Arti Zirk
054740c5de
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: "???"
304 lines
8.4 KiB
C
304 lines
8.4 KiB
C
/** @defgroup flash_file FLASH peripheral API
|
|
*
|
|
* @ingroup peripheral_apis
|
|
*
|
|
* @brief <b>libopencm3 STM32F1xx FLASH Memory</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
|
|
*
|
|
* For the STM32F1xx, accessing FLASH memory is described briefly in
|
|
* section 3.3.3 of the STM32F10x Reference Manual.
|
|
* For detailed programming information see:
|
|
* PM0075 programming manual: STM32F10xxx Flash programming
|
|
* August 2010, Doc ID 17863 Rev 1
|
|
* https://github.com/libopencm3/libopencm3-archive/blob/master/st_micro/CD00283419.pdf
|
|
*
|
|
* FLASH memory may be used for data storage as well as code, and may be
|
|
* programmatically modified. Note that for firmware upload the STM32F1xx
|
|
* provides a built-in bootloader in system memory that can be entered from a
|
|
* running program.
|
|
*
|
|
* FLASH must first be unlocked before programming. In this module a write to
|
|
* FLASH is a blocking operation until the end-of-operation flag is asserted.
|
|
*
|
|
* @note: don't forget to lock it again when all operations are complete.
|
|
*
|
|
* For the large memory XL series, with two banks of FLASH, the upper bank is
|
|
* accessed with a second set of registers. In principle both banks can be
|
|
* written simultaneously, or one read while the other is written. This module
|
|
* does not support the simultaneous write feature.
|
|
*
|
|
* 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/desig.h>
|
|
#include <libopencm3/stm32/flash.h>
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Enable the FLASH Half Cycle Mode
|
|
|
|
This mode is used for power saving during read access. It is disabled by default
|
|
on reset.
|
|
|
|
Note carefully the clock restrictions under which the half cycle mode may be
|
|
enabled or disabled. This mode may only be used while the clock is running at
|
|
8MHz. See the reference manual for details.
|
|
*/
|
|
|
|
void flash_halfcycle_enable(void)
|
|
{
|
|
FLASH_ACR |= FLASH_ACR_HLFCYA;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Disable the FLASH Half Cycle Mode
|
|
|
|
*/
|
|
|
|
void flash_halfcycle_disable(void)
|
|
{
|
|
FLASH_ACR &= ~FLASH_ACR_HLFCYA;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Unlock the Flash Program and Erase Controller, upper Bank
|
|
|
|
This enables write access to the upper bank of the Flash memory in XL devices.
|
|
It is locked by default on reset.
|
|
*/
|
|
|
|
void flash_unlock_upper(void)
|
|
{
|
|
if (desig_get_flash_size() > 512) {
|
|
|
|
/* Clear the unlock state. */
|
|
FLASH_CR2 |= FLASH_CR_LOCK;
|
|
|
|
/* Authorize the FPEC access. */
|
|
FLASH_KEYR2 = FLASH_KEYR_KEY1;
|
|
FLASH_KEYR2 = FLASH_KEYR_KEY2;
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Lock the Flash Program and Erase Controller, upper Bank
|
|
|
|
Used to prevent spurious writes to FLASH.
|
|
*/
|
|
|
|
void flash_lock_upper(void)
|
|
{
|
|
FLASH_CR2 |= FLASH_CR_LOCK;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Clear the Programming Error Status Flag, upper Bank
|
|
|
|
*/
|
|
|
|
void flash_clear_pgerr_flag_upper(void)
|
|
{
|
|
if (desig_get_flash_size() > 512) {
|
|
FLASH_SR2 |= FLASH_SR_PGERR;
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Clear the End of Operation Status Flag, upper Bank
|
|
|
|
*/
|
|
|
|
void flash_clear_eop_flag_upper(void)
|
|
{
|
|
if (desig_get_flash_size() > 512) {
|
|
FLASH_SR2 |= FLASH_SR_EOP;
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Clear the Write Protect Error Status Flag, upper Bank
|
|
|
|
*/
|
|
|
|
void flash_clear_wrprterr_flag_upper(void)
|
|
{
|
|
if (desig_get_flash_size() > 512) {
|
|
FLASH_SR2 |= FLASH_SR_WRPRTERR;
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Clear All Status Flags
|
|
|
|
Program error, end of operation, write protect error, busy. Both banks cleared.
|
|
*/
|
|
|
|
void flash_clear_status_flags(void)
|
|
{
|
|
flash_clear_pgerr_flag();
|
|
flash_clear_eop_flag();
|
|
flash_clear_wrprterr_flag();
|
|
if (desig_get_flash_size() > 512) {
|
|
flash_clear_pgerr_flag_upper();
|
|
flash_clear_eop_flag_upper();
|
|
flash_clear_wrprterr_flag_upper();
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Read All Status Flags
|
|
|
|
The programming error, end of operation, write protect error and busy flags
|
|
are returned in the order of appearance in the status register.
|
|
|
|
Flags for the upper bank, where appropriate, are combined with those for
|
|
the lower bank using bitwise OR, without distinction.
|
|
|
|
@returns uint32_t. bit 0: busy, bit 2: programming error, bit 4: write protect
|
|
error, bit 5: end of operation.
|
|
*/
|
|
|
|
uint32_t flash_get_status_flags(void)
|
|
{
|
|
uint32_t flags = (FLASH_SR & (FLASH_SR_PGERR |
|
|
FLASH_SR_EOP |
|
|
FLASH_SR_WRPRTERR |
|
|
FLASH_SR_BSY));
|
|
if (desig_get_flash_size() > 512) {
|
|
flags |= (FLASH_SR2 & (FLASH_SR_PGERR |
|
|
FLASH_SR_EOP |
|
|
FLASH_SR_WRPRTERR |
|
|
FLASH_SR_BSY));
|
|
}
|
|
|
|
return flags;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @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.
|
|
|
|
Status bit polling is used to detect end of operation.
|
|
|
|
@param[in] address Full address of flash half word to be programmed.
|
|
@param[in] data half word to write
|
|
*/
|
|
|
|
void flash_program_half_word(uint32_t address, uint16_t data)
|
|
{
|
|
flash_wait_for_last_operation();
|
|
|
|
if ((desig_get_flash_size() > 512) && (address >= FLASH_BASE+0x00080000)) {
|
|
FLASH_CR2 |= FLASH_CR_PG;
|
|
} else {
|
|
FLASH_CR |= FLASH_CR_PG;
|
|
}
|
|
|
|
MMIO16(address) = data;
|
|
|
|
flash_wait_for_last_operation();
|
|
|
|
if ((desig_get_flash_size() > 512) && (address >= FLASH_BASE+0x00080000)) {
|
|
FLASH_CR2 &= ~FLASH_CR_PG;
|
|
} else {
|
|
FLASH_CR &= ~FLASH_CR_PG;
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Erase a Page of FLASH
|
|
|
|
This performs all operations necessary to erase a page in FLASH memory.
|
|
The page should be checked to ensure that it was properly erased. A page must
|
|
first be fully erased before attempting to program it.
|
|
|
|
Note that the page sizes differ between devices. See the reference manual or
|
|
the FLASH programming manual for details.
|
|
|
|
@param[in] page_address Full address of flash page to be erased.
|
|
*/
|
|
|
|
void flash_erase_page(uint32_t page_address)
|
|
{
|
|
flash_wait_for_last_operation();
|
|
|
|
if ((desig_get_flash_size() > 512)
|
|
&& (page_address >= FLASH_BASE+0x00080000)) {
|
|
FLASH_CR2 |= FLASH_CR_PER;
|
|
FLASH_AR2 = page_address;
|
|
FLASH_CR2 |= FLASH_CR_STRT;
|
|
} else {
|
|
FLASH_CR |= FLASH_CR_PER;
|
|
FLASH_AR = page_address;
|
|
FLASH_CR |= FLASH_CR_STRT;
|
|
}
|
|
|
|
flash_wait_for_last_operation();
|
|
|
|
if ((desig_get_flash_size() > 512)
|
|
&& (page_address >= FLASH_BASE+0x00080000)) {
|
|
FLASH_CR2 &= ~FLASH_CR_PER;
|
|
} else {
|
|
FLASH_CR &= ~FLASH_CR_PER;
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Erase All FLASH
|
|
|
|
This performs all operations necessary to erase all user pages in the FLASH
|
|
memory. The information block is unaffected.
|
|
*/
|
|
|
|
void flash_erase_all_pages(void)
|
|
{
|
|
flash_wait_for_last_operation();
|
|
|
|
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. */
|
|
|
|
/* Repeat for bank 2 */
|
|
FLASH_CR2 |= FLASH_CR_MER;
|
|
FLASH_CR2 |= FLASH_CR_STRT;
|
|
|
|
flash_wait_for_last_operation();
|
|
FLASH_CR2 &= ~FLASH_CR_MER;
|
|
}
|
|
|
|
/**@}*/
|
|
|