DS1994 memory response problem

Closed Thread
Results 1 to 8 of 8
  1. - 26th March 2007, 18:43 #1
    chika's Avatar
    chika
    chika is offline Junior Member
    Join Date
    Mar 2007
    Posts
    4

    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, 18:44 #2
    skimask's Avatar
    skimask Guest

    Did you find this post helpful? Yes | No

    Default

    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, 04:49 #3
    chika's Avatar
    chika
    chika is offline Junior Member
    Join Date
    Mar 2007
    Posts
    4

    Did you find this post helpful? Yes | No

    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, 04:53 #4
    skimask's Avatar
    skimask Guest

    Did you find this post helpful? Yes | No

    Default

    Is that Microchip C you are using?
  5. - 27th March 2007, 04:56 #5
    chika's Avatar
    chika
    chika is offline Junior Member
    Join Date
    Mar 2007
    Posts
    4

    Did you find this post helpful? Yes | No

    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, 04:58 #6
    skimask's Avatar
    skimask Guest

    Did you find this post helpful? Yes | No

    Default

    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, 19:51 #7
    chika's Avatar
    chika
    chika is offline Junior Member
    Join Date
    Mar 2007
    Posts
    4

    Did you find this post helpful? Yes | No

    Default c language

    Quote Originally Posted by skimask View Post
    Is that Microchip C you are using?
    yes im using c
  8. - 28th March 2007, 23:35 #8
    skimask's Avatar
    skimask Guest

    Did you find this post helpful? Yes | No

    Default

    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...
« Previous Thread | Next Thread »

Similar Threads

  1. Memory Problem
    By morphyn in forum mel PIC BASIC Pro
    Replies: 1
    Last Post: - 18th February 2009, 22:59
  2. Need the code to write to a memory
    By Hamlet in forum General
    Replies: 0
    Last Post: - 20th August 2007, 01:22
  3. Using on-chip EEPROM (DATA) memory like serial memory - possible?
    By flotulopex in forum mel PIC BASIC Pro
    Replies: 4
    Last Post: - 2nd March 2007, 07:12
  4. 18F out of memory problem
    By tom in forum mel PIC BASIC Pro
    Replies: 5
    Last Post: - 23rd January 2007, 07:58
  5. Use internal program memory like DATA memory
    By flotulopex in forum mel PIC BASIC Pro
    Replies: 2
    Last Post: - 30th December 2006, 19:38

Members who have read this thread : 0

You do not have permission to view the list of names.

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts

Forum Rules