Use STM32F4 flash for non-volatile data storage (eeprom)

[syedhashmiraza]

hello i am using stm32f429i-disc1 microcontroller board in this how to generate flash code (eeprom)

---

Your other thread showed a major confusion between what is a "microcontroller", and what is a "board" - so edited for clarity.

[syedhashmiraza]

This code is not build on stm32f429i-disc1 and iam using stm32cube ide software

[Andrew Neil]

What do you mean?

[syedhashmiraza]

when i build this so many error are showing ?

[syedhashmiraza]

(merged from duplicate thread)

hello iam using srm32f429i-disc1 microcontroller board and i want refrence code for emulated eeprom 

[liaifat85]

I think you have to use the STM32 HAL library. 

[syedhashmiraza]

yes iam using HAL library

[syedhashmiraza]

hello iam using srm32f429i-disc1 microcontroller board and i want refrence code for emulated eeprom 

[syedhashmiraza]

this code is not build in stm32cubeide

[Andrew Neil]

The EEPROM emulation itself is just the eeprom.c & eeprom.h files.

The rest is just a "test harness" to demonstrate that.

So you should be able to:

1. Create a new Project in CubeIDE - make sure that builds as-is.
2. Copy the  eeprom.c & eeprom.h files into your project.
3. Copy the test code as text from main.c in the EEPROM GitHub, and paste it into the main.c in your own project.

[syedhashmiraza]

Hello,

I want to read and write string in eeprom  this is my code but in this code string is not storing in eeprom

#include "main.h"
#include <stdio.h>

/** @addtogroup EEPROM_Emulation
* @{
*/


/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/


/* Virtual address defined by the user: 0xFFFF value is prohibited */

uint16_t VirtAddVarTab[NB_OF_VAR] = {0x5555, 0x6666, 0x7777};

uint16_t VarDataTab[NB_OF_VAR] = {0, 0, 0};

uint16_t VarValue,VarDataTmp = 0;

/* Private function prototypes -----------------------------------------------*/
static void SystemClock_Config(void);
static void Error_Handler(void);

/* Private functions ---------------------------------------------------------*/

/**
* @brief Main program.
*  None
* @retval None
*/

//char writeString[] = "Hello Hashmi";
char readString[64]={0};


int main(void)
{
	/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
	HAL_Init();

	/* Configure the system clock to 180 MHz */
	SystemClock_Config();

	/* Unlock the Flash Program Erase controller */
	HAL_FLASH_Unlock();

	/* Configure LED3 */
	BSP_LED_Init(LED3);

	/* EEPROM Init */
	if( EE_Init() != EE_OK)
	{
		Error_Handler();
	}

	if((EE_ReadVariable(VirtAddVarTab[0], &readString[0])) != HAL_OK)
	{
		Error_Handler();
	}
	while(1)
	{
		char writeString[] = "Hello";
		for (int i = 0; i < sizeof(writeString); i++)
		{
			if (EE_WriteVariable(VirtAddVarTab[0] + i, (uint16_t*)&writeString[i]) != HAL_OK)
			{
				Error_Handler();
			}
		}
	}
}