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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.
* ****************************************************************************/
#include "libmaple.h"
#include "flash.h"
#define ACR_PRFTBE ((uint32)0xFFFFFFEF)
#define ACR_PRFTBE_ENABLE ((uint32)0x00000010) /* FLASH Prefetch Buffer Enable */
#define ACR_PRFTBE_DISABLE ((uint32)0x00000000) /* FLASH Prefetch Buffer Disable */
#define ACR_LATENCY ((uint32)0x00000038)
#define ACR_LATENCY_0 ((uint32)0x00000000) /* FLASH Zero Latency cycle */
#define ACR_LATENCY_1 ((uint32)0x00000001) /* FLASH One Latency cycle */
#define ACR_LATENCY_2 ((uint32)0x00000002) /* FLASH Two Latency cycles */
void flash_enable_prefetch(void) {
uint32 acr = __read(FLASH_ACR);
acr &= ACR_PRFTBE;
acr |= ACR_PRFTBE_ENABLE;
__write(FLASH_ACR, acr);
}
void flash_set_latency(void) {
uint32 acr = __read(FLASH_ACR);
acr &= ACR_LATENCY;
acr |= ACR_LATENCY_2;
__write(FLASH_ACR, acr);
}
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