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/******************************************************************************
* The MIT License
*
* Copyright (c) 2010 Perry Hung.
*
* 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:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* 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 BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*****************************************************************************/
/**
* @file util.h
* @brief Miscellaneous utility macros and procedures.
*/
#include "libmaple_types.h"
#ifndef _UTIL_H_
#define _UTIL_H_
#ifdef __cplusplus
extern "C"{
#endif
/*
* Bit manipulation
*/
#define BIT(shift) (1UL << (shift))
#define BIT_MASK_SHIFT(mask, shift) ((mask) << (shift))
/* Bits m to n of x */
#define GET_BITS(x, m, n) ((((uint32)x) << (31 - (n))) >> ((31 - (n)) + (m)))
#define IS_POWER_OF_TWO(v) (v && !(v & (v - 1)))
/*
* Register reads and writes
*/
#define __read(reg) (*(volatile uint32*)(reg))
#define __write(reg, value) (*(volatile uint32*)(reg) = (value))
/*
* Failure routines
*/
void __error(void);
void _fail(const char*, int, const char*);
void throb(void);
/*
* Asserts and debug levels
*/
#define DEBUG_NONE 0
#define DEBUG_FAULT 1
#define DEBUG_ALL 2
#ifndef DEBUG_LEVEL
#define DEBUG_LEVEL DEBUG_ALL
#endif
#if DEBUG_LEVEL >= DEBUG_ALL
#define ASSERT(exp) \
if (exp) { \
} else { \
_fail(__FILE__, __LINE__, #exp); \
}
#else
#define ASSERT(exp) (void)((0))
#endif
#if DEBUG_LEVEL >= DEBUG_FAULT
#define ASSERT_FAULT(exp) \
if (exp) { \
} else { \
_fail(__FILE__, __LINE__, #exp); \
}
#else
#define ASSERT_FAULT(exp) (void)((0))
#endif
#ifdef __cplusplus
} // extern "C"
#endif
#endif
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