RTOS/CC2640R2F: I2C stuck the system forever

amir zureik

Part Number: CC2640R2F

Tool/software: TI-RTOS

Hi All,

In my board I use I2C for many slaves, sometimes after running some minutes suddenly the I2C blocked at the Semaphore pend in the I2C driver

"SemaphoreP_pend(&(object->transferComplete), SemaphoreP_WAIT_FOREVER);" (I2CCC26XX.c)

and stuck the system. I am working in Blocking mode, with 100 kHz speed.

After some research I connected the SDA and the SCL to oscilloscope, then I noticed that sometimes the I2C transfer miss a clock (See the attached photo)

I have no idea what cause the problem and have no idea how to solve it, each time this happens my system is stuck.

over 6 years ago

0 IUsedToBeARealPerson (M-W) over 6 years ago

TI__Guru 58425 points

Hi Amir,

That looks strange, I wonder if it could be something on your bus that pulls your clock line low for some reason?

Also, could you comment on what SDK version you are currently working of?

0 amir zureik over 6 years ago

Intellectual 290 points

Hi, I forget to write that I am working with SDK 1.50.00.58

0 IUsedToBeARealPerson (M-W) over 6 years ago in reply to amir zureik

TI__Guru 58425 points

Hi Amir,

As you have multiple slaves on the line, haveyou verify that all of them is "behaving" and that they are not part of the problem? For example an unexpected clock stretch or something similar from one of the slaves.

0 IUsedToBeARealPerson (M-W) over 6 years ago in reply to IUsedToBeARealPerson (M-W)

TI__Guru 58425 points

Hi Amir,

Do you have any updates on this topic?

0 IUsedToBeARealPerson (M-W) over 6 years ago in reply to IUsedToBeARealPerson (M-W)

TI__Guru 58425 points

Closing the thread due to inactivity. If you are still seeing the issue, feel free to continue posting here or start a new related thread using the "Ask related question".

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RTOS/CC2640R2F: I2C stuck the system forever