Gordon Craig / mbed-dev

Forked.

Fork of mbed-dev by mbed official

targets/TARGET_STM/TARGET_STM32L4/flash_api.c@174:ed647f63e28d, 2017-12-19 (annotated)

Committer:
Dollyparton
Date:
Tue Dec 19 12:50:13 2017 +0000
Revision:
174:ed647f63e28d
Parent:
167:e84263d55307 
Added RAW socket.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 167:e84263d55307 1 /* mbed Microcontroller Library
AnnaBridge 167:e84263d55307 2 * Copyright (c) 2017 ARM Limited
AnnaBridge 167:e84263d55307 3 *
AnnaBridge 167:e84263d55307 4 * Licensed under the Apache License, Version 2.0 (the "License");
AnnaBridge 167:e84263d55307 5 * you may not use this file except in compliance with the License.
AnnaBridge 167:e84263d55307 6 * You may obtain a copy of the License at
AnnaBridge 167:e84263d55307 7 *
AnnaBridge 167:e84263d55307 8 * http://www.apache.org/licenses/LICENSE-2.0
AnnaBridge 167:e84263d55307 9 *
AnnaBridge 167:e84263d55307 10 * Unless required by applicable law or agreed to in writing, software
AnnaBridge 167:e84263d55307 11 * distributed under the License is distributed on an "AS IS" BASIS,
AnnaBridge 167:e84263d55307 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
AnnaBridge 167:e84263d55307 13 * See the License for the specific language governing permissions and
AnnaBridge 167:e84263d55307 14 * limitations under the License.
AnnaBridge 167:e84263d55307 15 */
AnnaBridge 167:e84263d55307 16
AnnaBridge 167:e84263d55307 17 #include "flash_api.h"
AnnaBridge 167:e84263d55307 18 #include "mbed_critical.h"
AnnaBridge 167:e84263d55307 19
AnnaBridge 167:e84263d55307 20 #if DEVICE_FLASH
AnnaBridge 167:e84263d55307 21 #include "mbed_assert.h"
AnnaBridge 167:e84263d55307 22 #include "cmsis.h"
AnnaBridge 167:e84263d55307 23
AnnaBridge 167:e84263d55307 24 /**
AnnaBridge 167:e84263d55307 25 * @brief Gets the page of a given address
AnnaBridge 167:e84263d55307 26 * @param Addr: Address of the FLASH Memory
AnnaBridge 167:e84263d55307 27 * @retval The page of a given address
AnnaBridge 167:e84263d55307 28 */
AnnaBridge 167:e84263d55307 29 static uint32_t GetPage(uint32_t Addr)
AnnaBridge 167:e84263d55307 30 {
AnnaBridge 167:e84263d55307 31 uint32_t page = 0;
AnnaBridge 167:e84263d55307 32
AnnaBridge 167:e84263d55307 33 if (Addr < (FLASH_BASE + FLASH_BANK_SIZE)) {
AnnaBridge 167:e84263d55307 34 /* Bank 1 */
AnnaBridge 167:e84263d55307 35 page = (Addr - FLASH_BASE) / FLASH_PAGE_SIZE;
AnnaBridge 167:e84263d55307 36 } else {
AnnaBridge 167:e84263d55307 37 /* Bank 2 */
AnnaBridge 167:e84263d55307 38 page = (Addr - (FLASH_BASE + FLASH_BANK_SIZE)) / FLASH_PAGE_SIZE;
AnnaBridge 167:e84263d55307 39 }
AnnaBridge 167:e84263d55307 40
AnnaBridge 167:e84263d55307 41 return page;
AnnaBridge 167:e84263d55307 42 }
AnnaBridge 167:e84263d55307 43
AnnaBridge 167:e84263d55307 44 /**
AnnaBridge 167:e84263d55307 45 * @brief Gets the bank of a given address
AnnaBridge 167:e84263d55307 46 * @param Addr: Address of the FLASH Memory
AnnaBridge 167:e84263d55307 47 * @retval The bank of a given address
AnnaBridge 167:e84263d55307 48 */
AnnaBridge 167:e84263d55307 49 static uint32_t GetBank(uint32_t Addr)
AnnaBridge 167:e84263d55307 50 {
AnnaBridge 167:e84263d55307 51 uint32_t bank = 0;
AnnaBridge 167:e84263d55307 52 #if defined(SYSCFG_MEMRMP_FB_MODE)
AnnaBridge 167:e84263d55307 53 if (READ_BIT(SYSCFG->MEMRMP, SYSCFG_MEMRMP_FB_MODE) == 0) {
AnnaBridge 167:e84263d55307 54 /* No Bank swap */
AnnaBridge 167:e84263d55307 55 if (Addr < (FLASH_BASE + FLASH_BANK_SIZE)) {
AnnaBridge 167:e84263d55307 56 bank = FLASH_BANK_1;
AnnaBridge 167:e84263d55307 57 } else {
AnnaBridge 167:e84263d55307 58 bank = FLASH_BANK_2;
AnnaBridge 167:e84263d55307 59 }
AnnaBridge 167:e84263d55307 60 } else {
AnnaBridge 167:e84263d55307 61 /* Bank swap */
AnnaBridge 167:e84263d55307 62 if (Addr < (FLASH_BASE + FLASH_BANK_SIZE)) {
AnnaBridge 167:e84263d55307 63 bank = FLASH_BANK_2;
AnnaBridge 167:e84263d55307 64 } else {
AnnaBridge 167:e84263d55307 65 bank = FLASH_BANK_1;
AnnaBridge 167:e84263d55307 66 }
AnnaBridge 167:e84263d55307 67 }
AnnaBridge 167:e84263d55307 68 #else
AnnaBridge 167:e84263d55307 69 /* Device like L432KC */
AnnaBridge 167:e84263d55307 70 bank = FLASH_BANK_1;
AnnaBridge 167:e84263d55307 71 #endif
AnnaBridge 167:e84263d55307 72
AnnaBridge 167:e84263d55307 73 return bank;
AnnaBridge 167:e84263d55307 74 }
AnnaBridge 167:e84263d55307 75
AnnaBridge 167:e84263d55307 76 /** Initialize the flash peripheral and the flash_t object
AnnaBridge 167:e84263d55307 77 *
AnnaBridge 167:e84263d55307 78 * @param obj The flash object
AnnaBridge 167:e84263d55307 79 * @return 0 for success, -1 for error
AnnaBridge 167:e84263d55307 80 */
AnnaBridge 167:e84263d55307 81 int32_t flash_init(flash_t *obj)
AnnaBridge 167:e84263d55307 82 {
AnnaBridge 167:e84263d55307 83 /* Unlock the Flash to enable the flash control register access *************/
AnnaBridge 167:e84263d55307 84 HAL_FLASH_Unlock();
AnnaBridge 167:e84263d55307 85 return 0;
AnnaBridge 167:e84263d55307 86 }
AnnaBridge 167:e84263d55307 87
AnnaBridge 167:e84263d55307 88 /** Uninitialize the flash peripheral and the flash_t object
AnnaBridge 167:e84263d55307 89 *
AnnaBridge 167:e84263d55307 90 * @param obj The flash object
AnnaBridge 167:e84263d55307 91 * @return 0 for success, -1 for error
AnnaBridge 167:e84263d55307 92 */
AnnaBridge 167:e84263d55307 93 int32_t flash_free(flash_t *obj)
AnnaBridge 167:e84263d55307 94 {
AnnaBridge 167:e84263d55307 95 /* Lock the Flash to disable the flash control register access (recommended
AnnaBridge 167:e84263d55307 96 * to protect the FLASH memory against possible unwanted operation) *********/
AnnaBridge 167:e84263d55307 97 HAL_FLASH_Lock();
AnnaBridge 167:e84263d55307 98 return 0;
AnnaBridge 167:e84263d55307 99 }
AnnaBridge 167:e84263d55307 100
AnnaBridge 167:e84263d55307 101 /** Erase one sector starting at defined address
AnnaBridge 167:e84263d55307 102 *
AnnaBridge 167:e84263d55307 103 * The address should be at sector boundary. This function does not do any check for address alignments
AnnaBridge 167:e84263d55307 104 * @param obj The flash object
AnnaBridge 167:e84263d55307 105 * @param address The sector starting address
AnnaBridge 167:e84263d55307 106 * @return 0 for success, -1 for error
AnnaBridge 167:e84263d55307 107 */
AnnaBridge 167:e84263d55307 108 int32_t flash_erase_sector(flash_t *obj, uint32_t address)
AnnaBridge 167:e84263d55307 109 {
AnnaBridge 167:e84263d55307 110 uint32_t FirstPage = 0, BankNumber = 0;
AnnaBridge 167:e84263d55307 111 uint32_t PAGEError = 0;
AnnaBridge 167:e84263d55307 112 FLASH_EraseInitTypeDef EraseInitStruct;
AnnaBridge 167:e84263d55307 113
AnnaBridge 167:e84263d55307 114 if ((address >= (FLASH_BASE + FLASH_SIZE)) || (address < FLASH_BASE)) {
AnnaBridge 167:e84263d55307 115
AnnaBridge 167:e84263d55307 116 return -1;
AnnaBridge 167:e84263d55307 117 }
AnnaBridge 167:e84263d55307 118
AnnaBridge 167:e84263d55307 119 /* Clear OPTVERR bit set on virgin samples */
AnnaBridge 167:e84263d55307 120 __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_OPTVERR);
AnnaBridge 167:e84263d55307 121 /* Get the 1st page to erase */
AnnaBridge 167:e84263d55307 122 FirstPage = GetPage(address);
AnnaBridge 167:e84263d55307 123 /* MBED HAL erases 1 page / sector at a time */
AnnaBridge 167:e84263d55307 124 /* Get the bank */
AnnaBridge 167:e84263d55307 125 BankNumber = GetBank(address);
AnnaBridge 167:e84263d55307 126 /* Fill EraseInit structure*/
AnnaBridge 167:e84263d55307 127 EraseInitStruct.TypeErase = FLASH_TYPEERASE_PAGES;
AnnaBridge 167:e84263d55307 128 EraseInitStruct.Banks = BankNumber;
AnnaBridge 167:e84263d55307 129 EraseInitStruct.Page = FirstPage;
AnnaBridge 167:e84263d55307 130 EraseInitStruct.NbPages = 1;
AnnaBridge 167:e84263d55307 131
AnnaBridge 167:e84263d55307 132 /* Note: If an erase operation in Flash memory also concerns data in the data or instruction cache,
AnnaBridge 167:e84263d55307 133 you have to make sure that these data are rewritten before they are accessed during code
AnnaBridge 167:e84263d55307 134 execution. If this cannot be done safely, it is recommended to flush the caches by setting the
AnnaBridge 167:e84263d55307 135 DCRST and ICRST bits in the FLASH_CR register. */
AnnaBridge 167:e84263d55307 136
AnnaBridge 167:e84263d55307 137 if (HAL_FLASHEx_Erase(&EraseInitStruct, &PAGEError) != HAL_OK) {
AnnaBridge 167:e84263d55307 138 return -1;
AnnaBridge 167:e84263d55307 139 } else {
AnnaBridge 167:e84263d55307 140 return 0;
AnnaBridge 167:e84263d55307 141 }
AnnaBridge 167:e84263d55307 142 }
AnnaBridge 167:e84263d55307 143
AnnaBridge 167:e84263d55307 144 /** Program one page starting at defined address
AnnaBridge 167:e84263d55307 145 *
AnnaBridge 167:e84263d55307 146 * The page should be at page boundary, should not cross multiple sectors.
AnnaBridge 167:e84263d55307 147 * This function does not do any check for address alignments or if size
AnnaBridge 167:e84263d55307 148 * is aligned to a page size.
AnnaBridge 167:e84263d55307 149 * @param obj The flash object
AnnaBridge 167:e84263d55307 150 * @param address The sector starting address
AnnaBridge 167:e84263d55307 151 * @param data The data buffer to be programmed
AnnaBridge 167:e84263d55307 152 * @param size The number of bytes to program
AnnaBridge 167:e84263d55307 153 * @return 0 for success, -1 for error
AnnaBridge 167:e84263d55307 154 */
AnnaBridge 167:e84263d55307 155 int32_t flash_program_page(flash_t *obj, uint32_t address,
AnnaBridge 167:e84263d55307 156 const uint8_t *data, uint32_t size)
AnnaBridge 167:e84263d55307 157 {
AnnaBridge 167:e84263d55307 158 uint32_t StartAddress = 0;
AnnaBridge 167:e84263d55307 159
AnnaBridge 167:e84263d55307 160 if ((address >= (FLASH_BASE + FLASH_SIZE)) || (address < FLASH_BASE)) {
AnnaBridge 167:e84263d55307 161 return -1;
AnnaBridge 167:e84263d55307 162 }
AnnaBridge 167:e84263d55307 163
AnnaBridge 167:e84263d55307 164 if ((size % 8) != 0) {
AnnaBridge 167:e84263d55307 165 /* L4 flash devices can only be programmed 64bits/8 bytes at a time */
AnnaBridge 167:e84263d55307 166 return -1;
AnnaBridge 167:e84263d55307 167 }
AnnaBridge 167:e84263d55307 168
AnnaBridge 167:e84263d55307 169 /* Program the user Flash area word by word */
AnnaBridge 167:e84263d55307 170 StartAddress = address;
AnnaBridge 167:e84263d55307 171
AnnaBridge 167:e84263d55307 172 /* HW needs an aligned address to program flash, which data
AnnaBridge 167:e84263d55307 173 * parameters doesn't ensure */
AnnaBridge 167:e84263d55307 174 if ((uint32_t) data % 4 != 0) {
AnnaBridge 167:e84263d55307 175 volatile uint64_t data64;
AnnaBridge 167:e84263d55307 176 while (address < (StartAddress + size)) {
AnnaBridge 167:e84263d55307 177 for (uint8_t i =0; i < 8; i++) {
AnnaBridge 167:e84263d55307 178 *(((uint8_t *) &data64) + i) = *(data + i);
AnnaBridge 167:e84263d55307 179 }
AnnaBridge 167:e84263d55307 180
AnnaBridge 167:e84263d55307 181 if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_DOUBLEWORD, address, data64) == HAL_OK) {
AnnaBridge 167:e84263d55307 182 address = address + 8;
AnnaBridge 167:e84263d55307 183 data = data + 8;
AnnaBridge 167:e84263d55307 184 } else {
AnnaBridge 167:e84263d55307 185 return -1;
AnnaBridge 167:e84263d55307 186 }
AnnaBridge 167:e84263d55307 187 }
AnnaBridge 167:e84263d55307 188 } else { /* case where data is aligned, so let's avoid any copy */
AnnaBridge 167:e84263d55307 189 while (address < (StartAddress + size)) {
AnnaBridge 167:e84263d55307 190 if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_DOUBLEWORD, address, *((uint64_t*) data)) == HAL_OK) {
AnnaBridge 167:e84263d55307 191 address = address + 8;
AnnaBridge 167:e84263d55307 192 data = data + 8;
AnnaBridge 167:e84263d55307 193 } else {
AnnaBridge 167:e84263d55307 194 return -1;
AnnaBridge 167:e84263d55307 195 }
AnnaBridge 167:e84263d55307 196 }
AnnaBridge 167:e84263d55307 197 }
AnnaBridge 167:e84263d55307 198
AnnaBridge 167:e84263d55307 199 return 0;
AnnaBridge 167:e84263d55307 200 }
AnnaBridge 167:e84263d55307 201
AnnaBridge 167:e84263d55307 202 /** Get sector size
AnnaBridge 167:e84263d55307 203 *
AnnaBridge 167:e84263d55307 204 * @param obj The flash object
AnnaBridge 167:e84263d55307 205 * @param address The sector starting address
AnnaBridge 167:e84263d55307 206 * @return The size of a sector
AnnaBridge 167:e84263d55307 207 */
AnnaBridge 167:e84263d55307 208 uint32_t flash_get_sector_size(const flash_t *obj, uint32_t address) {
AnnaBridge 167:e84263d55307 209 /* considering 1 sector = 1 page */
AnnaBridge 167:e84263d55307 210 if ((address >= (FLASH_BASE + FLASH_SIZE)) || (address < FLASH_BASE)) {
AnnaBridge 167:e84263d55307 211 return MBED_FLASH_INVALID_SIZE;
AnnaBridge 167:e84263d55307 212 } else {
AnnaBridge 167:e84263d55307 213 return FLASH_PAGE_SIZE;
AnnaBridge 167:e84263d55307 214 }
AnnaBridge 167:e84263d55307 215 }
AnnaBridge 167:e84263d55307 216
AnnaBridge 167:e84263d55307 217 /** Get page size
AnnaBridge 167:e84263d55307 218 *
AnnaBridge 167:e84263d55307 219 * @param obj The flash object
AnnaBridge 167:e84263d55307 220 * @param address The page starting address
AnnaBridge 167:e84263d55307 221 * @return The size of a page
AnnaBridge 167:e84263d55307 222 */
AnnaBridge 167:e84263d55307 223 uint32_t flash_get_page_size(const flash_t *obj) {
AnnaBridge 167:e84263d55307 224 /* considering 1 sector = 1 page */
AnnaBridge 167:e84263d55307 225 return FLASH_PAGE_SIZE;
AnnaBridge 167:e84263d55307 226 }
AnnaBridge 167:e84263d55307 227
AnnaBridge 167:e84263d55307 228 /** Get start address for the flash region
AnnaBridge 167:e84263d55307 229 *
AnnaBridge 167:e84263d55307 230 * @param obj The flash object
AnnaBridge 167:e84263d55307 231 * @return The start address for the flash region
AnnaBridge 167:e84263d55307 232 */
AnnaBridge 167:e84263d55307 233 uint32_t flash_get_start_address(const flash_t *obj) {
AnnaBridge 167:e84263d55307 234 return FLASH_BASE;
AnnaBridge 167:e84263d55307 235 }
AnnaBridge 167:e84263d55307 236
AnnaBridge 167:e84263d55307 237 /** Get the flash region size
AnnaBridge 167:e84263d55307 238 *
AnnaBridge 167:e84263d55307 239 * @param obj The flash object
AnnaBridge 167:e84263d55307 240 * @return The flash region size
AnnaBridge 167:e84263d55307 241 */
AnnaBridge 167:e84263d55307 242 uint32_t flash_get_size(const flash_t *obj) {
AnnaBridge 167:e84263d55307 243 return FLASH_SIZE;
AnnaBridge 167:e84263d55307 244 }
AnnaBridge 167:e84263d55307 245
AnnaBridge 167:e84263d55307 246 #endif