i.MX RT CRC calculations

[tajsbrandt]

The datasheet for i.MX RT1050 states that there is hardware support for CRC-32 calculations, but when looking in the reference manual CRC-32 is not mentioned. Does the processor provide an interface for hardware accelerated CRC-32 calculations for custom usage?

Best regards

Tajs

Datasheet page 4:

Security functions are enabled and accelerated by the following hardware:

• High Assurance Boot (HAB)

• Data Co-Processor (DCP):

— AES-128, ECB, and CBC mode

— SHA-1 and SHA-256

— CRC-32

Reference manual page 446:

For security purposes, the Data Co-Processor (DCP) provides hardware acceleration for

the cryptographic algorithms. The features of DCP are:

• Encryption Algorithms: AES-128 (ECB and CBC modes)

• Hashing Algorithms: SHA-1 and SHA-256

• Key selection from the SNVS, DCP internal key storage, or general memory

• Internal Memory for storing up to four AES-128 keys—when a key is written to a

key slot it can be read only by the DCP AES-128 engine

• IP slave interface

• DMA

[Rita_Wang]

Yes, as you can see in the datasheet:

Security functions are enabled and accelerated by the following hardware:

• High Assurance Boot (HAB)

• Data Co-Processor (DCP):

— AES-128, ECB, and CBC mode

— SHA-1 and SHA-256

— CRC-32

[antonypace]

I agree with the OP.  I can see that there is hardware in the Data co-processor to perform a CRC-32 but I can't see anywhere how I could do this.

To be clear, my requirements are that I have a couple of hundred bytes in internal RAM and I want to calculate the CRC-32 of them.  Can anyone tell me which registers I need to set up to get the co-processor to perform that calculation for me?