8 years, 5 months ago.

EEPROM Problem again?

Hello Bernard,

Some time ago i had problems with Atmel AT24C512 eeprom, and i could resolve them with your library, It was working like a charm.

For few days, i started to experince the problems again. I prepared a below sample code, but can't get the saved value from eeprom register. This library was working a week ago, Do you also experince problems? May be because of last mbed update?

My eeprom connections are valid: SDA - SDA, SCL - SCL, WP - Ground, AO,A1,NC,GND - GND, VCC - 3.3V, 2K2 resistors on SDA and SCL line,

My board is STM32F401RE Nucleo.

#include "mbed.h"
#include "eeprom.h"

//  EEPROM Adress
//#define     EEPROM_ADDRESS                      0x50    // EEPROM (AT24C512) address
EEPROM eeprom(I2C_SDA, I2C_SCL, 0, EEPROM::T24C512);
Serial pc(USBTX, USBRX);

int main()
{

    pc.printf("Hello\r\n");
    
    uint32_t eeprom_adrr = 0;
    int16_t data = 111;
    int16_t res=0;
    
    eeprom.write(eeprom_adrr, data);
    wait_ms(5);
    
    eeprom.read(eeprom_adrr, res);
    
    pc.printf("%d", res);

}

I had quick look your sample code in your header file. But how can i convert uint_32t, uint16_t, uint8_t, type variables read from eeprom to send a string in scanf?

I mean %d for uint32_t? %hhd for uint8_t?

Thanks and regards....

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Last updated: 21 Dec 2015

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bernard borredon / eeprom

I2C EEPROM library from 24C01 to 24C1025