Pilot Communications SPM93 - Calculating the CRC-16 Error Check Field

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9.3.4 Preset Multiple Registers (Function code 10H)
This command packet allows the Master to program the SPM93 setup parameters.
Preset Registers Format
(Master→DFPM93)
Response Format
(DFPM93→Master)
Unit ID/ Slave address
1 byte
Unit ID/ Slave address
1 byte
10 H (Function Code)
1 byte
10 H (Function Code)
1 byte
Start register address
2 bytes
Start register address
2 bytes
Register num.
2 bytes
Register num.
2 bytes
Byte num.
(2 * register num.)
1 byte
CRC check code
2 bytes
First register data
2 bytes
Second register data
2 bytes
...
CRC check code
2 bytes
Note: SPM93 presume all registers are continuous from the first one.
9.4. Calculating the CRC-16 Error Check Field
This section describes the procedure for obtaining the CRC-16 error check field. A
packet can be considered as a continuous, serial stream of binary data (ones and
zeros). The 16-bit checksum is obtained by multiplying the serial data stream by 216
(10000000000000000) and then dividing it by the generator polynomial