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TM4C129ENCZADT3 FOR I2C_MODE_BLOCKING

Bard Ciou
Intellectual 900 points

Dear Team,

 

In i2c blocking mode, the function returns false once errors occurred, such as NACK.

   Please help confirm, what kind condition will trigger "False " of  I2C_MODE_BLOCKING??

Regards,

bard 

  • 0
    TI__Guru*** 135355 points

    Hello Bard,

    I tried digging into the TI-RTOS code for TM4C as that seems to be the source of this question since we do not use I2C_MODE_BLOCKING in TivaWare. Unfortunately, I was not able to find out an exact measure of what else could cause this. However if going by what I would anticipate from TivaWare - and TI-RTOS does use our TivaWare drivers - then the other condition besides a NAK which would trigger the false flag is if the Arbitration Lost condition is detected on the I2C bus.