bme.h

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/*
 * Copyright (C) 2017 Eistec AB
 *
 * This file is subject to the terms and conditions of the GNU Lesser General
 * Public License v2.1. See the file LICENSE in the top level directory for more
 * details.
 */
 
#pragma once
 
#include <stdint.h>
 
#ifdef __cplusplus
extern "C"
{
#endif
 
#define BITBAND_FUNCTIONS_PROVIDED 1
 
#define BME_AND_MASK        (1 << 26) 
#define BME_OR_MASK         (1 << 27) 
#define BME_XOR_MASK        (3 << 26) 
#define BME_LAC1_MASK(BIT)  ((1 << 27) | ((BIT) << 21)) 
#define BME_LAS1_MASK(BIT)  ((3 << 26) | ((BIT) << 21)) 
#define BME_BF_MASK(bit, width) ((1 << 28) | ((bit) << 23) | (((width) - 1 ) << 19))
 
static inline volatile void *bme_bf_addr(volatile void *ptr, uintptr_t bit, uintptr_t width)
{
    return (volatile void *)(((uintptr_t)ptr) | BME_BF_MASK(bit, width));
}
 
static inline volatile uint32_t *bme_bitfield32(volatile uint32_t *ptr, uint8_t bit, uint8_t width)
{
    return (volatile uint32_t *)(bme_bf_addr(ptr, bit, width));
}
 
static inline volatile uint16_t *bme_bitfield16(volatile uint16_t *ptr, uint8_t bit, uint8_t width)
{
    return (volatile uint16_t *)(bme_bf_addr(ptr, bit, width));
}
 
static inline volatile uint8_t *bme_bitfield8(volatile uint8_t *ptr, uint8_t bit, uint8_t width)
{
    return (volatile uint8_t *)(bme_bf_addr(ptr, bit, width));
}
 
/* For compatibility with the M3/M4 bitbanding macros: */
 
static inline void bit_set32(volatile uint32_t *ptr, uint8_t bit)
{
    *((volatile uint32_t *)(((uintptr_t)ptr) | BME_OR_MASK)) = (uint32_t)((1ul << bit));
}
 
static inline void bit_set16(volatile uint16_t *ptr, uint8_t bit)
{
    *((volatile uint16_t *)(((uintptr_t)ptr) | BME_OR_MASK)) = (uint16_t)((1ul << bit));
}
 
static inline void bit_set8(volatile uint8_t *ptr, uint8_t bit)
{
    *((volatile uint8_t *)(((uintptr_t)ptr) | BME_OR_MASK)) = (uint8_t)((1ul << bit));
}
 
static inline void bit_clear32(volatile uint32_t *ptr, uint8_t bit)
{
    *((volatile uint32_t *)(((uintptr_t)ptr) | BME_AND_MASK)) = (uint32_t)(~(1ul << bit));
}
 
static inline void bit_clear16(volatile uint16_t *ptr, uint8_t bit)
{
    *((volatile uint16_t *)(((uintptr_t)ptr) | BME_AND_MASK)) = (uint16_t)(~(1ul << bit));
}
 
static inline void bit_clear8(volatile uint8_t *ptr, uint8_t bit)
{
    *((volatile uint8_t *)(((uintptr_t)ptr) | BME_AND_MASK)) = (uint8_t)(~(1ul << bit));
}
 
#ifdef __cplusplus
}
#endif