Arti Zirk
2de3a91b0a
subrepo: subdir: "libopencm3" merged: "88e91c9a7cce" upstream: origin: "https://github.com/libopencm3/libopencm3.git" branch: "master" commit: "88e91c9a7cce" git-subrepo: version: "0.4.3" origin: "???" commit: "???"
292 lines
8.1 KiB
C
292 lines
8.1 KiB
C
/** @addtogroup flash_file
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* 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>
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Set the Program Parallelism Size
|
|
|
|
Set the programming word width. Note carefully the power supply voltage
|
|
restrictions under which the different word sizes may be used. See the
|
|
programming manual for more information.
|
|
@param[in] psize The programming word width one of: @ref flash_cr_program_width
|
|
*/
|
|
|
|
static inline void flash_set_program_size(uint32_t psize)
|
|
{
|
|
FLASH_CR &= ~(FLASH_CR_PROGRAM_MASK << FLASH_CR_PROGRAM_SHIFT);
|
|
FLASH_CR |= psize << FLASH_CR_PROGRAM_SHIFT;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Clear the Programming Alignment Error Flag
|
|
|
|
*/
|
|
|
|
void flash_clear_pgaerr_flag(void)
|
|
{
|
|
FLASH_SR |= FLASH_SR_PGAERR;
|
|
}
|
|
|
|
/** Clear programming parallelism error flag
|
|
*/
|
|
void flash_clear_pgperr_flag(void)
|
|
{
|
|
FLASH_SR |= FLASH_SR_PGPERR;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Clear the Write Protect Error Flag
|
|
|
|
*/
|
|
|
|
void flash_clear_wrperr_flag(void)
|
|
{
|
|
FLASH_SR |= FLASH_SR_WRPERR;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Lock the Option Byte Access
|
|
|
|
This disables write access to the option bytes. It is locked by default on
|
|
reset.
|
|
*/
|
|
|
|
void flash_lock_option_bytes(void)
|
|
{
|
|
FLASH_OPTCR |= FLASH_OPTCR_OPTLOCK;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Program a 64 bit Word to FLASH
|
|
|
|
This performs all operations necessary to program a 64 bit word to FLASH memory.
|
|
The program error flag should be checked separately for the event that memory
|
|
was not properly erased.
|
|
|
|
@param[in] address Starting address in Flash.
|
|
@param[in] data Double word to write
|
|
*/
|
|
|
|
void flash_program_double_word(uint32_t address, uint64_t data)
|
|
{
|
|
/* Ensure that all flash operations are complete. */
|
|
flash_wait_for_last_operation();
|
|
flash_set_program_size(FLASH_CR_PROGRAM_X64);
|
|
|
|
/* Enable writes to flash. */
|
|
FLASH_CR |= FLASH_CR_PG;
|
|
|
|
/* Program the double_word. */
|
|
MMIO64(address) = data;
|
|
|
|
/* Wait for the write to complete. */
|
|
flash_wait_for_last_operation();
|
|
|
|
/* Disable writes to flash. */
|
|
FLASH_CR &= ~FLASH_CR_PG;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Program a 32 bit Word to FLASH
|
|
|
|
This performs all operations necessary to program a 32 bit word to FLASH memory.
|
|
The program error flag should be checked separately for the event that memory
|
|
was not properly erased.
|
|
|
|
@param[in] address Starting address in Flash.
|
|
@param[in] data word to write
|
|
*/
|
|
|
|
void flash_program_word(uint32_t address, uint32_t data)
|
|
{
|
|
/* Ensure that all flash operations are complete. */
|
|
flash_wait_for_last_operation();
|
|
flash_set_program_size(FLASH_CR_PROGRAM_X32);
|
|
|
|
/* Enable writes to flash. */
|
|
FLASH_CR |= FLASH_CR_PG;
|
|
|
|
/* Program the word. */
|
|
MMIO32(address) = data;
|
|
|
|
/* Wait for the write to complete. */
|
|
flash_wait_for_last_operation();
|
|
|
|
/* Disable writes to flash. */
|
|
FLASH_CR &= ~FLASH_CR_PG;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Program a Half Word to FLASH
|
|
|
|
This performs all operations necessary to program a 16 bit word to FLASH memory.
|
|
The program error flag should be checked separately for the event that memory
|
|
was not properly erased.
|
|
|
|
@param[in] address Starting address in Flash.
|
|
@param[in] data half word to write
|
|
*/
|
|
|
|
void flash_program_half_word(uint32_t address, uint16_t data)
|
|
{
|
|
flash_wait_for_last_operation();
|
|
flash_set_program_size(FLASH_CR_PROGRAM_X16);
|
|
|
|
FLASH_CR |= FLASH_CR_PG;
|
|
|
|
MMIO16(address) = data;
|
|
|
|
flash_wait_for_last_operation();
|
|
|
|
FLASH_CR &= ~FLASH_CR_PG; /* Disable the PG bit. */
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Program an 8 bit Byte to FLASH
|
|
|
|
This performs all operations necessary to program an 8 bit byte to FLASH memory.
|
|
The program error flag should be checked separately for the event that memory
|
|
was not properly erased.
|
|
|
|
@param[in] address Starting address in Flash.
|
|
@param[in] data byte to write
|
|
*/
|
|
|
|
void flash_program_byte(uint32_t address, uint8_t data)
|
|
{
|
|
flash_wait_for_last_operation();
|
|
flash_set_program_size(FLASH_CR_PROGRAM_X8);
|
|
|
|
FLASH_CR |= FLASH_CR_PG;
|
|
|
|
MMIO8(address) = data;
|
|
|
|
flash_wait_for_last_operation();
|
|
|
|
FLASH_CR &= ~FLASH_CR_PG; /* Disable the PG bit. */
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Program a Data Block to FLASH
|
|
|
|
This programs an arbitrary length data block to FLASH memory.
|
|
The program error flag should be checked separately for the event that memory
|
|
was not properly erased.
|
|
|
|
@param[in] address Starting address in Flash.
|
|
@param[in] data Pointer to start of data block.
|
|
@param[in] len Length of data block.
|
|
*/
|
|
|
|
void flash_program(uint32_t address, const uint8_t *data, uint32_t len)
|
|
{
|
|
/* TODO: Use dword and word size program operations where possible for
|
|
* turbo speed.
|
|
*/
|
|
uint32_t i;
|
|
for (i = 0; i < len; i++) {
|
|
flash_program_byte(address+i, data[i]);
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Erase a Sector of FLASH
|
|
|
|
This performs all operations necessary to erase a sector in FLASH memory.
|
|
The page should be checked to ensure that it was properly erased. A sector must
|
|
first be fully erased before attempting to program it.
|
|
|
|
See the reference manual or the FLASH programming manual for details.
|
|
|
|
@param[in] sector (0 - 11 for some parts, 0-23 on others)
|
|
@param program_size: 0 (8-bit), 1 (16-bit), 2 (32-bit), 3 (64-bit)
|
|
*/
|
|
|
|
void flash_erase_sector(uint8_t sector, uint32_t program_size)
|
|
{
|
|
flash_wait_for_last_operation();
|
|
flash_set_program_size(program_size);
|
|
|
|
/* Sector numbering is not contiguous internally! */
|
|
if (sector >= 12) {
|
|
sector += 4;
|
|
}
|
|
|
|
FLASH_CR &= ~(FLASH_CR_SNB_MASK << FLASH_CR_SNB_SHIFT);
|
|
FLASH_CR |= (sector & FLASH_CR_SNB_MASK) << FLASH_CR_SNB_SHIFT;
|
|
FLASH_CR |= FLASH_CR_SER;
|
|
FLASH_CR |= FLASH_CR_STRT;
|
|
|
|
flash_wait_for_last_operation();
|
|
FLASH_CR &= ~FLASH_CR_SER;
|
|
FLASH_CR &= ~(FLASH_CR_SNB_MASK << FLASH_CR_SNB_SHIFT);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Erase All FLASH
|
|
|
|
This performs all operations necessary to erase all sectors in the FLASH
|
|
memory.
|
|
|
|
@param program_size: 0 (8-bit), 1 (16-bit), 2 (32-bit), 3 (64-bit)
|
|
*/
|
|
|
|
void flash_erase_all_sectors(uint32_t program_size)
|
|
{
|
|
flash_wait_for_last_operation();
|
|
flash_set_program_size(program_size);
|
|
|
|
FLASH_CR |= FLASH_CR_MER; /* Enable mass erase. */
|
|
FLASH_CR |= FLASH_CR_STRT; /* Trigger the erase. */
|
|
|
|
flash_wait_for_last_operation();
|
|
FLASH_CR &= ~FLASH_CR_MER; /* Disable mass erase. */
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Program the Option Bytes
|
|
|
|
This performs all operations necessary to program the option bytes.
|
|
The option bytes do not need to be erased first.
|
|
|
|
@param[in] data value to be programmed.
|
|
*/
|
|
|
|
void flash_program_option_bytes(uint32_t data)
|
|
{
|
|
flash_wait_for_last_operation();
|
|
|
|
if (FLASH_OPTCR & FLASH_OPTCR_OPTLOCK) {
|
|
flash_unlock_option_bytes();
|
|
}
|
|
|
|
FLASH_OPTCR = data & ~0x3;
|
|
FLASH_OPTCR |= FLASH_OPTCR_OPTSTRT; /* Enable option byte prog. */
|
|
flash_wait_for_last_operation();
|
|
}
|
|
/**@}*/
|