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/* *****************************************************************************
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Created: 12/18/09 02:39:27
* Copyright (c) 2009 Perry L. Hung. All rights reserved.
*
* ****************************************************************************/
/**
* @file util.h
*
* @brief Various macros and utility procedures.
*/
/* Generally "useful" utility procedures */
#ifndef _UTIL_H_
#define _UTIL_H_
#include <inttypes.h>
#define MAPLE_DEBUG 1
#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_t)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_t*)(reg) = (val))
#define REG_SET_BIT(reg, bit) (*(volatile uint32_t*)(reg) |= BIT(bit))
#define REG_CLEAR_BIT(reg, bit) (*(volatile uint32_t*)(reg) &= ~BIT(bit))
#define REG_SET_MASK(reg, mask) (*(volatile uint32_t*)(reg) |= (uint32_t)(mask))
#define REG_CLEAR_MASK(reg, mask) (*(volatile uint32_t*)(reg) &= (uint32_t)~(mask))
#define REG_GET(reg) *(volatile uint32_t*)(reg)
#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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