Store data time and settings on eeprom

[cnandha19]

    int datetime[5];

    unsinged char lanugage;
 
    void main()
   {
    eeprom_value = 0;
	
	
   spi_eeprom_Write(0x0000,&eeprom_value,sizeof(eeprom_value));
					
   Initialsetup = intilize_initialsetup(Initialsetup);
					
  lcdClear();
  spi_eeprom_Write(0x0001,&Initialsetup.language,sizeof(Initialsetup.language));
  Initialsetup.ChoiceOfLanguage =  spi_eeprom_Read(0x0001);               
     //to store language  how to check whether this setting is stored on not and after turn off and on microcontroller how it will retain 
					
					if(strcmp(Initialsetup.units,Get_Unitsmeterstrings(Initialsetup.ChoiceOfLanguage))==0)
					{
						eeprom_value = 1;
						spi_eeprom_Write(0x0002,&eeprom_value,sizeof(eeprom_value));
					}
					
					if(strcmp(Initialsetup.units,Get_Unitsfeetstrings(Initialsetup.ChoiceOfLanguage))==0)
					{
						eeprom_value = 0;
						spi_eeprom_Write(0x0002,&eeprom_value,sizeof(eeprom_value));
					}
					settime(Initialsetup.datetime[3],Initialsetup.datetime[4]);
					setdate(Initialsetup.datetime[2], Initialsetup.datetime[1], Initialsetup.datetime[0]);
					spi_eeprom_Write(0x0003,Initialsetup.password,sizeof(Initialsetup.password));
				}

I am storing values on eeprom how to check whether this setting is stored on not and after turn off and on microcontroller how it will retain

 

[KlausST]

Hi,

I am storing values on eeprom how to check whether this setting is stored on not and after turn off and on microcontroller how it will retain

How to check:
Immediately after you have written the EEPROM cells read them back to verify its contents.

how it will retain:
EEPROM is non volatile memory. It needs no power to keep the contents.
In your software you need a routine to read back the EEPROM values.

**
Hint:
Consider to use something like a checksum or CRC with your EEPROM data, then you are able to check validity of the EEPROM contents after power up.

Klaus

 

[cnandha19]

Is it correct to write and read to select Language as English in menu drive i have to write "ENGLISH" to EEPROM for that i had done below is it right way to write name and read it on default ascii

   char store_value;
	unsigned char eeprom_value = 0;
	
    char defaultascii[5];
    char name[10] ={"English"};
	sysclk_init();
	irq_initialize_vectors();
	cpu_irq_enable();
	AT25160B_init();     // SPI  initialization
	initLcd();
	
	lcdClear();
	
	lcdMoveCursor(0,0);
	
	lcdPrintStr("EEPROM TEST");
	
	eeprom_value = 0;
	
	eeprom_value = spi_eeprom_Read(0x0000);
	
	if(eeprom_value != 1)
	{
		spi_eeprom_Write(0x0003, name, sizeof(name));
	}
	
	defaultascii[0] = spi_eeprom_Read(0x0003);
	defaultascii[1] = spi_eeprom_Read(0x0004);
	defaultascii[2] = spi_eeprom_Read(0x0005);
	defaultascii[3] = spi_eeprom_Read(0x0006);
	defaultascii[4] = spi_eeprom_Read(0x0007);
	defaultascii[5] = spi_eeprom_Read(0x0008);	
	
	
	lcdMoveCursor(1,2);
	
	lcdPrintChar(defaultascii[0]);
	
	lcdMoveCursor(1,3);
	
	lcdPrintChar(defaultascii[1]);
	
	lcdMoveCursor(1,4);
	
	lcdPrintChar(defaultascii[2]);
	
	lcdMoveCursor(1,5);
	
	lcdPrintChar(defaultascii[3]);
	
	lcdMoveCursor(1,6);
	
	lcdPrintChar(defaultascii[4]);
	
	lcdMoveCursor(1,7);
	
	lcdPrintChar(defaultascii[5]);
	
	delay_ms(1000);

	
	
}

 

[KlausST]

Hi,

What data you store in the EEPROM is completely up to you.

You may store ASCII characters as string like "English".
or you may choose a single byte variable. Where you decide the function upon it´s value. Then 0x00 could represent english language and 0x01 could represent spanish language.

Klaus

 

[cnandha19]

if((keyvalue==ENTER)&&(status == 0))
		{
			delay_ms(100);
			
			Initialsetup.datetime[0] = Initialsetup.value_store;
			
			Initialsetup.datetime[0] = Initialsetup.datetime[0] % 100;
			spi_eeprom_Write(0x0022,&Initialsetup.datetime[0],sizeof(Initialsetup.datetime[0]));
			year= Initialsetup.datetime[0];
			
			
			
			
			lcdClear();
			lcdMoveCursor(1,5);
			lcdPrintStr("OK");
			delay_ms(5000);
			read_value = spi_eeprom_Read(0x0022);
			lcdClear();
			lcdMoveCursor(1,5);
		       print_integer(read_value);
			
			delay_ms(5000);

If i read this value means i am getting '0' in LCD display instead of year 2014