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Strange SPI-Interrupt behaviour with STM32F107
von Marco (Guest)

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Hi,

I am working on a spi-driver implementation for STM32F107. Things seem 
to work quite well, but I get sporadic interrupts on SPI with only the 
BSY-flag set. No other flags like TXE,RXNE, etc. are set.

Here is my interrupt handler for spi(it is called by SPI3_IRQHandler 
where I disable all interrupts temporaryly) When the sporadic interrupt 
occurs, spiLastEvent contains 0x80.

1
void generalSpiInterruptHandler(SPI_TypeDef* pSpix, Int32 spiNum) 

2
{

3
  UInt16 spiLastEvent = pSpix->SR & 0x83;

4
5
 if (spiLastEvent & SPI_I2S_FLAG_RXNE)

6
  {

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    if ((NULL) != spiCallbacks[spiNum].rxCallback)

8
    {

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      spiCallbacks[spiNum].rxCallback(spiNum);

10
    } 

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  }

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  else

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  {

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    if(spiLastEvent & SPI_I2S_FLAG_TXE)

15
    {

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      if ((NULL) != spiCallbacks[spiNum].txCallback)

17
      {

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        spiCallbacks[spiNum].txCallback(spiNum);

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      }    

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    }

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    else

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    {

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      /* an error occoured */ 

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      if (spiLastEvent & SPI_I2S_FLAG_OVR)

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      {

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        /* overrun error */

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        if ((NULL) != spiCallbacks[spiNum].errorCallback)

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        {

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          spiCallbacks[spiNum].errorCallback(spiNum);

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        }

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      }

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      else

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      {

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        if(spiLastEvent & SPI_FLAG_MODF)

35
        {

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          /* Mode Fault */

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          if ((NULL) != spiCallbacks[spiNum].errorCallback)

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          {

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            spiCallbacks[spiNum].errorCallback(spiNum);

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          }

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        }

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        else

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        {

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          if(spiLastEvent & SPI_FLAG_CRCERR)

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          {

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            /* CRC error */

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            if ((NULL) != spiCallbacks[spiNum].errorCallback)

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            {

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              spiCallbacks[spiNum].errorCallback(spiNum);

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            }   

51
    

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          }

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          else

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          {

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            /* undefined error */

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            if ((NULL) != spiCallbacks[spiNum].errorCallback)

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            {

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             spiCallbacks[spiNum].errorCallback(spiNum);

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            }        

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          }

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        }

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      }

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    }

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  }  

65
}


Anybody seen this behavious with sporadic BSY-interrupts as well?

Thanks a lot in advance!

--
Marco

  


  




  

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    Re: Strange SPI-Interrupt behaviour with STM32F107
  


  

    

      von
      
        Angela (Guest)
      
      


      
    


    

      
    

    

    

  
  


  

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Hi Marco,

I hope u have solved the problem that u had.
Could u please provide me with the source code of the spi-driver for 
STM32F107.

Thxxx a lot.

Cheers,
Angela

  


  




  

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