Nothing Special / Mbed 2 deprecated 00_eeprom_emulation_f091

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

Dependencies:   mbed

Description in AN4061 from STM.

Changed (compared with the original code AN4061):

  • possibility of a larger size of emulated EEPROM (using multiple Flash pages)
  • dummy variables prevent overwrite code in Flash by algorithm of EEPROM emulation




Macro PAGE_NB_PVP (in eeprom.h) defines the size of the virtual page.
Eg. For F091 where Flash page are 2kB value 4 gives 8kB.

Size 8kB virtual page gives you the ability to use max. approx. 2k of 16-bit variables.

eeprom.cpp@0:bbe849f641a8, 2016-05-29 (annotated)

Committer:
mega64
Date:
Sun May 29 01:22:48 2016 +0000
Revision:
0:bbe849f641a8
simple test

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mega64 0:bbe849f641a8 1 /**
mega64 0:bbe849f641a8 2 ******************************************************************************
mega64 0:bbe849f641a8 3 * @file EEPROM/EEPROM_Emulation/src/eeprom.c
mega64 0:bbe849f641a8 4 * @author MCD Application Team
mega64 0:bbe849f641a8 5 * @version V1.0.1
mega64 0:bbe849f641a8 6 * @date 29-January-2016
mega64 0:bbe849f641a8 7 * @brief This file provides all the EEPROM emulation firmware functions.
mega64 0:bbe849f641a8 8 ******************************************************************************
mega64 0:bbe849f641a8 9 * @attention
mega64 0:bbe849f641a8 10 *
mega64 0:bbe849f641a8 11 * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
mega64 0:bbe849f641a8 12 *
mega64 0:bbe849f641a8 13 * Redistribution and use in source and binary forms, with or without modification,
mega64 0:bbe849f641a8 14 * are permitted provided that the following conditions are met:
mega64 0:bbe849f641a8 15 * 1. Redistributions of source code must retain the above copyright notice,
mega64 0:bbe849f641a8 16 * this list of conditions and the following disclaimer.
mega64 0:bbe849f641a8 17 * 2. Redistributions in binary form must reproduce the above copyright notice,
mega64 0:bbe849f641a8 18 * this list of conditions and the following disclaimer in the documentation
mega64 0:bbe849f641a8 19 * and/or other materials provided with the distribution.
mega64 0:bbe849f641a8 20 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mega64 0:bbe849f641a8 21 * may be used to endorse or promote products derived from this software
mega64 0:bbe849f641a8 22 * without specific prior written permission.
mega64 0:bbe849f641a8 23 *
mega64 0:bbe849f641a8 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mega64 0:bbe849f641a8 25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mega64 0:bbe849f641a8 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mega64 0:bbe849f641a8 27 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mega64 0:bbe849f641a8 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mega64 0:bbe849f641a8 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mega64 0:bbe849f641a8 30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mega64 0:bbe849f641a8 31 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mega64 0:bbe849f641a8 32 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mega64 0:bbe849f641a8 33 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mega64 0:bbe849f641a8 34 *
mega64 0:bbe849f641a8 35 ******************************************************************************
mega64 0:bbe849f641a8 36 */
mega64 0:bbe849f641a8 37
mega64 0:bbe849f641a8 38 /** @addtogroup EEPROM_Emulation
mega64 0:bbe849f641a8 39 * @{
mega64 0:bbe849f641a8 40 */
mega64 0:bbe849f641a8 41
mega64 0:bbe849f641a8 42 /* Includes ------------------------------------------------------------------*/
mega64 0:bbe849f641a8 43 #include "eeprom.h"
mega64 0:bbe849f641a8 44
mega64 0:bbe849f641a8 45 /* Private typedef -----------------------------------------------------------*/
mega64 0:bbe849f641a8 46 /* Private define ------------------------------------------------------------*/
mega64 0:bbe849f641a8 47 /* Private macro -------------------------------------------------------------*/
mega64 0:bbe849f641a8 48 /* Private variables ---------------------------------------------------------*/
mega64 0:bbe849f641a8 49
mega64 0:bbe849f641a8 50 /* Global variable used to store variable value in read sequence */
mega64 0:bbe849f641a8 51 uint16_t DataVar = 0;
mega64 0:bbe849f641a8 52
mega64 0:bbe849f641a8 53 /* Virtual address defined by the user: 0xFFFF value is prohibited */
mega64 0:bbe849f641a8 54 extern uint16_t VirtAddVarTab[NB_OF_VAR];
mega64 0:bbe849f641a8 55
mega64 0:bbe849f641a8 56 /* Private function prototypes -----------------------------------------------*/
mega64 0:bbe849f641a8 57 /* Private functions ---------------------------------------------------------*/
mega64 0:bbe849f641a8 58 static HAL_StatusTypeDef EE_Format(void);
mega64 0:bbe849f641a8 59 static uint16_t EE_FindValidPage(uint8_t Operation);
mega64 0:bbe849f641a8 60 static uint16_t EE_VerifyPageFullWriteVariable(uint16_t VirtAddress, uint16_t Data);
mega64 0:bbe849f641a8 61 static uint16_t EE_PageTransfer(uint16_t VirtAddress, uint16_t Data);
mega64 0:bbe849f641a8 62 static uint16_t EE_VerifyPageFullyErased(uint32_t Address);
mega64 0:bbe849f641a8 63
mega64 0:bbe849f641a8 64 /**
mega64 0:bbe849f641a8 65 * @brief Restore the pages to a known good state in case of page's status
mega64 0:bbe849f641a8 66 * corruption after a power loss.
mega64 0:bbe849f641a8 67 * @param None.
mega64 0:bbe849f641a8 68 * @retval - Flash error code: on write Flash error
mega64 0:bbe849f641a8 69 * - FLASH_COMPLETE: on success
mega64 0:bbe849f641a8 70 */
mega64 0:bbe849f641a8 71 uint16_t EE_Init(void)
mega64 0:bbe849f641a8 72 {
mega64 0:bbe849f641a8 73 uint16_t PageStatus0 = 6, PageStatus1 = 6;
mega64 0:bbe849f641a8 74 uint16_t VarIdx = 0;
mega64 0:bbe849f641a8 75 uint16_t EepromStatus = 0, ReadStatus = 0;
mega64 0:bbe849f641a8 76 int16_t x = -1;
mega64 0:bbe849f641a8 77 HAL_StatusTypeDef FlashStatus;
mega64 0:bbe849f641a8 78 uint32_t SectorError = 0;
mega64 0:bbe849f641a8 79 FLASH_EraseInitTypeDef pEraseInit;
mega64 0:bbe849f641a8 80
mega64 0:bbe849f641a8 81
mega64 0:bbe849f641a8 82 /* Get Page0 status */
mega64 0:bbe849f641a8 83 PageStatus0 = (*(__IO uint16_t*)PAGE0_BASE_ADDRESS);
mega64 0:bbe849f641a8 84 /* Get Page1 status */
mega64 0:bbe849f641a8 85 PageStatus1 = (*(__IO uint16_t*)PAGE1_BASE_ADDRESS);
mega64 0:bbe849f641a8 86
mega64 0:bbe849f641a8 87 pEraseInit.TypeErase = TYPEERASE_SECTORS;
mega64 0:bbe849f641a8 88 pEraseInit.Sector = PAGE0_ID;
mega64 0:bbe849f641a8 89 pEraseInit.NbSectors = 1;
mega64 0:bbe849f641a8 90 pEraseInit.VoltageRange = VOLTAGE_RANGE;
mega64 0:bbe849f641a8 91
mega64 0:bbe849f641a8 92 /* Check for invalid header states and repair if necessary */
mega64 0:bbe849f641a8 93 switch (PageStatus0)
mega64 0:bbe849f641a8 94 {
mega64 0:bbe849f641a8 95 case ERASED:
mega64 0:bbe849f641a8 96 if (PageStatus1 == VALID_PAGE) /* Page0 erased, Page1 valid */
mega64 0:bbe849f641a8 97 {
mega64 0:bbe849f641a8 98 /* Erase Page0 */
mega64 0:bbe849f641a8 99 if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
mega64 0:bbe849f641a8 100 {
mega64 0:bbe849f641a8 101 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:bbe849f641a8 102 /* If erase operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 103 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 104 {
mega64 0:bbe849f641a8 105 return FlashStatus;
mega64 0:bbe849f641a8 106 }
mega64 0:bbe849f641a8 107 }
mega64 0:bbe849f641a8 108 }
mega64 0:bbe849f641a8 109 else if (PageStatus1 == RECEIVE_DATA) /* Page0 erased, Page1 receive */
mega64 0:bbe849f641a8 110 {
mega64 0:bbe849f641a8 111 /* Erase Page0 */
mega64 0:bbe849f641a8 112 if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
mega64 0:bbe849f641a8 113 {
mega64 0:bbe849f641a8 114 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:bbe849f641a8 115 /* If erase operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 116 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 117 {
mega64 0:bbe849f641a8 118 return FlashStatus;
mega64 0:bbe849f641a8 119 }
mega64 0:bbe849f641a8 120 }
mega64 0:bbe849f641a8 121 /* Mark Page1 as valid */
mega64 0:bbe849f641a8 122 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, PAGE1_BASE_ADDRESS, VALID_PAGE);
mega64 0:bbe849f641a8 123 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 124 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 125 {
mega64 0:bbe849f641a8 126 return FlashStatus;
mega64 0:bbe849f641a8 127 }
mega64 0:bbe849f641a8 128 }
mega64 0:bbe849f641a8 129 else /* First EEPROM access (Page0&1 are erased) or invalid state -> format EEPROM */
mega64 0:bbe849f641a8 130 {
mega64 0:bbe849f641a8 131 /* Erase both Page0 and Page1 and set Page0 as valid page */
mega64 0:bbe849f641a8 132 FlashStatus = EE_Format();
mega64 0:bbe849f641a8 133 /* If erase/program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 134 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 135 {
mega64 0:bbe849f641a8 136 return FlashStatus;
mega64 0:bbe849f641a8 137 }
mega64 0:bbe849f641a8 138 }
mega64 0:bbe849f641a8 139 break;
mega64 0:bbe849f641a8 140
mega64 0:bbe849f641a8 141 case RECEIVE_DATA:
mega64 0:bbe849f641a8 142 if (PageStatus1 == VALID_PAGE) /* Page0 receive, Page1 valid */
mega64 0:bbe849f641a8 143 {
mega64 0:bbe849f641a8 144 /* Transfer data from Page1 to Page0 */
mega64 0:bbe849f641a8 145 for (VarIdx = 0; VarIdx < NB_OF_VAR; VarIdx++)
mega64 0:bbe849f641a8 146 {
mega64 0:bbe849f641a8 147 if (( *(__IO uint16_t*)(PAGE0_BASE_ADDRESS + 6)) == VirtAddVarTab[VarIdx])
mega64 0:bbe849f641a8 148 {
mega64 0:bbe849f641a8 149 x = VarIdx;
mega64 0:bbe849f641a8 150 }
mega64 0:bbe849f641a8 151 if (VarIdx != x)
mega64 0:bbe849f641a8 152 {
mega64 0:bbe849f641a8 153 /* Read the last variables' updates */
mega64 0:bbe849f641a8 154 ReadStatus = EE_ReadVariable(VirtAddVarTab[VarIdx], &DataVar);
mega64 0:bbe849f641a8 155 /* In case variable corresponding to the virtual address was found */
mega64 0:bbe849f641a8 156 if (ReadStatus != 0x1)
mega64 0:bbe849f641a8 157 {
mega64 0:bbe849f641a8 158 /* Transfer the variable to the Page0 */
mega64 0:bbe849f641a8 159 EepromStatus = EE_VerifyPageFullWriteVariable(VirtAddVarTab[VarIdx], DataVar);
mega64 0:bbe849f641a8 160 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 161 if (EepromStatus != HAL_OK)
mega64 0:bbe849f641a8 162 {
mega64 0:bbe849f641a8 163 return EepromStatus;
mega64 0:bbe849f641a8 164 }
mega64 0:bbe849f641a8 165 }
mega64 0:bbe849f641a8 166 }
mega64 0:bbe849f641a8 167 }
mega64 0:bbe849f641a8 168 /* Mark Page0 as valid */
mega64 0:bbe849f641a8 169 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, PAGE0_BASE_ADDRESS, VALID_PAGE);
mega64 0:bbe849f641a8 170 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 171 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 172 {
mega64 0:bbe849f641a8 173 return FlashStatus;
mega64 0:bbe849f641a8 174 }
mega64 0:bbe849f641a8 175 pEraseInit.Sector = PAGE1_ID;
mega64 0:bbe849f641a8 176 pEraseInit.NbSectors = 1;
mega64 0:bbe849f641a8 177 pEraseInit.VoltageRange = VOLTAGE_RANGE;
mega64 0:bbe849f641a8 178 /* Erase Page1 */
mega64 0:bbe849f641a8 179 if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
mega64 0:bbe849f641a8 180 {
mega64 0:bbe849f641a8 181 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:bbe849f641a8 182 /* If erase operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 183 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 184 {
mega64 0:bbe849f641a8 185 return FlashStatus;
mega64 0:bbe849f641a8 186 }
mega64 0:bbe849f641a8 187 }
mega64 0:bbe849f641a8 188 }
mega64 0:bbe849f641a8 189 else if (PageStatus1 == ERASED) /* Page0 receive, Page1 erased */
mega64 0:bbe849f641a8 190 {
mega64 0:bbe849f641a8 191 pEraseInit.Sector = PAGE1_ID;
mega64 0:bbe849f641a8 192 pEraseInit.NbSectors = 1;
mega64 0:bbe849f641a8 193 pEraseInit.VoltageRange = VOLTAGE_RANGE;
mega64 0:bbe849f641a8 194 /* Erase Page1 */
mega64 0:bbe849f641a8 195 if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
mega64 0:bbe849f641a8 196 {
mega64 0:bbe849f641a8 197 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:bbe849f641a8 198 /* If erase operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 199 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 200 {
mega64 0:bbe849f641a8 201 return FlashStatus;
mega64 0:bbe849f641a8 202 }
mega64 0:bbe849f641a8 203 }
mega64 0:bbe849f641a8 204 /* Mark Page0 as valid */
mega64 0:bbe849f641a8 205 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, PAGE0_BASE_ADDRESS, VALID_PAGE);
mega64 0:bbe849f641a8 206 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 207 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 208 {
mega64 0:bbe849f641a8 209 return FlashStatus;
mega64 0:bbe849f641a8 210 }
mega64 0:bbe849f641a8 211 }
mega64 0:bbe849f641a8 212 else /* Invalid state -> format eeprom */
mega64 0:bbe849f641a8 213 {
mega64 0:bbe849f641a8 214 /* Erase both Page0 and Page1 and set Page0 as valid page */
mega64 0:bbe849f641a8 215 FlashStatus = EE_Format();
mega64 0:bbe849f641a8 216 /* If erase/program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 217 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 218 {
mega64 0:bbe849f641a8 219 return FlashStatus;
mega64 0:bbe849f641a8 220 }
mega64 0:bbe849f641a8 221 }
mega64 0:bbe849f641a8 222 break;
mega64 0:bbe849f641a8 223
mega64 0:bbe849f641a8 224 case VALID_PAGE:
mega64 0:bbe849f641a8 225 if (PageStatus1 == VALID_PAGE) /* Invalid state -> format eeprom */
mega64 0:bbe849f641a8 226 {
mega64 0:bbe849f641a8 227 /* Erase both Page0 and Page1 and set Page0 as valid page */
mega64 0:bbe849f641a8 228 FlashStatus = EE_Format();
mega64 0:bbe849f641a8 229 /* If erase/program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 230 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 231 {
mega64 0:bbe849f641a8 232 return FlashStatus;
mega64 0:bbe849f641a8 233 }
mega64 0:bbe849f641a8 234 }
mega64 0:bbe849f641a8 235 else if (PageStatus1 == ERASED) /* Page0 valid, Page1 erased */
mega64 0:bbe849f641a8 236 {
mega64 0:bbe849f641a8 237 pEraseInit.Sector = PAGE1_ID;
mega64 0:bbe849f641a8 238 pEraseInit.NbSectors = 1;
mega64 0:bbe849f641a8 239 pEraseInit.VoltageRange = VOLTAGE_RANGE;
mega64 0:bbe849f641a8 240 /* Erase Page1 */
mega64 0:bbe849f641a8 241 if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
mega64 0:bbe849f641a8 242 {
mega64 0:bbe849f641a8 243 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:bbe849f641a8 244 /* If erase operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 245 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 246 {
mega64 0:bbe849f641a8 247 return FlashStatus;
mega64 0:bbe849f641a8 248 }
mega64 0:bbe849f641a8 249 }
mega64 0:bbe849f641a8 250 }
mega64 0:bbe849f641a8 251 else /* Page0 valid, Page1 receive */
mega64 0:bbe849f641a8 252 {
mega64 0:bbe849f641a8 253 /* Transfer data from Page0 to Page1 */
mega64 0:bbe849f641a8 254 for (VarIdx = 0; VarIdx < NB_OF_VAR; VarIdx++)
mega64 0:bbe849f641a8 255 {
mega64 0:bbe849f641a8 256 if ((*(__IO uint16_t*)(PAGE1_BASE_ADDRESS + 6)) == VirtAddVarTab[VarIdx])
mega64 0:bbe849f641a8 257 {
mega64 0:bbe849f641a8 258 x = VarIdx;
mega64 0:bbe849f641a8 259 }
mega64 0:bbe849f641a8 260 if (VarIdx != x)
mega64 0:bbe849f641a8 261 {
mega64 0:bbe849f641a8 262 /* Read the last variables' updates */
mega64 0:bbe849f641a8 263 ReadStatus = EE_ReadVariable(VirtAddVarTab[VarIdx], &DataVar);
mega64 0:bbe849f641a8 264 /* In case variable corresponding to the virtual address was found */
mega64 0:bbe849f641a8 265 if (ReadStatus != 0x1)
mega64 0:bbe849f641a8 266 {
mega64 0:bbe849f641a8 267 /* Transfer the variable to the Page1 */
mega64 0:bbe849f641a8 268 EepromStatus = EE_VerifyPageFullWriteVariable(VirtAddVarTab[VarIdx], DataVar);
mega64 0:bbe849f641a8 269 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 270 if (EepromStatus != HAL_OK)
mega64 0:bbe849f641a8 271 {
mega64 0:bbe849f641a8 272 return EepromStatus;
mega64 0:bbe849f641a8 273 }
mega64 0:bbe849f641a8 274 }
mega64 0:bbe849f641a8 275 }
mega64 0:bbe849f641a8 276 }
mega64 0:bbe849f641a8 277 /* Mark Page1 as valid */
mega64 0:bbe849f641a8 278 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, PAGE1_BASE_ADDRESS, VALID_PAGE);
mega64 0:bbe849f641a8 279 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 280 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 281 {
mega64 0:bbe849f641a8 282 return FlashStatus;
mega64 0:bbe849f641a8 283 }
mega64 0:bbe849f641a8 284 pEraseInit.Sector = PAGE0_ID;
mega64 0:bbe849f641a8 285 pEraseInit.NbSectors = 1;
mega64 0:bbe849f641a8 286 pEraseInit.VoltageRange = VOLTAGE_RANGE;
mega64 0:bbe849f641a8 287 /* Erase Page0 */
mega64 0:bbe849f641a8 288 if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
mega64 0:bbe849f641a8 289 {
mega64 0:bbe849f641a8 290 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:bbe849f641a8 291 /* If erase operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 292 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 293 {
mega64 0:bbe849f641a8 294 return FlashStatus;
mega64 0:bbe849f641a8 295 }
mega64 0:bbe849f641a8 296 }
mega64 0:bbe849f641a8 297 }
mega64 0:bbe849f641a8 298 break;
mega64 0:bbe849f641a8 299
mega64 0:bbe849f641a8 300 default: /* Any other state -> format eeprom */
mega64 0:bbe849f641a8 301 /* Erase both Page0 and Page1 and set Page0 as valid page */
mega64 0:bbe849f641a8 302 FlashStatus = EE_Format();
mega64 0:bbe849f641a8 303 /* If erase/program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 304 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 305 {
mega64 0:bbe849f641a8 306 return FlashStatus;
mega64 0:bbe849f641a8 307 }
mega64 0:bbe849f641a8 308 break;
mega64 0:bbe849f641a8 309 }
mega64 0:bbe849f641a8 310
mega64 0:bbe849f641a8 311 return HAL_OK;
mega64 0:bbe849f641a8 312 }
mega64 0:bbe849f641a8 313
mega64 0:bbe849f641a8 314 /**
mega64 0:bbe849f641a8 315 * @brief Verify if specified page is fully erased.
mega64 0:bbe849f641a8 316 * @param Address: page address
mega64 0:bbe849f641a8 317 * This parameter can be one of the following values:
mega64 0:bbe849f641a8 318 * @arg PAGE0_BASE_ADDRESS: Page0 base address
mega64 0:bbe849f641a8 319 * @arg PAGE1_BASE_ADDRESS: Page1 base address
mega64 0:bbe849f641a8 320 * @retval page fully erased status:
mega64 0:bbe849f641a8 321 * - 0: if Page not erased
mega64 0:bbe849f641a8 322 * - 1: if Page erased
mega64 0:bbe849f641a8 323 */
mega64 0:bbe849f641a8 324 uint16_t EE_VerifyPageFullyErased(uint32_t Address)
mega64 0:bbe849f641a8 325 {
mega64 0:bbe849f641a8 326 uint32_t ReadStatus = 1;
mega64 0:bbe849f641a8 327 uint16_t AddressValue = 0x5555;
mega64 0:bbe849f641a8 328
mega64 0:bbe849f641a8 329 /* Check each active page address starting from end */
mega64 0:bbe849f641a8 330 while (Address <= PAGE0_END_ADDRESS)
mega64 0:bbe849f641a8 331 {
mega64 0:bbe849f641a8 332 /* Get the current location content to be compared with virtual address */
mega64 0:bbe849f641a8 333 AddressValue = (*(__IO uint16_t*)Address);
mega64 0:bbe849f641a8 334
mega64 0:bbe849f641a8 335 /* Compare the read address with the virtual address */
mega64 0:bbe849f641a8 336 if (AddressValue != ERASED)
mega64 0:bbe849f641a8 337 {
mega64 0:bbe849f641a8 338
mega64 0:bbe849f641a8 339 /* In case variable value is read, reset ReadStatus flag */
mega64 0:bbe849f641a8 340 ReadStatus = 0;
mega64 0:bbe849f641a8 341
mega64 0:bbe849f641a8 342 break;
mega64 0:bbe849f641a8 343 }
mega64 0:bbe849f641a8 344 /* Next address location */
mega64 0:bbe849f641a8 345 Address = Address + 4;
mega64 0:bbe849f641a8 346 }
mega64 0:bbe849f641a8 347
mega64 0:bbe849f641a8 348 /* Return ReadStatus value: (0: Page not erased, 1: Sector erased) */
mega64 0:bbe849f641a8 349 return ReadStatus;
mega64 0:bbe849f641a8 350 }
mega64 0:bbe849f641a8 351
mega64 0:bbe849f641a8 352 /**
mega64 0:bbe849f641a8 353 * @brief Returns the last stored variable data, if found, which correspond to
mega64 0:bbe849f641a8 354 * the passed virtual address
mega64 0:bbe849f641a8 355 * @param VirtAddress: Variable virtual address
mega64 0:bbe849f641a8 356 * @param Data: Global variable contains the read variable value
mega64 0:bbe849f641a8 357 * @retval Success or error status:
mega64 0:bbe849f641a8 358 * - 0: if variable was found
mega64 0:bbe849f641a8 359 * - 1: if the variable was not found
mega64 0:bbe849f641a8 360 * - NO_VALID_PAGE: if no valid page was found.
mega64 0:bbe849f641a8 361 */
mega64 0:bbe849f641a8 362 uint16_t EE_ReadVariable(uint16_t VirtAddress, uint16_t* Data)
mega64 0:bbe849f641a8 363 {
mega64 0:bbe849f641a8 364 uint16_t ValidPage = PAGE0;
mega64 0:bbe849f641a8 365 uint16_t AddressValue = 0x5555, ReadStatus = 1;
mega64 0:bbe849f641a8 366 uint32_t Address = EEPROM_START_ADDRESS, PageStartAddress = EEPROM_START_ADDRESS;
mega64 0:bbe849f641a8 367
mega64 0:bbe849f641a8 368 /* Get active Page for read operation */
mega64 0:bbe849f641a8 369 ValidPage = EE_FindValidPage(READ_FROM_VALID_PAGE);
mega64 0:bbe849f641a8 370
mega64 0:bbe849f641a8 371 /* Check if there is no valid page */
mega64 0:bbe849f641a8 372 if (ValidPage == NO_VALID_PAGE)
mega64 0:bbe849f641a8 373 {
mega64 0:bbe849f641a8 374 return NO_VALID_PAGE;
mega64 0:bbe849f641a8 375 }
mega64 0:bbe849f641a8 376
mega64 0:bbe849f641a8 377 /* Get the valid Page start Address */
mega64 0:bbe849f641a8 378 PageStartAddress = (uint32_t)(EEPROM_START_ADDRESS + (uint32_t)(ValidPage * PAGE_SIZE));
mega64 0:bbe849f641a8 379
mega64 0:bbe849f641a8 380 /* Get the valid Page end Address */
mega64 0:bbe849f641a8 381 Address = (uint32_t)((EEPROM_START_ADDRESS - 2) + (uint32_t)((1 + ValidPage) * PAGE_SIZE));
mega64 0:bbe849f641a8 382
mega64 0:bbe849f641a8 383 /* Check each active page address starting from end */
mega64 0:bbe849f641a8 384 while (Address > (PageStartAddress + 2))
mega64 0:bbe849f641a8 385 {
mega64 0:bbe849f641a8 386 /* Get the current location content to be compared with virtual address */
mega64 0:bbe849f641a8 387 AddressValue = (*(__IO uint16_t*)Address);
mega64 0:bbe849f641a8 388
mega64 0:bbe849f641a8 389 /* Compare the read address with the virtual address */
mega64 0:bbe849f641a8 390 if (AddressValue == VirtAddress)
mega64 0:bbe849f641a8 391 {
mega64 0:bbe849f641a8 392 /* Get content of Address-2 which is variable value */
mega64 0:bbe849f641a8 393 *Data = (*(__IO uint16_t*)(Address - 2));
mega64 0:bbe849f641a8 394
mega64 0:bbe849f641a8 395 /* In case variable value is read, reset ReadStatus flag */
mega64 0:bbe849f641a8 396 ReadStatus = 0;
mega64 0:bbe849f641a8 397
mega64 0:bbe849f641a8 398 break;
mega64 0:bbe849f641a8 399 }
mega64 0:bbe849f641a8 400 else
mega64 0:bbe849f641a8 401 {
mega64 0:bbe849f641a8 402 /* Next address location */
mega64 0:bbe849f641a8 403 Address = Address - 4;
mega64 0:bbe849f641a8 404 }
mega64 0:bbe849f641a8 405 }
mega64 0:bbe849f641a8 406
mega64 0:bbe849f641a8 407 /* Return ReadStatus value: (0: variable exist, 1: variable doesn't exist) */
mega64 0:bbe849f641a8 408 return ReadStatus;
mega64 0:bbe849f641a8 409 }
mega64 0:bbe849f641a8 410
mega64 0:bbe849f641a8 411 /**
mega64 0:bbe849f641a8 412 * @brief Writes/upadtes variable data in EEPROM.
mega64 0:bbe849f641a8 413 * @param VirtAddress: Variable virtual address
mega64 0:bbe849f641a8 414 * @param Data: 16 bit data to be written
mega64 0:bbe849f641a8 415 * @retval Success or error status:
mega64 0:bbe849f641a8 416 * - FLASH_COMPLETE: on success
mega64 0:bbe849f641a8 417 * - PAGE_FULL: if valid page is full
mega64 0:bbe849f641a8 418 * - NO_VALID_PAGE: if no valid page was found
mega64 0:bbe849f641a8 419 * - Flash error code: on write Flash error
mega64 0:bbe849f641a8 420 */
mega64 0:bbe849f641a8 421 uint16_t EE_WriteVariable(uint16_t VirtAddress, uint16_t Data)
mega64 0:bbe849f641a8 422 {
mega64 0:bbe849f641a8 423 uint16_t Status = 0;
mega64 0:bbe849f641a8 424
mega64 0:bbe849f641a8 425 /* Write the variable virtual address and value in the EEPROM */
mega64 0:bbe849f641a8 426 Status = EE_VerifyPageFullWriteVariable(VirtAddress, Data);
mega64 0:bbe849f641a8 427
mega64 0:bbe849f641a8 428 /* In case the EEPROM active page is full */
mega64 0:bbe849f641a8 429 if (Status == PAGE_FULL)
mega64 0:bbe849f641a8 430 {
mega64 0:bbe849f641a8 431 /* Perform Page transfer */
mega64 0:bbe849f641a8 432 Status = EE_PageTransfer(VirtAddress, Data);
mega64 0:bbe849f641a8 433 }
mega64 0:bbe849f641a8 434
mega64 0:bbe849f641a8 435 /* Return last operation status */
mega64 0:bbe849f641a8 436 return Status;
mega64 0:bbe849f641a8 437 }
mega64 0:bbe849f641a8 438
mega64 0:bbe849f641a8 439 /**
mega64 0:bbe849f641a8 440 * @brief Erases PAGE and PAGE1 and writes VALID_PAGE header to PAGE
mega64 0:bbe849f641a8 441 * @param None
mega64 0:bbe849f641a8 442 * @retval Status of the last operation (Flash write or erase) done during
mega64 0:bbe849f641a8 443 * EEPROM formating
mega64 0:bbe849f641a8 444 */
mega64 0:bbe849f641a8 445 static HAL_StatusTypeDef EE_Format(void)
mega64 0:bbe849f641a8 446 {
mega64 0:bbe849f641a8 447 HAL_StatusTypeDef FlashStatus = HAL_OK;
mega64 0:bbe849f641a8 448 uint32_t SectorError = 0;
mega64 0:bbe849f641a8 449 FLASH_EraseInitTypeDef pEraseInit;
mega64 0:bbe849f641a8 450
mega64 0:bbe849f641a8 451 pEraseInit.TypeErase = FLASH_TYPEERASE_SECTORS;
mega64 0:bbe849f641a8 452 pEraseInit.Sector = PAGE0_ID;
mega64 0:bbe849f641a8 453 pEraseInit.NbSectors = 1;
mega64 0:bbe849f641a8 454 pEraseInit.VoltageRange = VOLTAGE_RANGE;
mega64 0:bbe849f641a8 455 /* Erase Page0 */
mega64 0:bbe849f641a8 456 if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
mega64 0:bbe849f641a8 457 {
mega64 0:bbe849f641a8 458 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:bbe849f641a8 459 /* If erase operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 460 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 461 {
mega64 0:bbe849f641a8 462 return FlashStatus;
mega64 0:bbe849f641a8 463 }
mega64 0:bbe849f641a8 464 }
mega64 0:bbe849f641a8 465 /* Set Page0 as valid page: Write VALID_PAGE at Page0 base address */
mega64 0:bbe849f641a8 466 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, PAGE0_BASE_ADDRESS, VALID_PAGE);
mega64 0:bbe849f641a8 467 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 468 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 469 {
mega64 0:bbe849f641a8 470 return FlashStatus;
mega64 0:bbe849f641a8 471 }
mega64 0:bbe849f641a8 472
mega64 0:bbe849f641a8 473 pEraseInit.Sector = PAGE1_ID;
mega64 0:bbe849f641a8 474 /* Erase Page1 */
mega64 0:bbe849f641a8 475 if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
mega64 0:bbe849f641a8 476 {
mega64 0:bbe849f641a8 477 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:bbe849f641a8 478 /* If erase operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 479 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 480 {
mega64 0:bbe849f641a8 481 return FlashStatus;
mega64 0:bbe849f641a8 482 }
mega64 0:bbe849f641a8 483 }
mega64 0:bbe849f641a8 484
mega64 0:bbe849f641a8 485 return HAL_OK;
mega64 0:bbe849f641a8 486 }
mega64 0:bbe849f641a8 487
mega64 0:bbe849f641a8 488 /**
mega64 0:bbe849f641a8 489 * @brief Find valid Page for write or read operation
mega64 0:bbe849f641a8 490 * @param Operation: operation to achieve on the valid page.
mega64 0:bbe849f641a8 491 * This parameter can be one of the following values:
mega64 0:bbe849f641a8 492 * @arg READ_FROM_VALID_PAGE: read operation from valid page
mega64 0:bbe849f641a8 493 * @arg WRITE_IN_VALID_PAGE: write operation from valid page
mega64 0:bbe849f641a8 494 * @retval Valid page number (PAGE or PAGE1) or NO_VALID_PAGE in case
mega64 0:bbe849f641a8 495 * of no valid page was found
mega64 0:bbe849f641a8 496 */
mega64 0:bbe849f641a8 497 static uint16_t EE_FindValidPage(uint8_t Operation)
mega64 0:bbe849f641a8 498 {
mega64 0:bbe849f641a8 499 uint16_t PageStatus0 = 6, PageStatus1 = 6;
mega64 0:bbe849f641a8 500
mega64 0:bbe849f641a8 501 /* Get Page0 actual status */
mega64 0:bbe849f641a8 502 PageStatus0 = (*(__IO uint16_t*)PAGE0_BASE_ADDRESS);
mega64 0:bbe849f641a8 503
mega64 0:bbe849f641a8 504 /* Get Page1 actual status */
mega64 0:bbe849f641a8 505 PageStatus1 = (*(__IO uint16_t*)PAGE1_BASE_ADDRESS);
mega64 0:bbe849f641a8 506
mega64 0:bbe849f641a8 507 /* Write or read operation */
mega64 0:bbe849f641a8 508 switch (Operation)
mega64 0:bbe849f641a8 509 {
mega64 0:bbe849f641a8 510 case WRITE_IN_VALID_PAGE: /* ---- Write operation ---- */
mega64 0:bbe849f641a8 511 if (PageStatus1 == VALID_PAGE)
mega64 0:bbe849f641a8 512 {
mega64 0:bbe849f641a8 513 /* Page0 receiving data */
mega64 0:bbe849f641a8 514 if (PageStatus0 == RECEIVE_DATA)
mega64 0:bbe849f641a8 515 {
mega64 0:bbe849f641a8 516 return PAGE0; /* Page0 valid */
mega64 0:bbe849f641a8 517 }
mega64 0:bbe849f641a8 518 else
mega64 0:bbe849f641a8 519 {
mega64 0:bbe849f641a8 520 return PAGE1; /* Page1 valid */
mega64 0:bbe849f641a8 521 }
mega64 0:bbe849f641a8 522 }
mega64 0:bbe849f641a8 523 else if (PageStatus0 == VALID_PAGE)
mega64 0:bbe849f641a8 524 {
mega64 0:bbe849f641a8 525 /* Page1 receiving data */
mega64 0:bbe849f641a8 526 if (PageStatus1 == RECEIVE_DATA)
mega64 0:bbe849f641a8 527 {
mega64 0:bbe849f641a8 528 return PAGE1; /* Page1 valid */
mega64 0:bbe849f641a8 529 }
mega64 0:bbe849f641a8 530 else
mega64 0:bbe849f641a8 531 {
mega64 0:bbe849f641a8 532 return PAGE0; /* Page0 valid */
mega64 0:bbe849f641a8 533 }
mega64 0:bbe849f641a8 534 }
mega64 0:bbe849f641a8 535 else
mega64 0:bbe849f641a8 536 {
mega64 0:bbe849f641a8 537 return NO_VALID_PAGE; /* No valid Page */
mega64 0:bbe849f641a8 538 }
mega64 0:bbe849f641a8 539
mega64 0:bbe849f641a8 540 case READ_FROM_VALID_PAGE: /* ---- Read operation ---- */
mega64 0:bbe849f641a8 541 if (PageStatus0 == VALID_PAGE)
mega64 0:bbe849f641a8 542 {
mega64 0:bbe849f641a8 543 return PAGE0; /* Page0 valid */
mega64 0:bbe849f641a8 544 }
mega64 0:bbe849f641a8 545 else if (PageStatus1 == VALID_PAGE)
mega64 0:bbe849f641a8 546 {
mega64 0:bbe849f641a8 547 return PAGE1; /* Page1 valid */
mega64 0:bbe849f641a8 548 }
mega64 0:bbe849f641a8 549 else
mega64 0:bbe849f641a8 550 {
mega64 0:bbe849f641a8 551 return NO_VALID_PAGE ; /* No valid Page */
mega64 0:bbe849f641a8 552 }
mega64 0:bbe849f641a8 553
mega64 0:bbe849f641a8 554 default:
mega64 0:bbe849f641a8 555 return PAGE0; /* Page0 valid */
mega64 0:bbe849f641a8 556 }
mega64 0:bbe849f641a8 557 }
mega64 0:bbe849f641a8 558
mega64 0:bbe849f641a8 559 /**
mega64 0:bbe849f641a8 560 * @brief Verify if active page is full and Writes variable in EEPROM.
mega64 0:bbe849f641a8 561 * @param VirtAddress: 16 bit virtual address of the variable
mega64 0:bbe849f641a8 562 * @param Data: 16 bit data to be written as variable value
mega64 0:bbe849f641a8 563 * @retval Success or error status:
mega64 0:bbe849f641a8 564 * - FLASH_COMPLETE: on success
mega64 0:bbe849f641a8 565 * - PAGE_FULL: if valid page is full
mega64 0:bbe849f641a8 566 * - NO_VALID_PAGE: if no valid page was found
mega64 0:bbe849f641a8 567 * - Flash error code: on write Flash error
mega64 0:bbe849f641a8 568 */
mega64 0:bbe849f641a8 569 static uint16_t EE_VerifyPageFullWriteVariable(uint16_t VirtAddress, uint16_t Data)
mega64 0:bbe849f641a8 570 {
mega64 0:bbe849f641a8 571 HAL_StatusTypeDef FlashStatus = HAL_OK;
mega64 0:bbe849f641a8 572 uint16_t ValidPage = PAGE0;
mega64 0:bbe849f641a8 573 uint32_t Address = EEPROM_START_ADDRESS, PageEndAddress = EEPROM_START_ADDRESS+PAGE_SIZE;
mega64 0:bbe849f641a8 574
mega64 0:bbe849f641a8 575 /* Get valid Page for write operation */
mega64 0:bbe849f641a8 576 ValidPage = EE_FindValidPage(WRITE_IN_VALID_PAGE);
mega64 0:bbe849f641a8 577
mega64 0:bbe849f641a8 578 /* Check if there is no valid page */
mega64 0:bbe849f641a8 579 if (ValidPage == NO_VALID_PAGE)
mega64 0:bbe849f641a8 580 {
mega64 0:bbe849f641a8 581 return NO_VALID_PAGE;
mega64 0:bbe849f641a8 582 }
mega64 0:bbe849f641a8 583
mega64 0:bbe849f641a8 584 /* Get the valid Page start Address */
mega64 0:bbe849f641a8 585 Address = (uint32_t)(EEPROM_START_ADDRESS + (uint32_t)(ValidPage * PAGE_SIZE));
mega64 0:bbe849f641a8 586
mega64 0:bbe849f641a8 587 /* Get the valid Page end Address */
mega64 0:bbe849f641a8 588 PageEndAddress = (uint32_t)((EEPROM_START_ADDRESS - 1) + (uint32_t)((ValidPage + 1) * PAGE_SIZE));
mega64 0:bbe849f641a8 589
mega64 0:bbe849f641a8 590 /* Check each active page address starting from begining */
mega64 0:bbe849f641a8 591 while (Address < PageEndAddress)
mega64 0:bbe849f641a8 592 {
mega64 0:bbe849f641a8 593 /* Verify if Address and Address+2 contents are 0xFFFFFFFF */
mega64 0:bbe849f641a8 594 if ((*(__IO uint32_t*)Address) == 0xFFFFFFFF)
mega64 0:bbe849f641a8 595 {
mega64 0:bbe849f641a8 596 /* Set variable data */
mega64 0:bbe849f641a8 597 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, Address, Data);
mega64 0:bbe849f641a8 598 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 599 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 600 {
mega64 0:bbe849f641a8 601 return FlashStatus;
mega64 0:bbe849f641a8 602 }
mega64 0:bbe849f641a8 603 /* Set variable virtual address */
mega64 0:bbe849f641a8 604 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, Address + 2, VirtAddress);
mega64 0:bbe849f641a8 605 /* Return program operation status */
mega64 0:bbe849f641a8 606 return FlashStatus;
mega64 0:bbe849f641a8 607 }
mega64 0:bbe849f641a8 608 else
mega64 0:bbe849f641a8 609 {
mega64 0:bbe849f641a8 610 /* Next address location */
mega64 0:bbe849f641a8 611 Address = Address + 4;
mega64 0:bbe849f641a8 612 }
mega64 0:bbe849f641a8 613 }
mega64 0:bbe849f641a8 614
mega64 0:bbe849f641a8 615 /* Return PAGE_FULL in case the valid page is full */
mega64 0:bbe849f641a8 616 return PAGE_FULL;
mega64 0:bbe849f641a8 617 }
mega64 0:bbe849f641a8 618
mega64 0:bbe849f641a8 619 /**
mega64 0:bbe849f641a8 620 * @brief Transfers last updated variables data from the full Page to
mega64 0:bbe849f641a8 621 * an empty one.
mega64 0:bbe849f641a8 622 * @param VirtAddress: 16 bit virtual address of the variable
mega64 0:bbe849f641a8 623 * @param Data: 16 bit data to be written as variable value
mega64 0:bbe849f641a8 624 * @retval Success or error status:
mega64 0:bbe849f641a8 625 * - FLASH_COMPLETE: on success
mega64 0:bbe849f641a8 626 * - PAGE_FULL: if valid page is full
mega64 0:bbe849f641a8 627 * - NO_VALID_PAGE: if no valid page was found
mega64 0:bbe849f641a8 628 * - Flash error code: on write Flash error
mega64 0:bbe849f641a8 629 */
mega64 0:bbe849f641a8 630 static uint16_t EE_PageTransfer(uint16_t VirtAddress, uint16_t Data)
mega64 0:bbe849f641a8 631 {
mega64 0:bbe849f641a8 632 HAL_StatusTypeDef FlashStatus = HAL_OK;
mega64 0:bbe849f641a8 633 uint32_t NewPageAddress = EEPROM_START_ADDRESS;
mega64 0:bbe849f641a8 634 uint16_t OldPageId=0;
mega64 0:bbe849f641a8 635 uint16_t ValidPage = PAGE0, VarIdx = 0;
mega64 0:bbe849f641a8 636 uint16_t EepromStatus = 0, ReadStatus = 0;
mega64 0:bbe849f641a8 637 uint32_t SectorError = 0;
mega64 0:bbe849f641a8 638 FLASH_EraseInitTypeDef pEraseInit;
mega64 0:bbe849f641a8 639
mega64 0:bbe849f641a8 640 /* Get active Page for read operation */
mega64 0:bbe849f641a8 641 ValidPage = EE_FindValidPage(READ_FROM_VALID_PAGE);
mega64 0:bbe849f641a8 642
mega64 0:bbe849f641a8 643 if (ValidPage == PAGE1) /* Page1 valid */
mega64 0:bbe849f641a8 644 {
mega64 0:bbe849f641a8 645 /* New page address where variable will be moved to */
mega64 0:bbe849f641a8 646 NewPageAddress = PAGE0_BASE_ADDRESS;
mega64 0:bbe849f641a8 647
mega64 0:bbe849f641a8 648 /* Old page ID where variable will be taken from */
mega64 0:bbe849f641a8 649 OldPageId = PAGE1_ID;
mega64 0:bbe849f641a8 650 }
mega64 0:bbe849f641a8 651 else if (ValidPage == PAGE0) /* Page0 valid */
mega64 0:bbe849f641a8 652 {
mega64 0:bbe849f641a8 653 /* New page address where variable will be moved to */
mega64 0:bbe849f641a8 654 NewPageAddress = PAGE1_BASE_ADDRESS;
mega64 0:bbe849f641a8 655
mega64 0:bbe849f641a8 656 /* Old page ID where variable will be taken from */
mega64 0:bbe849f641a8 657 OldPageId = PAGE0_ID;
mega64 0:bbe849f641a8 658 }
mega64 0:bbe849f641a8 659 else
mega64 0:bbe849f641a8 660 {
mega64 0:bbe849f641a8 661 return NO_VALID_PAGE; /* No valid Page */
mega64 0:bbe849f641a8 662 }
mega64 0:bbe849f641a8 663
mega64 0:bbe849f641a8 664 /* Set the new Page status to RECEIVE_DATA status */
mega64 0:bbe849f641a8 665 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, NewPageAddress, RECEIVE_DATA);
mega64 0:bbe849f641a8 666 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 667 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 668 {
mega64 0:bbe849f641a8 669 return FlashStatus;
mega64 0:bbe849f641a8 670 }
mega64 0:bbe849f641a8 671
mega64 0:bbe849f641a8 672 /* Write the variable passed as parameter in the new active page */
mega64 0:bbe849f641a8 673 EepromStatus = EE_VerifyPageFullWriteVariable(VirtAddress, Data);
mega64 0:bbe849f641a8 674 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 675 if (EepromStatus != HAL_OK)
mega64 0:bbe849f641a8 676 {
mega64 0:bbe849f641a8 677 return EepromStatus;
mega64 0:bbe849f641a8 678 }
mega64 0:bbe849f641a8 679
mega64 0:bbe849f641a8 680 /* Transfer process: transfer variables from old to the new active page */
mega64 0:bbe849f641a8 681 for (VarIdx = 0; VarIdx < NB_OF_VAR; VarIdx++)
mega64 0:bbe849f641a8 682 {
mega64 0:bbe849f641a8 683 if (VirtAddVarTab[VarIdx] != VirtAddress) /* Check each variable except the one passed as parameter */
mega64 0:bbe849f641a8 684 {
mega64 0:bbe849f641a8 685 /* Read the other last variable updates */
mega64 0:bbe849f641a8 686 ReadStatus = EE_ReadVariable(VirtAddVarTab[VarIdx], &DataVar);
mega64 0:bbe849f641a8 687 /* In case variable corresponding to the virtual address was found */
mega64 0:bbe849f641a8 688 if (ReadStatus != 0x1)
mega64 0:bbe849f641a8 689 {
mega64 0:bbe849f641a8 690 /* Transfer the variable to the new active page */
mega64 0:bbe849f641a8 691 EepromStatus = EE_VerifyPageFullWriteVariable(VirtAddVarTab[VarIdx], DataVar);
mega64 0:bbe849f641a8 692 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 693 if (EepromStatus != HAL_OK)
mega64 0:bbe849f641a8 694 {
mega64 0:bbe849f641a8 695 return EepromStatus;
mega64 0:bbe849f641a8 696 }
mega64 0:bbe849f641a8 697 }
mega64 0:bbe849f641a8 698 }
mega64 0:bbe849f641a8 699 }
mega64 0:bbe849f641a8 700
mega64 0:bbe849f641a8 701 pEraseInit.TypeErase = TYPEERASE_SECTORS;
mega64 0:bbe849f641a8 702 pEraseInit.Sector = OldPageId;
mega64 0:bbe849f641a8 703 pEraseInit.NbSectors = 1;
mega64 0:bbe849f641a8 704 pEraseInit.VoltageRange = VOLTAGE_RANGE;
mega64 0:bbe849f641a8 705
mega64 0:bbe849f641a8 706 /* Erase the old Page: Set old Page status to ERASED status */
mega64 0:bbe849f641a8 707 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:bbe849f641a8 708 /* If erase operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 709 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 710 {
mega64 0:bbe849f641a8 711 return FlashStatus;
mega64 0:bbe849f641a8 712 }
mega64 0:bbe849f641a8 713
mega64 0:bbe849f641a8 714 /* Set new Page status to VALID_PAGE status */
mega64 0:bbe849f641a8 715 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, NewPageAddress, VALID_PAGE);
mega64 0:bbe849f641a8 716 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 717 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 718 {
mega64 0:bbe849f641a8 719 return FlashStatus;
mega64 0:bbe849f641a8 720 }
mega64 0:bbe849f641a8 721
mega64 0:bbe849f641a8 722 /* Return last operation flash status */
mega64 0:bbe849f641a8 723 return FlashStatus;
mega64 0:bbe849f641a8 724 }
mega64 0:bbe849f641a8 725
mega64 0:bbe849f641a8 726 /**
mega64 0:bbe849f641a8 727 * @}
mega64 0:bbe849f641a8 728 */
mega64 0:bbe849f641a8 729
mega64 0:bbe849f641a8 730 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/