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mosine
mosine
Associate III
March 17, 2014
Question

I2C and EEprom

  • March 17, 2014
  • 2 replies
  • 632 views
Posted on March 17, 2014 at 11:34

Hi,

I'm starting to develop an application where I'll manage EEprom data by I2C. Is there a complete example for stm32F0discovery? 

Thanks
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    2 replies

    Tesla DeLorean
    Tesla DeLorean
    Guru
    March 17, 2014
    Posted on March 17, 2014 at 13:22

    It's for the EVAL board, but could be ported.

    STM32F0xx_StdPeriph_Lib_V1.1.0\Project\STM32F0xx_StdPeriph_Examples\I2C\I2C_EEPROM
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    mosine
    mosineAuthor
    Associate III
    March 21, 2014
    Posted on March 21, 2014 at 12:09

    Thanks Clive1,

    I did as you said and it all works, but I have a problem. When I need to do continuousreads o writes, my project doesn't work. My code: 

    if(nciclo == 0){
eeWriteBuffer(Tx1Buffer, 0, BUFFER_SIZE2); 
eeWaitEepromStandbyState();
eeWriteBuffer(Tx2Buffer, 32, BUFFER_SIZE2); 
eeWaitEepromStandbyState();
nciclo = 1;
}else{
eeRead(Rx1Buffer, 0, (uint16_t *)(&NumDataRead));
eeRead(Rx2Buffer, 32, (uint16_t *)(&NumDataRead));
nciclo = 0;
}

    This code is into a task which is called every 100msec. The first time writes page0 and page1, the second time reads page0 and page1. When I read Rx1Buffer is ok, instead Rx2Buffer is empty. Why? Is there an instruction to wait the next write/read?
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