1,386
edits
Changes
Landis+Gyr GridStream Protocol (view source)
Revision as of 00:49, 6 March 2021
, 00:49, 6 March 2021→Checksum
====Checksum====
----
<pre>uint16_t Landis_crc16 (uint16_t crc, const std::vector<uint8_t> &data, size_t size) {<br>// CoServ CRC = 0x45F8<br>// Oncor CRC = 0x5FD6<br>// Hard coded Poly 0x1021<br> uint16_t i = 0;<br>
while (size--) {
crc ^= data[i] << 8; i++; for (unsigned k = 0; k < 8; k++) crc = crc & 0x8000 ? (crc << 1) ^ 0x1021 : crc << 1;
}
return crc;
}</pre>
----<br />