mirror of https://github.com/ARMmbed/mbed-os.git
257 lines
6.8 KiB
C
257 lines
6.8 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2018 GigaDevice Semiconductor Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "flash_api.h"
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#include "mbed_critical.h"
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#if DEVICE_FLASH
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#include "cmsis.h"
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#define FLASH_SIZE (0x00200000U)
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#define FLASH_START_ADDR (0x08000000U)
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#define FLASH_END_ADDR (0x081FFFFFU)
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#define FLASH_BANK0_START_ADDR (0x08000000U)
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#define FLASH_BANK1_START_ADDR (0x08100000U)
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#define SIZE_16KB (0x00004000U)
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#define SIZE_64KB (0x00010000U)
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#define SIZE_128KB (0x00020000U)
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#define WRONG_SECTOR_NUM (0xFFFFFFFFU)
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#define WORD_SIZE (4U)
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typedef struct sector_information {
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uint32_t sector_num;
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uint32_t sector_size;
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} sector_t;
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/* get the sector number and size of the given address
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*
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* @param address The sector starting address
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* @return The struct of a sector
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*/
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static sector_t flash_sector_info_get(uint32_t addr)
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{
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sector_t sector_info;
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uint32_t temp = 0x00000000;
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if ((FLASH_BANK0_START_ADDR <= addr) && (FLASH_BANK1_START_ADDR > addr)) {
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temp = (addr - FLASH_BANK0_START_ADDR) / SIZE_16KB;
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if (4U > temp) {
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sector_info.sector_num = temp;
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sector_info.sector_size = SIZE_16KB;
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} else if (8U > temp) {
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sector_info.sector_num = 4U;
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sector_info.sector_size = SIZE_64KB;
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} else {
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temp = (addr - FLASH_BANK0_START_ADDR) / SIZE_128KB;
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sector_info.sector_num = temp + 4U;
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sector_info.sector_size = SIZE_128KB;
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}
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} else if ((FLASH_BANK1_START_ADDR <= addr) && (FLASH_END_ADDR >= addr)) {
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temp = (addr - FLASH_BANK1_START_ADDR) / SIZE_16KB;
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if (4U > temp) {
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sector_info.sector_num = temp + 12U;
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sector_info.sector_size = SIZE_16KB;
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} else if (8U > temp) {
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sector_info.sector_num = 16U;
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sector_info.sector_size = SIZE_64KB;
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} else {
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temp = (addr - FLASH_BANK1_START_ADDR) / SIZE_128KB;
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sector_info.sector_num = temp + 16U;
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sector_info.sector_size = SIZE_128KB;
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}
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} else {
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sector_info.sector_num = WRONG_SECTOR_NUM;
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sector_info.sector_size = MBED_FLASH_INVALID_SIZE;
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}
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return sector_info;
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}
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/* unlock the main FLASH operation
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*
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* @return 0 for success, -1 for error
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*/
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static int32_t flash_unlock(void)
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{
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fmc_unlock();
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if (RESET != (FMC_CTL & FMC_CTL_LK)) {
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return -1;
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}
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return 0;
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}
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/* lock the main FLASH operation
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*
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* @return 0 for success, -1 for error
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*/
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static int32_t flash_lock(void)
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{
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fmc_lock();
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if (RESET == (FMC_CTL & FMC_CTL_LK)) {
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return -1;
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}
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return 0;
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}
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/** Initialize the flash peripheral and the flash_t object
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*
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* @param obj The flash object
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* @return 0 for success, -1 for error
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*/
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int32_t flash_init(flash_t *obj)
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{
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return 0;
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}
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/** Uninitialize the flash peripheral and the flash_t object
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*
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* @param obj The flash object
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* @return 0 for success, -1 for error
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*/
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int32_t flash_free(flash_t *obj)
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{
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return 0;
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}
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/** Erase one sector starting at defined address
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*
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* The address should be at sector boundary. This function does not do any check for address alignments
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* @param obj The flash object
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* @param address The sector starting address
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* @return 0 for success, -1 for error
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*/
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int32_t flash_erase_sector(flash_t *obj, uint32_t address)
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{
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uint32_t number;
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sector_t sector_info;
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int32_t flash_state = 0;
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flash_unlock();
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/* clear FLASH flag */
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fmc_flag_clear(FMC_FLAG_END | FMC_FLAG_OPERR | FMC_FLAG_WPERR | FMC_FLAG_PGMERR | FMC_FLAG_PGSERR);
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/* make sure the address is a right page address */
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sector_info = flash_sector_info_get(address);
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if (11U >= sector_info.sector_num) {
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number = sector_info.sector_num;
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} else if (23U >= sector_info.sector_num) {
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number = sector_info.sector_num + 4U;
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} else {
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number = sector_info.sector_num - 12U;
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}
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if (FMC_READY != fmc_sector_erase(CTL_SN(number))) {
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flash_state = -1;
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}
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flash_lock();
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return flash_state;
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}
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/** Program pages starting at defined address
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*
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* The pages should not cross multiple sectors.
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* This function does not do any check for address alignments or if size is aligned to a page size.
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* @param obj The flash object
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* @param address The sector starting address
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* @param data The data buffer to be programmed
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* @param size The number of bytes to program
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* @return 0 for success, -1 for error
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*/
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int32_t flash_program_page(flash_t *obj, uint32_t address, const uint8_t *data, uint32_t size)
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{
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uint32_t *p_data;
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p_data = (uint32_t *)data;
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uint32_t num = 0;
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int32_t flash_state = 0;
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flash_unlock();
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/* clear FLASH flag */
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fmc_flag_clear(FMC_FLAG_END | FMC_FLAG_OPERR | FMC_FLAG_WPERR | FMC_FLAG_PGMERR | FMC_FLAG_PGSERR);
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if (size % 4) {
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num = size / 4 + 1;
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} else {
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num = size / 4;
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}
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for (uint32_t i = 0; i < num; i++) {
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if (FMC_READY != fmc_word_program(address, *(p_data + i))) {
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flash_state = -1;
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break;
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}
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address += 4;
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}
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flash_lock();
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return flash_state;
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}
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/** Get sector size
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*
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* @param obj The flash object
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* @param address The sector starting address
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* @return The size of a sector
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*/
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uint32_t flash_get_sector_size(const flash_t *obj, uint32_t address)
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{
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sector_t sector_info;
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sector_info = flash_sector_info_get(address);
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return (sector_info.sector_size);
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}
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/** Get page size
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*
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* The page size defines the writable page size
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* @param obj The flash object
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* @return The size of a page
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*/
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uint32_t flash_get_page_size(const flash_t *obj)
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{
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return WORD_SIZE;
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}
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/** Get start address for the flash region
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*
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* @param obj The flash object
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* @return The start address for the flash region
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*/
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uint32_t flash_get_start_address(const flash_t *obj)
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{
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return FLASH_START_ADDR;
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}
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/** Get the flash region size
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*
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* @param obj The flash object
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* @return The flash region size
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*/
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uint32_t flash_get_size(const flash_t *obj)
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{
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return FLASH_SIZE;
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}
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/** Get the flash erase value
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*
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* @param obj The flash object
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* @return The flash erase value
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*/
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uint8_t flash_get_erase_value(const flash_t *obj)
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{
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return 0xFF;
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}
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#endif /* DEVICE_FLASH */
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