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rozehtiyan
rozehtiyan
Associate III
September 26, 2014
Question

I2C doesn't send data and...

  • September 26, 2014
  • 2 replies
  • 660 views
Posted on September 26, 2014 at 15:16

 

 

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    2 replies

    chen
    chen
    Associate II
    September 29, 2014
    Posted on September 29, 2014 at 13:44

    Hi

    ''I'm newbie to work with I2C. What's the problem? Why isn't there an acknowledge at the end of the address?'' '' 

    I2C_Send7bitAddress(I2C1, 0x12, I2C_Direction_Transmitter);

    '' '' 

    I2C_InitStructure.I2C_OwnAddress1 = 0x08;

    '' Assuming that you are using the same init code in the slave device as in the host. You have not understood the 7 bit addressing of I2C I think - with own address = 0x08 (on the slave) The host should be sending address 0x10 for the slave to respond.
    rozehtiyan
    rozehtiyanAuthor
    Associate III
    October 1, 2014
    Posted on October 01, 2014 at 19:51

    Hi

    Thanks friend. I solved the problem and as you said the problem was addressing. also it doesn't work correctly still(but I have acknowledge now). If I would just connect the debugger to the slave board and start to working, it would work correctly but if the both board would be free(I mean without debugger), I have acknowledge but the master doesn't send the data(I mean 

    0xA1

    ). note that I have changed the both programs at the first post of the topic. it seems that it's halt again on this line in the master: 

    while
(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)){}

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