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stucmath · 2019-08-21

HelloSince the STM32f42xx series has no intial value for the CRC I'm wondering if there is a way to stop a crc calculation (store the DR value) and resume it by writing the DR register with the stored value and some calculation??Something like this:c...

stucmath · 2019-08-20

HelloI was studying the errata sheet for my uC (STM32F427ZI) and found this entry:Corrupted last bit of data and/or CRC, received in Master mode with delayed SCK feedbackFor the possible workarounds a table with the maximum allowable APB frequency is...

stucmath · 2019-08-28

@Community member Do you have some sort of mathematic derivation how the reverse crc calculaton works?

stucmath · 2019-08-27

Yes, there is no way to do that with DMA.But what do you mean with "the other side appears to have more flexibility"?

stucmath · 2019-08-26

Once again an awesome solution. Thank you very much!Now I have to figure out how to use this solution with DMA.Do you maybe have an idea how I could do that?Is it possible to change the dma data before every transfer?

stucmath · 2019-08-23

Yes thats right, the FM3 has the same polynomial.I did some testing with the FM3 uC. I changed the CRC Input Byteorder from little endian to big endian and I received this crc value:0x4A090E98On the STM uC I did an XOR calculation the the result valu...

stucmath · 2019-08-23

Since you ar the expert on this topic.Is there a way to convert a CRC32b to CRC32 value?My problem is: With the STM32F4 I have to get the same CRC value as the Fujitsu FM3 CRC (MB9BF416N) calculates (for retro compatibilty).Configuration of the Fujit...

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