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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 libmaple/include/libmaple/flash.h
* @brief Flash support.
*/
#ifndef _LIBMAPLE_FLASH_H_
#define _LIBMAPLE_FLASH_H_
#ifdef __cplusplus
extern "C"{
#endif
#include <libmaple/libmaple_types.h>
#define FLASH_WAIT_STATE_0 0x0
#define FLASH_WAIT_STATE_1 0x1
#define FLASH_WAIT_STATE_2 0x2
#define FLASH_WAIT_STATE_3 0x3
#define FLASH_WAIT_STATE_4 0x4
#define FLASH_WAIT_STATE_5 0x5
#define FLASH_WAIT_STATE_6 0x6
#define FLASH_WAIT_STATE_7 0x7
/* The series header must define:
*
* - FLASH_SAFE_WAIT_STATES, the smallest number of wait states that
* it is safe to use when SYSCLK is at its fastest documented rate
* and the MCU is powered at 3.3V (i.e. this doesn't consider
* overclocking or low voltage operation).
*
* - The following bit flags, for flash_enable_features():
*
* -- FLASH_PREFETCH: prefetcher
* -- FLASH_ICACHE: instruction cache
* -- FLASH_DCACHE: data cache
*
* See that function's Doxygen for more restrictions.
*/
#include <series/flash.h>
#ifdef __DOXYGEN__
/** Flash register map base pointer. */
#define FLASH_BASE
#endif
/*
* Flash routines
*/
void flash_set_latency(uint32 wait_states);
/**
* @brief Enable Flash memory features
*
* If the target MCU doesn't provide a feature (e.g. instruction and
* data caches on the STM32F1), the flag will be ignored. This allows
* using these flags unconditionally, with the desired effect taking
* place on targets that support them.
*
* @param feature_flags Bitwise OR of the following:
* FLASH_PREFETCH (turns on prefetcher),
* FLASH_ICACHE (turns on instruction cache),
* FLASH_DCACHE (turns on data cache).
*/
static inline void flash_enable_features(uint32 feature_flags) {
FLASH_BASE->ACR |= feature_flags;
}
/**
* @brief Deprecated. Use flash_enable_features(FLASH_PREFETCH) instead.
*/
static inline void flash_enable_prefetch(void) {
flash_enable_features(FLASH_PREFETCH);
}
#ifdef __cplusplus
}
#endif
#endif
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