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Problem with EEPROM read/write float custom routine

 
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xTeox



Joined: 27 Aug 2009
Posts: 10

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Problem with EEPROM read/write float custom routine
PostPosted: Wed Oct 07, 2009 2:02 pm     Reply with quote
Hi, everyone!
I'm with a problem... my routine doesn't work. It is only writing the first byte (but it access 4 times the loop 'for') and I don't know why. And, when tries to read, it return 0.
The routines:
Code:

float EEPROM_ler (int e, int tamanho)
    {
        int i;
        float dados;

        dados = 0;

        for (i = 0; i < tamanho; i++)
            *((int*) &dados + i) = read_eeprom (e + i);

        return dados;
    }

    ////////////////////////////////////////////////////////////////

    void EEPROM_gravar (int e, int32 dados, int tamanho)
    {
        int i;

        for (i = 0; i < tamanho; i++)
            write_eeprom (e + i, *((int*) &dados + i));
    }

I've tried to do the same with this alteration:

Code:
    float EEPROM_ler (int e)
    {
        float dados;
        int i;
        int* ptr = &dados;

        dados = 0;

        for (i = 0; i < 4; i++)
            *(ptr++) = read_eeprom (e++);

        return dados;
    }

    ////////////////////////////////////////////////////////////////

    void EEPROM_gravar (int e, int32 dados)
    {
        char i;
        int* ptr = &dados;

        for (i = 0; i < 4; i++)
            write_eeprom (e++, *(ptr++));
    }

But still the same!

PS.: it works with alterations to read/write long (int16).
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Oct 07, 2009 2:32 pm     Reply with quote
Look in this file for routines to do this:
Quote:
c:\program files\picc\drivers\internal_eeprom.c


Or look at this FAQ article:
http://www.ccsinfo.com/faq.php?page=write_eeprom_not_byte
xTeox



Joined: 27 Aug 2009
Posts: 10

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PostPosted: Wed Oct 07, 2009 2:33 pm     Reply with quote
huahuahuahuahuahuahu........ forget it!.... I found the mistake!!!!!!!!!.... it's on the parameters of write function... I was sending a int32 data, when it must be a float data... uhahuahuauhhuahua....
ty who try to find a answer...
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