flash.c

/******************************************************************************
 * 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,
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 * 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,
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 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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 * SOFTWARE.
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/**
 * @file libmaple/flash.c
 * @brief Flash management functions
 */

#include <libmaple/libmaple_types.h>
#include <libmaple/flash.h>

/**
 * @brief Set flash wait states
 *
 * Note that not all wait states are available on every MCU. See the
 * Flash programming manual for your MCU for restrictions on the
 * allowed value of wait_states for a given system clock (SYSCLK)
 * frequency.
 *
 * @param wait_states number of wait states (one of
 *                    FLASH_WAIT_STATE_0, FLASH_WAIT_STATE_1,
 *                    ..., FLASH_WAIT_STATE_7).
 */
void flash_set_latency(uint32 wait_states) {
    uint32 val = FLASH_BASE->ACR;

    val &= ~FLASH_ACR_LATENCY;
    val |= wait_states;

    FLASH_BASE->ACR = val;
}