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@6:669ff12928f9, 2016-09-23 (annotated)

Committer:
mega64
Date:
Fri Sep 23 23:58:25 2016 +0000
Revision:
6:669ff12928f9
Parent:
5:aa44afa6ca35 
Added possibility to increase size of virtual pages of emulation

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 6:669ff12928f9 95 s_eraseinit.NbPages = PAGE_NB_PVP;
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 6:669ff12928f9 182 s_eraseinit.NbPages = PAGE_NB_PVP;
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 6:669ff12928f9 198 s_eraseinit.NbPages = PAGE_NB_PVP;
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 6:669ff12928f9 244 s_eraseinit.NbPages = PAGE_NB_PVP;
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 6:669ff12928f9 291 s_eraseinit.NbPages = PAGE_NB_PVP;
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 5:aa44afa6ca35 333 uint32_t end_address;
mega64 5:aa44afa6ca35 334
mega64 5:aa44afa6ca35 335 if (PAGE0_BASE_ADDRESS==Address)
mega64 5:aa44afa6ca35 336 {
mega64 5:aa44afa6ca35 337 end_address = PAGE0_END_ADDRESS;
mega64 5:aa44afa6ca35 338 }
mega64 5:aa44afa6ca35 339 else
mega64 5:aa44afa6ca35 340 {
mega64 5:aa44afa6ca35 341 end_address = PAGE1_END_ADDRESS;
mega64 5:aa44afa6ca35 342 };
mega64 5:aa44afa6ca35 343
mega64 0:bbe849f641a8 344
mega64 0:bbe849f641a8 345 /* Check each active page address starting from end */
mega64 5:aa44afa6ca35 346 while (Address <= end_address)
mega64 0:bbe849f641a8 347 {
mega64 0:bbe849f641a8 348 /* Get the current location content to be compared with virtual address */
mega64 3:a51a1737b55d 349 addressvalue = (*(__IO uint16_t*)Address);
mega64 0:bbe849f641a8 350
mega64 0:bbe849f641a8 351 /* Compare the read address with the virtual address */
mega64 3:a51a1737b55d 352 if (addressvalue != ERASED)
mega64 0:bbe849f641a8 353 {
mega64 0:bbe849f641a8 354
mega64 3:a51a1737b55d 355 /* In case variable value is read, reset readstatus flag */
mega64 3:a51a1737b55d 356 readstatus = 0;
mega64 0:bbe849f641a8 357
mega64 0:bbe849f641a8 358 break;
mega64 0:bbe849f641a8 359 }
mega64 0:bbe849f641a8 360 /* Next address location */
mega64 0:bbe849f641a8 361 Address = Address + 4;
mega64 0:bbe849f641a8 362 }
mega64 0:bbe849f641a8 363
mega64 3:a51a1737b55d 364 /* Return readstatus value: (0: Page not erased, 1: Page erased) */
mega64 3:a51a1737b55d 365 return readstatus;
mega64 0:bbe849f641a8 366 }
mega64 0:bbe849f641a8 367
mega64 0:bbe849f641a8 368 /**
mega64 0:bbe849f641a8 369 * @brief Returns the last stored variable data, if found, which correspond to
mega64 0:bbe849f641a8 370 * the passed virtual address
mega64 0:bbe849f641a8 371 * @param VirtAddress: Variable virtual address
mega64 0:bbe849f641a8 372 * @param Data: Global variable contains the read variable value
mega64 0:bbe849f641a8 373 * @retval Success or error status:
mega64 0:bbe849f641a8 374 * - 0: if variable was found
mega64 0:bbe849f641a8 375 * - 1: if the variable was not found
mega64 0:bbe849f641a8 376 * - NO_VALID_PAGE: if no valid page was found.
mega64 0:bbe849f641a8 377 */
mega64 0:bbe849f641a8 378 uint16_t EE_ReadVariable(uint16_t VirtAddress, uint16_t* Data)
mega64 0:bbe849f641a8 379 {
mega64 3:a51a1737b55d 380 uint16_t validpage = PAGE0;
mega64 3:a51a1737b55d 381 uint16_t addressvalue = 0x5555, readstatus = 1;
mega64 3:a51a1737b55d 382 uint32_t address = EEPROM_START_ADDRESS, PageStartAddress = EEPROM_START_ADDRESS;
mega64 0:bbe849f641a8 383
mega64 0:bbe849f641a8 384 /* Get active Page for read operation */
mega64 3:a51a1737b55d 385 validpage = EE_FindValidPage(READ_FROM_VALID_PAGE);
mega64 0:bbe849f641a8 386
mega64 0:bbe849f641a8 387 /* Check if there is no valid page */
mega64 3:a51a1737b55d 388 if (validpage == NO_VALID_PAGE)
mega64 0:bbe849f641a8 389 {
mega64 0:bbe849f641a8 390 return NO_VALID_PAGE;
mega64 0:bbe849f641a8 391 }
mega64 0:bbe849f641a8 392
mega64 0:bbe849f641a8 393 /* Get the valid Page start Address */
mega64 3:a51a1737b55d 394 PageStartAddress = (uint32_t)(EEPROM_START_ADDRESS + (uint32_t)(validpage * PAGE_SIZE));
mega64 0:bbe849f641a8 395
mega64 0:bbe849f641a8 396 /* Get the valid Page end Address */
mega64 3:a51a1737b55d 397 address = (uint32_t)((EEPROM_START_ADDRESS - 2) + (uint32_t)((1 + validpage) * PAGE_SIZE));
mega64 0:bbe849f641a8 398
mega64 0:bbe849f641a8 399 /* Check each active page address starting from end */
mega64 3:a51a1737b55d 400 while (address > (PageStartAddress + 2))
mega64 0:bbe849f641a8 401 {
mega64 0:bbe849f641a8 402 /* Get the current location content to be compared with virtual address */
mega64 3:a51a1737b55d 403 addressvalue = (*(__IO uint16_t*)address);
mega64 0:bbe849f641a8 404
mega64 0:bbe849f641a8 405 /* Compare the read address with the virtual address */
mega64 3:a51a1737b55d 406 if (addressvalue == VirtAddress)
mega64 0:bbe849f641a8 407 {
mega64 0:bbe849f641a8 408 /* Get content of Address-2 which is variable value */
mega64 3:a51a1737b55d 409 *Data = (*(__IO uint16_t*)(address - 2));
mega64 0:bbe849f641a8 410
mega64 3:a51a1737b55d 411 /* In case variable value is read, reset readstatus flag */
mega64 3:a51a1737b55d 412 readstatus = 0;
mega64 0:bbe849f641a8 413
mega64 0:bbe849f641a8 414 break;
mega64 0:bbe849f641a8 415 }
mega64 0:bbe849f641a8 416 else
mega64 0:bbe849f641a8 417 {
mega64 0:bbe849f641a8 418 /* Next address location */
mega64 3:a51a1737b55d 419 address = address - 4;
mega64 0:bbe849f641a8 420 }
mega64 0:bbe849f641a8 421 }
mega64 0:bbe849f641a8 422
mega64 3:a51a1737b55d 423 /* Return readstatus value: (0: variable exist, 1: variable doesn't exist) */
mega64 3:a51a1737b55d 424 return readstatus;
mega64 0:bbe849f641a8 425 }
mega64 0:bbe849f641a8 426
mega64 0:bbe849f641a8 427 /**
mega64 0:bbe849f641a8 428 * @brief Writes/upadtes variable data in EEPROM.
mega64 0:bbe849f641a8 429 * @param VirtAddress: Variable virtual address
mega64 0:bbe849f641a8 430 * @param Data: 16 bit data to be written
mega64 0:bbe849f641a8 431 * @retval Success or error status:
mega64 0:bbe849f641a8 432 * - FLASH_COMPLETE: on success
mega64 0:bbe849f641a8 433 * - PAGE_FULL: if valid page is full
mega64 0:bbe849f641a8 434 * - NO_VALID_PAGE: if no valid page was found
mega64 0:bbe849f641a8 435 * - Flash error code: on write Flash error
mega64 0:bbe849f641a8 436 */
mega64 0:bbe849f641a8 437 uint16_t EE_WriteVariable(uint16_t VirtAddress, uint16_t Data)
mega64 0:bbe849f641a8 438 {
mega64 0:bbe849f641a8 439 uint16_t Status = 0;
mega64 0:bbe849f641a8 440
mega64 0:bbe849f641a8 441 /* Write the variable virtual address and value in the EEPROM */
mega64 0:bbe849f641a8 442 Status = EE_VerifyPageFullWriteVariable(VirtAddress, Data);
mega64 0:bbe849f641a8 443
mega64 0:bbe849f641a8 444 /* In case the EEPROM active page is full */
mega64 0:bbe849f641a8 445 if (Status == PAGE_FULL)
mega64 0:bbe849f641a8 446 {
mega64 0:bbe849f641a8 447 /* Perform Page transfer */
mega64 0:bbe849f641a8 448 Status = EE_PageTransfer(VirtAddress, Data);
mega64 0:bbe849f641a8 449 }
mega64 0:bbe849f641a8 450
mega64 0:bbe849f641a8 451 /* Return last operation status */
mega64 0:bbe849f641a8 452 return Status;
mega64 0:bbe849f641a8 453 }
mega64 0:bbe849f641a8 454
mega64 0:bbe849f641a8 455 /**
mega64 0:bbe849f641a8 456 * @brief Erases PAGE and PAGE1 and writes VALID_PAGE header to PAGE
mega64 0:bbe849f641a8 457 * @param None
mega64 0:bbe849f641a8 458 * @retval Status of the last operation (Flash write or erase) done during
mega64 0:bbe849f641a8 459 * EEPROM formating
mega64 0:bbe849f641a8 460 */
mega64 0:bbe849f641a8 461 static HAL_StatusTypeDef EE_Format(void)
mega64 0:bbe849f641a8 462 {
mega64 3:a51a1737b55d 463 HAL_StatusTypeDef flashstatus = HAL_OK;
mega64 3:a51a1737b55d 464 uint32_t page_error = 0;
mega64 3:a51a1737b55d 465 FLASH_EraseInitTypeDef s_eraseinit;
mega64 0:bbe849f641a8 466
mega64 3:a51a1737b55d 467 s_eraseinit.TypeErase = FLASH_TYPEERASE_PAGES;
mega64 3:a51a1737b55d 468 s_eraseinit.PageAddress = PAGE0_BASE_ADDRESS;
mega64 6:669ff12928f9 469 s_eraseinit.NbPages = PAGE_NB_PVP;
mega64 0:bbe849f641a8 470 /* Erase Page0 */
mega64 0:bbe849f641a8 471 if(!EE_VerifyPageFullyErased(PAGE0_BASE_ADDRESS))
mega64 0:bbe849f641a8 472 {
mega64 3:a51a1737b55d 473 flashstatus = HAL_FLASHEx_Erase(&s_eraseinit, &page_error);
mega64 0:bbe849f641a8 474 /* If erase operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 475 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 476 {
mega64 3:a51a1737b55d 477 return flashstatus;
mega64 0:bbe849f641a8 478 }
mega64 0:bbe849f641a8 479 }
mega64 0:bbe849f641a8 480 /* Set Page0 as valid page: Write VALID_PAGE at Page0 base address */
mega64 3:a51a1737b55d 481 flashstatus = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, PAGE0_BASE_ADDRESS, VALID_PAGE);
mega64 0:bbe849f641a8 482 /* If program 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 3:a51a1737b55d 488 s_eraseinit.PageAddress = PAGE1_BASE_ADDRESS;
mega64 0:bbe849f641a8 489 /* Erase Page1 */
mega64 0:bbe849f641a8 490 if(!EE_VerifyPageFullyErased(PAGE1_BASE_ADDRESS))
mega64 0:bbe849f641a8 491 {
mega64 3:a51a1737b55d 492 flashstatus = HAL_FLASHEx_Erase(&s_eraseinit, &page_error);
mega64 0:bbe849f641a8 493 /* If erase operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 494 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 495 {
mega64 3:a51a1737b55d 496 return flashstatus;
mega64 0:bbe849f641a8 497 }
mega64 0:bbe849f641a8 498 }
mega64 0:bbe849f641a8 499
mega64 0:bbe849f641a8 500 return HAL_OK;
mega64 0:bbe849f641a8 501 }
mega64 0:bbe849f641a8 502
mega64 0:bbe849f641a8 503 /**
mega64 0:bbe849f641a8 504 * @brief Find valid Page for write or read operation
mega64 0:bbe849f641a8 505 * @param Operation: operation to achieve on the valid page.
mega64 0:bbe849f641a8 506 * This parameter can be one of the following values:
mega64 0:bbe849f641a8 507 * @arg READ_FROM_VALID_PAGE: read operation from valid page
mega64 0:bbe849f641a8 508 * @arg WRITE_IN_VALID_PAGE: write operation from valid page
mega64 0:bbe849f641a8 509 * @retval Valid page number (PAGE or PAGE1) or NO_VALID_PAGE in case
mega64 0:bbe849f641a8 510 * of no valid page was found
mega64 0:bbe849f641a8 511 */
mega64 0:bbe849f641a8 512 static uint16_t EE_FindValidPage(uint8_t Operation)
mega64 0:bbe849f641a8 513 {
mega64 3:a51a1737b55d 514 uint16_t pagestatus0 = 6, pagestatus1 = 6;
mega64 0:bbe849f641a8 515
mega64 0:bbe849f641a8 516 /* Get Page0 actual status */
mega64 3:a51a1737b55d 517 pagestatus0 = (*(__IO uint16_t*)PAGE0_BASE_ADDRESS);
mega64 0:bbe849f641a8 518
mega64 0:bbe849f641a8 519 /* Get Page1 actual status */
mega64 3:a51a1737b55d 520 pagestatus1 = (*(__IO uint16_t*)PAGE1_BASE_ADDRESS);
mega64 0:bbe849f641a8 521
mega64 0:bbe849f641a8 522 /* Write or read operation */
mega64 0:bbe849f641a8 523 switch (Operation)
mega64 0:bbe849f641a8 524 {
mega64 0:bbe849f641a8 525 case WRITE_IN_VALID_PAGE: /* ---- Write operation ---- */
mega64 3:a51a1737b55d 526 if (pagestatus1 == VALID_PAGE)
mega64 0:bbe849f641a8 527 {
mega64 0:bbe849f641a8 528 /* Page0 receiving data */
mega64 3:a51a1737b55d 529 if (pagestatus0 == RECEIVE_DATA)
mega64 0:bbe849f641a8 530 {
mega64 0:bbe849f641a8 531 return PAGE0; /* Page0 valid */
mega64 0:bbe849f641a8 532 }
mega64 0:bbe849f641a8 533 else
mega64 0:bbe849f641a8 534 {
mega64 0:bbe849f641a8 535 return PAGE1; /* Page1 valid */
mega64 0:bbe849f641a8 536 }
mega64 0:bbe849f641a8 537 }
mega64 3:a51a1737b55d 538 else if (pagestatus0 == VALID_PAGE)
mega64 0:bbe849f641a8 539 {
mega64 0:bbe849f641a8 540 /* Page1 receiving data */
mega64 3:a51a1737b55d 541 if (pagestatus1 == RECEIVE_DATA)
mega64 0:bbe849f641a8 542 {
mega64 0:bbe849f641a8 543 return PAGE1; /* Page1 valid */
mega64 0:bbe849f641a8 544 }
mega64 0:bbe849f641a8 545 else
mega64 0:bbe849f641a8 546 {
mega64 0:bbe849f641a8 547 return PAGE0; /* Page0 valid */
mega64 0:bbe849f641a8 548 }
mega64 0:bbe849f641a8 549 }
mega64 0:bbe849f641a8 550 else
mega64 0:bbe849f641a8 551 {
mega64 0:bbe849f641a8 552 return NO_VALID_PAGE; /* No valid Page */
mega64 0:bbe849f641a8 553 }
mega64 0:bbe849f641a8 554
mega64 0:bbe849f641a8 555 case READ_FROM_VALID_PAGE: /* ---- Read operation ---- */
mega64 3:a51a1737b55d 556 if (pagestatus0 == VALID_PAGE)
mega64 0:bbe849f641a8 557 {
mega64 0:bbe849f641a8 558 return PAGE0; /* Page0 valid */
mega64 0:bbe849f641a8 559 }
mega64 3:a51a1737b55d 560 else if (pagestatus1 == VALID_PAGE)
mega64 0:bbe849f641a8 561 {
mega64 0:bbe849f641a8 562 return PAGE1; /* Page1 valid */
mega64 0:bbe849f641a8 563 }
mega64 0:bbe849f641a8 564 else
mega64 0:bbe849f641a8 565 {
mega64 0:bbe849f641a8 566 return NO_VALID_PAGE ; /* No valid Page */
mega64 0:bbe849f641a8 567 }
mega64 0:bbe849f641a8 568
mega64 0:bbe849f641a8 569 default:
mega64 0:bbe849f641a8 570 return PAGE0; /* Page0 valid */
mega64 0:bbe849f641a8 571 }
mega64 0:bbe849f641a8 572 }
mega64 0:bbe849f641a8 573
mega64 0:bbe849f641a8 574 /**
mega64 0:bbe849f641a8 575 * @brief Verify if active page is full and Writes variable in EEPROM.
mega64 0:bbe849f641a8 576 * @param VirtAddress: 16 bit virtual address of the variable
mega64 0:bbe849f641a8 577 * @param Data: 16 bit data to be written as variable value
mega64 0:bbe849f641a8 578 * @retval Success or error status:
mega64 0:bbe849f641a8 579 * - FLASH_COMPLETE: on success
mega64 0:bbe849f641a8 580 * - PAGE_FULL: if valid page is full
mega64 0:bbe849f641a8 581 * - NO_VALID_PAGE: if no valid page was found
mega64 0:bbe849f641a8 582 * - Flash error code: on write Flash error
mega64 0:bbe849f641a8 583 */
mega64 0:bbe849f641a8 584 static uint16_t EE_VerifyPageFullWriteVariable(uint16_t VirtAddress, uint16_t Data)
mega64 0:bbe849f641a8 585 {
mega64 3:a51a1737b55d 586 HAL_StatusTypeDef flashstatus = HAL_OK;
mega64 3:a51a1737b55d 587 uint16_t validpage = PAGE0;
mega64 3:a51a1737b55d 588 uint32_t address = EEPROM_START_ADDRESS, pageendaddress = EEPROM_START_ADDRESS+PAGE_SIZE;
mega64 0:bbe849f641a8 589
mega64 0:bbe849f641a8 590 /* Get valid Page for write operation */
mega64 3:a51a1737b55d 591 validpage = EE_FindValidPage(WRITE_IN_VALID_PAGE);
mega64 0:bbe849f641a8 592
mega64 0:bbe849f641a8 593 /* Check if there is no valid page */
mega64 3:a51a1737b55d 594 if (validpage == NO_VALID_PAGE)
mega64 0:bbe849f641a8 595 {
mega64 0:bbe849f641a8 596 return NO_VALID_PAGE;
mega64 0:bbe849f641a8 597 }
mega64 0:bbe849f641a8 598
mega64 3:a51a1737b55d 599 /* Get the valid Page start address */
mega64 3:a51a1737b55d 600 address = (uint32_t)(EEPROM_START_ADDRESS + (uint32_t)(validpage * PAGE_SIZE));
mega64 0:bbe849f641a8 601
mega64 3:a51a1737b55d 602 /* Get the valid Page end address */
mega64 3:a51a1737b55d 603 pageendaddress = (uint32_t)((EEPROM_START_ADDRESS - 1) + (uint32_t)((validpage + 1) * PAGE_SIZE));
mega64 0:bbe849f641a8 604
mega64 0:bbe849f641a8 605 /* Check each active page address starting from begining */
mega64 3:a51a1737b55d 606 while (address < pageendaddress)
mega64 0:bbe849f641a8 607 {
mega64 3:a51a1737b55d 608 /* Verify if address and address+2 contents are 0xFFFFFFFF */
mega64 3:a51a1737b55d 609 if ((*(__IO uint32_t*)address) == 0xFFFFFFFF)
mega64 0:bbe849f641a8 610 {
mega64 0:bbe849f641a8 611 /* Set variable data */
mega64 3:a51a1737b55d 612 flashstatus = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, address, Data);
mega64 0:bbe849f641a8 613 /* If program operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 614 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 615 {
mega64 3:a51a1737b55d 616 return flashstatus;
mega64 0:bbe849f641a8 617 }
mega64 0:bbe849f641a8 618 /* Set variable virtual address */
mega64 3:a51a1737b55d 619 flashstatus = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, address + 2, VirtAddress);
mega64 0:bbe849f641a8 620 /* Return program operation status */
mega64 3:a51a1737b55d 621 return flashstatus;
mega64 0:bbe849f641a8 622 }
mega64 0:bbe849f641a8 623 else
mega64 0:bbe849f641a8 624 {
mega64 0:bbe849f641a8 625 /* Next address location */
mega64 3:a51a1737b55d 626 address = address + 4;
mega64 0:bbe849f641a8 627 }
mega64 0:bbe849f641a8 628 }
mega64 0:bbe849f641a8 629
mega64 0:bbe849f641a8 630 /* Return PAGE_FULL in case the valid page is full */
mega64 0:bbe849f641a8 631 return PAGE_FULL;
mega64 0:bbe849f641a8 632 }
mega64 0:bbe849f641a8 633
mega64 0:bbe849f641a8 634 /**
mega64 0:bbe849f641a8 635 * @brief Transfers last updated variables data from the full Page to
mega64 0:bbe849f641a8 636 * an empty one.
mega64 0:bbe849f641a8 637 * @param VirtAddress: 16 bit virtual address of the variable
mega64 0:bbe849f641a8 638 * @param Data: 16 bit data to be written as variable value
mega64 0:bbe849f641a8 639 * @retval Success or error status:
mega64 0:bbe849f641a8 640 * - FLASH_COMPLETE: on success
mega64 0:bbe849f641a8 641 * - PAGE_FULL: if valid page is full
mega64 0:bbe849f641a8 642 * - NO_VALID_PAGE: if no valid page was found
mega64 0:bbe849f641a8 643 * - Flash error code: on write Flash error
mega64 0:bbe849f641a8 644 */
mega64 0:bbe849f641a8 645 static uint16_t EE_PageTransfer(uint16_t VirtAddress, uint16_t Data)
mega64 0:bbe849f641a8 646 {
mega64 3:a51a1737b55d 647 HAL_StatusTypeDef flashstatus = HAL_OK;
mega64 3:a51a1737b55d 648 uint32_t newpageaddress = EEPROM_START_ADDRESS;
mega64 3:a51a1737b55d 649 uint32_t oldpageid = 0;
mega64 3:a51a1737b55d 650 uint16_t validpage = PAGE0, varidx = 0;
mega64 3:a51a1737b55d 651 uint16_t eepromstatus = 0, readstatus = 0;
mega64 3:a51a1737b55d 652 uint32_t page_error = 0;
mega64 3:a51a1737b55d 653 FLASH_EraseInitTypeDef s_eraseinit;
mega64 0:bbe849f641a8 654
mega64 0:bbe849f641a8 655 /* Get active Page for read operation */
mega64 3:a51a1737b55d 656 validpage = EE_FindValidPage(READ_FROM_VALID_PAGE);
mega64 0:bbe849f641a8 657
mega64 3:a51a1737b55d 658 if (validpage == PAGE1) /* Page1 valid */
mega64 0:bbe849f641a8 659 {
mega64 0:bbe849f641a8 660 /* New page address where variable will be moved to */
mega64 3:a51a1737b55d 661 newpageaddress = PAGE0_BASE_ADDRESS;
mega64 0:bbe849f641a8 662
mega64 0:bbe849f641a8 663 /* Old page ID where variable will be taken from */
mega64 3:a51a1737b55d 664 oldpageid = PAGE1_BASE_ADDRESS;
mega64 0:bbe849f641a8 665 }
mega64 3:a51a1737b55d 666 else if (validpage == PAGE0) /* Page0 valid */
mega64 0:bbe849f641a8 667 {
mega64 0:bbe849f641a8 668 /* New page address where variable will be moved to */
mega64 3:a51a1737b55d 669 newpageaddress = PAGE1_BASE_ADDRESS;
mega64 0:bbe849f641a8 670
mega64 0:bbe849f641a8 671 /* Old page ID where variable will be taken from */
mega64 3:a51a1737b55d 672 oldpageid = PAGE0_BASE_ADDRESS;
mega64 0:bbe849f641a8 673 }
mega64 0:bbe849f641a8 674 else
mega64 0:bbe849f641a8 675 {
mega64 0:bbe849f641a8 676 return NO_VALID_PAGE; /* No valid Page */
mega64 0:bbe849f641a8 677 }
mega64 0:bbe849f641a8 678
mega64 0:bbe849f641a8 679 /* Set the new Page status to RECEIVE_DATA status */
mega64 3:a51a1737b55d 680 flashstatus = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, newpageaddress, RECEIVE_DATA);
mega64 0:bbe849f641a8 681 /* If program operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 682 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 683 {
mega64 3:a51a1737b55d 684 return flashstatus;
mega64 0:bbe849f641a8 685 }
mega64 0:bbe849f641a8 686
mega64 0:bbe849f641a8 687 /* Write the variable passed as parameter in the new active page */
mega64 3:a51a1737b55d 688 eepromstatus = EE_VerifyPageFullWriteVariable(VirtAddress, Data);
mega64 0:bbe849f641a8 689 /* If program operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 690 if (eepromstatus != HAL_OK)
mega64 0:bbe849f641a8 691 {
mega64 3:a51a1737b55d 692 return eepromstatus;
mega64 0:bbe849f641a8 693 }
mega64 0:bbe849f641a8 694
mega64 0:bbe849f641a8 695 /* Transfer process: transfer variables from old to the new active page */
mega64 3:a51a1737b55d 696 for (varidx = 0; varidx < NB_OF_VAR; varidx++)
mega64 0:bbe849f641a8 697 {
mega64 3:a51a1737b55d 698 if (VirtAddVarTab[varidx] != VirtAddress) /* Check each variable except the one passed as parameter */
mega64 0:bbe849f641a8 699 {
mega64 0:bbe849f641a8 700 /* Read the other last variable updates */
mega64 3:a51a1737b55d 701 readstatus = EE_ReadVariable(VirtAddVarTab[varidx], &DataVar);
mega64 0:bbe849f641a8 702 /* In case variable corresponding to the virtual address was found */
mega64 3:a51a1737b55d 703 if (readstatus != 0x1)
mega64 0:bbe849f641a8 704 {
mega64 0:bbe849f641a8 705 /* Transfer the variable to the new active page */
mega64 3:a51a1737b55d 706 eepromstatus = EE_VerifyPageFullWriteVariable(VirtAddVarTab[varidx], DataVar);
mega64 0:bbe849f641a8 707 /* If program operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 708 if (eepromstatus != HAL_OK)
mega64 0:bbe849f641a8 709 {
mega64 3:a51a1737b55d 710 return eepromstatus;
mega64 0:bbe849f641a8 711 }
mega64 0:bbe849f641a8 712 }
mega64 0:bbe849f641a8 713 }
mega64 0:bbe849f641a8 714 }
mega64 0:bbe849f641a8 715
mega64 3:a51a1737b55d 716 s_eraseinit.TypeErase = FLASH_TYPEERASE_PAGES;
mega64 3:a51a1737b55d 717 s_eraseinit.PageAddress = oldpageid;
mega64 6:669ff12928f9 718 s_eraseinit.NbPages = PAGE_NB_PVP;
mega64 0:bbe849f641a8 719
mega64 0:bbe849f641a8 720 /* Erase the old Page: Set old Page status to ERASED status */
mega64 3:a51a1737b55d 721 flashstatus = HAL_FLASHEx_Erase(&s_eraseinit, &page_error);
mega64 0:bbe849f641a8 722 /* If erase operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 723 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 724 {
mega64 3:a51a1737b55d 725 return flashstatus;
mega64 0:bbe849f641a8 726 }
mega64 0:bbe849f641a8 727
mega64 0:bbe849f641a8 728 /* Set new Page status to VALID_PAGE status */
mega64 3:a51a1737b55d 729 flashstatus = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, newpageaddress, VALID_PAGE);
mega64 0:bbe849f641a8 730 /* If program operation was failed, a Flash error code is returned */
mega64 3:a51a1737b55d 731 if (flashstatus != HAL_OK)
mega64 0:bbe849f641a8 732 {
mega64 3:a51a1737b55d 733 return flashstatus;
mega64 0:bbe849f641a8 734 }
mega64 3:a51a1737b55d 735
mega64 3:a51a1737b55d 736
mega64 0:bbe849f641a8 737
mega64 0:bbe849f641a8 738 /* Return last operation flash status */
mega64 3:a51a1737b55d 739 return flashstatus;
mega64 0:bbe849f641a8 740 }
mega64 0:bbe849f641a8 741
mega64 0:bbe849f641a8 742 /**
mega64 0:bbe849f641a8 743 * @}
mega64 0:bbe849f641a8 744 */
mega64 0:bbe849f641a8 745
mega64 3:a51a1737b55d 746 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/