94 lines
2.0 KiB
C
94 lines
2.0 KiB
C
/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2013 Frantisek Burian <BuFran@seznam.cz>
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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_prefetch_buffer_enable(void)
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{
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FLASH_ACR |= FLASH_ACR_PRFTBE;
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}
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void flash_prefetch_buffer_disable(void)
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{
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FLASH_ACR &= ~FLASH_ACR_PRFTBE;
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}
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void flash_set_ws(uint32_t ws)
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{
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FLASH_ACR = (FLASH_ACR & ~FLASH_ACR_LATENCY) | ws;
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}
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void flash_wait_busy(void)
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{
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while ((FLASH_SR & FLASH_SR_BSY) != 0);
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}
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void flash_program_u32(uint32_t address, uint32_t data)
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{
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flash_wait_busy();
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FLASH_CR |= FLASH_CR_PG;
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MMIO16(address) = (uint16_t)data;
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flash_wait_busy();
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MMIO16(address + 2) = data >> 16;
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flash_wait_busy();
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FLASH_CR &= ~FLASH_CR_PG;
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}
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void flash_program_u16(uint32_t address, uint16_t data)
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{
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flash_wait_busy();
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FLASH_CR |= FLASH_CR_PG;
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MMIO16(address) = data;
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flash_wait_busy();
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FLASH_CR &= ~FLASH_CR_PG;
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}
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void flash_erase_page(uint32_t page_address)
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{
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flash_wait_busy();
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FLASH_CR |= FLASH_CR_PER;
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FLASH_AR = page_address;
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FLASH_CR |= FLASH_CR_STRT;
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flash_wait_busy();
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FLASH_CR &= ~FLASH_CR_PER;
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}
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void flash_erase_all_pages(void)
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{
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flash_wait_busy();
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FLASH_CR |= FLASH_CR_MER; /* Enable mass erase. */
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FLASH_CR |= FLASH_CR_STRT; /* Trigger the erase. */
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flash_wait_busy();
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FLASH_CR &= ~FLASH_CR_MER; /* Disable mass erase. */
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}
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