Nothing Special / Mbed 2 deprecated 00_eeprom_emulation_f401

simple test EEPROM emulation for STM32F401 (STM algorithm described in the application notes: AN4061, AN3969, AN2594, AN3390, AN4056).

Dependencies:   mbed

https://developer.mbed.org/questions/69101/Is-there-a-way-to-store-variables-in-a-n/#answer10369?compage=1#c24579



Versions for microcontrollers with smaller flash pages (using several flash pages for each virtual page):

Import program00_eeprom_emulation_f030

EEPROM emulation (STM algorithm described in the application notes: AN4061, AN3969, AN2594, AN3390, AN4056) with added multipage possibility. For Nucleo-F030 and others boards with similar microcontrolers.

Last commit 24 Sep 2016 by Nothing Special



Import program00_eeprom_emulation_f091

simple test EEPROM emulation (STM algorithm described in the application notes: AN4061, AN3969, AN2594, AN3390, AN4056) for STM32F091

Last commit 23 Sep 2016 by Nothing Special

eeprom/eeprom.cpp@0:1756c3542c95, 2016-09-22 (annotated)

Committer:
mega64
Date:
Thu Sep 22 03:54:18 2016 +0000
Revision:
0:1756c3542c95
Child:
1:bc0ee9ad46aa
Protect flash area of EEPROM simulation in case a larger code (dummy variable)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mega64 0:1756c3542c95 1 /**
mega64 0:1756c3542c95 2 ******************************************************************************
mega64 0:1756c3542c95 3 * @file EEPROM/EEPROM_Emulation/src/eeprom.c
mega64 0:1756c3542c95 4 * @author MCD Application Team
mega64 0:1756c3542c95 5 * @version V1.0.1
mega64 0:1756c3542c95 6 * @date 29-January-2016
mega64 0:1756c3542c95 7 * @brief This file provides all the EEPROM emulation firmware functions.
mega64 0:1756c3542c95 8 ******************************************************************************
mega64 0:1756c3542c95 9 * @attention
mega64 0:1756c3542c95 10 *
mega64 0:1756c3542c95 11 * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
mega64 0:1756c3542c95 12 *
mega64 0:1756c3542c95 13 * Redistribution and use in source and binary forms, with or without modification,
mega64 0:1756c3542c95 14 * are permitted provided that the following conditions are met:
mega64 0:1756c3542c95 15 * 1. Redistributions of source code must retain the above copyright notice,
mega64 0:1756c3542c95 16 * this list of conditions and the following disclaimer.
mega64 0:1756c3542c95 17 * 2. Redistributions in binary form must reproduce the above copyright notice,
mega64 0:1756c3542c95 18 * this list of conditions and the following disclaimer in the documentation
mega64 0:1756c3542c95 19 * and/or other materials provided with the distribution.
mega64 0:1756c3542c95 20 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mega64 0:1756c3542c95 21 * may be used to endorse or promote products derived from this software
mega64 0:1756c3542c95 22 * without specific prior written permission.
mega64 0:1756c3542c95 23 *
mega64 0:1756c3542c95 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mega64 0:1756c3542c95 25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mega64 0:1756c3542c95 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mega64 0:1756c3542c95 27 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mega64 0:1756c3542c95 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mega64 0:1756c3542c95 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mega64 0:1756c3542c95 30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mega64 0:1756c3542c95 31 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mega64 0:1756c3542c95 32 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mega64 0:1756c3542c95 33 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mega64 0:1756c3542c95 34 *
mega64 0:1756c3542c95 35 ******************************************************************************
mega64 0:1756c3542c95 36 */
mega64 0:1756c3542c95 37
mega64 0:1756c3542c95 38 /** @addtogroup EEPROM_Emulation
mega64 0:1756c3542c95 39 * @{
mega64 0:1756c3542c95 40 */
mega64 0:1756c3542c95 41
mega64 0:1756c3542c95 42 /* Includes ------------------------------------------------------------------*/
mega64 0:1756c3542c95 43 #include "eeprom.h"
mega64 0:1756c3542c95 44
mega64 0:1756c3542c95 45 /* Private typedef -----------------------------------------------------------*/
mega64 0:1756c3542c95 46 /* Private define ------------------------------------------------------------*/
mega64 0:1756c3542c95 47 /* Private macro -------------------------------------------------------------*/
mega64 0:1756c3542c95 48 /* Private variables ---------------------------------------------------------*/
mega64 0:1756c3542c95 49
mega64 0:1756c3542c95 50 /* Dummy variable to protect eeprom pages if code size is bigger than 32kb (F401)
mega64 0:1756c3542c95 51 needed in Mbed online compiler to avoid conflict with linker (N.S.) */
mega64 0:1756c3542c95 52 const uint8_t Eeprom_area[2 * PAGE_SIZE] __attribute__((at(EEPROM_START_ADDRESS),used))={ [0 ... (2 * PAGE_SIZE-1)] = 0xFF };
mega64 0:1756c3542c95 53
mega64 0:1756c3542c95 54
mega64 0:1756c3542c95 55 /* Global variable used to store variable value in read sequence */
mega64 0:1756c3542c95 56 uint16_t DataVar = 0;
mega64 0:1756c3542c95 57
mega64 0:1756c3542c95 58 /* Virtual address defined by the user: 0xFFFF value is prohibited */
mega64 0:1756c3542c95 59 extern uint16_t VirtAddVarTab[NB_OF_VAR];
mega64 0:1756c3542c95 60
mega64 0:1756c3542c95 61 /* Private function prototypes -----------------------------------------------*/
mega64 0:1756c3542c95 62 /* Private functions ---------------------------------------------------------*/
mega64 0:1756c3542c95 63 static HAL_StatusTypeDef EE_Format(void);
mega64 0:1756c3542c95 64 static uint16_t EE_FindValidPage(uint8_t Operation);
mega64 0:1756c3542c95 65 static uint16_t EE_VerifyPageFullWriteVariable(uint16_t VirtAddress, uint16_t Data);
mega64 0:1756c3542c95 66 static uint16_t EE_PageTransfer(uint16_t VirtAddress, uint16_t Data);
mega64 0:1756c3542c95 67 static uint16_t EE_VerifyPageFullyErased(uint32_t Address);
mega64 0:1756c3542c95 68
mega64 0:1756c3542c95 69 /**
mega64 0:1756c3542c95 70 * @brief Restore the pages to a known good state in case of page's status
mega64 0:1756c3542c95 71 * corruption after a power loss.
mega64 0:1756c3542c95 72 * @param None.
mega64 0:1756c3542c95 73 * @retval - Flash error code: on write Flash error
mega64 0:1756c3542c95 74 * - FLASH_COMPLETE: on success
mega64 0:1756c3542c95 75 */
mega64 0:1756c3542c95 76 uint16_t EE_Init(void)
mega64 0:1756c3542c95 77 {
mega64 0:1756c3542c95 78 uint16_t PageStatus0 = 6, PageStatus1 = 6;
mega64 0:1756c3542c95 79 uint16_t VarIdx = 0;
mega64 0:1756c3542c95 80 uint16_t EepromStatus = 0, ReadStatus = 0;
mega64 0:1756c3542c95 81 int16_t x = -1;
mega64 0:1756c3542c95 82 HAL_StatusTypeDef FlashStatus;
mega64 0:1756c3542c95 83 uint32_t SectorError = 0;
mega64 0:1756c3542c95 84 FLASH_EraseInitTypeDef pEraseInit;
mega64 0:1756c3542c95 85
mega64 0:1756c3542c95 86
mega64 0:1756c3542c95 87 /* Get Page0 status */
mega64 0:1756c3542c95 88 PageStatus0 = (*(__IO uint16_t*)PAGE0_BASE_ADDRESS);
mega64 0:1756c3542c95 89 /* Get Page1 status */
mega64 0:1756c3542c95 90 PageStatus1 = (*(__IO uint16_t*)PAGE1_BASE_ADDRESS);
mega64 0:1756c3542c95 91
mega64 0:1756c3542c95 92 pEraseInit.TypeErase = TYPEERASE_SECTORS;
mega64 0:1756c3542c95 93 pEraseInit.Sector = PAGE0_ID;
mega64 0:1756c3542c95 94 pEraseInit.NbSectors = 1;
mega64 0:1756c3542c95 95 pEraseInit.VoltageRange = VOLTAGE_RANGE;
mega64 0:1756c3542c95 96
mega64 0:1756c3542c95 97 /* Check for invalid header states and repair if necessary */
mega64 0:1756c3542c95 98 switch (PageStatus0)
mega64 0:1756c3542c95 99 {
mega64 0:1756c3542c95 100 case ERASED:
mega64 0:1756c3542c95 101 if (PageStatus1 == VALID_PAGE) /* Page0 erased, Page1 valid */
mega64 0:1756c3542c95 102 {
mega64 0:1756c3542c95 103 /* Erase Page0 */
mega64 0:1756c3542c95 104 if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
mega64 0:1756c3542c95 105 {
mega64 0:1756c3542c95 106 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:1756c3542c95 107 /* If erase operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 108 if (FlashStatus != HAL_OK)
mega64 0:1756c3542c95 109 {
mega64 0:1756c3542c95 110 return FlashStatus;
mega64 0:1756c3542c95 111 }
mega64 0:1756c3542c95 112 }
mega64 0:1756c3542c95 113 }
mega64 0:1756c3542c95 114 else if (PageStatus1 == RECEIVE_DATA) /* Page0 erased, Page1 receive */
mega64 0:1756c3542c95 115 {
mega64 0:1756c3542c95 116 /* Erase Page0 */
mega64 0:1756c3542c95 117 if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
mega64 0:1756c3542c95 118 {
mega64 0:1756c3542c95 119 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:1756c3542c95 120 /* If erase operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 121 if (FlashStatus != HAL_OK)
mega64 0:1756c3542c95 122 {
mega64 0:1756c3542c95 123 return FlashStatus;
mega64 0:1756c3542c95 124 }
mega64 0:1756c3542c95 125 }
mega64 0:1756c3542c95 126 /* Mark Page1 as valid */
mega64 0:1756c3542c95 127 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, PAGE1_BASE_ADDRESS, VALID_PAGE);
mega64 0:1756c3542c95 128 /* If program operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 129 if (FlashStatus != HAL_OK)
mega64 0:1756c3542c95 130 {
mega64 0:1756c3542c95 131 return FlashStatus;
mega64 0:1756c3542c95 132 }
mega64 0:1756c3542c95 133 }
mega64 0:1756c3542c95 134 else /* First EEPROM access (Page0&1 are erased) or invalid state -> format EEPROM */
mega64 0:1756c3542c95 135 {
mega64 0:1756c3542c95 136 /* Erase both Page0 and Page1 and set Page0 as valid page */
mega64 0:1756c3542c95 137 FlashStatus = EE_Format();
mega64 0:1756c3542c95 138 /* If erase/program operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 139 if (FlashStatus != HAL_OK)
mega64 0:1756c3542c95 140 {
mega64 0:1756c3542c95 141 return FlashStatus;
mega64 0:1756c3542c95 142 }
mega64 0:1756c3542c95 143 }
mega64 0:1756c3542c95 144 break;
mega64 0:1756c3542c95 145
mega64 0:1756c3542c95 146 case RECEIVE_DATA:
mega64 0:1756c3542c95 147 if (PageStatus1 == VALID_PAGE) /* Page0 receive, Page1 valid */
mega64 0:1756c3542c95 148 {
mega64 0:1756c3542c95 149 /* Transfer data from Page1 to Page0 */
mega64 0:1756c3542c95 150 for (VarIdx = 0; VarIdx < NB_OF_VAR; VarIdx++)
mega64 0:1756c3542c95 151 {
mega64 0:1756c3542c95 152 if (( *(__IO uint16_t*)(PAGE0_BASE_ADDRESS + 6)) == VirtAddVarTab[VarIdx])
mega64 0:1756c3542c95 153 {
mega64 0:1756c3542c95 154 x = VarIdx;
mega64 0:1756c3542c95 155 }
mega64 0:1756c3542c95 156 if (VarIdx != x)
mega64 0:1756c3542c95 157 {
mega64 0:1756c3542c95 158 /* Read the last variables' updates */
mega64 0:1756c3542c95 159 ReadStatus = EE_ReadVariable(VirtAddVarTab[VarIdx], &DataVar);
mega64 0:1756c3542c95 160 /* In case variable corresponding to the virtual address was found */
mega64 0:1756c3542c95 161 if (ReadStatus != 0x1)
mega64 0:1756c3542c95 162 {
mega64 0:1756c3542c95 163 /* Transfer the variable to the Page0 */
mega64 0:1756c3542c95 164 EepromStatus = EE_VerifyPageFullWriteVariable(VirtAddVarTab[VarIdx], DataVar);
mega64 0:1756c3542c95 165 /* If program operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 166 if (EepromStatus != HAL_OK)
mega64 0:1756c3542c95 167 {
mega64 0:1756c3542c95 168 return EepromStatus;
mega64 0:1756c3542c95 169 }
mega64 0:1756c3542c95 170 }
mega64 0:1756c3542c95 171 }
mega64 0:1756c3542c95 172 }
mega64 0:1756c3542c95 173 /* Mark Page0 as valid */
mega64 0:1756c3542c95 174 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, PAGE0_BASE_ADDRESS, VALID_PAGE);
mega64 0:1756c3542c95 175 /* If program operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 176 if (FlashStatus != HAL_OK)
mega64 0:1756c3542c95 177 {
mega64 0:1756c3542c95 178 return FlashStatus;
mega64 0:1756c3542c95 179 }
mega64 0:1756c3542c95 180 pEraseInit.Sector = PAGE1_ID;
mega64 0:1756c3542c95 181 pEraseInit.NbSectors = 1;
mega64 0:1756c3542c95 182 pEraseInit.VoltageRange = VOLTAGE_RANGE;
mega64 0:1756c3542c95 183 /* Erase Page1 */
mega64 0:1756c3542c95 184 if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
mega64 0:1756c3542c95 185 {
mega64 0:1756c3542c95 186 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:1756c3542c95 187 /* If erase operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 188 if (FlashStatus != HAL_OK)
mega64 0:1756c3542c95 189 {
mega64 0:1756c3542c95 190 return FlashStatus;
mega64 0:1756c3542c95 191 }
mega64 0:1756c3542c95 192 }
mega64 0:1756c3542c95 193 }
mega64 0:1756c3542c95 194 else if (PageStatus1 == ERASED) /* Page0 receive, Page1 erased */
mega64 0:1756c3542c95 195 {
mega64 0:1756c3542c95 196 pEraseInit.Sector = PAGE1_ID;
mega64 0:1756c3542c95 197 pEraseInit.NbSectors = 1;
mega64 0:1756c3542c95 198 pEraseInit.VoltageRange = VOLTAGE_RANGE;
mega64 0:1756c3542c95 199 /* Erase Page1 */
mega64 0:1756c3542c95 200 if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
mega64 0:1756c3542c95 201 {
mega64 0:1756c3542c95 202 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:1756c3542c95 203 /* If erase operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 204 if (FlashStatus != HAL_OK)
mega64 0:1756c3542c95 205 {
mega64 0:1756c3542c95 206 return FlashStatus;
mega64 0:1756c3542c95 207 }
mega64 0:1756c3542c95 208 }
mega64 0:1756c3542c95 209 /* Mark Page0 as valid */
mega64 0:1756c3542c95 210 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, PAGE0_BASE_ADDRESS, VALID_PAGE);
mega64 0:1756c3542c95 211 /* If program operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 212 if (FlashStatus != HAL_OK)
mega64 0:1756c3542c95 213 {
mega64 0:1756c3542c95 214 return FlashStatus;
mega64 0:1756c3542c95 215 }
mega64 0:1756c3542c95 216 }
mega64 0:1756c3542c95 217 else /* Invalid state -> format eeprom */
mega64 0:1756c3542c95 218 {
mega64 0:1756c3542c95 219 /* Erase both Page0 and Page1 and set Page0 as valid page */
mega64 0:1756c3542c95 220 FlashStatus = EE_Format();
mega64 0:1756c3542c95 221 /* If erase/program operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 222 if (FlashStatus != HAL_OK)
mega64 0:1756c3542c95 223 {
mega64 0:1756c3542c95 224 return FlashStatus;
mega64 0:1756c3542c95 225 }
mega64 0:1756c3542c95 226 }
mega64 0:1756c3542c95 227 break;
mega64 0:1756c3542c95 228
mega64 0:1756c3542c95 229 case VALID_PAGE:
mega64 0:1756c3542c95 230 if (PageStatus1 == VALID_PAGE) /* Invalid state -> format eeprom */
mega64 0:1756c3542c95 231 {
mega64 0:1756c3542c95 232 /* Erase both Page0 and Page1 and set Page0 as valid page */
mega64 0:1756c3542c95 233 FlashStatus = EE_Format();
mega64 0:1756c3542c95 234 /* If erase/program operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 235 if (FlashStatus != HAL_OK)
mega64 0:1756c3542c95 236 {
mega64 0:1756c3542c95 237 return FlashStatus;
mega64 0:1756c3542c95 238 }
mega64 0:1756c3542c95 239 }
mega64 0:1756c3542c95 240 else if (PageStatus1 == ERASED) /* Page0 valid, Page1 erased */
mega64 0:1756c3542c95 241 {
mega64 0:1756c3542c95 242 pEraseInit.Sector = PAGE1_ID;
mega64 0:1756c3542c95 243 pEraseInit.NbSectors = 1;
mega64 0:1756c3542c95 244 pEraseInit.VoltageRange = VOLTAGE_RANGE;
mega64 0:1756c3542c95 245 /* Erase Page1 */
mega64 0:1756c3542c95 246 if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
mega64 0:1756c3542c95 247 {
mega64 0:1756c3542c95 248 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:1756c3542c95 249 /* If erase operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 250 if (FlashStatus != HAL_OK)
mega64 0:1756c3542c95 251 {
mega64 0:1756c3542c95 252 return FlashStatus;
mega64 0:1756c3542c95 253 }
mega64 0:1756c3542c95 254 }
mega64 0:1756c3542c95 255 }
mega64 0:1756c3542c95 256 else /* Page0 valid, Page1 receive */
mega64 0:1756c3542c95 257 {
mega64 0:1756c3542c95 258 /* Transfer data from Page0 to Page1 */
mega64 0:1756c3542c95 259 for (VarIdx = 0; VarIdx < NB_OF_VAR; VarIdx++)
mega64 0:1756c3542c95 260 {
mega64 0:1756c3542c95 261 if ((*(__IO uint16_t*)(PAGE1_BASE_ADDRESS + 6)) == VirtAddVarTab[VarIdx])
mega64 0:1756c3542c95 262 {
mega64 0:1756c3542c95 263 x = VarIdx;
mega64 0:1756c3542c95 264 }
mega64 0:1756c3542c95 265 if (VarIdx != x)
mega64 0:1756c3542c95 266 {
mega64 0:1756c3542c95 267 /* Read the last variables' updates */
mega64 0:1756c3542c95 268 ReadStatus = EE_ReadVariable(VirtAddVarTab[VarIdx], &DataVar);
mega64 0:1756c3542c95 269 /* In case variable corresponding to the virtual address was found */
mega64 0:1756c3542c95 270 if (ReadStatus != 0x1)
mega64 0:1756c3542c95 271 {
mega64 0:1756c3542c95 272 /* Transfer the variable to the Page1 */
mega64 0:1756c3542c95 273 EepromStatus = EE_VerifyPageFullWriteVariable(VirtAddVarTab[VarIdx], DataVar);
mega64 0:1756c3542c95 274 /* If program operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 275 if (EepromStatus != HAL_OK)
mega64 0:1756c3542c95 276 {
mega64 0:1756c3542c95 277 return EepromStatus;
mega64 0:1756c3542c95 278 }
mega64 0:1756c3542c95 279 }
mega64 0:1756c3542c95 280 }
mega64 0:1756c3542c95 281 }
mega64 0:1756c3542c95 282 /* Mark Page1 as valid */
mega64 0:1756c3542c95 283 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, PAGE1_BASE_ADDRESS, VALID_PAGE);
mega64 0:1756c3542c95 284 /* If program operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 285 if (FlashStatus != HAL_OK)
mega64 0:1756c3542c95 286 {
mega64 0:1756c3542c95 287 return FlashStatus;
mega64 0:1756c3542c95 288 }
mega64 0:1756c3542c95 289 pEraseInit.Sector = PAGE0_ID;
mega64 0:1756c3542c95 290 pEraseInit.NbSectors = 1;
mega64 0:1756c3542c95 291 pEraseInit.VoltageRange = VOLTAGE_RANGE;
mega64 0:1756c3542c95 292 /* Erase Page0 */
mega64 0:1756c3542c95 293 if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
mega64 0:1756c3542c95 294 {
mega64 0:1756c3542c95 295 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:1756c3542c95 296 /* If erase operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 297 if (FlashStatus != HAL_OK)
mega64 0:1756c3542c95 298 {
mega64 0:1756c3542c95 299 return FlashStatus;
mega64 0:1756c3542c95 300 }
mega64 0:1756c3542c95 301 }
mega64 0:1756c3542c95 302 }
mega64 0:1756c3542c95 303 break;
mega64 0:1756c3542c95 304
mega64 0:1756c3542c95 305 default: /* Any other state -> format eeprom */
mega64 0:1756c3542c95 306 /* Erase both Page0 and Page1 and set Page0 as valid page */
mega64 0:1756c3542c95 307 FlashStatus = EE_Format();
mega64 0:1756c3542c95 308 /* If erase/program operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 309 if (FlashStatus != HAL_OK)
mega64 0:1756c3542c95 310 {
mega64 0:1756c3542c95 311 return FlashStatus;
mega64 0:1756c3542c95 312 }
mega64 0:1756c3542c95 313 break;
mega64 0:1756c3542c95 314 }
mega64 0:1756c3542c95 315
mega64 0:1756c3542c95 316 return HAL_OK;
mega64 0:1756c3542c95 317 }
mega64 0:1756c3542c95 318
mega64 0:1756c3542c95 319 /**
mega64 0:1756c3542c95 320 * @brief Verify if specified page is fully erased.
mega64 0:1756c3542c95 321 * @param Address: page address
mega64 0:1756c3542c95 322 * This parameter can be one of the following values:
mega64 0:1756c3542c95 323 * @arg PAGE0_BASE_ADDRESS: Page0 base address
mega64 0:1756c3542c95 324 * @arg PAGE1_BASE_ADDRESS: Page1 base address
mega64 0:1756c3542c95 325 * @retval page fully erased status:
mega64 0:1756c3542c95 326 * - 0: if Page not erased
mega64 0:1756c3542c95 327 * - 1: if Page erased
mega64 0:1756c3542c95 328 */
mega64 0:1756c3542c95 329 uint16_t EE_VerifyPageFullyErased(uint32_t Address)
mega64 0:1756c3542c95 330 {
mega64 0:1756c3542c95 331 uint32_t ReadStatus = 1;
mega64 0:1756c3542c95 332 uint16_t AddressValue = 0x5555;
mega64 0:1756c3542c95 333
mega64 0:1756c3542c95 334 /* Check each active page address starting from end */
mega64 0:1756c3542c95 335 while (Address <= PAGE0_END_ADDRESS)
mega64 0:1756c3542c95 336 {
mega64 0:1756c3542c95 337 /* Get the current location content to be compared with virtual address */
mega64 0:1756c3542c95 338 AddressValue = (*(__IO uint16_t*)Address);
mega64 0:1756c3542c95 339
mega64 0:1756c3542c95 340 /* Compare the read address with the virtual address */
mega64 0:1756c3542c95 341 if (AddressValue != ERASED)
mega64 0:1756c3542c95 342 {
mega64 0:1756c3542c95 343
mega64 0:1756c3542c95 344 /* In case variable value is read, reset ReadStatus flag */
mega64 0:1756c3542c95 345 ReadStatus = 0;
mega64 0:1756c3542c95 346
mega64 0:1756c3542c95 347 break;
mega64 0:1756c3542c95 348 }
mega64 0:1756c3542c95 349 /* Next address location */
mega64 0:1756c3542c95 350 Address = Address + 4;
mega64 0:1756c3542c95 351 }
mega64 0:1756c3542c95 352
mega64 0:1756c3542c95 353 /* Return ReadStatus value: (0: Page not erased, 1: Sector erased) */
mega64 0:1756c3542c95 354 return ReadStatus;
mega64 0:1756c3542c95 355 }
mega64 0:1756c3542c95 356
mega64 0:1756c3542c95 357 /**
mega64 0:1756c3542c95 358 * @brief Returns the last stored variable data, if found, which correspond to
mega64 0:1756c3542c95 359 * the passed virtual address
mega64 0:1756c3542c95 360 * @param VirtAddress: Variable virtual address
mega64 0:1756c3542c95 361 * @param Data: Global variable contains the read variable value
mega64 0:1756c3542c95 362 * @retval Success or error status:
mega64 0:1756c3542c95 363 * - 0: if variable was found
mega64 0:1756c3542c95 364 * - 1: if the variable was not found
mega64 0:1756c3542c95 365 * - NO_VALID_PAGE: if no valid page was found.
mega64 0:1756c3542c95 366 */
mega64 0:1756c3542c95 367 uint16_t EE_ReadVariable(uint16_t VirtAddress, uint16_t* Data)
mega64 0:1756c3542c95 368 {
mega64 0:1756c3542c95 369 uint16_t ValidPage = PAGE0;
mega64 0:1756c3542c95 370 uint16_t AddressValue = 0x5555, ReadStatus = 1;
mega64 0:1756c3542c95 371 uint32_t Address = EEPROM_START_ADDRESS, PageStartAddress = EEPROM_START_ADDRESS;
mega64 0:1756c3542c95 372
mega64 0:1756c3542c95 373 /* Get active Page for read operation */
mega64 0:1756c3542c95 374 ValidPage = EE_FindValidPage(READ_FROM_VALID_PAGE);
mega64 0:1756c3542c95 375
mega64 0:1756c3542c95 376 /* Check if there is no valid page */
mega64 0:1756c3542c95 377 if (ValidPage == NO_VALID_PAGE)
mega64 0:1756c3542c95 378 {
mega64 0:1756c3542c95 379 return NO_VALID_PAGE;
mega64 0:1756c3542c95 380 }
mega64 0:1756c3542c95 381
mega64 0:1756c3542c95 382 /* Get the valid Page start Address */
mega64 0:1756c3542c95 383 PageStartAddress = (uint32_t)(EEPROM_START_ADDRESS + (uint32_t)(ValidPage * PAGE_SIZE));
mega64 0:1756c3542c95 384
mega64 0:1756c3542c95 385 /* Get the valid Page end Address */
mega64 0:1756c3542c95 386 Address = (uint32_t)((EEPROM_START_ADDRESS - 2) + (uint32_t)((1 + ValidPage) * PAGE_SIZE));
mega64 0:1756c3542c95 387
mega64 0:1756c3542c95 388 /* Check each active page address starting from end */
mega64 0:1756c3542c95 389 while (Address > (PageStartAddress + 2))
mega64 0:1756c3542c95 390 {
mega64 0:1756c3542c95 391 /* Get the current location content to be compared with virtual address */
mega64 0:1756c3542c95 392 AddressValue = (*(__IO uint16_t*)Address);
mega64 0:1756c3542c95 393
mega64 0:1756c3542c95 394 /* Compare the read address with the virtual address */
mega64 0:1756c3542c95 395 if (AddressValue == VirtAddress)
mega64 0:1756c3542c95 396 {
mega64 0:1756c3542c95 397 /* Get content of Address-2 which is variable value */
mega64 0:1756c3542c95 398 *Data = (*(__IO uint16_t*)(Address - 2));
mega64 0:1756c3542c95 399
mega64 0:1756c3542c95 400 /* In case variable value is read, reset ReadStatus flag */
mega64 0:1756c3542c95 401 ReadStatus = 0;
mega64 0:1756c3542c95 402
mega64 0:1756c3542c95 403 break;
mega64 0:1756c3542c95 404 }
mega64 0:1756c3542c95 405 else
mega64 0:1756c3542c95 406 {
mega64 0:1756c3542c95 407 /* Next address location */
mega64 0:1756c3542c95 408 Address = Address - 4;
mega64 0:1756c3542c95 409 }
mega64 0:1756c3542c95 410 }
mega64 0:1756c3542c95 411
mega64 0:1756c3542c95 412 /* Return ReadStatus value: (0: variable exist, 1: variable doesn't exist) */
mega64 0:1756c3542c95 413 return ReadStatus;
mega64 0:1756c3542c95 414 }
mega64 0:1756c3542c95 415
mega64 0:1756c3542c95 416 /**
mega64 0:1756c3542c95 417 * @brief Writes/upadtes variable data in EEPROM.
mega64 0:1756c3542c95 418 * @param VirtAddress: Variable virtual address
mega64 0:1756c3542c95 419 * @param Data: 16 bit data to be written
mega64 0:1756c3542c95 420 * @retval Success or error status:
mega64 0:1756c3542c95 421 * - FLASH_COMPLETE: on success
mega64 0:1756c3542c95 422 * - PAGE_FULL: if valid page is full
mega64 0:1756c3542c95 423 * - NO_VALID_PAGE: if no valid page was found
mega64 0:1756c3542c95 424 * - Flash error code: on write Flash error
mega64 0:1756c3542c95 425 */
mega64 0:1756c3542c95 426 uint16_t EE_WriteVariable(uint16_t VirtAddress, uint16_t Data)
mega64 0:1756c3542c95 427 {
mega64 0:1756c3542c95 428 uint16_t Status = 0;
mega64 0:1756c3542c95 429
mega64 0:1756c3542c95 430 /* Write the variable virtual address and value in the EEPROM */
mega64 0:1756c3542c95 431 Status = EE_VerifyPageFullWriteVariable(VirtAddress, Data);
mega64 0:1756c3542c95 432
mega64 0:1756c3542c95 433 /* In case the EEPROM active page is full */
mega64 0:1756c3542c95 434 if (Status == PAGE_FULL)
mega64 0:1756c3542c95 435 {
mega64 0:1756c3542c95 436 /* Perform Page transfer */
mega64 0:1756c3542c95 437 Status = EE_PageTransfer(VirtAddress, Data);
mega64 0:1756c3542c95 438 }
mega64 0:1756c3542c95 439
mega64 0:1756c3542c95 440 /* Return last operation status */
mega64 0:1756c3542c95 441 return Status;
mega64 0:1756c3542c95 442 }
mega64 0:1756c3542c95 443
mega64 0:1756c3542c95 444 /**
mega64 0:1756c3542c95 445 * @brief Erases PAGE and PAGE1 and writes VALID_PAGE header to PAGE
mega64 0:1756c3542c95 446 * @param None
mega64 0:1756c3542c95 447 * @retval Status of the last operation (Flash write or erase) done during
mega64 0:1756c3542c95 448 * EEPROM formating
mega64 0:1756c3542c95 449 */
mega64 0:1756c3542c95 450 static HAL_StatusTypeDef EE_Format(void)
mega64 0:1756c3542c95 451 {
mega64 0:1756c3542c95 452 HAL_StatusTypeDef FlashStatus = HAL_OK;
mega64 0:1756c3542c95 453 uint32_t SectorError = 0;
mega64 0:1756c3542c95 454 FLASH_EraseInitTypeDef pEraseInit;
mega64 0:1756c3542c95 455
mega64 0:1756c3542c95 456 pEraseInit.TypeErase = FLASH_TYPEERASE_SECTORS;
mega64 0:1756c3542c95 457 pEraseInit.Sector = PAGE0_ID;
mega64 0:1756c3542c95 458 pEraseInit.NbSectors = 1;
mega64 0:1756c3542c95 459 pEraseInit.VoltageRange = VOLTAGE_RANGE;
mega64 0:1756c3542c95 460 /* Erase Page0 */
mega64 0:1756c3542c95 461 if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
mega64 0:1756c3542c95 462 {
mega64 0:1756c3542c95 463 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:1756c3542c95 464 /* If erase operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 465 if (FlashStatus != HAL_OK)
mega64 0:1756c3542c95 466 {
mega64 0:1756c3542c95 467 return FlashStatus;
mega64 0:1756c3542c95 468 }
mega64 0:1756c3542c95 469 }
mega64 0:1756c3542c95 470 /* Set Page0 as valid page: Write VALID_PAGE at Page0 base address */
mega64 0:1756c3542c95 471 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, PAGE0_BASE_ADDRESS, VALID_PAGE);
mega64 0:1756c3542c95 472 /* If program operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 473 if (FlashStatus != HAL_OK)
mega64 0:1756c3542c95 474 {
mega64 0:1756c3542c95 475 return FlashStatus;
mega64 0:1756c3542c95 476 }
mega64 0:1756c3542c95 477
mega64 0:1756c3542c95 478 pEraseInit.Sector = PAGE1_ID;
mega64 0:1756c3542c95 479 /* Erase Page1 */
mega64 0:1756c3542c95 480 if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
mega64 0:1756c3542c95 481 {
mega64 0:1756c3542c95 482 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:1756c3542c95 483 /* If erase operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 484 if (FlashStatus != HAL_OK)
mega64 0:1756c3542c95 485 {
mega64 0:1756c3542c95 486 return FlashStatus;
mega64 0:1756c3542c95 487 }
mega64 0:1756c3542c95 488 }
mega64 0:1756c3542c95 489
mega64 0:1756c3542c95 490 return HAL_OK;
mega64 0:1756c3542c95 491 }
mega64 0:1756c3542c95 492
mega64 0:1756c3542c95 493 /**
mega64 0:1756c3542c95 494 * @brief Find valid Page for write or read operation
mega64 0:1756c3542c95 495 * @param Operation: operation to achieve on the valid page.
mega64 0:1756c3542c95 496 * This parameter can be one of the following values:
mega64 0:1756c3542c95 497 * @arg READ_FROM_VALID_PAGE: read operation from valid page
mega64 0:1756c3542c95 498 * @arg WRITE_IN_VALID_PAGE: write operation from valid page
mega64 0:1756c3542c95 499 * @retval Valid page number (PAGE or PAGE1) or NO_VALID_PAGE in case
mega64 0:1756c3542c95 500 * of no valid page was found
mega64 0:1756c3542c95 501 */
mega64 0:1756c3542c95 502 static uint16_t EE_FindValidPage(uint8_t Operation)
mega64 0:1756c3542c95 503 {
mega64 0:1756c3542c95 504 uint16_t PageStatus0 = 6, PageStatus1 = 6;
mega64 0:1756c3542c95 505
mega64 0:1756c3542c95 506 /* Get Page0 actual status */
mega64 0:1756c3542c95 507 PageStatus0 = (*(__IO uint16_t*)PAGE0_BASE_ADDRESS);
mega64 0:1756c3542c95 508
mega64 0:1756c3542c95 509 /* Get Page1 actual status */
mega64 0:1756c3542c95 510 PageStatus1 = (*(__IO uint16_t*)PAGE1_BASE_ADDRESS);
mega64 0:1756c3542c95 511
mega64 0:1756c3542c95 512 /* Write or read operation */
mega64 0:1756c3542c95 513 switch (Operation)
mega64 0:1756c3542c95 514 {
mega64 0:1756c3542c95 515 case WRITE_IN_VALID_PAGE: /* ---- Write operation ---- */
mega64 0:1756c3542c95 516 if (PageStatus1 == VALID_PAGE)
mega64 0:1756c3542c95 517 {
mega64 0:1756c3542c95 518 /* Page0 receiving data */
mega64 0:1756c3542c95 519 if (PageStatus0 == RECEIVE_DATA)
mega64 0:1756c3542c95 520 {
mega64 0:1756c3542c95 521 return PAGE0; /* Page0 valid */
mega64 0:1756c3542c95 522 }
mega64 0:1756c3542c95 523 else
mega64 0:1756c3542c95 524 {
mega64 0:1756c3542c95 525 return PAGE1; /* Page1 valid */
mega64 0:1756c3542c95 526 }
mega64 0:1756c3542c95 527 }
mega64 0:1756c3542c95 528 else if (PageStatus0 == VALID_PAGE)
mega64 0:1756c3542c95 529 {
mega64 0:1756c3542c95 530 /* Page1 receiving data */
mega64 0:1756c3542c95 531 if (PageStatus1 == RECEIVE_DATA)
mega64 0:1756c3542c95 532 {
mega64 0:1756c3542c95 533 return PAGE1; /* Page1 valid */
mega64 0:1756c3542c95 534 }
mega64 0:1756c3542c95 535 else
mega64 0:1756c3542c95 536 {
mega64 0:1756c3542c95 537 return PAGE0; /* Page0 valid */
mega64 0:1756c3542c95 538 }
mega64 0:1756c3542c95 539 }
mega64 0:1756c3542c95 540 else
mega64 0:1756c3542c95 541 {
mega64 0:1756c3542c95 542 return NO_VALID_PAGE; /* No valid Page */
mega64 0:1756c3542c95 543 }
mega64 0:1756c3542c95 544
mega64 0:1756c3542c95 545 case READ_FROM_VALID_PAGE: /* ---- Read operation ---- */
mega64 0:1756c3542c95 546 if (PageStatus0 == VALID_PAGE)
mega64 0:1756c3542c95 547 {
mega64 0:1756c3542c95 548 return PAGE0; /* Page0 valid */
mega64 0:1756c3542c95 549 }
mega64 0:1756c3542c95 550 else if (PageStatus1 == VALID_PAGE)
mega64 0:1756c3542c95 551 {
mega64 0:1756c3542c95 552 return PAGE1; /* Page1 valid */
mega64 0:1756c3542c95 553 }
mega64 0:1756c3542c95 554 else
mega64 0:1756c3542c95 555 {
mega64 0:1756c3542c95 556 return NO_VALID_PAGE ; /* No valid Page */
mega64 0:1756c3542c95 557 }
mega64 0:1756c3542c95 558
mega64 0:1756c3542c95 559 default:
mega64 0:1756c3542c95 560 return PAGE0; /* Page0 valid */
mega64 0:1756c3542c95 561 }
mega64 0:1756c3542c95 562 }
mega64 0:1756c3542c95 563
mega64 0:1756c3542c95 564 /**
mega64 0:1756c3542c95 565 * @brief Verify if active page is full and Writes variable in EEPROM.
mega64 0:1756c3542c95 566 * @param VirtAddress: 16 bit virtual address of the variable
mega64 0:1756c3542c95 567 * @param Data: 16 bit data to be written as variable value
mega64 0:1756c3542c95 568 * @retval Success or error status:
mega64 0:1756c3542c95 569 * - FLASH_COMPLETE: on success
mega64 0:1756c3542c95 570 * - PAGE_FULL: if valid page is full
mega64 0:1756c3542c95 571 * - NO_VALID_PAGE: if no valid page was found
mega64 0:1756c3542c95 572 * - Flash error code: on write Flash error
mega64 0:1756c3542c95 573 */
mega64 0:1756c3542c95 574 static uint16_t EE_VerifyPageFullWriteVariable(uint16_t VirtAddress, uint16_t Data)
mega64 0:1756c3542c95 575 {
mega64 0:1756c3542c95 576 HAL_StatusTypeDef FlashStatus = HAL_OK;
mega64 0:1756c3542c95 577 uint16_t ValidPage = PAGE0;
mega64 0:1756c3542c95 578 uint32_t Address = EEPROM_START_ADDRESS, PageEndAddress = EEPROM_START_ADDRESS+PAGE_SIZE;
mega64 0:1756c3542c95 579
mega64 0:1756c3542c95 580 /* Get valid Page for write operation */
mega64 0:1756c3542c95 581 ValidPage = EE_FindValidPage(WRITE_IN_VALID_PAGE);
mega64 0:1756c3542c95 582
mega64 0:1756c3542c95 583 /* Check if there is no valid page */
mega64 0:1756c3542c95 584 if (ValidPage == NO_VALID_PAGE)
mega64 0:1756c3542c95 585 {
mega64 0:1756c3542c95 586 return NO_VALID_PAGE;
mega64 0:1756c3542c95 587 }
mega64 0:1756c3542c95 588
mega64 0:1756c3542c95 589 /* Get the valid Page start Address */
mega64 0:1756c3542c95 590 Address = (uint32_t)(EEPROM_START_ADDRESS + (uint32_t)(ValidPage * PAGE_SIZE));
mega64 0:1756c3542c95 591
mega64 0:1756c3542c95 592 /* Get the valid Page end Address */
mega64 0:1756c3542c95 593 PageEndAddress = (uint32_t)((EEPROM_START_ADDRESS - 1) + (uint32_t)((ValidPage + 1) * PAGE_SIZE));
mega64 0:1756c3542c95 594
mega64 0:1756c3542c95 595 /* Check each active page address starting from begining */
mega64 0:1756c3542c95 596 while (Address < PageEndAddress)
mega64 0:1756c3542c95 597 {
mega64 0:1756c3542c95 598 /* Verify if Address and Address+2 contents are 0xFFFFFFFF */
mega64 0:1756c3542c95 599 if ((*(__IO uint32_t*)Address) == 0xFFFFFFFF)
mega64 0:1756c3542c95 600 {
mega64 0:1756c3542c95 601 /* Set variable data */
mega64 0:1756c3542c95 602 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, Address, Data);
mega64 0:1756c3542c95 603 /* If program operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 604 if (FlashStatus != HAL_OK)
mega64 0:1756c3542c95 605 {
mega64 0:1756c3542c95 606 return FlashStatus;
mega64 0:1756c3542c95 607 }
mega64 0:1756c3542c95 608 /* Set variable virtual address */
mega64 0:1756c3542c95 609 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, Address + 2, VirtAddress);
mega64 0:1756c3542c95 610 /* Return program operation status */
mega64 0:1756c3542c95 611 return FlashStatus;
mega64 0:1756c3542c95 612 }
mega64 0:1756c3542c95 613 else
mega64 0:1756c3542c95 614 {
mega64 0:1756c3542c95 615 /* Next address location */
mega64 0:1756c3542c95 616 Address = Address + 4;
mega64 0:1756c3542c95 617 }
mega64 0:1756c3542c95 618 }
mega64 0:1756c3542c95 619
mega64 0:1756c3542c95 620 /* Return PAGE_FULL in case the valid page is full */
mega64 0:1756c3542c95 621 return PAGE_FULL;
mega64 0:1756c3542c95 622 }
mega64 0:1756c3542c95 623
mega64 0:1756c3542c95 624 /**
mega64 0:1756c3542c95 625 * @brief Transfers last updated variables data from the full Page to
mega64 0:1756c3542c95 626 * an empty one.
mega64 0:1756c3542c95 627 * @param VirtAddress: 16 bit virtual address of the variable
mega64 0:1756c3542c95 628 * @param Data: 16 bit data to be written as variable value
mega64 0:1756c3542c95 629 * @retval Success or error status:
mega64 0:1756c3542c95 630 * - FLASH_COMPLETE: on success
mega64 0:1756c3542c95 631 * - PAGE_FULL: if valid page is full
mega64 0:1756c3542c95 632 * - NO_VALID_PAGE: if no valid page was found
mega64 0:1756c3542c95 633 * - Flash error code: on write Flash error
mega64 0:1756c3542c95 634 */
mega64 0:1756c3542c95 635 static uint16_t EE_PageTransfer(uint16_t VirtAddress, uint16_t Data)
mega64 0:1756c3542c95 636 {
mega64 0:1756c3542c95 637 HAL_StatusTypeDef FlashStatus = HAL_OK;
mega64 0:1756c3542c95 638 uint32_t NewPageAddress = EEPROM_START_ADDRESS;
mega64 0:1756c3542c95 639 uint16_t OldPageId=0;
mega64 0:1756c3542c95 640 uint16_t ValidPage = PAGE0, VarIdx = 0;
mega64 0:1756c3542c95 641 uint16_t EepromStatus = 0, ReadStatus = 0;
mega64 0:1756c3542c95 642 uint32_t SectorError = 0;
mega64 0:1756c3542c95 643 FLASH_EraseInitTypeDef pEraseInit;
mega64 0:1756c3542c95 644
mega64 0:1756c3542c95 645 /* Get active Page for read operation */
mega64 0:1756c3542c95 646 ValidPage = EE_FindValidPage(READ_FROM_VALID_PAGE);
mega64 0:1756c3542c95 647
mega64 0:1756c3542c95 648 if (ValidPage == PAGE1) /* Page1 valid */
mega64 0:1756c3542c95 649 {
mega64 0:1756c3542c95 650 /* New page address where variable will be moved to */
mega64 0:1756c3542c95 651 NewPageAddress = PAGE0_BASE_ADDRESS;
mega64 0:1756c3542c95 652
mega64 0:1756c3542c95 653 /* Old page ID where variable will be taken from */
mega64 0:1756c3542c95 654 OldPageId = PAGE1_ID;
mega64 0:1756c3542c95 655 }
mega64 0:1756c3542c95 656 else if (ValidPage == PAGE0) /* Page0 valid */
mega64 0:1756c3542c95 657 {
mega64 0:1756c3542c95 658 /* New page address where variable will be moved to */
mega64 0:1756c3542c95 659 NewPageAddress = PAGE1_BASE_ADDRESS;
mega64 0:1756c3542c95 660
mega64 0:1756c3542c95 661 /* Old page ID where variable will be taken from */
mega64 0:1756c3542c95 662 OldPageId = PAGE0_ID;
mega64 0:1756c3542c95 663 }
mega64 0:1756c3542c95 664 else
mega64 0:1756c3542c95 665 {
mega64 0:1756c3542c95 666 return NO_VALID_PAGE; /* No valid Page */
mega64 0:1756c3542c95 667 }
mega64 0:1756c3542c95 668
mega64 0:1756c3542c95 669 /* Set the new Page status to RECEIVE_DATA status */
mega64 0:1756c3542c95 670 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, NewPageAddress, RECEIVE_DATA);
mega64 0:1756c3542c95 671 /* If program operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 672 if (FlashStatus != HAL_OK)
mega64 0:1756c3542c95 673 {
mega64 0:1756c3542c95 674 return FlashStatus;
mega64 0:1756c3542c95 675 }
mega64 0:1756c3542c95 676
mega64 0:1756c3542c95 677 /* Write the variable passed as parameter in the new active page */
mega64 0:1756c3542c95 678 EepromStatus = EE_VerifyPageFullWriteVariable(VirtAddress, Data);
mega64 0:1756c3542c95 679 /* If program operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 680 if (EepromStatus != HAL_OK)
mega64 0:1756c3542c95 681 {
mega64 0:1756c3542c95 682 return EepromStatus;
mega64 0:1756c3542c95 683 }
mega64 0:1756c3542c95 684
mega64 0:1756c3542c95 685 /* Transfer process: transfer variables from old to the new active page */
mega64 0:1756c3542c95 686 for (VarIdx = 0; VarIdx < NB_OF_VAR; VarIdx++)
mega64 0:1756c3542c95 687 {
mega64 0:1756c3542c95 688 if (VirtAddVarTab[VarIdx] != VirtAddress) /* Check each variable except the one passed as parameter */
mega64 0:1756c3542c95 689 {
mega64 0:1756c3542c95 690 /* Read the other last variable updates */
mega64 0:1756c3542c95 691 ReadStatus = EE_ReadVariable(VirtAddVarTab[VarIdx], &DataVar);
mega64 0:1756c3542c95 692 /* In case variable corresponding to the virtual address was found */
mega64 0:1756c3542c95 693 if (ReadStatus != 0x1)
mega64 0:1756c3542c95 694 {
mega64 0:1756c3542c95 695 /* Transfer the variable to the new active page */
mega64 0:1756c3542c95 696 EepromStatus = EE_VerifyPageFullWriteVariable(VirtAddVarTab[VarIdx], DataVar);
mega64 0:1756c3542c95 697 /* If program operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 698 if (EepromStatus != HAL_OK)
mega64 0:1756c3542c95 699 {
mega64 0:1756c3542c95 700 return EepromStatus;
mega64 0:1756c3542c95 701 }
mega64 0:1756c3542c95 702 }
mega64 0:1756c3542c95 703 }
mega64 0:1756c3542c95 704 }
mega64 0:1756c3542c95 705
mega64 0:1756c3542c95 706 pEraseInit.TypeErase = TYPEERASE_SECTORS;
mega64 0:1756c3542c95 707 pEraseInit.Sector = OldPageId;
mega64 0:1756c3542c95 708 pEraseInit.NbSectors = 1;
mega64 0:1756c3542c95 709 pEraseInit.VoltageRange = VOLTAGE_RANGE;
mega64 0:1756c3542c95 710
mega64 0:1756c3542c95 711 /* Erase the old Page: Set old Page status to ERASED status */
mega64 0:1756c3542c95 712 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:1756c3542c95 713 /* If erase operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 714 if (FlashStatus != HAL_OK)
mega64 0:1756c3542c95 715 {
mega64 0:1756c3542c95 716 return FlashStatus;
mega64 0:1756c3542c95 717 }
mega64 0:1756c3542c95 718
mega64 0:1756c3542c95 719 /* Set new Page status to VALID_PAGE status */
mega64 0:1756c3542c95 720 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, NewPageAddress, VALID_PAGE);
mega64 0:1756c3542c95 721 /* If program operation was failed, a Flash error code is returned */
mega64 0:1756c3542c95 722 if (FlashStatus != HAL_OK)
mega64 0:1756c3542c95 723 {
mega64 0:1756c3542c95 724 return FlashStatus;
mega64 0:1756c3542c95 725 }
mega64 0:1756c3542c95 726
mega64 0:1756c3542c95 727 /* Return last operation flash status */
mega64 0:1756c3542c95 728 return FlashStatus;
mega64 0:1756c3542c95 729 }
mega64 0:1756c3542c95 730
mega64 0:1756c3542c95 731 /**
mega64 0:1756c3542c95 732 * @}
mega64 0:1756c3542c95 733 */
mega64 0:1756c3542c95 734
mega64 0:1756c3542c95 735 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/