topic K12 CRC-CCITT in Kinetis Microcontrollers

K12 CRC-CCITT

walter_gallegos — Fri, 01 Apr 2016 00:53:19 GMT

Someone use the CRC module of K12 ?

I'm using the CRC-CCITT Processor Expert settings but result don't match.

Testing with "123456789" the CRC is 0x6856 when the expected is 0x29B1

Robin_Shen — Tue, 05 Apr 2016 08:38:44 GMT

Hi Walter,

You can refer the Typical Usage of Component CRC_LDD.

Then I can get the result: 0x29B1

Best Regards,

Robin

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walter_gallegos — Tue, 05 Apr 2016 13:26:13 GMT

Hi Robin, thank you for answer.

Yes, I check block CRC work as expected but byte to byte apparently not.

First CRC is : 0x6856

Second CRC is : 0x29b1

Due firmware constraints we prefer use CRC_GetCRC16.

We can modify to process CRC as block but both CRC must be equal, correct ?

Best regards,

Walter

Robin_Shen — Mon, 02 Nov 2020 13:24:39 GMT

Hi Walter,

If you want the CRC work byte to byte, you need use CRC1_GetCRC8.

  CRC1_ResetCRC(DeviceData);
  for (i = 0; i < sizeof(dat)-1; i++) {
    crc = CRC1_GetCRC8(DeviceData,dat[i]);
  }

Best Regards,

Robin

walter_gallegos — Wed, 06 Apr 2016 14:06:25 GMT

Hi Robin,

Thank you for your support,

My apologies, I misunderstand the function name considering GetCRC16 as a CRC in 16 bits and not a CRC with 16 bit data.

So, to calc a CRC-CCITT byte to byte I need set up the CRC module for 16 bits with polynomial and seed in 16 bits but use the module calling GetCRC8.

Best regards,

Walter