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@4:0545cac4e5f9, 2016-09-23 (annotated)

Committer:
mega64
Date:
Fri Sep 23 16:53:39 2016 +0000
Revision:
4:0545cac4e5f9
Parent:
3:a51a1737b55d
Child:
5:aa44afa6ca35
Bug fix for not consecutive areas of pages PAGE 0, PAGE 1.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mega64 0:bbe849f641a8 1 /**
mega64 0:bbe849f641a8 2 ******************************************************************************
mega64 3:a51a1737b55d 3 * @file EEPROM_Emulation/src/eeprom.c
mega64 0:bbe849f641a8 4 * @author MCD Application Team
mega64 3:a51a1737b55d 5 * @version V1.6.0
mega64 3:a51a1737b55d 6 * @date 27-May-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 3:a51a1737b55d 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 4:0545cac4e5f9 50 /* Dummy variables to protect eeprom pages if code size is bigger than 32kb, needed in Mbed online compiler to avoid conflict with linker (N.S.) */
mega64 4:0545cac4e5f9 51 const uint8_t Eeprom_area0[PAGE_SIZE] __attribute__((at(PAGE0_BASE_ADDRESS),used))={ [0 ... (PAGE_SIZE-1)] = 0xFF };
mega64 4:0545cac4e5f9 52 const uint8_t Eeprom_area1[PAGE_SIZE] __attribute__((at(PAGE1_BASE_ADDRESS),used))={ [0 ... (PAGE_SIZE-1)] = 0xFF };
mega64 2:3d16b28380a9 53
mega64 2:3d16b28380a9 54
mega64 0:bbe849f641a8 55 /* Global variable used to store variable value in read sequence */
mega64 0:bbe849f641a8 56 uint16_t DataVar = 0;
mega64 0:bbe849f641a8 57
mega64 0:bbe849f641a8 58 /* Virtual address defined by the user: 0xFFFF value is prohibited */
mega64 0:bbe849f641a8 59 extern uint16_t VirtAddVarTab[NB_OF_VAR];
mega64 0:bbe849f641a8 60
mega64 0:bbe849f641a8 61 /* Private function prototypes -----------------------------------------------*/
mega64 0:bbe849f641a8 62 /* Private functions ---------------------------------------------------------*/
mega64 0:bbe849f641a8 63 static HAL_StatusTypeDef EE_Format(void);
mega64 0:bbe849f641a8 64 static uint16_t EE_FindValidPage(uint8_t Operation);
mega64 0:bbe849f641a8 65 static uint16_t EE_VerifyPageFullWriteVariable(uint16_t VirtAddress, uint16_t Data);
mega64 0:bbe849f641a8 66 static uint16_t EE_PageTransfer(uint16_t VirtAddress, uint16_t Data);
mega64 0:bbe849f641a8 67 static uint16_t EE_VerifyPageFullyErased(uint32_t Address);
mega64 0:bbe849f641a8 68
mega64 0:bbe849f641a8 69 /**
mega64 0:bbe849f641a8 70 * @brief Restore the pages to a known good state in case of page's status
mega64 0:bbe849f641a8 71 * corruption after a power loss.
mega64 0:bbe849f641a8 72 * @param None.
mega64 0:bbe849f641a8 73 * @retval - Flash error code: on write Flash error
mega64 0:bbe849f641a8 74 * - FLASH_COMPLETE: on success
mega64 0:bbe849f641a8 75 */
mega64 0:bbe849f641a8 76 uint16_t EE_Init(void)
mega64 0:bbe849f641a8 77 {
mega64 3:a51a1737b55d 78 uint16_t pagestatus0 = 6, pagestatus1 = 6;
mega64 3:a51a1737b55d 79 uint16_t varidx = 0;
mega64 3:a51a1737b55d 80 uint16_t eepromstatus = 0, readstatus = 0;
mega64 0:bbe849f641a8 81 int16_t x = -1;
mega64 3:a51a1737b55d 82 HAL_StatusTypeDef flashstatus;
mega64 3:a51a1737b55d 83 uint32_t page_error = 0;
mega64 3:a51a1737b55d 84 FLASH_EraseInitTypeDef s_eraseinit;
mega64 0:bbe849f641a8 85
mega64 0:bbe849f641a8 86
mega64 0:bbe849f641a8 87 /* Get Page0 status */
mega64 3:a51a1737b55d 88 pagestatus0 = (*(__IO uint16_t*)PAGE0_BASE_ADDRESS);
mega64 0:bbe849f641a8 89 /* Get Page1 status */
mega64 3:a51a1737b55d 90 pagestatus1 = (*(__IO uint16_t*)PAGE1_BASE_ADDRESS);
mega64 0:bbe849f641a8 91
mega64 3:a51a1737b55d 92 /* Fill EraseInit structure*/
mega64 3:a51a1737b55d 93 s_eraseinit.TypeErase = FLASH_TYPEERASE_PAGES;
mega64 3:a51a1737b55d 94 s_eraseinit.PageAddress = PAGE0_BASE_ADDRESS;
mega64 3:a51a1737b55d 95 s_eraseinit.NbPages = 1;
mega64 0:bbe849f641a8 96
mega64 0:bbe849f641a8 97 /* Check for invalid header states and repair if necessary */
mega64 3:a51a1737b55d 98 switch (pagestatus0)
mega64 0:bbe849f641a8 99 {
mega64 0:bbe849f641a8 100 case ERASED:
mega64 3:a51a1737b55d 101 if (pagestatus1 == VALID_PAGE) /* Page0 erased, Page1 valid */
mega64 0:bbe849f641a8 102 {
mega64 0:bbe849f641a8 103 /* Erase Page0 */
mega64 0:bbe849f641a8 104 if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
mega64 0:bbe849f641a8 105 {
mega64 3:a51a1737b55d 106 flashstatus = HAL_FLASHEx_Erase(&s_eraseinit, &page_error);
mega64 0:bbe849f641a8 107 /* If erase operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 108 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 109 {
mega64 3:a51a1737b55d 110 return flashstatus;
mega64 0:bbe849f641a8 111 }
mega64 0:bbe849f641a8 112 }
mega64 0:bbe849f641a8 113 }
mega64 3:a51a1737b55d 114 else if (pagestatus1 == RECEIVE_DATA) /* Page0 erased, Page1 receive */
mega64 0:bbe849f641a8 115 {
mega64 0:bbe849f641a8 116 /* Erase Page0 */
mega64 0:bbe849f641a8 117 if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
mega64 0:bbe849f641a8 118 {
mega64 3:a51a1737b55d 119 flashstatus = HAL_FLASHEx_Erase(&s_eraseinit, &page_error);
mega64 0:bbe849f641a8 120 /* If erase operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 121 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 122 {
mega64 3:a51a1737b55d 123 return flashstatus;
mega64 0:bbe849f641a8 124 }
mega64 0:bbe849f641a8 125 }
mega64 0:bbe849f641a8 126 /* Mark Page1 as valid */
mega64 3:a51a1737b55d 127 flashstatus = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, PAGE1_BASE_ADDRESS, VALID_PAGE);
mega64 0:bbe849f641a8 128 /* If program operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 129 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 130 {
mega64 3:a51a1737b55d 131 return flashstatus;
mega64 0:bbe849f641a8 132 }
mega64 0:bbe849f641a8 133 }
mega64 0:bbe849f641a8 134 else /* First EEPROM access (Page0&1 are erased) or invalid state -> format EEPROM */
mega64 0:bbe849f641a8 135 {
mega64 0:bbe849f641a8 136 /* Erase both Page0 and Page1 and set Page0 as valid page */
mega64 3:a51a1737b55d 137 flashstatus = EE_Format();
mega64 0:bbe849f641a8 138 /* If erase/program operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 139 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 140 {
mega64 3:a51a1737b55d 141 return flashstatus;
mega64 0:bbe849f641a8 142 }
mega64 0:bbe849f641a8 143 }
mega64 0:bbe849f641a8 144 break;
mega64 0:bbe849f641a8 145
mega64 0:bbe849f641a8 146 case RECEIVE_DATA:
mega64 3:a51a1737b55d 147 if (pagestatus1 == VALID_PAGE) /* Page0 receive, Page1 valid */
mega64 0:bbe849f641a8 148 {
mega64 0:bbe849f641a8 149 /* Transfer data from Page1 to Page0 */
mega64 3:a51a1737b55d 150 for (varidx = 0; varidx < NB_OF_VAR; varidx++)
mega64 0:bbe849f641a8 151 {
mega64 3:a51a1737b55d 152 if (( *(__IO uint16_t*)(PAGE0_BASE_ADDRESS + 6)) == VirtAddVarTab[varidx])
mega64 0:bbe849f641a8 153 {
mega64 3:a51a1737b55d 154 x = varidx;
mega64 0:bbe849f641a8 155 }
mega64 3:a51a1737b55d 156 if (varidx != x)
mega64 0:bbe849f641a8 157 {
mega64 0:bbe849f641a8 158 /* Read the last variables' updates */
mega64 3:a51a1737b55d 159 readstatus = EE_ReadVariable(VirtAddVarTab[varidx], &DataVar);
mega64 0:bbe849f641a8 160 /* In case variable corresponding to the virtual address was found */
mega64 3:a51a1737b55d 161 if (readstatus != 0x1)
mega64 0:bbe849f641a8 162 {
mega64 0:bbe849f641a8 163 /* Transfer the variable to the Page0 */
mega64 3:a51a1737b55d 164 eepromstatus = EE_VerifyPageFullWriteVariable(VirtAddVarTab[varidx], DataVar);
mega64 0:bbe849f641a8 165 /* If program operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 166 if (eepromstatus != HAL_OK)
mega64 0:bbe849f641a8 167 {
mega64 3:a51a1737b55d 168 return eepromstatus;
mega64 0:bbe849f641a8 169 }
mega64 0:bbe849f641a8 170 }
mega64 0:bbe849f641a8 171 }
mega64 0:bbe849f641a8 172 }
mega64 0:bbe849f641a8 173 /* Mark Page0 as valid */
mega64 3:a51a1737b55d 174 flashstatus = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, PAGE0_BASE_ADDRESS, VALID_PAGE);
mega64 0:bbe849f641a8 175 /* If program operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 176 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 177 {
mega64 3:a51a1737b55d 178 return flashstatus;
mega64 0:bbe849f641a8 179 }
mega64 3:a51a1737b55d 180 s_eraseinit.TypeErase = FLASH_TYPEERASE_PAGES;
mega64 3:a51a1737b55d 181 s_eraseinit.PageAddress = PAGE1_BASE_ADDRESS;
mega64 3:a51a1737b55d 182 s_eraseinit.NbPages = 1;
mega64 0:bbe849f641a8 183 /* Erase Page1 */
mega64 0:bbe849f641a8 184 if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
mega64 0:bbe849f641a8 185 {
mega64 3:a51a1737b55d 186 flashstatus = HAL_FLASHEx_Erase(&s_eraseinit, &page_error);
mega64 0:bbe849f641a8 187 /* If erase operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 188 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 189 {
mega64 3:a51a1737b55d 190 return flashstatus;
mega64 0:bbe849f641a8 191 }
mega64 0:bbe849f641a8 192 }
mega64 0:bbe849f641a8 193 }
mega64 3:a51a1737b55d 194 else if (pagestatus1 == ERASED) /* Page0 receive, Page1 erased */
mega64 0:bbe849f641a8 195 {
mega64 3:a51a1737b55d 196 s_eraseinit.TypeErase = FLASH_TYPEERASE_PAGES;
mega64 3:a51a1737b55d 197 s_eraseinit.PageAddress = PAGE1_BASE_ADDRESS;
mega64 3:a51a1737b55d 198 s_eraseinit.NbPages = 1;
mega64 0:bbe849f641a8 199 /* Erase Page1 */
mega64 0:bbe849f641a8 200 if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
mega64 0:bbe849f641a8 201 {
mega64 3:a51a1737b55d 202 flashstatus = HAL_FLASHEx_Erase(&s_eraseinit, &page_error);
mega64 0:bbe849f641a8 203 /* If erase operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 204 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 205 {
mega64 3:a51a1737b55d 206 return flashstatus;
mega64 0:bbe849f641a8 207 }
mega64 0:bbe849f641a8 208 }
mega64 0:bbe849f641a8 209 /* Mark Page0 as valid */
mega64 3:a51a1737b55d 210 flashstatus = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, PAGE0_BASE_ADDRESS, VALID_PAGE);
mega64 0:bbe849f641a8 211 /* If program operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 212 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 213 {
mega64 3:a51a1737b55d 214 return flashstatus;
mega64 0:bbe849f641a8 215 }
mega64 0:bbe849f641a8 216 }
mega64 0:bbe849f641a8 217 else /* Invalid state -> format eeprom */
mega64 0:bbe849f641a8 218 {
mega64 0:bbe849f641a8 219 /* Erase both Page0 and Page1 and set Page0 as valid page */
mega64 3:a51a1737b55d 220 flashstatus = EE_Format();
mega64 0:bbe849f641a8 221 /* If erase/program operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 222 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 223 {
mega64 3:a51a1737b55d 224 return flashstatus;
mega64 0:bbe849f641a8 225 }
mega64 0:bbe849f641a8 226 }
mega64 0:bbe849f641a8 227 break;
mega64 0:bbe849f641a8 228
mega64 0:bbe849f641a8 229 case VALID_PAGE:
mega64 3:a51a1737b55d 230 if (pagestatus1 == VALID_PAGE) /* Invalid state -> format eeprom */
mega64 0:bbe849f641a8 231 {
mega64 0:bbe849f641a8 232 /* Erase both Page0 and Page1 and set Page0 as valid page */
mega64 3:a51a1737b55d 233 flashstatus = EE_Format();
mega64 0:bbe849f641a8 234 /* If erase/program operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 235 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 236 {
mega64 3:a51a1737b55d 237 return flashstatus;
mega64 0:bbe849f641a8 238 }
mega64 0:bbe849f641a8 239 }
mega64 3:a51a1737b55d 240 else if (pagestatus1 == ERASED) /* Page0 valid, Page1 erased */
mega64 0:bbe849f641a8 241 {
mega64 3:a51a1737b55d 242 s_eraseinit.TypeErase = FLASH_TYPEERASE_PAGES;
mega64 3:a51a1737b55d 243 s_eraseinit.PageAddress = PAGE1_BASE_ADDRESS;
mega64 3:a51a1737b55d 244 s_eraseinit.NbPages = 1;
mega64 0:bbe849f641a8 245 /* Erase Page1 */
mega64 0:bbe849f641a8 246 if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
mega64 0:bbe849f641a8 247 {
mega64 3:a51a1737b55d 248 flashstatus = HAL_FLASHEx_Erase(&s_eraseinit, &page_error);
mega64 0:bbe849f641a8 249 /* If erase operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 250 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 251 {
mega64 3:a51a1737b55d 252 return flashstatus;
mega64 0:bbe849f641a8 253 }
mega64 0:bbe849f641a8 254 }
mega64 0:bbe849f641a8 255 }
mega64 0:bbe849f641a8 256 else /* Page0 valid, Page1 receive */
mega64 0:bbe849f641a8 257 {
mega64 0:bbe849f641a8 258 /* Transfer data from Page0 to Page1 */
mega64 3:a51a1737b55d 259 for (varidx = 0; varidx < NB_OF_VAR; varidx++)
mega64 0:bbe849f641a8 260 {
mega64 3:a51a1737b55d 261 if ((*(__IO uint16_t*)(PAGE1_BASE_ADDRESS + 6)) == VirtAddVarTab[varidx])
mega64 0:bbe849f641a8 262 {
mega64 3:a51a1737b55d 263 x = varidx;
mega64 0:bbe849f641a8 264 }
mega64 3:a51a1737b55d 265 if (varidx != x)
mega64 0:bbe849f641a8 266 {
mega64 0:bbe849f641a8 267 /* Read the last variables' updates */
mega64 3:a51a1737b55d 268 readstatus = EE_ReadVariable(VirtAddVarTab[varidx], &DataVar);
mega64 0:bbe849f641a8 269 /* In case variable corresponding to the virtual address was found */
mega64 3:a51a1737b55d 270 if (readstatus != 0x1)
mega64 0:bbe849f641a8 271 {
mega64 0:bbe849f641a8 272 /* Transfer the variable to the Page1 */
mega64 3:a51a1737b55d 273 eepromstatus = EE_VerifyPageFullWriteVariable(VirtAddVarTab[varidx], DataVar);
mega64 0:bbe849f641a8 274 /* If program operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 275 if (eepromstatus != HAL_OK)
mega64 0:bbe849f641a8 276 {
mega64 3:a51a1737b55d 277 return eepromstatus;
mega64 0:bbe849f641a8 278 }
mega64 0:bbe849f641a8 279 }
mega64 0:bbe849f641a8 280 }
mega64 0:bbe849f641a8 281 }
mega64 0:bbe849f641a8 282 /* Mark Page1 as valid */
mega64 3:a51a1737b55d 283 flashstatus = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, PAGE1_BASE_ADDRESS, VALID_PAGE);
mega64 0:bbe849f641a8 284 /* If program operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 285 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 286 {
mega64 3:a51a1737b55d 287 return flashstatus;
mega64 0:bbe849f641a8 288 }
mega64 3:a51a1737b55d 289 s_eraseinit.TypeErase = FLASH_TYPEERASE_PAGES;
mega64 3:a51a1737b55d 290 s_eraseinit.PageAddress = PAGE0_BASE_ADDRESS;
mega64 3:a51a1737b55d 291 s_eraseinit.NbPages = 1;
mega64 0:bbe849f641a8 292 /* Erase Page0 */
mega64 0:bbe849f641a8 293 if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
mega64 0:bbe849f641a8 294 {
mega64 3:a51a1737b55d 295 flashstatus = HAL_FLASHEx_Erase(&s_eraseinit, &page_error);
mega64 0:bbe849f641a8 296 /* If erase operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 297 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 298 {
mega64 3:a51a1737b55d 299 return flashstatus;
mega64 0:bbe849f641a8 300 }
mega64 0:bbe849f641a8 301 }
mega64 0:bbe849f641a8 302 }
mega64 0:bbe849f641a8 303 break;
mega64 0:bbe849f641a8 304
mega64 0:bbe849f641a8 305 default: /* Any other state -> format eeprom */
mega64 0:bbe849f641a8 306 /* Erase both Page0 and Page1 and set Page0 as valid page */
mega64 3:a51a1737b55d 307 flashstatus = EE_Format();
mega64 0:bbe849f641a8 308 /* If erase/program operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 309 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 310 {
mega64 3:a51a1737b55d 311 return flashstatus;
mega64 0:bbe849f641a8 312 }
mega64 0:bbe849f641a8 313 break;
mega64 0:bbe849f641a8 314 }
mega64 0:bbe849f641a8 315
mega64 0:bbe849f641a8 316 return HAL_OK;
mega64 0:bbe849f641a8 317 }
mega64 0:bbe849f641a8 318
mega64 0:bbe849f641a8 319 /**
mega64 0:bbe849f641a8 320 * @brief Verify if specified page is fully erased.
mega64 0:bbe849f641a8 321 * @param Address: page address
mega64 0:bbe849f641a8 322 * This parameter can be one of the following values:
mega64 0:bbe849f641a8 323 * @arg PAGE0_BASE_ADDRESS: Page0 base address
mega64 0:bbe849f641a8 324 * @arg PAGE1_BASE_ADDRESS: Page1 base address
mega64 0:bbe849f641a8 325 * @retval page fully erased status:
mega64 0:bbe849f641a8 326 * - 0: if Page not erased
mega64 0:bbe849f641a8 327 * - 1: if Page erased
mega64 0:bbe849f641a8 328 */
mega64 0:bbe849f641a8 329 uint16_t EE_VerifyPageFullyErased(uint32_t Address)
mega64 0:bbe849f641a8 330 {
mega64 3:a51a1737b55d 331 uint32_t readstatus = 1;
mega64 3:a51a1737b55d 332 uint16_t addressvalue = 0x5555;
mega64 0:bbe849f641a8 333
mega64 0:bbe849f641a8 334 /* Check each active page address starting from end */
mega64 0:bbe849f641a8 335 while (Address <= PAGE0_END_ADDRESS)
mega64 0:bbe849f641a8 336 {
mega64 0:bbe849f641a8 337 /* Get the current location content to be compared with virtual address */
mega64 3:a51a1737b55d 338 addressvalue = (*(__IO uint16_t*)Address);
mega64 0:bbe849f641a8 339
mega64 0:bbe849f641a8 340 /* Compare the read address with the virtual address */
mega64 3:a51a1737b55d 341 if (addressvalue != ERASED)
mega64 0:bbe849f641a8 342 {
mega64 0:bbe849f641a8 343
mega64 3:a51a1737b55d 344 /* In case variable value is read, reset readstatus flag */
mega64 3:a51a1737b55d 345 readstatus = 0;
mega64 0:bbe849f641a8 346
mega64 0:bbe849f641a8 347 break;
mega64 0:bbe849f641a8 348 }
mega64 0:bbe849f641a8 349 /* Next address location */
mega64 0:bbe849f641a8 350 Address = Address + 4;
mega64 0:bbe849f641a8 351 }
mega64 0:bbe849f641a8 352
mega64 3:a51a1737b55d 353 /* Return readstatus value: (0: Page not erased, 1: Page erased) */
mega64 3:a51a1737b55d 354 return readstatus;
mega64 0:bbe849f641a8 355 }
mega64 0:bbe849f641a8 356
mega64 0:bbe849f641a8 357 /**
mega64 0:bbe849f641a8 358 * @brief Returns the last stored variable data, if found, which correspond to
mega64 0:bbe849f641a8 359 * the passed virtual address
mega64 0:bbe849f641a8 360 * @param VirtAddress: Variable virtual address
mega64 0:bbe849f641a8 361 * @param Data: Global variable contains the read variable value
mega64 0:bbe849f641a8 362 * @retval Success or error status:
mega64 0:bbe849f641a8 363 * - 0: if variable was found
mega64 0:bbe849f641a8 364 * - 1: if the variable was not found
mega64 0:bbe849f641a8 365 * - NO_VALID_PAGE: if no valid page was found.
mega64 0:bbe849f641a8 366 */
mega64 0:bbe849f641a8 367 uint16_t EE_ReadVariable(uint16_t VirtAddress, uint16_t* Data)
mega64 0:bbe849f641a8 368 {
mega64 3:a51a1737b55d 369 uint16_t validpage = PAGE0;
mega64 3:a51a1737b55d 370 uint16_t addressvalue = 0x5555, readstatus = 1;
mega64 3:a51a1737b55d 371 uint32_t address = EEPROM_START_ADDRESS, PageStartAddress = EEPROM_START_ADDRESS;
mega64 0:bbe849f641a8 372
mega64 0:bbe849f641a8 373 /* Get active Page for read operation */
mega64 3:a51a1737b55d 374 validpage = EE_FindValidPage(READ_FROM_VALID_PAGE);
mega64 0:bbe849f641a8 375
mega64 0:bbe849f641a8 376 /* Check if there is no valid page */
mega64 3:a51a1737b55d 377 if (validpage == NO_VALID_PAGE)
mega64 0:bbe849f641a8 378 {
mega64 0:bbe849f641a8 379 return NO_VALID_PAGE;
mega64 0:bbe849f641a8 380 }
mega64 0:bbe849f641a8 381
mega64 0:bbe849f641a8 382 /* Get the valid Page start Address */
mega64 3:a51a1737b55d 383 PageStartAddress = (uint32_t)(EEPROM_START_ADDRESS + (uint32_t)(validpage * PAGE_SIZE));
mega64 0:bbe849f641a8 384
mega64 0:bbe849f641a8 385 /* Get the valid Page end Address */
mega64 3:a51a1737b55d 386 address = (uint32_t)((EEPROM_START_ADDRESS - 2) + (uint32_t)((1 + validpage) * PAGE_SIZE));
mega64 0:bbe849f641a8 387
mega64 0:bbe849f641a8 388 /* Check each active page address starting from end */
mega64 3:a51a1737b55d 389 while (address > (PageStartAddress + 2))
mega64 0:bbe849f641a8 390 {
mega64 0:bbe849f641a8 391 /* Get the current location content to be compared with virtual address */
mega64 3:a51a1737b55d 392 addressvalue = (*(__IO uint16_t*)address);
mega64 0:bbe849f641a8 393
mega64 0:bbe849f641a8 394 /* Compare the read address with the virtual address */
mega64 3:a51a1737b55d 395 if (addressvalue == VirtAddress)
mega64 0:bbe849f641a8 396 {
mega64 0:bbe849f641a8 397 /* Get content of Address-2 which is variable value */
mega64 3:a51a1737b55d 398 *Data = (*(__IO uint16_t*)(address - 2));
mega64 0:bbe849f641a8 399
mega64 3:a51a1737b55d 400 /* In case variable value is read, reset readstatus flag */
mega64 3:a51a1737b55d 401 readstatus = 0;
mega64 0:bbe849f641a8 402
mega64 0:bbe849f641a8 403 break;
mega64 0:bbe849f641a8 404 }
mega64 0:bbe849f641a8 405 else
mega64 0:bbe849f641a8 406 {
mega64 0:bbe849f641a8 407 /* Next address location */
mega64 3:a51a1737b55d 408 address = address - 4;
mega64 0:bbe849f641a8 409 }
mega64 0:bbe849f641a8 410 }
mega64 0:bbe849f641a8 411
mega64 3:a51a1737b55d 412 /* Return readstatus value: (0: variable exist, 1: variable doesn't exist) */
mega64 3:a51a1737b55d 413 return readstatus;
mega64 0:bbe849f641a8 414 }
mega64 0:bbe849f641a8 415
mega64 0:bbe849f641a8 416 /**
mega64 0:bbe849f641a8 417 * @brief Writes/upadtes variable data in EEPROM.
mega64 0:bbe849f641a8 418 * @param VirtAddress: Variable virtual address
mega64 0:bbe849f641a8 419 * @param Data: 16 bit data to be written
mega64 0:bbe849f641a8 420 * @retval Success or error status:
mega64 0:bbe849f641a8 421 * - FLASH_COMPLETE: on success
mega64 0:bbe849f641a8 422 * - PAGE_FULL: if valid page is full
mega64 0:bbe849f641a8 423 * - NO_VALID_PAGE: if no valid page was found
mega64 0:bbe849f641a8 424 * - Flash error code: on write Flash error
mega64 0:bbe849f641a8 425 */
mega64 0:bbe849f641a8 426 uint16_t EE_WriteVariable(uint16_t VirtAddress, uint16_t Data)
mega64 0:bbe849f641a8 427 {
mega64 0:bbe849f641a8 428 uint16_t Status = 0;
mega64 0:bbe849f641a8 429
mega64 0:bbe849f641a8 430 /* Write the variable virtual address and value in the EEPROM */
mega64 0:bbe849f641a8 431 Status = EE_VerifyPageFullWriteVariable(VirtAddress, Data);
mega64 0:bbe849f641a8 432
mega64 0:bbe849f641a8 433 /* In case the EEPROM active page is full */
mega64 0:bbe849f641a8 434 if (Status == PAGE_FULL)
mega64 0:bbe849f641a8 435 {
mega64 0:bbe849f641a8 436 /* Perform Page transfer */
mega64 0:bbe849f641a8 437 Status = EE_PageTransfer(VirtAddress, Data);
mega64 0:bbe849f641a8 438 }
mega64 0:bbe849f641a8 439
mega64 0:bbe849f641a8 440 /* Return last operation status */
mega64 0:bbe849f641a8 441 return Status;
mega64 0:bbe849f641a8 442 }
mega64 0:bbe849f641a8 443
mega64 0:bbe849f641a8 444 /**
mega64 0:bbe849f641a8 445 * @brief Erases PAGE and PAGE1 and writes VALID_PAGE header to PAGE
mega64 0:bbe849f641a8 446 * @param None
mega64 0:bbe849f641a8 447 * @retval Status of the last operation (Flash write or erase) done during
mega64 0:bbe849f641a8 448 * EEPROM formating
mega64 0:bbe849f641a8 449 */
mega64 0:bbe849f641a8 450 static HAL_StatusTypeDef EE_Format(void)
mega64 0:bbe849f641a8 451 {
mega64 3:a51a1737b55d 452 HAL_StatusTypeDef flashstatus = HAL_OK;
mega64 3:a51a1737b55d 453 uint32_t page_error = 0;
mega64 3:a51a1737b55d 454 FLASH_EraseInitTypeDef s_eraseinit;
mega64 0:bbe849f641a8 455
mega64 3:a51a1737b55d 456 s_eraseinit.TypeErase = FLASH_TYPEERASE_PAGES;
mega64 3:a51a1737b55d 457 s_eraseinit.PageAddress = PAGE0_BASE_ADDRESS;
mega64 3:a51a1737b55d 458 s_eraseinit.NbPages = 1;
mega64 0:bbe849f641a8 459 /* Erase Page0 */
mega64 0:bbe849f641a8 460 if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
mega64 0:bbe849f641a8 461 {
mega64 3:a51a1737b55d 462 flashstatus = HAL_FLASHEx_Erase(&s_eraseinit, &page_error);
mega64 0:bbe849f641a8 463 /* If erase operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 464 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 465 {
mega64 3:a51a1737b55d 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 3:a51a1737b55d 470 flashstatus = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, PAGE0_BASE_ADDRESS, VALID_PAGE);
mega64 0:bbe849f641a8 471 /* If program operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 472 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 473 {
mega64 3:a51a1737b55d 474 return flashstatus;
mega64 0:bbe849f641a8 475 }
mega64 0:bbe849f641a8 476
mega64 3:a51a1737b55d 477 s_eraseinit.PageAddress = PAGE1_BASE_ADDRESS;
mega64 0:bbe849f641a8 478 /* Erase Page1 */
mega64 0:bbe849f641a8 479 if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
mega64 0:bbe849f641a8 480 {
mega64 3:a51a1737b55d 481 flashstatus = HAL_FLASHEx_Erase(&s_eraseinit, &page_error);
mega64 0:bbe849f641a8 482 /* If erase operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 483 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 484 {
mega64 3:a51a1737b55d 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 3:a51a1737b55d 503 uint16_t pagestatus0 = 6, pagestatus1 = 6;
mega64 0:bbe849f641a8 504
mega64 0:bbe849f641a8 505 /* Get Page0 actual status */
mega64 3:a51a1737b55d 506 pagestatus0 = (*(__IO uint16_t*)PAGE0_BASE_ADDRESS);
mega64 0:bbe849f641a8 507
mega64 0:bbe849f641a8 508 /* Get Page1 actual status */
mega64 3:a51a1737b55d 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 3:a51a1737b55d 515 if (pagestatus1 == VALID_PAGE)
mega64 0:bbe849f641a8 516 {
mega64 0:bbe849f641a8 517 /* Page0 receiving data */
mega64 3:a51a1737b55d 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 3:a51a1737b55d 527 else if (pagestatus0 == VALID_PAGE)
mega64 0:bbe849f641a8 528 {
mega64 0:bbe849f641a8 529 /* Page1 receiving data */
mega64 3:a51a1737b55d 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 3:a51a1737b55d 545 if (pagestatus0 == VALID_PAGE)
mega64 0:bbe849f641a8 546 {
mega64 0:bbe849f641a8 547 return PAGE0; /* Page0 valid */
mega64 0:bbe849f641a8 548 }
mega64 3:a51a1737b55d 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 3:a51a1737b55d 575 HAL_StatusTypeDef flashstatus = HAL_OK;
mega64 3:a51a1737b55d 576 uint16_t validpage = PAGE0;
mega64 3:a51a1737b55d 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 3:a51a1737b55d 580 validpage = EE_FindValidPage(WRITE_IN_VALID_PAGE);
mega64 0:bbe849f641a8 581
mega64 0:bbe849f641a8 582 /* Check if there is no valid page */
mega64 3:a51a1737b55d 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 3:a51a1737b55d 588 /* Get the valid Page start address */
mega64 3:a51a1737b55d 589 address = (uint32_t)(EEPROM_START_ADDRESS + (uint32_t)(validpage * PAGE_SIZE));
mega64 0:bbe849f641a8 590
mega64 3:a51a1737b55d 591 /* Get the valid Page end address */
mega64 3:a51a1737b55d 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 3:a51a1737b55d 595 while (address < pageendaddress)
mega64 0:bbe849f641a8 596 {
mega64 3:a51a1737b55d 597 /* Verify if address and address+2 contents are 0xFFFFFFFF */
mega64 3:a51a1737b55d 598 if ((*(__IO uint32_t*)address) == 0xFFFFFFFF)
mega64 0:bbe849f641a8 599 {
mega64 0:bbe849f641a8 600 /* Set variable data */
mega64 3:a51a1737b55d 601 flashstatus = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, address, Data);
mega64 0:bbe849f641a8 602 /* If program operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 603 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 604 {
mega64 3:a51a1737b55d 605 return flashstatus;
mega64 0:bbe849f641a8 606 }
mega64 0:bbe849f641a8 607 /* Set variable virtual address */
mega64 3:a51a1737b55d 608 flashstatus = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, address + 2, VirtAddress);
mega64 0:bbe849f641a8 609 /* Return program operation status */
mega64 3:a51a1737b55d 610 return flashstatus;
mega64 0:bbe849f641a8 611 }
mega64 0:bbe849f641a8 612 else
mega64 0:bbe849f641a8 613 {
mega64 0:bbe849f641a8 614 /* Next address location */
mega64 3:a51a1737b55d 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 3:a51a1737b55d 636 HAL_StatusTypeDef flashstatus = HAL_OK;
mega64 3:a51a1737b55d 637 uint32_t newpageaddress = EEPROM_START_ADDRESS;
mega64 3:a51a1737b55d 638 uint32_t oldpageid = 0;
mega64 3:a51a1737b55d 639 uint16_t validpage = PAGE0, varidx = 0;
mega64 3:a51a1737b55d 640 uint16_t eepromstatus = 0, readstatus = 0;
mega64 3:a51a1737b55d 641 uint32_t page_error = 0;
mega64 3:a51a1737b55d 642 FLASH_EraseInitTypeDef s_eraseinit;
mega64 0:bbe849f641a8 643
mega64 0:bbe849f641a8 644 /* Get active Page for read operation */
mega64 3:a51a1737b55d 645 validpage = EE_FindValidPage(READ_FROM_VALID_PAGE);
mega64 0:bbe849f641a8 646
mega64 3:a51a1737b55d 647 if (validpage == PAGE1) /* Page1 valid */
mega64 0:bbe849f641a8 648 {
mega64 0:bbe849f641a8 649 /* New page address where variable will be moved to */
mega64 3:a51a1737b55d 650 newpageaddress = PAGE0_BASE_ADDRESS;
mega64 0:bbe849f641a8 651
mega64 0:bbe849f641a8 652 /* Old page ID where variable will be taken from */
mega64 3:a51a1737b55d 653 oldpageid = PAGE1_BASE_ADDRESS;
mega64 0:bbe849f641a8 654 }
mega64 3:a51a1737b55d 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 3:a51a1737b55d 658 newpageaddress = PAGE1_BASE_ADDRESS;
mega64 0:bbe849f641a8 659
mega64 0:bbe849f641a8 660 /* Old page ID where variable will be taken from */
mega64 3:a51a1737b55d 661 oldpageid = PAGE0_BASE_ADDRESS;
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 3:a51a1737b55d 669 flashstatus = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, newpageaddress, RECEIVE_DATA);
mega64 0:bbe849f641a8 670 /* If program operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 671 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 672 {
mega64 3:a51a1737b55d 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 3:a51a1737b55d 677 eepromstatus = EE_VerifyPageFullWriteVariable(VirtAddress, Data);
mega64 0:bbe849f641a8 678 /* If program operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 679 if (eepromstatus != HAL_OK)
mega64 0:bbe849f641a8 680 {
mega64 3:a51a1737b55d 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 3:a51a1737b55d 685 for (varidx = 0; varidx < NB_OF_VAR; varidx++)
mega64 0:bbe849f641a8 686 {
mega64 3:a51a1737b55d 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 3:a51a1737b55d 690 readstatus = EE_ReadVariable(VirtAddVarTab[varidx], &DataVar);
mega64 0:bbe849f641a8 691 /* In case variable corresponding to the virtual address was found */
mega64 3:a51a1737b55d 692 if (readstatus != 0x1)
mega64 0:bbe849f641a8 693 {
mega64 0:bbe849f641a8 694 /* Transfer the variable to the new active page */
mega64 3:a51a1737b55d 695 eepromstatus = EE_VerifyPageFullWriteVariable(VirtAddVarTab[varidx], DataVar);
mega64 0:bbe849f641a8 696 /* If program operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 697 if (eepromstatus != HAL_OK)
mega64 0:bbe849f641a8 698 {
mega64 3:a51a1737b55d 699 return eepromstatus;
mega64 0:bbe849f641a8 700 }
mega64 0:bbe849f641a8 701 }
mega64 0:bbe849f641a8 702 }
mega64 0:bbe849f641a8 703 }
mega64 0:bbe849f641a8 704
mega64 3:a51a1737b55d 705 s_eraseinit.TypeErase = FLASH_TYPEERASE_PAGES;
mega64 3:a51a1737b55d 706 s_eraseinit.PageAddress = oldpageid;
mega64 3:a51a1737b55d 707 s_eraseinit.NbPages = 1;
mega64 0:bbe849f641a8 708
mega64 0:bbe849f641a8 709 /* Erase the old Page: Set old Page status to ERASED status */
mega64 3:a51a1737b55d 710 flashstatus = HAL_FLASHEx_Erase(&s_eraseinit, &page_error);
mega64 0:bbe849f641a8 711 /* If erase operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 712 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 713 {
mega64 3:a51a1737b55d 714 return flashstatus;
mega64 0:bbe849f641a8 715 }
mega64 0:bbe849f641a8 716
mega64 0:bbe849f641a8 717 /* Set new Page status to VALID_PAGE status */
mega64 3:a51a1737b55d 718 flashstatus = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, newpageaddress, VALID_PAGE);
mega64 0:bbe849f641a8 719 /* If program operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 720 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 721 {
mega64 3:a51a1737b55d 722 return flashstatus;
mega64 0:bbe849f641a8 723 }
mega64 3:a51a1737b55d 724
mega64 3:a51a1737b55d 725
mega64 0:bbe849f641a8 726
mega64 0:bbe849f641a8 727 /* Return last operation flash status */
mega64 3:a51a1737b55d 728 return flashstatus;
mega64 0:bbe849f641a8 729 }
mega64 0:bbe849f641a8 730
mega64 0:bbe849f641a8 731 /**
mega64 0:bbe849f641a8 732 * @}
mega64 0:bbe849f641a8 733 */
mega64 0:bbe849f641a8 734
mega64 3:a51a1737b55d 735 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/