Tengo algunas dificultades para usar la biblioteca EEPROM emulada de STM32 para un microcontrolador STM32F4. Casi siempre recupero un PGPERR y un PGSERR cuando intento escribir en el flash. PGSERR parece estar configurado debido a un paralelismo incorrecto elegido. Cuando verifico el registro FLASH- > CR- > PSIZE veo a veces un 0x0 y otras veces un 0x1 y un 0x2, así que no puedo cambiarlo en absoluto, y también con 0x2 parece que todavía se debe devolver un PGSERR. También intenté una inicialización del registro en sí, pero esto me lanzó una falla cuando llamé a un sprintf en ese momento.
También cambié de 16kByte Pages a 128kByte pages, esto ya no produce un error cuando llamo a sprintf (), pero parece que no guardo ninguna variable en absoluto en la EEPROM.
¿Alguien tiene una idea de por qué ocurren estos errores?
EDIT 1: Cuando configuro PSIZE en 0x2 para páginas de 128 kBytes, ya no obtengo un PGPERR, sino un PGSERR. Utilicé los siguientes commads para escribir PSIZE:
FLASH->CR&=~((1<<FLASH_CR_PSIZE_0)|(1<<FLASH_CR_PSIZE_1));
FLASH->CR|=(1<<FLASH_CR_PSIZE_1);
Lo que además veo es que el registro FLASH- > CR se mantiene a veces solo en 0x0.
Hoja de datos: (Página 75 para mapeo de memoria Flash) enlace
eeprom.h:
/**
******************************************************************************
* @file EEPROM/EEPROM_Emulation/inc/eeprom.h
* @author MCD Application Team
* @brief This file contains all the functions prototypes for the EEPROM
* emulation firmware library.
******************************************************************************
* @attention
*
* <h2><center>© Copyright (c) 2017 STMicroelectronics International N.V.
* All rights reserved.</center></h2>
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*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __EEPROM_H
#define __EEPROM_H
/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_hal.h"
/* Exported constants --------------------------------------------------------*/
/* EEPROM emulation firmware error codes */
#define EE_OK (uint32_t)HAL_OK
#define EE_ERROR (uint32_t)HAL_ERROR
#define EE_BUSY (uint32_t)HAL_BUSY
#define EE_TIMEOUT (uint32_t)HAL_TIMEOUT
/* Base address of the Flash sectors */
#define ADDR_FLASH_PAGE_0 ((uint32_t)0x08020000 ) /* Base @ of Page 0, 16Kbytes @sector 2*/
#define ADDR_FLASH_PAGE_1 ((uint32_t)0x08040000) /* Base @ of Page 1, 16Kbytes @sector 3*/
/* Define the size of the sectors to be used */
#define PAGE_SIZE (uint32_t)0x20000 /* Page size = 128KByte */
/* Device voltage range supposed to be [2.7V to 3.6V], the operation will
be done by word */
#define VOLTAGE_RANGE (uint8_t)VOLTAGE_RANGE_3
/* EEPROM start address in Flash */
#define EEPROM_START_ADDRESS ((uint32_t)ADDR_FLASH_PAGE_0) /* EEPROM emulation start address:
from sector2 : after 32KByte of used
Flash memory */
/* Pages 0 and 1 base and end addresses */
#define PAGE0_BASE_ADDRESS ((uint32_t)(EEPROM_START_ADDRESS + 0x0000)) //See Reference Manual for Flash Sectors
#define PAGE0_END_ADDRESS ((uint32_t)(EEPROM_START_ADDRESS + (PAGE_SIZE - 1)))
#define PAGE0_ID FLASH_SECTOR_5
#define PAGE1_BASE_ADDRESS ((uint32_t)(ADDR_FLASH_PAGE_1))
#define PAGE1_END_ADDRESS ((uint32_t)(ADDR_FLASH_PAGE_1 + (PAGE_SIZE - 1)))
#define PAGE1_ID FLASH_SECTOR_6
/* Used Flash pages for EEPROM emulation */
#define PAGE0 ((uint16_t)0x0000)
#define PAGE1 ((uint16_t)0x0001) /* Page nb between PAGE0_BASE_ADDRESS & PAGE1_BASE_ADDRESS*/
/* No valid page define */
#define NO_VALID_PAGE ((uint16_t)0x00AB)
/* Page status definitions */
#define ERASED ((uint16_t)0xFFFF) /* Page is empty */
#define RECEIVE_DATA ((uint16_t)0xEEEE) /* Page is marked to receive data */
#define VALID_PAGE ((uint16_t)0x0000) /* Page containing valid data */
/* Valid pages in read and write defines */
#define READ_FROM_VALID_PAGE ((uint8_t)0x00)
#define WRITE_IN_VALID_PAGE ((uint8_t)0x01)
/* Page full define */
#define PAGE_FULL ((uint8_t)0x80)
/* Variables' number */
#define NB_OF_VAR ((uint8_t)32)
/* Exported types ------------------------------------------------------------*/
/* Exported macro ------------------------------------------------------------*/
/* Exported functions ------------------------------------------------------- */
uint16_t EE_Init(void);
uint16_t EE_ReadVariable(uint16_t VirtAddress, uint16_t* Data);
uint16_t EE_WriteVariable(uint16_t VirtAddress, uint16_t Data);
#endif /* __EEPROM_H */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
eeprom.c / EE_VerifyPageFullWriteVariable - > Cambié en todas partes en eeprom.c de TYPEPROGRAM_HALFWORD a TYPEPROGRAM_WORD
static uint16_t EE_VerifyPageFullWriteVariable(uint16_t VirtAddress, uint16_t Data)
{
HAL_StatusTypeDef FlashStatus = HAL_OK;
uint16_t ValidPage = PAGE0;
uint32_t Address = EEPROM_START_ADDRESS, PageEndAddress = EEPROM_START_ADDRESS+PAGE_SIZE;
/* Get valid Page for write operation */
ValidPage = EE_FindValidPage(WRITE_IN_VALID_PAGE);
/* Check if there is no valid page */
if (ValidPage == NO_VALID_PAGE)
{
return NO_VALID_PAGE;
}
/* Get the valid Page start Address */
Address = (uint32_t)(EEPROM_START_ADDRESS + (uint32_t)(ValidPage * PAGE_SIZE));
/* Get the valid Page end Address */
PageEndAddress = (uint32_t)((EEPROM_START_ADDRESS - 1) + (uint32_t)((ValidPage + 1) * PAGE_SIZE));
/* Check each active page address starting from begining */
while (Address < PageEndAddress)
{
/* Verify if Address and Address+2 contents are 0xFFFFFFFF */
if ((*(__IO uint32_t*)Address) == 0xFFFFFFFF)
{
/* Set variable data */
FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_WORD, Address, Data);
/* If program operation was failed, a Flash error code is returned */
if (FlashStatus != HAL_OK)
{
return FlashStatus;
}
/* Set variable virtual address */
FlashStatus = HAL_FLASH_Program(TYPEPROGRAM_WORD, Address + 2, VirtAddress);
/* Return program operation status */
return FlashStatus;
}
else
{
/* Next address location */
Address = Address + 4;
}
}
/* Return PAGE_FULL in case the valid page is full */
return PAGE_FULL;
}