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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 Various macros and utility procedures.
*/
/* Generally "useful" utility procedures */
#ifndef _UTIL_H_
#define _UTIL_H_
#define MAPLE_DEBUG 0
#define BIT(shift) (1 << (shift))
#define BIT_MASK_SHIFT(mask, shift) ((mask) << (shift))
/* Return bits m to n of x */
#define GET_BITS(x, m, n) ((((uint32)x) << (31 - (n))) >> ((31 - (n)) + (m)))
/* Bit-banding macros */
#define BITBAND_SRAM_REF 0x20000000
#define BITBAND_SRAM_BASE 0x22000000
#define BITBAND_SRAM(a,b) ((BITBAND_SRAM_BASE + (a-BITBAND_SRAM_REF)*32 + (b*4))) // Convert SRAM address
#define BITBAND_PERI_REF 0x40000000
#define BITBAND_PERI_BASE 0x42000000
#define BITBAND_PERI(a,b) ((BITBAND_PERI_BASE + (a-BITBAND_PERI_REF)*32 + (b*4))) // Convert PERI address
#define COUNTFLAG *((volatile unsigned char*) (BITBAND_PERI(SYSTICK_CSR,2)))
#define REG_SET(reg, val) (*(volatile uint32*)(reg) = (val))
#define REG_SET_BIT(reg, bit) (*(volatile uint32*)(reg) |= BIT(bit))
#define REG_CLEAR_BIT(reg, bit) (*(volatile uint32*)(reg) &= ~BIT(bit))
#define REG_SET_MASK(reg, mask) (*(volatile uint32*)(reg) |= (uint32)(mask))
#define REG_CLEAR_MASK(reg, mask) (*(volatile uint32*)(reg) &= (uint32)~(mask))
#define REG_GET(reg) *(volatile uint32*)(reg)
#define __set_bits(addr, mask) *(volatile uint32*)(addr) |= (uint32)(mask)
#define __clear_bits(addr, mask) (*(volatile uint32*)(addr) &= (uint32)~(mask))
#define __get_bits(addr, mask) (*(volatile uint32*)(addr) & (uint32)(mask))
#define __read(reg) *(volatile uint32*)(reg)
#define __write(reg, value) *(volatile uint32*)(reg) = (value)
#define IS_POWER_OF_TWO(v) (v && !(v & (v - 1)))
#ifdef __cplusplus
extern "C"{
#endif
void _fail(const char*, int, const char*);
#ifdef __cplusplus
} // extern "C"
#endif
/* Assert for sanity checks, undefine MAPLE_DEBUG to compile
* out these checks */
#if MAPLE_DEBUG
#define ASSERT(exp) \
if (exp) \
{} \
else \
_fail(__FILE__, __LINE__, #exp)
#else
#define ASSERT(exp) (void)((0))
#endif
#endif
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