68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2010 Thomas Otto <tommi@viadmin.org>
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* Copyright (C) 2010 Mark Butler <mbutler@physics.otago.ac.nz>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libopencm3/stm32/flash.h>
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void flash_set_ws(uint32_t ws)
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{
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uint32_t reg32;
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reg32 = FLASH_ACR;
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reg32 &= ~((1 << 0) | (1 << 1) | (1 << 2));
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reg32 |= ws;
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FLASH_ACR = reg32;
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}
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void flash_unlock(void)
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{
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/* Clear the unlock sequence state. */
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FLASH_CR |= FLASH_CR_LOCK;
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/* Authorize the FPEC access. */
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FLASH_KEYR = FLASH_KEYR_KEY1;
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FLASH_KEYR = FLASH_KEYR_KEY2;
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}
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void flash_lock(void)
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{
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FLASH_CR |= FLASH_CR_LOCK;
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}
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void flash_clear_pgperr_flag(void)
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{
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FLASH_SR |= FLASH_SR_PGPERR;
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}
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void flash_clear_eop_flag(void)
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{
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FLASH_SR |= FLASH_SR_EOP;
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}
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void flash_clear_bsy_flag(void)
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{
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FLASH_SR &= ~FLASH_SR_BSY;
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}
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void flash_wait_for_last_operation(void)
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{
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while ((FLASH_SR & FLASH_SR_BSY) == FLASH_SR_BSY);
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}
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