CRC32 MPEG2 configuration for ST32C0x1 CRC driver

[STDoom]

Hi

I'm trying to understand how to configure the hal/peripheral to evaluate the CRC32 MPEG2 over a block of datas.

I'm comparing the result with this site where as input I've used the vector 0x01, 0x01. Expected result is 0xD66FB816

https://crccalc.com/?crc=0x01,0x01&method=crc32&datatype=hex&outtype=0 

I've configured the hal in the following way

hcrc.Instance = CRC;

hcrc.Init.DefaultPolynomialUse = DEFAULT_POLYNOMIAL_DISABLE;

hcrc.Init.GeneratingPolynomial = 0x04C11DB7;

hcrc.Init.DefaultInitValueUse = DEFAULT_INIT_VALUE_DISABLE;

hcrc.Init.InitValue = 0xFFFFFFFF;

hcrc.Init.CRCLength=CRC_POLYLENGTH_32B;

hcrc.Init.InputDataInversionMode = CRC_INPUTDATA_INVERSION_NONE;

hcrc.Init.OutputDataInversionMode = CRC_OUTPUTDATA_INVERSION_DISABLE;

hcrc.InputDataFormat = CRC_INPUTDATA_FORMAT_BYTES;

NOTE that poly and init value that I've set are equal to the default values

but I get this result

0xeec8fd24

Does someone has an idea how to configure this peripheral to get the expected result?

[Tesla DeLorean · Accepted solution]

0xeec8fd24 is from pattern { 0x01,0x00,0x00,0x00,0x01,0x00,0x00,0x00 };

Look at how you'd feeding data into the CRC peripheral. What function are you using to pass data?

Feed bytes via *((volatile uint8_t *)&CRC->DR) = byte;

[STDoom]

Hi Tesla

Perfect! I've found the issue.