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