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118 lines
2.7 KiB
118 lines
2.7 KiB
2 months ago
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/** @defgroup flash_file FLASH peripheral API
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*
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* @ingroup peripheral_apis
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*
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* @brief <b>libopencm3 STM32F3xx FLASH</b>
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*
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* @version 1.0.0
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*
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* @author @htmlonly © @endhtmlonly 2010
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* Thomas Otto <tommi@viadmin.org>
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* @author @htmlonly © @endhtmlonly 2010
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* Mark Butler <mbutler@physics.otago.ac.nz>
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*
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* @date 14 January 2014
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*
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* This library supports the FLASH memory controller in the STM32F3
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* series of ARM Cortex Microcontrollers by ST Microelectronics.
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*
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* For the STM32F3xx, accessing FLASH memory is described in
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* section 3 of the STM32F3xx Reference Manual.
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*
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* LGPL License Terms @ref lgpl_license
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*/
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/*
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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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/**@{*/
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#include <libopencm3/stm32/flash.h>
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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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void flash_clear_pgerr_flag(void)
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{
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FLASH_SR |= FLASH_SR_PGERR;
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}
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void flash_clear_wrprterr_flag(void)
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{
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FLASH_SR |= FLASH_SR_WRPRTERR;
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}
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/*---------------------------------------------------------------------------*/
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/** @brief Clear All Status Flags
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Clears program error, end of operation, busy flags.
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*/
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void flash_clear_status_flags(void)
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{
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flash_clear_pgerr_flag();
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flash_clear_wrprterr_flag();
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flash_clear_eop_flag();
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}
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void flash_program_half_word(uint32_t address, uint16_t data)
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{
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flash_wait_for_last_operation();
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FLASH_CR |= FLASH_CR_PG;
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MMIO16(address) = data;
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flash_wait_for_last_operation();
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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_for_last_operation();
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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_for_last_operation();
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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_for_last_operation();
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FLASH_CR |= FLASH_CR_MER;
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FLASH_CR |= FLASH_CR_STRT;
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flash_wait_for_last_operation();
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FLASH_CR &= ~FLASH_CR_MER;
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}
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/**@}*/
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