Usage of CRC Peripheral Throughout TouchGFX Operation

[meghzop]

Hi ST Community,

We are using the hardware CRC peripheral in our project for CRC computation.

During system initialization, we initialize and configure the CRC peripheral ourselves. However, we observed that after calling MX_TouchGFX_PreOSInit(), the CRC peripheral appears to be re-initialized.

We would like to understand how TouchGFX uses the CRC peripheral internally.

Specifically:

1. Does TouchGFX use the hardware CRC peripheral only during the MX_TouchGFX_PreOSInit() phase?
2. Is the CRC peripheral used by TouchGFX during frame rendering or while processing/displaying frames?
3. Are there any other TouchGFX phases, functions, or background operations where the CRC peripheral may be accessed?
4. If both TouchGFX and our application use the same hardware CRC peripheral, could sharing the peripheral cause any issues?

Our concern is that our application relies on a specific CRC configuration, and we want to ensure that TouchGFX does not modify or reconfigure the CRC peripheral after our initialization, or otherwise interfere with application-level CRC calculations.

Any information about the expected CRC peripheral usage, initialization sequence, and whether the CRC peripheral can safely be shared between TouchGFX and the application would be greatly appreciated.

 

Thanks