* Helper functions to enable/disable interrupts. */
#define __HAL_DISABLE_INTERRUPTS(x)                     \
    do {                                                \
        x = __get_PRIMASK();                            \
        __disable_irq();                                \
    } while(0);

#define __HAL_ENABLE_INTERRUPTS(x)                      \
    do {                                                \
        if (!x) {                                       \
            __enable_irq();                             \
        }                                               \
    } while(0);

#ifdef __cplusplus
}
#endif

#endif  // SYSTEM_APOLLO2_H

