Real-Time Data Monitor (RTDM) Cumulative CRC16 Function



This function calculates the polynomial for the checksum byte.

There are two approaches to calculating this number:

  1. “On-the-fly” every time saves code space because no const table is required. This approach saves code space but yields slower throughput performance.
  2. Use a coefficients table. This approach has faster performance but consumes a higher amount of program memory.




unsigned int RTDM_CumulativeCrc16 (unsigned char *buf, 
                                   unsigned int u16Length, 
                                   unsigned int u16CRC      );


unsigned char *buf A pointer to the state memory for the data to be used on the checksum calculation
unsigned int u16Length Number of bytes to be computed
unsigned int u16CRC Polynomial value used to calculate the CRC16 checksum

Return Value

CRC16 checksum value

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