I2C: Unexpected transfer complet interrupt

[matthiasuhlmann]

Hi All,

I have a I2C Slave using interrupts.

Now i have the problem that from time to time there is a unexpected "Byte Transfer" Interrupt which is at a strange position (in the middle of a Byte).

Do anybody know this behavior and know a solution? Did i made something wrong?

Best Regards

[xiangjun_rong]

Hi,Mattias,

Could you tell us the part number you are using? do you use Processor Expert to develop code? what version of CodeWarrior tools are you using? I suggest you paste or attach the code so that we can check it.

BR

XiangJun Rong

[matthiasuhlmann]

Hi XiangJun,

Part Nr.: MC56F84769; I don't use Processor Expert, Code Warrior: Version: 10.3, Build Id:121211

I can not attach or paste the code because i made a library which is maybe a little bit difficult to read (registers are set by enumerations wich can be selected in the application)

But here are the registers after initialisation:

I changed priority level from 0 to 1 which solved my problem. At the moment I2C is robust and there were no more unexpected interrupts. If i have enought time i will ask you again in future but for the moment its ok.

Thank You!

Matthias