lora-car/libopencm3/lib/stm32/common/flash_common_all.c

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/** @addtogroup flash_file FLASH peripheral API
* @ingroup peripheral_apis
*/
/*
* This file is part of the libopencm3 project.
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/**@{*/
#include <libopencm3/stm32/flash.h>
void flash_prefetch_enable(void)
{
FLASH_ACR |= FLASH_ACR_PRFTEN;
}
void flash_prefetch_disable(void)
{
FLASH_ACR &= ~FLASH_ACR_PRFTEN;
}
void flash_set_ws(uint32_t ws)
{
uint32_t reg32;
reg32 = FLASH_ACR;
reg32 &= ~(FLASH_ACR_LATENCY_MASK << FLASH_ACR_LATENCY_SHIFT);
reg32 |= (ws << FLASH_ACR_LATENCY_SHIFT);
FLASH_ACR = reg32;
}
void flash_unlock_option_bytes(void)
{
FLASH_OPTKEYR = FLASH_OPTKEYR_KEY1;
FLASH_OPTKEYR = FLASH_OPTKEYR_KEY2;
}
/**@}*/