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Generate CRC value in full CPU mode

David Sabol
Genius 4850 points

Hi,

 

I am trying to verify that I can pre-determine a crc value and that it matches what the crc module generates on the TMS570.  Eventually I will be using the crc module in auto mode across all of flash, but as a first step I wanted to see if I could run it in full mode and generate a crc value for one 64 bit chunk of data, and make sure it matches what I calculate.  However, the two values do not match.  Can someone take a look at my crc set up for full mode and let me know what I may be doing incorrectly?  Is my approach valid?

 

When I calculate the value (using pycrc) I get 0x46A5A9388A5BEFFE.  The value I get from the crc module is

0x46C80A306F49FA85.  My input data is 123456789

Thanks

	uint32 channel = 1;
	uint64 crcModuleValue = 0;
	crcConfig_t crcConfig;
	crcModConfig_t crcData;
	uint64 data = 123456789;

	crcData.mode = CRC_FULL_CPU;     //< Mode of operation
	crcData.crc_channel = channel;     //< CRC channel-0,1
	crcData.src_data_pat = &data;  //< Pattern data
	crcData.data_length = sizeof(data);

	crcConfig.crc_channel = channel;     //< CRC channel-0,1
	crcConfig.mode = CRC_FULL_CPU;     //< Mode of operation
	crcConfig.pcount = 1;     //< Pattern count
	crcConfig.scount = 1;     //< Sector count
	crcConfig.wdg_preload = 0;  //< Watchdog period
	crcConfig.block_preload = 0;


	crcInit();

	crcSetConfig(crcREG, &crcConfig);
	crcSignGen(crcREG, &crcData);
	crcModuleValue = crcGetPSASig(crcREG, channel);