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/eeprom.cpp@2:3d16b28380a9, 2016-07-29 (annotated)

Committer:
mega64
Date:
Fri Jul 29 21:18:28 2016 +0000
Revision:
2:3d16b28380a9
Parent:
1:e91328f723ab
Child:
3:a51a1737b55d
Protect flash area of EEPROM simulation in case a larger code

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 2:3d16b28380a9 50 /* Dummy variable to protect eeprom pages if code size is bigger than 32kb (F401) */
mega64 2:3d16b28380a9 51 const uint8_t Eeprom_area[2 * PAGE_SIZE] __attribute__((at(EEPROM_START_ADDRESS),used))={ [0 ... (2 * PAGE_SIZE-1)] = 0xFF };
mega64 2:3d16b28380a9 52
mega64 2:3d16b28380a9 53
mega64 0:bbe849f641a8 54 /* Global variable used to store variable value in read sequence */
mega64 0:bbe849f641a8 55 uint16_t DataVar = 0;
mega64 0:bbe849f641a8 56
mega64 0:bbe849f641a8 57 /* Virtual address defined by the user: 0xFFFF value is prohibited */
mega64 0:bbe849f641a8 58 extern uint16_t VirtAddVarTab[NB_OF_VAR];
mega64 0:bbe849f641a8 59
mega64 0:bbe849f641a8 60 /* Private function prototypes -----------------------------------------------*/
mega64 0:bbe849f641a8 61 /* Private functions ---------------------------------------------------------*/
mega64 0:bbe849f641a8 62 static HAL_StatusTypeDef EE_Format(void);
mega64 0:bbe849f641a8 63 static uint16_t EE_FindValidPage(uint8_t Operation);
mega64 0:bbe849f641a8 64 static uint16_t EE_VerifyPageFullWriteVariable(uint16_t VirtAddress, uint16_t Data);
mega64 0:bbe849f641a8 65 static uint16_t EE_PageTransfer(uint16_t VirtAddress, uint16_t Data);
mega64 0:bbe849f641a8 66 static uint16_t EE_VerifyPageFullyErased(uint32_t Address);
mega64 0:bbe849f641a8 67
mega64 0:bbe849f641a8 68 /**
mega64 0:bbe849f641a8 69 * @brief Restore the pages to a known good state in case of page's status
mega64 0:bbe849f641a8 70 * corruption after a power loss.
mega64 0:bbe849f641a8 71 * @param None.
mega64 0:bbe849f641a8 72 * @retval - Flash error code: on write Flash error
mega64 0:bbe849f641a8 73 * - FLASH_COMPLETE: on success
mega64 0:bbe849f641a8 74 */
mega64 0:bbe849f641a8 75 uint16_t EE_Init(void)
mega64 0:bbe849f641a8 76 {
mega64 0:bbe849f641a8 77 uint16_t PageStatus0 = 6, PageStatus1 = 6;
mega64 0:bbe849f641a8 78 uint16_t VarIdx = 0;
mega64 0:bbe849f641a8 79 uint16_t EepromStatus = 0, ReadStatus = 0;
mega64 0:bbe849f641a8 80 int16_t x = -1;
mega64 0:bbe849f641a8 81 HAL_StatusTypeDef FlashStatus;
mega64 0:bbe849f641a8 82 uint32_t SectorError = 0;
mega64 0:bbe849f641a8 83 FLASH_EraseInitTypeDef pEraseInit;
mega64 0:bbe849f641a8 84
mega64 0:bbe849f641a8 85
mega64 0:bbe849f641a8 86 /* Get Page0 status */
mega64 0:bbe849f641a8 87 PageStatus0 = (*(__IO uint16_t*)PAGE0_BASE_ADDRESS);
mega64 0:bbe849f641a8 88 /* Get Page1 status */
mega64 0:bbe849f641a8 89 PageStatus1 = (*(__IO uint16_t*)PAGE1_BASE_ADDRESS);
mega64 0:bbe849f641a8 90
mega64 0:bbe849f641a8 91 pEraseInit.TypeErase = TYPEERASE_SECTORS;
mega64 0:bbe849f641a8 92 pEraseInit.Sector = PAGE0_ID;
mega64 0:bbe849f641a8 93 pEraseInit.NbSectors = 1;
mega64 0:bbe849f641a8 94 pEraseInit.VoltageRange = VOLTAGE_RANGE;
mega64 0:bbe849f641a8 95
mega64 0:bbe849f641a8 96 /* Check for invalid header states and repair if necessary */
mega64 0:bbe849f641a8 97 switch (PageStatus0)
mega64 0:bbe849f641a8 98 {
mega64 0:bbe849f641a8 99 case ERASED:
mega64 0:bbe849f641a8 100 if (PageStatus1 == VALID_PAGE) /* Page0 erased, Page1 valid */
mega64 0:bbe849f641a8 101 {
mega64 0:bbe849f641a8 102 /* Erase Page0 */
mega64 0:bbe849f641a8 103 if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
mega64 0:bbe849f641a8 104 {
mega64 0:bbe849f641a8 105 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:bbe849f641a8 106 /* If erase operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 107 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 108 {
mega64 0:bbe849f641a8 109 return FlashStatus;
mega64 0:bbe849f641a8 110 }
mega64 0:bbe849f641a8 111 }
mega64 0:bbe849f641a8 112 }
mega64 0:bbe849f641a8 113 else if (PageStatus1 == RECEIVE_DATA) /* Page0 erased, Page1 receive */
mega64 0:bbe849f641a8 114 {
mega64 0:bbe849f641a8 115 /* Erase Page0 */
mega64 0:bbe849f641a8 116 if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
mega64 0:bbe849f641a8 117 {
mega64 0:bbe849f641a8 118 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:bbe849f641a8 119 /* If erase operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 120 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 121 {
mega64 0:bbe849f641a8 122 return FlashStatus;
mega64 0:bbe849f641a8 123 }
mega64 0:bbe849f641a8 124 }
mega64 0:bbe849f641a8 125 /* Mark Page1 as valid */
mega64 0:bbe849f641a8 126 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, PAGE1_BASE_ADDRESS, VALID_PAGE);
mega64 0:bbe849f641a8 127 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 128 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 129 {
mega64 0:bbe849f641a8 130 return FlashStatus;
mega64 0:bbe849f641a8 131 }
mega64 0:bbe849f641a8 132 }
mega64 0:bbe849f641a8 133 else /* First EEPROM access (Page0&1 are erased) or invalid state -> format EEPROM */
mega64 0:bbe849f641a8 134 {
mega64 0:bbe849f641a8 135 /* Erase both Page0 and Page1 and set Page0 as valid page */
mega64 0:bbe849f641a8 136 FlashStatus = EE_Format();
mega64 0:bbe849f641a8 137 /* If erase/program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 138 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 139 {
mega64 0:bbe849f641a8 140 return FlashStatus;
mega64 0:bbe849f641a8 141 }
mega64 0:bbe849f641a8 142 }
mega64 0:bbe849f641a8 143 break;
mega64 0:bbe849f641a8 144
mega64 0:bbe849f641a8 145 case RECEIVE_DATA:
mega64 0:bbe849f641a8 146 if (PageStatus1 == VALID_PAGE) /* Page0 receive, Page1 valid */
mega64 0:bbe849f641a8 147 {
mega64 0:bbe849f641a8 148 /* Transfer data from Page1 to Page0 */
mega64 0:bbe849f641a8 149 for (VarIdx = 0; VarIdx < NB_OF_VAR; VarIdx++)
mega64 0:bbe849f641a8 150 {
mega64 0:bbe849f641a8 151 if (( *(__IO uint16_t*)(PAGE0_BASE_ADDRESS + 6)) == VirtAddVarTab[VarIdx])
mega64 0:bbe849f641a8 152 {
mega64 0:bbe849f641a8 153 x = VarIdx;
mega64 0:bbe849f641a8 154 }
mega64 0:bbe849f641a8 155 if (VarIdx != x)
mega64 0:bbe849f641a8 156 {
mega64 0:bbe849f641a8 157 /* Read the last variables' updates */
mega64 0:bbe849f641a8 158 ReadStatus = EE_ReadVariable(VirtAddVarTab[VarIdx], &DataVar);
mega64 0:bbe849f641a8 159 /* In case variable corresponding to the virtual address was found */
mega64 0:bbe849f641a8 160 if (ReadStatus != 0x1)
mega64 0:bbe849f641a8 161 {
mega64 0:bbe849f641a8 162 /* Transfer the variable to the Page0 */
mega64 0:bbe849f641a8 163 EepromStatus = EE_VerifyPageFullWriteVariable(VirtAddVarTab[VarIdx], DataVar);
mega64 0:bbe849f641a8 164 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 165 if (EepromStatus != HAL_OK)
mega64 0:bbe849f641a8 166 {
mega64 0:bbe849f641a8 167 return EepromStatus;
mega64 0:bbe849f641a8 168 }
mega64 0:bbe849f641a8 169 }
mega64 0:bbe849f641a8 170 }
mega64 0:bbe849f641a8 171 }
mega64 0:bbe849f641a8 172 /* Mark Page0 as valid */
mega64 0:bbe849f641a8 173 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, PAGE0_BASE_ADDRESS, VALID_PAGE);
mega64 0:bbe849f641a8 174 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 175 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 176 {
mega64 0:bbe849f641a8 177 return FlashStatus;
mega64 0:bbe849f641a8 178 }
mega64 0:bbe849f641a8 179 pEraseInit.Sector = PAGE1_ID;
mega64 0:bbe849f641a8 180 pEraseInit.NbSectors = 1;
mega64 0:bbe849f641a8 181 pEraseInit.VoltageRange = VOLTAGE_RANGE;
mega64 0:bbe849f641a8 182 /* Erase Page1 */
mega64 0:bbe849f641a8 183 if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
mega64 0:bbe849f641a8 184 {
mega64 0:bbe849f641a8 185 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:bbe849f641a8 186 /* If erase operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 187 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 188 {
mega64 0:bbe849f641a8 189 return FlashStatus;
mega64 0:bbe849f641a8 190 }
mega64 0:bbe849f641a8 191 }
mega64 0:bbe849f641a8 192 }
mega64 0:bbe849f641a8 193 else if (PageStatus1 == ERASED) /* Page0 receive, Page1 erased */
mega64 0:bbe849f641a8 194 {
mega64 0:bbe849f641a8 195 pEraseInit.Sector = PAGE1_ID;
mega64 0:bbe849f641a8 196 pEraseInit.NbSectors = 1;
mega64 0:bbe849f641a8 197 pEraseInit.VoltageRange = VOLTAGE_RANGE;
mega64 0:bbe849f641a8 198 /* Erase Page1 */
mega64 0:bbe849f641a8 199 if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
mega64 0:bbe849f641a8 200 {
mega64 0:bbe849f641a8 201 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:bbe849f641a8 202 /* If erase operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 203 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 204 {
mega64 0:bbe849f641a8 205 return FlashStatus;
mega64 0:bbe849f641a8 206 }
mega64 0:bbe849f641a8 207 }
mega64 0:bbe849f641a8 208 /* Mark Page0 as valid */
mega64 0:bbe849f641a8 209 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, PAGE0_BASE_ADDRESS, VALID_PAGE);
mega64 0:bbe849f641a8 210 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 211 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 212 {
mega64 0:bbe849f641a8 213 return FlashStatus;
mega64 0:bbe849f641a8 214 }
mega64 0:bbe849f641a8 215 }
mega64 0:bbe849f641a8 216 else /* Invalid state -> format eeprom */
mega64 0:bbe849f641a8 217 {
mega64 0:bbe849f641a8 218 /* Erase both Page0 and Page1 and set Page0 as valid page */
mega64 0:bbe849f641a8 219 FlashStatus = EE_Format();
mega64 0:bbe849f641a8 220 /* If erase/program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 221 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 222 {
mega64 0:bbe849f641a8 223 return FlashStatus;
mega64 0:bbe849f641a8 224 }
mega64 0:bbe849f641a8 225 }
mega64 0:bbe849f641a8 226 break;
mega64 0:bbe849f641a8 227
mega64 0:bbe849f641a8 228 case VALID_PAGE:
mega64 0:bbe849f641a8 229 if (PageStatus1 == VALID_PAGE) /* Invalid state -> format eeprom */
mega64 0:bbe849f641a8 230 {
mega64 0:bbe849f641a8 231 /* Erase both Page0 and Page1 and set Page0 as valid page */
mega64 0:bbe849f641a8 232 FlashStatus = EE_Format();
mega64 0:bbe849f641a8 233 /* If erase/program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 234 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 235 {
mega64 0:bbe849f641a8 236 return FlashStatus;
mega64 0:bbe849f641a8 237 }
mega64 0:bbe849f641a8 238 }
mega64 0:bbe849f641a8 239 else if (PageStatus1 == ERASED) /* Page0 valid, Page1 erased */
mega64 0:bbe849f641a8 240 {
mega64 0:bbe849f641a8 241 pEraseInit.Sector = PAGE1_ID;
mega64 0:bbe849f641a8 242 pEraseInit.NbSectors = 1;
mega64 0:bbe849f641a8 243 pEraseInit.VoltageRange = VOLTAGE_RANGE;
mega64 0:bbe849f641a8 244 /* Erase Page1 */
mega64 0:bbe849f641a8 245 if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
mega64 0:bbe849f641a8 246 {
mega64 0:bbe849f641a8 247 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:bbe849f641a8 248 /* If erase operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 249 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 250 {
mega64 0:bbe849f641a8 251 return FlashStatus;
mega64 0:bbe849f641a8 252 }
mega64 0:bbe849f641a8 253 }
mega64 0:bbe849f641a8 254 }
mega64 0:bbe849f641a8 255 else /* Page0 valid, Page1 receive */
mega64 0:bbe849f641a8 256 {
mega64 0:bbe849f641a8 257 /* Transfer data from Page0 to Page1 */
mega64 0:bbe849f641a8 258 for (VarIdx = 0; VarIdx < NB_OF_VAR; VarIdx++)
mega64 0:bbe849f641a8 259 {
mega64 0:bbe849f641a8 260 if ((*(__IO uint16_t*)(PAGE1_BASE_ADDRESS + 6)) == VirtAddVarTab[VarIdx])
mega64 0:bbe849f641a8 261 {
mega64 0:bbe849f641a8 262 x = VarIdx;
mega64 0:bbe849f641a8 263 }
mega64 0:bbe849f641a8 264 if (VarIdx != x)
mega64 0:bbe849f641a8 265 {
mega64 0:bbe849f641a8 266 /* Read the last variables' updates */
mega64 0:bbe849f641a8 267 ReadStatus = EE_ReadVariable(VirtAddVarTab[VarIdx], &DataVar);
mega64 0:bbe849f641a8 268 /* In case variable corresponding to the virtual address was found */
mega64 0:bbe849f641a8 269 if (ReadStatus != 0x1)
mega64 0:bbe849f641a8 270 {
mega64 0:bbe849f641a8 271 /* Transfer the variable to the Page1 */
mega64 0:bbe849f641a8 272 EepromStatus = EE_VerifyPageFullWriteVariable(VirtAddVarTab[VarIdx], DataVar);
mega64 0:bbe849f641a8 273 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 274 if (EepromStatus != HAL_OK)
mega64 0:bbe849f641a8 275 {
mega64 0:bbe849f641a8 276 return EepromStatus;
mega64 0:bbe849f641a8 277 }
mega64 0:bbe849f641a8 278 }
mega64 0:bbe849f641a8 279 }
mega64 0:bbe849f641a8 280 }
mega64 0:bbe849f641a8 281 /* Mark Page1 as valid */
mega64 0:bbe849f641a8 282 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, PAGE1_BASE_ADDRESS, VALID_PAGE);
mega64 0:bbe849f641a8 283 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 284 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 285 {
mega64 0:bbe849f641a8 286 return FlashStatus;
mega64 0:bbe849f641a8 287 }
mega64 0:bbe849f641a8 288 pEraseInit.Sector = PAGE0_ID;
mega64 0:bbe849f641a8 289 pEraseInit.NbSectors = 1;
mega64 0:bbe849f641a8 290 pEraseInit.VoltageRange = VOLTAGE_RANGE;
mega64 0:bbe849f641a8 291 /* Erase Page0 */
mega64 0:bbe849f641a8 292 if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
mega64 0:bbe849f641a8 293 {
mega64 0:bbe849f641a8 294 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:bbe849f641a8 295 /* If erase operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 296 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 297 {
mega64 0:bbe849f641a8 298 return FlashStatus;
mega64 0:bbe849f641a8 299 }
mega64 0:bbe849f641a8 300 }
mega64 0:bbe849f641a8 301 }
mega64 0:bbe849f641a8 302 break;
mega64 0:bbe849f641a8 303
mega64 0:bbe849f641a8 304 default: /* Any other state -> format eeprom */
mega64 0:bbe849f641a8 305 /* Erase both Page0 and Page1 and set Page0 as valid page */
mega64 0:bbe849f641a8 306 FlashStatus = EE_Format();
mega64 0:bbe849f641a8 307 /* If erase/program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 308 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 309 {
mega64 0:bbe849f641a8 310 return FlashStatus;
mega64 0:bbe849f641a8 311 }
mega64 0:bbe849f641a8 312 break;
mega64 0:bbe849f641a8 313 }
mega64 0:bbe849f641a8 314
mega64 0:bbe849f641a8 315 return HAL_OK;
mega64 0:bbe849f641a8 316 }
mega64 0:bbe849f641a8 317
mega64 0:bbe849f641a8 318 /**
mega64 0:bbe849f641a8 319 * @brief Verify if specified page is fully erased.
mega64 0:bbe849f641a8 320 * @param Address: page address
mega64 0:bbe849f641a8 321 * This parameter can be one of the following values:
mega64 0:bbe849f641a8 322 * @arg PAGE0_BASE_ADDRESS: Page0 base address
mega64 0:bbe849f641a8 323 * @arg PAGE1_BASE_ADDRESS: Page1 base address
mega64 0:bbe849f641a8 324 * @retval page fully erased status:
mega64 0:bbe849f641a8 325 * - 0: if Page not erased
mega64 0:bbe849f641a8 326 * - 1: if Page erased
mega64 0:bbe849f641a8 327 */
mega64 0:bbe849f641a8 328 uint16_t EE_VerifyPageFullyErased(uint32_t Address)
mega64 0:bbe849f641a8 329 {
mega64 0:bbe849f641a8 330 uint32_t ReadStatus = 1;
mega64 0:bbe849f641a8 331 uint16_t AddressValue = 0x5555;
mega64 0:bbe849f641a8 332
mega64 0:bbe849f641a8 333 /* Check each active page address starting from end */
mega64 0:bbe849f641a8 334 while (Address <= PAGE0_END_ADDRESS)
mega64 0:bbe849f641a8 335 {
mega64 0:bbe849f641a8 336 /* Get the current location content to be compared with virtual address */
mega64 0:bbe849f641a8 337 AddressValue = (*(__IO uint16_t*)Address);
mega64 0:bbe849f641a8 338
mega64 0:bbe849f641a8 339 /* Compare the read address with the virtual address */
mega64 0:bbe849f641a8 340 if (AddressValue != ERASED)
mega64 0:bbe849f641a8 341 {
mega64 0:bbe849f641a8 342
mega64 0:bbe849f641a8 343 /* In case variable value is read, reset ReadStatus flag */
mega64 0:bbe849f641a8 344 ReadStatus = 0;
mega64 0:bbe849f641a8 345
mega64 0:bbe849f641a8 346 break;
mega64 0:bbe849f641a8 347 }
mega64 0:bbe849f641a8 348 /* Next address location */
mega64 0:bbe849f641a8 349 Address = Address + 4;
mega64 0:bbe849f641a8 350 }
mega64 0:bbe849f641a8 351
mega64 0:bbe849f641a8 352 /* Return ReadStatus value: (0: Page not erased, 1: Sector erased) */
mega64 0:bbe849f641a8 353 return ReadStatus;
mega64 0:bbe849f641a8 354 }
mega64 0:bbe849f641a8 355
mega64 0:bbe849f641a8 356 /**
mega64 0:bbe849f641a8 357 * @brief Returns the last stored variable data, if found, which correspond to
mega64 0:bbe849f641a8 358 * the passed virtual address
mega64 0:bbe849f641a8 359 * @param VirtAddress: Variable virtual address
mega64 0:bbe849f641a8 360 * @param Data: Global variable contains the read variable value
mega64 0:bbe849f641a8 361 * @retval Success or error status:
mega64 0:bbe849f641a8 362 * - 0: if variable was found
mega64 0:bbe849f641a8 363 * - 1: if the variable was not found
mega64 0:bbe849f641a8 364 * - NO_VALID_PAGE: if no valid page was found.
mega64 0:bbe849f641a8 365 */
mega64 0:bbe849f641a8 366 uint16_t EE_ReadVariable(uint16_t VirtAddress, uint16_t* Data)
mega64 0:bbe849f641a8 367 {
mega64 0:bbe849f641a8 368 uint16_t ValidPage = PAGE0;
mega64 0:bbe849f641a8 369 uint16_t AddressValue = 0x5555, ReadStatus = 1;
mega64 0:bbe849f641a8 370 uint32_t Address = EEPROM_START_ADDRESS, PageStartAddress = EEPROM_START_ADDRESS;
mega64 0:bbe849f641a8 371
mega64 0:bbe849f641a8 372 /* Get active Page for read operation */
mega64 0:bbe849f641a8 373 ValidPage = EE_FindValidPage(READ_FROM_VALID_PAGE);
mega64 0:bbe849f641a8 374
mega64 0:bbe849f641a8 375 /* Check if there is no valid page */
mega64 0:bbe849f641a8 376 if (ValidPage == NO_VALID_PAGE)
mega64 0:bbe849f641a8 377 {
mega64 0:bbe849f641a8 378 return NO_VALID_PAGE;
mega64 0:bbe849f641a8 379 }
mega64 0:bbe849f641a8 380
mega64 0:bbe849f641a8 381 /* Get the valid Page start Address */
mega64 0:bbe849f641a8 382 PageStartAddress = (uint32_t)(EEPROM_START_ADDRESS + (uint32_t)(ValidPage * PAGE_SIZE));
mega64 0:bbe849f641a8 383
mega64 0:bbe849f641a8 384 /* Get the valid Page end Address */
mega64 0:bbe849f641a8 385 Address = (uint32_t)((EEPROM_START_ADDRESS - 2) + (uint32_t)((1 + ValidPage) * PAGE_SIZE));
mega64 0:bbe849f641a8 386
mega64 0:bbe849f641a8 387 /* Check each active page address starting from end */
mega64 0:bbe849f641a8 388 while (Address > (PageStartAddress + 2))
mega64 0:bbe849f641a8 389 {
mega64 0:bbe849f641a8 390 /* Get the current location content to be compared with virtual address */
mega64 0:bbe849f641a8 391 AddressValue = (*(__IO uint16_t*)Address);
mega64 0:bbe849f641a8 392
mega64 0:bbe849f641a8 393 /* Compare the read address with the virtual address */
mega64 0:bbe849f641a8 394 if (AddressValue == VirtAddress)
mega64 0:bbe849f641a8 395 {
mega64 0:bbe849f641a8 396 /* Get content of Address-2 which is variable value */
mega64 0:bbe849f641a8 397 *Data = (*(__IO uint16_t*)(Address - 2));
mega64 0:bbe849f641a8 398
mega64 0:bbe849f641a8 399 /* In case variable value is read, reset ReadStatus flag */
mega64 0:bbe849f641a8 400 ReadStatus = 0;
mega64 0:bbe849f641a8 401
mega64 0:bbe849f641a8 402 break;
mega64 0:bbe849f641a8 403 }
mega64 0:bbe849f641a8 404 else
mega64 0:bbe849f641a8 405 {
mega64 0:bbe849f641a8 406 /* Next address location */
mega64 0:bbe849f641a8 407 Address = Address - 4;
mega64 0:bbe849f641a8 408 }
mega64 0:bbe849f641a8 409 }
mega64 0:bbe849f641a8 410
mega64 0:bbe849f641a8 411 /* Return ReadStatus value: (0: variable exist, 1: variable doesn't exist) */
mega64 0:bbe849f641a8 412 return ReadStatus;
mega64 0:bbe849f641a8 413 }
mega64 0:bbe849f641a8 414
mega64 0:bbe849f641a8 415 /**
mega64 0:bbe849f641a8 416 * @brief Writes/upadtes variable data in EEPROM.
mega64 0:bbe849f641a8 417 * @param VirtAddress: Variable virtual address
mega64 0:bbe849f641a8 418 * @param Data: 16 bit data to be written
mega64 0:bbe849f641a8 419 * @retval Success or error status:
mega64 0:bbe849f641a8 420 * - FLASH_COMPLETE: on success
mega64 0:bbe849f641a8 421 * - PAGE_FULL: if valid page is full
mega64 0:bbe849f641a8 422 * - NO_VALID_PAGE: if no valid page was found
mega64 0:bbe849f641a8 423 * - Flash error code: on write Flash error
mega64 0:bbe849f641a8 424 */
mega64 0:bbe849f641a8 425 uint16_t EE_WriteVariable(uint16_t VirtAddress, uint16_t Data)
mega64 0:bbe849f641a8 426 {
mega64 0:bbe849f641a8 427 uint16_t Status = 0;
mega64 0:bbe849f641a8 428
mega64 0:bbe849f641a8 429 /* Write the variable virtual address and value in the EEPROM */
mega64 0:bbe849f641a8 430 Status = EE_VerifyPageFullWriteVariable(VirtAddress, Data);
mega64 0:bbe849f641a8 431
mega64 0:bbe849f641a8 432 /* In case the EEPROM active page is full */
mega64 0:bbe849f641a8 433 if (Status == PAGE_FULL)
mega64 0:bbe849f641a8 434 {
mega64 0:bbe849f641a8 435 /* Perform Page transfer */
mega64 0:bbe849f641a8 436 Status = EE_PageTransfer(VirtAddress, Data);
mega64 0:bbe849f641a8 437 }
mega64 0:bbe849f641a8 438
mega64 0:bbe849f641a8 439 /* Return last operation status */
mega64 0:bbe849f641a8 440 return Status;
mega64 0:bbe849f641a8 441 }
mega64 0:bbe849f641a8 442
mega64 0:bbe849f641a8 443 /**
mega64 0:bbe849f641a8 444 * @brief Erases PAGE and PAGE1 and writes VALID_PAGE header to PAGE
mega64 0:bbe849f641a8 445 * @param None
mega64 0:bbe849f641a8 446 * @retval Status of the last operation (Flash write or erase) done during
mega64 0:bbe849f641a8 447 * EEPROM formating
mega64 0:bbe849f641a8 448 */
mega64 0:bbe849f641a8 449 static HAL_StatusTypeDef EE_Format(void)
mega64 0:bbe849f641a8 450 {
mega64 0:bbe849f641a8 451 HAL_StatusTypeDef FlashStatus = HAL_OK;
mega64 0:bbe849f641a8 452 uint32_t SectorError = 0;
mega64 0:bbe849f641a8 453 FLASH_EraseInitTypeDef pEraseInit;
mega64 0:bbe849f641a8 454
mega64 0:bbe849f641a8 455 pEraseInit.TypeErase = FLASH_TYPEERASE_SECTORS;
mega64 0:bbe849f641a8 456 pEraseInit.Sector = PAGE0_ID;
mega64 0:bbe849f641a8 457 pEraseInit.NbSectors = 1;
mega64 0:bbe849f641a8 458 pEraseInit.VoltageRange = VOLTAGE_RANGE;
mega64 0:bbe849f641a8 459 /* Erase Page0 */
mega64 0:bbe849f641a8 460 if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
mega64 0:bbe849f641a8 461 {
mega64 0:bbe849f641a8 462 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:bbe849f641a8 463 /* If erase operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 464 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 465 {
mega64 0:bbe849f641a8 466 return FlashStatus;
mega64 0:bbe849f641a8 467 }
mega64 0:bbe849f641a8 468 }
mega64 0:bbe849f641a8 469 /* Set Page0 as valid page: Write VALID_PAGE at Page0 base address */
mega64 0:bbe849f641a8 470 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, PAGE0_BASE_ADDRESS, VALID_PAGE);
mega64 0:bbe849f641a8 471 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 472 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 473 {
mega64 0:bbe849f641a8 474 return FlashStatus;
mega64 0:bbe849f641a8 475 }
mega64 0:bbe849f641a8 476
mega64 0:bbe849f641a8 477 pEraseInit.Sector = PAGE1_ID;
mega64 0:bbe849f641a8 478 /* Erase Page1 */
mega64 0:bbe849f641a8 479 if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
mega64 0:bbe849f641a8 480 {
mega64 0:bbe849f641a8 481 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:bbe849f641a8 482 /* If erase operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 483 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 484 {
mega64 0:bbe849f641a8 485 return FlashStatus;
mega64 0:bbe849f641a8 486 }
mega64 0:bbe849f641a8 487 }
mega64 0:bbe849f641a8 488
mega64 0:bbe849f641a8 489 return HAL_OK;
mega64 0:bbe849f641a8 490 }
mega64 0:bbe849f641a8 491
mega64 0:bbe849f641a8 492 /**
mega64 0:bbe849f641a8 493 * @brief Find valid Page for write or read operation
mega64 0:bbe849f641a8 494 * @param Operation: operation to achieve on the valid page.
mega64 0:bbe849f641a8 495 * This parameter can be one of the following values:
mega64 0:bbe849f641a8 496 * @arg READ_FROM_VALID_PAGE: read operation from valid page
mega64 0:bbe849f641a8 497 * @arg WRITE_IN_VALID_PAGE: write operation from valid page
mega64 0:bbe849f641a8 498 * @retval Valid page number (PAGE or PAGE1) or NO_VALID_PAGE in case
mega64 0:bbe849f641a8 499 * of no valid page was found
mega64 0:bbe849f641a8 500 */
mega64 0:bbe849f641a8 501 static uint16_t EE_FindValidPage(uint8_t Operation)
mega64 0:bbe849f641a8 502 {
mega64 0:bbe849f641a8 503 uint16_t PageStatus0 = 6, PageStatus1 = 6;
mega64 0:bbe849f641a8 504
mega64 0:bbe849f641a8 505 /* Get Page0 actual status */
mega64 0:bbe849f641a8 506 PageStatus0 = (*(__IO uint16_t*)PAGE0_BASE_ADDRESS);
mega64 0:bbe849f641a8 507
mega64 0:bbe849f641a8 508 /* Get Page1 actual status */
mega64 0:bbe849f641a8 509 PageStatus1 = (*(__IO uint16_t*)PAGE1_BASE_ADDRESS);
mega64 0:bbe849f641a8 510
mega64 0:bbe849f641a8 511 /* Write or read operation */
mega64 0:bbe849f641a8 512 switch (Operation)
mega64 0:bbe849f641a8 513 {
mega64 0:bbe849f641a8 514 case WRITE_IN_VALID_PAGE: /* ---- Write operation ---- */
mega64 0:bbe849f641a8 515 if (PageStatus1 == VALID_PAGE)
mega64 0:bbe849f641a8 516 {
mega64 0:bbe849f641a8 517 /* Page0 receiving data */
mega64 0:bbe849f641a8 518 if (PageStatus0 == RECEIVE_DATA)
mega64 0:bbe849f641a8 519 {
mega64 0:bbe849f641a8 520 return PAGE0; /* Page0 valid */
mega64 0:bbe849f641a8 521 }
mega64 0:bbe849f641a8 522 else
mega64 0:bbe849f641a8 523 {
mega64 0:bbe849f641a8 524 return PAGE1; /* Page1 valid */
mega64 0:bbe849f641a8 525 }
mega64 0:bbe849f641a8 526 }
mega64 0:bbe849f641a8 527 else if (PageStatus0 == VALID_PAGE)
mega64 0:bbe849f641a8 528 {
mega64 0:bbe849f641a8 529 /* Page1 receiving data */
mega64 0:bbe849f641a8 530 if (PageStatus1 == RECEIVE_DATA)
mega64 0:bbe849f641a8 531 {
mega64 0:bbe849f641a8 532 return PAGE1; /* Page1 valid */
mega64 0:bbe849f641a8 533 }
mega64 0:bbe849f641a8 534 else
mega64 0:bbe849f641a8 535 {
mega64 0:bbe849f641a8 536 return PAGE0; /* Page0 valid */
mega64 0:bbe849f641a8 537 }
mega64 0:bbe849f641a8 538 }
mega64 0:bbe849f641a8 539 else
mega64 0:bbe849f641a8 540 {
mega64 0:bbe849f641a8 541 return NO_VALID_PAGE; /* No valid Page */
mega64 0:bbe849f641a8 542 }
mega64 0:bbe849f641a8 543
mega64 0:bbe849f641a8 544 case READ_FROM_VALID_PAGE: /* ---- Read operation ---- */
mega64 0:bbe849f641a8 545 if (PageStatus0 == VALID_PAGE)
mega64 0:bbe849f641a8 546 {
mega64 0:bbe849f641a8 547 return PAGE0; /* Page0 valid */
mega64 0:bbe849f641a8 548 }
mega64 0:bbe849f641a8 549 else if (PageStatus1 == VALID_PAGE)
mega64 0:bbe849f641a8 550 {
mega64 0:bbe849f641a8 551 return PAGE1; /* Page1 valid */
mega64 0:bbe849f641a8 552 }
mega64 0:bbe849f641a8 553 else
mega64 0:bbe849f641a8 554 {
mega64 0:bbe849f641a8 555 return NO_VALID_PAGE ; /* No valid Page */
mega64 0:bbe849f641a8 556 }
mega64 0:bbe849f641a8 557
mega64 0:bbe849f641a8 558 default:
mega64 0:bbe849f641a8 559 return PAGE0; /* Page0 valid */
mega64 0:bbe849f641a8 560 }
mega64 0:bbe849f641a8 561 }
mega64 0:bbe849f641a8 562
mega64 0:bbe849f641a8 563 /**
mega64 0:bbe849f641a8 564 * @brief Verify if active page is full and Writes variable in EEPROM.
mega64 0:bbe849f641a8 565 * @param VirtAddress: 16 bit virtual address of the variable
mega64 0:bbe849f641a8 566 * @param Data: 16 bit data to be written as variable value
mega64 0:bbe849f641a8 567 * @retval Success or error status:
mega64 0:bbe849f641a8 568 * - FLASH_COMPLETE: on success
mega64 0:bbe849f641a8 569 * - PAGE_FULL: if valid page is full
mega64 0:bbe849f641a8 570 * - NO_VALID_PAGE: if no valid page was found
mega64 0:bbe849f641a8 571 * - Flash error code: on write Flash error
mega64 0:bbe849f641a8 572 */
mega64 0:bbe849f641a8 573 static uint16_t EE_VerifyPageFullWriteVariable(uint16_t VirtAddress, uint16_t Data)
mega64 0:bbe849f641a8 574 {
mega64 0:bbe849f641a8 575 HAL_StatusTypeDef FlashStatus = HAL_OK;
mega64 0:bbe849f641a8 576 uint16_t ValidPage = PAGE0;
mega64 0:bbe849f641a8 577 uint32_t Address = EEPROM_START_ADDRESS, PageEndAddress = EEPROM_START_ADDRESS+PAGE_SIZE;
mega64 0:bbe849f641a8 578
mega64 0:bbe849f641a8 579 /* Get valid Page for write operation */
mega64 0:bbe849f641a8 580 ValidPage = EE_FindValidPage(WRITE_IN_VALID_PAGE);
mega64 0:bbe849f641a8 581
mega64 0:bbe849f641a8 582 /* Check if there is no valid page */
mega64 0:bbe849f641a8 583 if (ValidPage == NO_VALID_PAGE)
mega64 0:bbe849f641a8 584 {
mega64 0:bbe849f641a8 585 return NO_VALID_PAGE;
mega64 0:bbe849f641a8 586 }
mega64 0:bbe849f641a8 587
mega64 0:bbe849f641a8 588 /* Get the valid Page start Address */
mega64 0:bbe849f641a8 589 Address = (uint32_t)(EEPROM_START_ADDRESS + (uint32_t)(ValidPage * PAGE_SIZE));
mega64 0:bbe849f641a8 590
mega64 0:bbe849f641a8 591 /* Get the valid Page end Address */
mega64 0:bbe849f641a8 592 PageEndAddress = (uint32_t)((EEPROM_START_ADDRESS - 1) + (uint32_t)((ValidPage + 1) * PAGE_SIZE));
mega64 0:bbe849f641a8 593
mega64 0:bbe849f641a8 594 /* Check each active page address starting from begining */
mega64 0:bbe849f641a8 595 while (Address < PageEndAddress)
mega64 0:bbe849f641a8 596 {
mega64 0:bbe849f641a8 597 /* Verify if Address and Address+2 contents are 0xFFFFFFFF */
mega64 0:bbe849f641a8 598 if ((*(__IO uint32_t*)Address) == 0xFFFFFFFF)
mega64 0:bbe849f641a8 599 {
mega64 0:bbe849f641a8 600 /* Set variable data */
mega64 0:bbe849f641a8 601 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, Address, Data);
mega64 0:bbe849f641a8 602 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 603 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 604 {
mega64 0:bbe849f641a8 605 return FlashStatus;
mega64 0:bbe849f641a8 606 }
mega64 0:bbe849f641a8 607 /* Set variable virtual address */
mega64 0:bbe849f641a8 608 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, Address + 2, VirtAddress);
mega64 0:bbe849f641a8 609 /* Return program operation status */
mega64 0:bbe849f641a8 610 return FlashStatus;
mega64 0:bbe849f641a8 611 }
mega64 0:bbe849f641a8 612 else
mega64 0:bbe849f641a8 613 {
mega64 0:bbe849f641a8 614 /* Next address location */
mega64 0:bbe849f641a8 615 Address = Address + 4;
mega64 0:bbe849f641a8 616 }
mega64 0:bbe849f641a8 617 }
mega64 0:bbe849f641a8 618
mega64 0:bbe849f641a8 619 /* Return PAGE_FULL in case the valid page is full */
mega64 0:bbe849f641a8 620 return PAGE_FULL;
mega64 0:bbe849f641a8 621 }
mega64 0:bbe849f641a8 622
mega64 0:bbe849f641a8 623 /**
mega64 0:bbe849f641a8 624 * @brief Transfers last updated variables data from the full Page to
mega64 0:bbe849f641a8 625 * an empty one.
mega64 0:bbe849f641a8 626 * @param VirtAddress: 16 bit virtual address of the variable
mega64 0:bbe849f641a8 627 * @param Data: 16 bit data to be written as variable value
mega64 0:bbe849f641a8 628 * @retval Success or error status:
mega64 0:bbe849f641a8 629 * - FLASH_COMPLETE: on success
mega64 0:bbe849f641a8 630 * - PAGE_FULL: if valid page is full
mega64 0:bbe849f641a8 631 * - NO_VALID_PAGE: if no valid page was found
mega64 0:bbe849f641a8 632 * - Flash error code: on write Flash error
mega64 0:bbe849f641a8 633 */
mega64 0:bbe849f641a8 634 static uint16_t EE_PageTransfer(uint16_t VirtAddress, uint16_t Data)
mega64 0:bbe849f641a8 635 {
mega64 0:bbe849f641a8 636 HAL_StatusTypeDef FlashStatus = HAL_OK;
mega64 0:bbe849f641a8 637 uint32_t NewPageAddress = EEPROM_START_ADDRESS;
mega64 0:bbe849f641a8 638 uint16_t OldPageId=0;
mega64 0:bbe849f641a8 639 uint16_t ValidPage = PAGE0, VarIdx = 0;
mega64 0:bbe849f641a8 640 uint16_t EepromStatus = 0, ReadStatus = 0;
mega64 0:bbe849f641a8 641 uint32_t SectorError = 0;
mega64 0:bbe849f641a8 642 FLASH_EraseInitTypeDef pEraseInit;
mega64 0:bbe849f641a8 643
mega64 0:bbe849f641a8 644 /* Get active Page for read operation */
mega64 0:bbe849f641a8 645 ValidPage = EE_FindValidPage(READ_FROM_VALID_PAGE);
mega64 0:bbe849f641a8 646
mega64 0:bbe849f641a8 647 if (ValidPage == PAGE1) /* Page1 valid */
mega64 0:bbe849f641a8 648 {
mega64 0:bbe849f641a8 649 /* New page address where variable will be moved to */
mega64 0:bbe849f641a8 650 NewPageAddress = PAGE0_BASE_ADDRESS;
mega64 0:bbe849f641a8 651
mega64 0:bbe849f641a8 652 /* Old page ID where variable will be taken from */
mega64 0:bbe849f641a8 653 OldPageId = PAGE1_ID;
mega64 0:bbe849f641a8 654 }
mega64 0:bbe849f641a8 655 else if (ValidPage == PAGE0) /* Page0 valid */
mega64 0:bbe849f641a8 656 {
mega64 0:bbe849f641a8 657 /* New page address where variable will be moved to */
mega64 0:bbe849f641a8 658 NewPageAddress = PAGE1_BASE_ADDRESS;
mega64 0:bbe849f641a8 659
mega64 0:bbe849f641a8 660 /* Old page ID where variable will be taken from */
mega64 0:bbe849f641a8 661 OldPageId = PAGE0_ID;
mega64 0:bbe849f641a8 662 }
mega64 0:bbe849f641a8 663 else
mega64 0:bbe849f641a8 664 {
mega64 0:bbe849f641a8 665 return NO_VALID_PAGE; /* No valid Page */
mega64 0:bbe849f641a8 666 }
mega64 0:bbe849f641a8 667
mega64 0:bbe849f641a8 668 /* Set the new Page status to RECEIVE_DATA status */
mega64 0:bbe849f641a8 669 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, NewPageAddress, RECEIVE_DATA);
mega64 0:bbe849f641a8 670 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 671 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 672 {
mega64 0:bbe849f641a8 673 return FlashStatus;
mega64 0:bbe849f641a8 674 }
mega64 0:bbe849f641a8 675
mega64 0:bbe849f641a8 676 /* Write the variable passed as parameter in the new active page */
mega64 0:bbe849f641a8 677 EepromStatus = EE_VerifyPageFullWriteVariable(VirtAddress, Data);
mega64 0:bbe849f641a8 678 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 679 if (EepromStatus != HAL_OK)
mega64 0:bbe849f641a8 680 {
mega64 0:bbe849f641a8 681 return EepromStatus;
mega64 0:bbe849f641a8 682 }
mega64 0:bbe849f641a8 683
mega64 0:bbe849f641a8 684 /* Transfer process: transfer variables from old to the new active page */
mega64 0:bbe849f641a8 685 for (VarIdx = 0; VarIdx < NB_OF_VAR; VarIdx++)
mega64 0:bbe849f641a8 686 {
mega64 0:bbe849f641a8 687 if (VirtAddVarTab[VarIdx] != VirtAddress) /* Check each variable except the one passed as parameter */
mega64 0:bbe849f641a8 688 {
mega64 0:bbe849f641a8 689 /* Read the other last variable updates */
mega64 0:bbe849f641a8 690 ReadStatus = EE_ReadVariable(VirtAddVarTab[VarIdx], &DataVar);
mega64 0:bbe849f641a8 691 /* In case variable corresponding to the virtual address was found */
mega64 0:bbe849f641a8 692 if (ReadStatus != 0x1)
mega64 0:bbe849f641a8 693 {
mega64 0:bbe849f641a8 694 /* Transfer the variable to the new active page */
mega64 0:bbe849f641a8 695 EepromStatus = EE_VerifyPageFullWriteVariable(VirtAddVarTab[VarIdx], DataVar);
mega64 0:bbe849f641a8 696 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 697 if (EepromStatus != HAL_OK)
mega64 0:bbe849f641a8 698 {
mega64 0:bbe849f641a8 699 return EepromStatus;
mega64 0:bbe849f641a8 700 }
mega64 0:bbe849f641a8 701 }
mega64 0:bbe849f641a8 702 }
mega64 0:bbe849f641a8 703 }
mega64 0:bbe849f641a8 704
mega64 0:bbe849f641a8 705 pEraseInit.TypeErase = TYPEERASE_SECTORS;
mega64 0:bbe849f641a8 706 pEraseInit.Sector = OldPageId;
mega64 0:bbe849f641a8 707 pEraseInit.NbSectors = 1;
mega64 0:bbe849f641a8 708 pEraseInit.VoltageRange = VOLTAGE_RANGE;
mega64 0:bbe849f641a8 709
mega64 0:bbe849f641a8 710 /* Erase the old Page: Set old Page status to ERASED status */
mega64 0:bbe849f641a8 711 FlashStatus = HAL_FLASHEx_Erase(&pEraseInit, &SectorError);
mega64 0:bbe849f641a8 712 /* If erase operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 713 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 714 {
mega64 0:bbe849f641a8 715 return FlashStatus;
mega64 0:bbe849f641a8 716 }
mega64 0:bbe849f641a8 717
mega64 0:bbe849f641a8 718 /* Set new Page status to VALID_PAGE status */
mega64 0:bbe849f641a8 719 FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_HALFWORD, NewPageAddress, VALID_PAGE);
mega64 0:bbe849f641a8 720 /* If program operation was failed, a Flash error code is returned */
mega64 0:bbe849f641a8 721 if (FlashStatus != HAL_OK)
mega64 0:bbe849f641a8 722 {
mega64 0:bbe849f641a8 723 return FlashStatus;
mega64 0:bbe849f641a8 724 }
mega64 0:bbe849f641a8 725
mega64 0:bbe849f641a8 726 /* Return last operation flash status */
mega64 0:bbe849f641a8 727 return FlashStatus;
mega64 0:bbe849f641a8 728 }
mega64 0:bbe849f641a8 729
mega64 0:bbe849f641a8 730 /**
mega64 0:bbe849f641a8 731 * @}
mega64 0:bbe849f641a8 732 */
mega64 0:bbe849f641a8 733
mega64 0:bbe849f641a8 734 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/