stm32temp: eeprom.c annotate

author	Daniel O'Connor <darius@dons.net.au>
date	Mon, 22 Apr 2013 23:17:40 +0930
parents
children	7dd28b96a716

rev	line source
76 f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	1 /**
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	2 ******************************************************************************
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	3 * @file EEPROM_Emulation/src/eeprom.c
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	4 * @author MCD Application Team
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	5 * @version V3.1.0
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	6 * @date 07/27/2009
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	7 * @brief This file provides all the EEPROM emulation firmware functions.
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	8 ******************************************************************************
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	9 * @copy
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	10 *
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	11 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	12 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	13 * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	14 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	15 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	16 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	17 *
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	18 * <h2><center>© COPYRIGHT 2009 STMicroelectronics</center></h2>
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	19 */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	20 /** @addtogroup EEPROM_Emulation
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	21 * @{
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	22 */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	23
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	24 /* Includes ------------------------------------------------------------------*/
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	25 #include <stdio.h>
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	26 #include <stdlib.h>
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	27 #include <string.h>
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	28 #include "eeprom.h"
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	29
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	30 /* Private typedef -----------------------------------------------------------*/
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	31 /* Private define ------------------------------------------------------------*/
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	32 /* Private macro -------------------------------------------------------------*/
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	33 /* Private variables ---------------------------------------------------------*/
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	34
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	35 /* Global variable used to store variable value in read sequence */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	36 uint16_t DataVar = 0;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	37
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	38 /* Virtual address defined by the user: 0xFFFF value is prohibited */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	39 const uint16_t VirtAddVarTab[NumbOfVar] = { 1000, 1001, 1002 };
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	40
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	41 /* Private function prototypes -----------------------------------------------*/
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	42 /* Private functions ---------------------------------------------------------*/
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	43 static uint16_t EE_FindValidPage(uint8_t Operation);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	44 static uint16_t EE_VerifyPageFullWriteVariable(uint16_t VirtAddress, uint16_t Data);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	45 static uint16_t EE_PageTransfer(uint16_t VirtAddress, uint16_t Data);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	46
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	47 /**
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	48 * @brief Restore the pages to a known good state in case of page's status
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	49 * corruption after a power loss.
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	50 * @param None.
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	51 * @retval - Flash error code: on write Flash error
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	52 * - FLASH_COMPLETE: on success
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	53 */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	54 uint16_t EE_Init(void)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	55 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	56 uint16_t PageStatus0 = 6, PageStatus1 = 6;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	57 uint16_t VarIdx = 0;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	58 uint16_t EepromStatus = 0, ReadStatus = 0;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	59 int16_t x = -1;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	60 uint16_t FlashStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	61
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	62 /* Get Page0 status */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	63 PageStatus0 = (__IO uint16_t)PAGE0_BASE_ADDRESS;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	64 /* Get Page1 status */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	65 PageStatus1 = (__IO uint16_t)PAGE1_BASE_ADDRESS;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	66
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	67 /* Check for invalid header states and repair if necessary */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	68 switch (PageStatus0)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	69 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	70 case ERASED:
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	71 if (PageStatus1 == VALID_PAGE) /* Page0 erased, Page1 valid */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	72 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	73 /* Erase Page0 */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	74 FlashStatus = FLASH_ErasePage(PAGE0_BASE_ADDRESS);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	75 /* If erase operation was failed, a Flash error code is returned */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	76 if (FlashStatus != FLASH_COMPLETE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	77 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	78 return FlashStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	79 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	80 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	81 else if (PageStatus1 == RECEIVE_DATA) /* Page0 erased, Page1 receive */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	82 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	83 /* Erase Page0 */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	84 FlashStatus = FLASH_ErasePage(PAGE0_BASE_ADDRESS);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	85 /* If erase operation was failed, a Flash error code is returned */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	86 if (FlashStatus != FLASH_COMPLETE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	87 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	88 return FlashStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	89 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	90 /* Mark Page1 as valid */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	91 FlashStatus = FLASH_ProgramHalfWord(PAGE1_BASE_ADDRESS, VALID_PAGE);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	92 /* If program operation was failed, a Flash error code is returned */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	93 if (FlashStatus != FLASH_COMPLETE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	94 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	95 return FlashStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	96 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	97 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	98 else /* First EEPROM access (Page0&1 are erased) or invalid state -> format EEPROM */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	99 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	100 /* Erase both Page0 and Page1 and set Page0 as valid page */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	101 FlashStatus = EE_Format();
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	102 /* If erase/program operation was failed, a Flash error code is returned */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	103 if (FlashStatus != FLASH_COMPLETE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	104 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	105 return FlashStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	106 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	107 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	108 break;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	109
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	110 case RECEIVE_DATA:
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	111 if (PageStatus1 == VALID_PAGE) /* Page0 receive, Page1 valid */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	112 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	113 /* Transfer data from Page1 to Page0 */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	114 for (VarIdx = 0; VarIdx < NumbOfVar; VarIdx++)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	115 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	116 if (( (__IO uint16_t)(PAGE0_BASE_ADDRESS + 6)) == VirtAddVarTab[VarIdx])
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	117 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	118 x = VarIdx;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	119 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	120 if (VarIdx != x)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	121 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	122 /* Read the last variables' updates */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	123 ReadStatus = EE_ReadVariable(VirtAddVarTab[VarIdx], &DataVar);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	124 /* In case variable corresponding to the virtual address was found */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	125 if (ReadStatus != 0x1)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	126 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	127 /* Transfer the variable to the Page0 */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	128 EepromStatus = EE_VerifyPageFullWriteVariable(VirtAddVarTab[VarIdx], DataVar);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	129 /* If program operation was failed, a Flash error code is returned */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	130 if (EepromStatus != FLASH_COMPLETE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	131 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	132 return EepromStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	133 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	134 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	135 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	136 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	137 /* Mark Page0 as valid */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	138 FlashStatus = FLASH_ProgramHalfWord(PAGE0_BASE_ADDRESS, VALID_PAGE);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	139 /* If program operation was failed, a Flash error code is returned */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	140 if (FlashStatus != FLASH_COMPLETE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	141 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	142 return FlashStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	143 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	144 /* Erase Page1 */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	145 FlashStatus = FLASH_ErasePage(PAGE1_BASE_ADDRESS);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	146 /* If erase operation was failed, a Flash error code is returned */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	147 if (FlashStatus != FLASH_COMPLETE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	148 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	149 return FlashStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	150 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	151 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	152 else if (PageStatus1 == ERASED) /* Page0 receive, Page1 erased */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	153 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	154 /* Erase Page1 */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	155 FlashStatus = FLASH_ErasePage(PAGE1_BASE_ADDRESS);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	156 /* If erase operation was failed, a Flash error code is returned */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	157 if (FlashStatus != FLASH_COMPLETE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	158 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	159 return FlashStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	160 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	161 /* Mark Page0 as valid */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	162 FlashStatus = FLASH_ProgramHalfWord(PAGE0_BASE_ADDRESS, VALID_PAGE);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	163 /* If program operation was failed, a Flash error code is returned */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	164 if (FlashStatus != FLASH_COMPLETE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	165 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	166 return FlashStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	167 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	168 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	169 else /* Invalid state -> format eeprom */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	170 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	171 /* Erase both Page0 and Page1 and set Page0 as valid page */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	172 FlashStatus = EE_Format();
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	173 /* If erase/program operation was failed, a Flash error code is returned */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	174 if (FlashStatus != FLASH_COMPLETE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	175 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	176 return FlashStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	177 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	178 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	179 break;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	180
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	181 case VALID_PAGE:
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	182 if (PageStatus1 == VALID_PAGE) /* Invalid state -> format eeprom */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	183 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	184 /* Erase both Page0 and Page1 and set Page0 as valid page */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	185 FlashStatus = EE_Format();
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	186 /* If erase/program operation was failed, a Flash error code is returned */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	187 if (FlashStatus != FLASH_COMPLETE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	188 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	189 return FlashStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	190 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	191 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	192 else if (PageStatus1 == ERASED) /* Page0 valid, Page1 erased */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	193 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	194 /* Erase Page1 */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	195 FlashStatus = FLASH_ErasePage(PAGE1_BASE_ADDRESS);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	196 /* If erase operation was failed, a Flash error code is returned */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	197 if (FlashStatus != FLASH_COMPLETE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	198 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	199 return FlashStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	200 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	201 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	202 else /* Page0 valid, Page1 receive */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	203 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	204 /* Transfer data from Page0 to Page1 */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	205 for (VarIdx = 0; VarIdx < NumbOfVar; VarIdx++)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	206 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	207 if (((__IO uint16_t)(PAGE1_BASE_ADDRESS + 6)) == VirtAddVarTab[VarIdx])
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	208 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	209 x = VarIdx;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	210 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	211 if (VarIdx != x)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	212 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	213 /* Read the last variables' updates */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	214 ReadStatus = EE_ReadVariable(VirtAddVarTab[VarIdx], &DataVar);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	215 /* In case variable corresponding to the virtual address was found */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	216 if (ReadStatus != 0x1)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	217 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	218 /* Transfer the variable to the Page1 */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	219 EepromStatus = EE_VerifyPageFullWriteVariable(VirtAddVarTab[VarIdx], DataVar);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	220 /* If program operation was failed, a Flash error code is returned */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	221 if (EepromStatus != FLASH_COMPLETE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	222 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	223 return EepromStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	224 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	225 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	226 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	227 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	228 /* Mark Page1 as valid */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	229 FlashStatus = FLASH_ProgramHalfWord(PAGE1_BASE_ADDRESS, VALID_PAGE);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	230 /* If program operation was failed, a Flash error code is returned */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	231 if (FlashStatus != FLASH_COMPLETE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	232 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	233 return FlashStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	234 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	235 /* Erase Page0 */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	236 FlashStatus = FLASH_ErasePage(PAGE0_BASE_ADDRESS);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	237 /* If erase operation was failed, a Flash error code is returned */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	238 if (FlashStatus != FLASH_COMPLETE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	239 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	240 return FlashStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	241 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	242 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	243 break;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	244
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	245 default: /* Any other state -> format eeprom */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	246 /* Erase both Page0 and Page1 and set Page0 as valid page */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	247 FlashStatus = EE_Format();
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	248 /* If erase/program operation was failed, a Flash error code is returned */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	249 if (FlashStatus != FLASH_COMPLETE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	250 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	251 return FlashStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	252 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	253 break;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	254 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	255
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	256 return FLASH_COMPLETE;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	257 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	258
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	259 /**
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	260 * @brief Returns the last stored variable data, if found, which correspond to
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	261 * the passed virtual address
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	262 * @param VirtAddress: Variable virtual address
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	263 * @param Data: Global variable contains the read variable value
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	264 * @retval Success or error status:
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	265 * - 0: if variable was found
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	266 * - 1: if the variable was not found
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	267 * - NO_VALID_PAGE: if no valid page was found.
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	268 */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	269 uint16_t EE_ReadVariable(uint16_t VirtAddress, uint16_t* Data)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	270 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	271 uint16_t ValidPage = PAGE0;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	272 uint16_t AddressValue = 0x5555, ReadStatus = 1;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	273 uint32_t Address = 0x08010000, PageStartAddress = 0x08010000;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	274
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	275 /* Get active Page for read operation */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	276 ValidPage = EE_FindValidPage(READ_FROM_VALID_PAGE);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	277
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	278 /* Check if there is no valid page */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	279 if (ValidPage == NO_VALID_PAGE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	280 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	281 return NO_VALID_PAGE;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	282 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	283
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	284 /* Get the valid Page start Address */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	285 PageStartAddress = (uint32_t)(EEPROM_START_ADDRESS + (uint32_t)(ValidPage * PAGE_SIZE));
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	286
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	287 /* Get the valid Page end Address */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	288 Address = (uint32_t)((EEPROM_START_ADDRESS - 2) + (uint32_t)((1 + ValidPage) * PAGE_SIZE));
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	289
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	290 /* Check each active page address starting from end */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	291 while (Address > (PageStartAddress + 2))
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	292 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	293 /* Get the current location content to be compared with virtual address */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	294 AddressValue = ((__IO uint16_t)Address);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	295
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	296 /* Compare the read address with the virtual address */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	297 if (AddressValue == VirtAddress)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	298 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	299 /* Get content of Address-2 which is variable value */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	300 Data = ((__IO uint16_t*)(Address - 2));
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	301
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	302 /* In case variable value is read, reset ReadStatus flag */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	303 ReadStatus = 0;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	304
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	305 break;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	306 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	307 else
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	308 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	309 /* Next address location */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	310 Address = Address - 4;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	311 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	312 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	313
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	314 /* Return ReadStatus value: (0: variable exist, 1: variable doesn't exist) */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	315 return ReadStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	316 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	317
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	318 /**
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	319 * @brief Writes/upadtes variable data in EEPROM.
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	320 * @param VirtAddress: Variable virtual address
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	321 * @param Data: 16 bit data to be written
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	322 * @retval Success or error status:
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	323 * - FLASH_COMPLETE: on success
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	324 * - PAGE_FULL: if valid page is full
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	325 * - NO_VALID_PAGE: if no valid page was found
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	326 * - Flash error code: on write Flash error
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	327 */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	328 uint16_t EE_WriteVariable(uint16_t VirtAddress, uint16_t Data)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	329 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	330 uint16_t Status = 0;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	331
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	332 /* Write the variable virtual address and value in the EEPROM */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	333 Status = EE_VerifyPageFullWriteVariable(VirtAddress, Data);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	334
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	335 /* In case the EEPROM active page is full */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	336 if (Status == PAGE_FULL)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	337 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	338 /* Perform Page transfer */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	339 Status = EE_PageTransfer(VirtAddress, Data);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	340 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	341
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	342 /* Return last operation status */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	343 return Status;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	344 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	345
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	346 /**
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	347 * @brief Erases PAGE0 and PAGE1 and writes VALID_PAGE header to PAGE0
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	348 * @param None
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	349 * @retval Status of the last operation (Flash write or erase) done during
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	350 * EEPROM formating
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	351 */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	352
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	353 FLASH_Status EE_Format(void)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	354 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	355 FLASH_Status FlashStatus = FLASH_COMPLETE;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	356
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	357 /* Erase Page0 */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	358 FlashStatus = FLASH_ErasePage(PAGE0_BASE_ADDRESS);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	359
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	360 /* If erase operation was failed, a Flash error code is returned */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	361 if (FlashStatus != FLASH_COMPLETE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	362 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	363 return FlashStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	364 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	365
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	366 /* Set Page0 as valid page: Write VALID_PAGE at Page0 base address */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	367 FlashStatus = FLASH_ProgramHalfWord(PAGE0_BASE_ADDRESS, VALID_PAGE);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	368
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	369 /* If program operation was failed, a Flash error code is returned */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	370 if (FlashStatus != FLASH_COMPLETE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	371 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	372 return FlashStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	373 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	374
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	375 /* Erase Page1 */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	376 FlashStatus = FLASH_ErasePage(PAGE1_BASE_ADDRESS);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	377
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	378 /* Return Page1 erase operation status */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	379 return FlashStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	380 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	381
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	382 /**
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	383 * @brief Find valid Page for write or read operation
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	384 * @param Operation: operation to achieve on the valid page.
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	385 * This parameter can be one of the following values:
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	386 * @arg READ_FROM_VALID_PAGE: read operation from valid page
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	387 * @arg WRITE_IN_VALID_PAGE: write operation from valid page
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	388 * @retval Valid page number (PAGE0 or PAGE1) or NO_VALID_PAGE in case
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	389 * of no valid page was found
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	390 */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	391 static uint16_t EE_FindValidPage(uint8_t Operation)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	392 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	393 uint16_t PageStatus0 = 6, PageStatus1 = 6;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	394
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	395 /* Get Page0 actual status */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	396 PageStatus0 = ((__IO uint16_t)PAGE0_BASE_ADDRESS);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	397
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	398 /* Get Page1 actual status */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	399 PageStatus1 = ((__IO uint16_t)PAGE1_BASE_ADDRESS);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	400
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	401 /* Write or read operation */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	402 switch (Operation)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	403 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	404 case WRITE_IN_VALID_PAGE: /* ---- Write operation ---- */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	405 if (PageStatus1 == VALID_PAGE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	406 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	407 /* Page0 receiving data */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	408 if (PageStatus0 == RECEIVE_DATA)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	409 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	410 return PAGE0; /* Page0 valid */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	411 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	412 else
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	413 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	414 return PAGE1; /* Page1 valid */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	415 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	416 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	417 else if (PageStatus0 == VALID_PAGE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	418 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	419 /* Page1 receiving data */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	420 if (PageStatus1 == RECEIVE_DATA)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	421 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	422 return PAGE1; /* Page1 valid */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	423 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	424 else
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	425 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	426 return PAGE0; /* Page0 valid */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	427 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	428 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	429 else
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	430 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	431 return NO_VALID_PAGE; /* No valid Page */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	432 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	433
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	434 case READ_FROM_VALID_PAGE: /* ---- Read operation ---- */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	435 if (PageStatus0 == VALID_PAGE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	436 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	437 return PAGE0; /* Page0 valid */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	438 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	439 else if (PageStatus1 == VALID_PAGE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	440 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	441 return PAGE1; /* Page1 valid */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	442 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	443 else
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	444 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	445 return NO_VALID_PAGE ; /* No valid Page */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	446 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	447
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	448 default:
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	449 return PAGE0; /* Page0 valid */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	450 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	451 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	452
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	453 /**
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	454 * @brief Verify if active page is full and Writes variable in EEPROM.
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	455 * @param VirtAddress: 16 bit virtual address of the variable
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	456 * @param Data: 16 bit data to be written as variable value
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	457 * @retval Success or error status:
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	458 * - FLASH_COMPLETE: on success
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	459 * - PAGE_FULL: if valid page is full
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	460 * - NO_VALID_PAGE: if no valid page was found
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	461 * - Flash error code: on write Flash error
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	462 */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	463 static uint16_t EE_VerifyPageFullWriteVariable(uint16_t VirtAddress, uint16_t Data)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	464 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	465 FLASH_Status FlashStatus = FLASH_COMPLETE;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	466 uint16_t ValidPage = PAGE0;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	467 uint32_t Address = 0x08010000, PageEndAddress = 0x080107FF;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	468
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	469 /* Get valid Page for write operation */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	470 ValidPage = EE_FindValidPage(WRITE_IN_VALID_PAGE);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	471
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	472 /* Check if there is no valid page */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	473 if (ValidPage == NO_VALID_PAGE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	474 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	475 return NO_VALID_PAGE;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	476 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	477
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	478 /* Get the valid Page start Address */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	479 Address = (uint32_t)(EEPROM_START_ADDRESS + (uint32_t)(ValidPage * PAGE_SIZE));
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	480
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	481 /* Get the valid Page end Address */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	482 PageEndAddress = (uint32_t)((EEPROM_START_ADDRESS - 2) + (uint32_t)((1 + ValidPage) * PAGE_SIZE));
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	483
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	484 /* Check each active page address starting from begining */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	485 while (Address < PageEndAddress)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	486 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	487 /* Verify if Address and Address+2 contents are 0xFFFFFFFF */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	488 if (((__IO uint32_t)Address) == 0xFFFFFFFF)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	489 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	490 /* Set variable data */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	491 FlashStatus = FLASH_ProgramHalfWord(Address, Data);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	492 /* If program operation was failed, a Flash error code is returned */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	493 if (FlashStatus != FLASH_COMPLETE)
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	494 {
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	495 return FlashStatus;
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	496 }
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	497 /* Set variable virtual address */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	498 FlashStatus = FLASH_ProgramHalfWord(Address + 2, VirtAddress);
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	499 /* Return program operation status */
f1c9a51e368a Add EEPROM emulation from AN2594. Daniel O'Connor <darius@dons.net.au> parents: diff changeset	500 return FlashStatus;

76

f1c9a51e368a Add EEPROM emulation from AN2594.