DS1994 memory response problem

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  1. - 26th March 2007, 17:43 #1
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    Default DS1994 memory response problem

    hallo All! can someone help me! i wrote 04h to my scratchpad memory of DS1994 device but when reading the memory position for the data,i get FF in return!!!!!!!!!!!!! what could be the problem?
    thanks
  2. - 26th March 2007, 17:44 #2
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    Quote Originally Posted by chika View Post
    hallo All! can someone help me! i wrote 04h to my scratchpad memory of DS1994 device but when reading the memory position for the data,i get FF in return!!!!!!!!!!!!! what could be the problem?
    thanks
    Well, from what I can tell, the first problem I see in your program...
    Oh wait... I don't see any program!
    Ok, the problem is you.
    You didn't post any program for the rest of us to look at.
  3. - 27th March 2007, 03:49 #3
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    Default see below code

    Quote Originally Posted by skimask View Post
    Well, from what I can tell, the first problem I see in your program...
    Oh wait... I don't see any program!
    Ok, the problem is you.
    You didn't post any program for the rest of us to look at.
    .................................................. .................................................. .............hallo ,see code below! Im working with Beck SC12 µC and using beck I2C API to transfer data to DS1994(EEPROM) through DS2482(1-wire-I2C interface device!

    void WMatchEEPROM() //matchrom and write to eeprom page
    {

    uchar bufs0[2];
    uchar bufs1[2];
    uchar bufs2[2];
    uchar bufs3[2];
    uchar bufs4[2];
    uchar bufs5[2];
    uchar bufs6[2];
    uchar bufs7[2];
    uchar bufs8[2];
    uchar bufs9[2];
    uchar bufs10[2];
    uchar bufs11[2];
    uchar bufs12[2];
    uchar bufs13[2];
    onewreset1(); // 1 wire reset and reading the status register

    bufs0[0]=0xA5; // 1 wire write byte
    bufs0[1]=0x55; //match rom command
    I2C_transmit_block(0x30,bufs0,2);
    //I2C_release();
    bufs1[0]=0xA5;
    bufs1[1]=0x93; //MSB for eeprom address(start)7
    I2C_transmit_block(0x30,bufs1,2);
    //I2C_release();
    bufs2[0]=0xA5;
    bufs2[1]=0x00;// 6
    I2C_transmit_block(0x30,bufs2,2);
    //I2C_release();
    bufs3[0]=0xA5;
    bufs3[1]=0x00;// 5
    I2C_transmit_block(0x30,bufs3,2);
    //I2C_release();
    bufs4[0]=0xA5;
    bufs4[1]=0x00;// 4
    I2C_transmit_block(0x30,bufs4,2);
    //I2C_release();
    bufs5[0]=0xA5;
    bufs5[1]=0x14;// 3
    I2C_transmit_block(0x30,bufs5,2);
    //I2C_release();
    bufs6[0]=0xA5;
    bufs6[1]=0xA5;// 2
    I2C_transmit_block(0x30,bufs6,2);
    //I2C_release();
    bufs7[0]=0xA5;
    bufs7[1]=0x15;// 1
    I2C_transmit_block(0x30,bufs7,2);
    //I2C_release();
    bufs8[0]=0xA5;
    bufs8[1]=0x04;//0 LSB, adress end
    I2C_transmit_block(0x30,bufs8,2);
    I2C_release();
    bufs9[0]=0xA5;
    bufs9[1]=0x0F;//write scratchpad
    I2C_transmit_block(0x30,bufs9,2);
    //I2C_release();
    bufs10[0]=0xA5;
    bufs10[1]=0x00;//Msb of page1 address
    I2C_transmit_block(0x30,bufs10,2);
    //I2C_release();
    bufs11[0]=0xA5;
    bufs11[1]=0x26;//Lsb of page 1 address
    I2C_transmit_block(0x30,bufs11,2);
    //I2C_release();
    bufs12[0]=0xA5;
    bufs12[1]=0x11;// data to page 1 address
    I2C_transmit_block(0x30,bufs12,2);
    bufs13[0]=0xA5;
    bufs13[1]=0x22;// data to page 1 address
    I2C_transmit_block(0x30,bufs13,2);
    ReadStatusReg(); //status reg infomation
    I2C_release();
    }

    uchar RMatchEEPROM() //read eeprom page data
    {

    uchar bufs0[2];
    uchar bufs1[2];
    uchar bufs2[2];
    uchar bufs3[2];
    uchar bufs4[2];
    uchar bufs5[2];
    uchar bufs6[2];
    uchar bufs7[2];
    uchar bufs8[2];
    uchar bufs9[2];
    uchar bufx[2];
    uchar y,*ptry;
    uchar bufs[2];
    int i;
    onewreset1(); // 1 wire reset and reading the status register

    bufs0[0]=0xA5; // 1 wire write byte
    bufs0[1]=0x55; //match rom command
    I2C_transmit_block(0x30,bufs0,2);
    //I2C_release();
    bufs1[0]=0xA5;
    bufs1[1]=0x93; //MSB for eeprom address(start)7
    I2C_transmit_block(0x30,bufs1,2);
    //I2C_release();
    bufs2[0]=0xA5;
    bufs2[1]=0x00;// 6
    I2C_transmit_block(0x30,bufs2,2);
    //I2C_release();
    bufs3[0]=0xA5;
    bufs3[1]=0x00;// 5
    I2C_transmit_block(0x30,bufs3,2);
    //I2C_release();
    bufs4[0]=0xA5;
    bufs4[1]=0x00;// 4
    I2C_transmit_block(0x30,bufs4,2);
    //I2C_release();
    bufs5[0]=0xA5;
    bufs5[1]=0x14;// 3
    I2C_transmit_block(0x30,bufs5,2);
    //I2C_release();
    bufs6[0]=0xA5;
    bufs6[1]=0xA5;// 2
    I2C_transmit_block(0x30,bufs6,2);
    //I2C_release();
    bufs7[0]=0xA5;
    bufs7[1]=0x15;// 1
    I2C_transmit_block(0x30,bufs7,2);
    //I2C_release();
    bufs8[0]=0xA5;
    bufs8[1]=0x04;//0 LSB, adress end
    I2C_transmit_block(0x30,bufs8,2);
    //I2C_release();
    bufs9[0]=0xA5;// 1 wire byte
    bufs9[1]=0xAA;//read scratchpad
    I2C_transmit_block(0x30,bufs9,2);

    for(i=0;i<32;i++)
    {
    I2C_transmit_char(0x30,0x96); //1 wire readbyte
    I2C_release();
    //I2C_release();
    //bufs[0]=0x96;
    //bufs[1]=0x00;//Msb of page2
    //I2C_transmit_block(0x30,bufs,2);
    //I2C_release();
    // bufs[0]=0x96;
    // bufs[1]=0x00;//Lsb of page 2
    //I2C_transmit_block(0x30,bufs,2);
    ReadStatusReg(); //status reg infomation
    //I2C_release();
    bufx[0]=0xE1;//set readpointer
    bufx[1]=0xE1;//to data register
    I2C_transmit_block(0x30,bufx,2);
    I2C_receive_block(0x30,&y,1);
    printf("\n show reg data here!%02x\n",y);
    I2C_release();
    }
    return y;
    }
  4. - 27th March 2007, 03:53 #4
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    Is that Microchip C you are using?
  5. - 27th March 2007, 03:56 #5
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    Default ERROR response! from DS1994 device

    Hallo All,im working with BeckSC12 µC to communicate with DS1994(EEPROM) through DS2484(1 wire -I2C interface device).im also using beck I2C API!
    i wrote 00 11 to the EEPROM scratchpad but when reading back,i get aa and a seiries of FF!!!!!!!!!!!!!!what could be the problem!
    thanks.

    SEE CODE BELOW!!!!!!!!!!!!!!



    void WMatchEEPROM() //matchrom and write to eeprom page
    {

    uchar bufs0[2];
    uchar bufs1[2];
    uchar bufs2[2];
    uchar bufs3[2];
    uchar bufs4[2];
    uchar bufs5[2];
    uchar bufs6[2];
    uchar bufs7[2];
    uchar bufs8[2];
    uchar bufs9[2];
    uchar bufs10[2];
    uchar bufs11[2];
    uchar bufs12[2];
    uchar bufs13[2];
    onewreset1(); // 1 wire reset and reading the status register

    bufs0[0]=0xA5; // 1 wire write byte
    bufs0[1]=0x55; //match rom command
    I2C_transmit_block(0x30,bufs0,2);
    //I2C_release();
    bufs1[0]=0xA5;
    bufs1[1]=0x93; //MSB for eeprom address(start)7
    I2C_transmit_block(0x30,bufs1,2);
    //I2C_release();
    bufs2[0]=0xA5;
    bufs2[1]=0x00;// 6
    I2C_transmit_block(0x30,bufs2,2);
    //I2C_release();
    bufs3[0]=0xA5;
    bufs3[1]=0x00;// 5
    I2C_transmit_block(0x30,bufs3,2);
    //I2C_release();
    bufs4[0]=0xA5;
    bufs4[1]=0x00;// 4
    I2C_transmit_block(0x30,bufs4,2);
    //I2C_release();
    bufs5[0]=0xA5;
    bufs5[1]=0x14;// 3
    I2C_transmit_block(0x30,bufs5,2);
    //I2C_release();
    bufs6[0]=0xA5;
    bufs6[1]=0xA5;// 2
    I2C_transmit_block(0x30,bufs6,2);
    //I2C_release();
    bufs7[0]=0xA5;
    bufs7[1]=0x15;// 1
    I2C_transmit_block(0x30,bufs7,2);
    //I2C_release();
    bufs8[0]=0xA5;
    bufs8[1]=0x04;//0 LSB, adress end
    I2C_transmit_block(0x30,bufs8,2);
    I2C_release();
    bufs9[0]=0xA5;
    bufs9[1]=0x0F;//write scratchpad
    I2C_transmit_block(0x30,bufs9,2);
    //I2C_release();
    bufs10[0]=0xA5;
    bufs10[1]=0x00;//Msb of page1 address
    I2C_transmit_block(0x30,bufs10,2);
    //I2C_release();
    bufs11[0]=0xA5;
    bufs11[1]=0x26;//Lsb of page 1 address
    I2C_transmit_block(0x30,bufs11,2);
    //I2C_release();
    bufs12[0]=0xA5;
    bufs12[1]=0x11;// data to page 1 address
    I2C_transmit_block(0x30,bufs12,2);
    bufs13[0]=0xA5;
    bufs13[1]=0x22;// data to page 1 address
    I2C_transmit_block(0x30,bufs13,2);
    ReadStatusReg(); //status reg infomation
    I2C_release();
    }

    uchar RMatchEEPROM() //read eeprom page data
    {

    uchar bufs0[2];
    uchar bufs1[2];
    uchar bufs2[2];
    uchar bufs3[2];
    uchar bufs4[2];
    uchar bufs5[2];
    uchar bufs6[2];
    uchar bufs7[2];
    uchar bufs8[2];
    uchar bufs9[2];
    uchar bufx[2];
    uchar y,*ptry;
    uchar bufs[2];
    int i;
    onewreset1(); // 1 wire reset and reading the status register

    bufs0[0]=0xA5; // 1 wire write byte
    bufs0[1]=0x55; //match rom command
    I2C_transmit_block(0x30,bufs0,2);
    //I2C_release();
    bufs1[0]=0xA5;
    bufs1[1]=0x93; //MSB for eeprom address(start)7
    I2C_transmit_block(0x30,bufs1,2);
    //I2C_release();
    bufs2[0]=0xA5;
    bufs2[1]=0x00;// 6
    I2C_transmit_block(0x30,bufs2,2);
    //I2C_release();
    bufs3[0]=0xA5;
    bufs3[1]=0x00;// 5
    I2C_transmit_block(0x30,bufs3,2);
    //I2C_release();
    bufs4[0]=0xA5;
    bufs4[1]=0x00;// 4
    I2C_transmit_block(0x30,bufs4,2);
    //I2C_release();
    bufs5[0]=0xA5;
    bufs5[1]=0x14;// 3
    I2C_transmit_block(0x30,bufs5,2);
    //I2C_release();
    bufs6[0]=0xA5;
    bufs6[1]=0xA5;// 2
    I2C_transmit_block(0x30,bufs6,2);
    //I2C_release();
    bufs7[0]=0xA5;
    bufs7[1]=0x15;// 1
    I2C_transmit_block(0x30,bufs7,2);
    //I2C_release();
    bufs8[0]=0xA5;
    bufs8[1]=0x04;//0 LSB, adress end
    I2C_transmit_block(0x30,bufs8,2);
    //I2C_release();
    bufs9[0]=0xA5;// 1 wire byte
    bufs9[1]=0xAA;//read scratchpad
    I2C_transmit_block(0x30,bufs9,2);

    for(i=0;i<32;i++)
    {
    I2C_transmit_char(0x30,0x96); //1 wire readbyte
    I2C_release();
    //I2C_release();
    //bufs[0]=0x96;
    //bufs[1]=0x00;//Msb of page2
    //I2C_transmit_block(0x30,bufs,2);
    //I2C_release();
    // bufs[0]=0x96;
    // bufs[1]=0x00;//Lsb of page 2
    //I2C_transmit_block(0x30,bufs,2);
    ReadStatusReg(); //status reg infomation
    //I2C_release();
    bufx[0]=0xE1;//set readpointer
    bufx[1]=0xE1;//to data register
    I2C_transmit_block(0x30,bufx,2);
    I2C_receive_block(0x30,&y,1);
    printf("\n show reg data here!%02x\n",y);
    I2C_release();
    }
    return y;
    }
  6. - 27th March 2007, 03:58 #6
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    Quote Originally Posted by chika View Post
    Hallo All,im working with BeckSC12 µC to communicate with DS1994(EEPROM) through DS2484(1 wire -I2C interface device).im also using beck I2C API!
    i wrote 00 11 to the EEPROM scratchpad but when reading back,i get aa and a seiries of FF!!!!!!!!!!!!!!what could be the problem!
    thanks.
    Is that Microchip C you are using?
  7. - 28th March 2007, 18:51 #7
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    Quote Originally Posted by skimask View Post
    Is that Microchip C you are using?
    yes im using c
  8. - 28th March 2007, 22:35 #8
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    Quote Originally Posted by chika View Post
    yes im using c
    Ok, now go to the top of this web page and tell me what you see towards the upper left of the page...
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