Troubles with HAL_GetTick() in the I2C_WaitOnFlagUntilTimeout functions on a STM32G473 MCU

[TCarm.1]

I am currently using the v1.6.1 of STM32CubeIDE and a STM32G473 MCU.

I have implemented an I2C bus and have noticed a major bug with the I2C_WaitOnFlagUntilTimeout functions. There is this condition:

if (((HAL_GetTick() - Tickstart) > Timeout) || (Timeout == 0U))

which is supposed to guarantee that the program doesn't get stuck into the while loop above (while (__HAL_I2C_GET_FLAG(hi2c, Flag) == Status)), but the tick value stop incrementing as soon as the program enters the function for a reason I don't understand. I have tried to increase the preempt priority of System tick timer (by lowering the value) but it didn't change a thing.

Does anyone know how to fix that?

[TDK]

The only reason the ticks would stop increasing is if you're the same or higher priority interrupt, or if interrupts are disabled, or if SysTick is disabled.

[TCarm.1]

The thing is I don't even use the I2C bus in interrupt mode. I have no trouble when I don't call the HAL_I2C_Master_Transmit or HAL_I2C_Master_Receive functions, but as soon as I call them I got stuck into an infinite loop in I2C_WaitOnFlagUntilTimeout.

I have tried to low the priority interrupt, without effect, and I didn't disabled SysTick (the HAL_InitTick function returns HAL_OK)

[TDK]

Not sure. I see no reason why calling HAL_I2C_* function would cause the systick to stop functioning. Make sure you don't call it with HAL_MAX_DELAY if you want a timeout.

[Eich]

Could you find a soulution?

I have exactly the same problem. Systick stops and I2C remains in an endless loop waiting that the timeout is reached. That will never happen because Systick is no longer updated.

[SCrum.1]

I also have this exact same problem. STM32G0B0. Somewhere in the HAL_I2C_Master_Transmit function, the tick timer interrupt stops firing. In my case HAL_I2C_Master_Transmit returns an error because the I2C device does not acknowledge. So I try and do a short delay and try again, but its stuck in HAL_Delay as the tick value is no longer updating.