Landis+Gyr GridStream Protocol: Difference between revisions

----<code>uint16_t Landis_crc16 (uint16_t crc, const std::vector<uint8_t> &data, size_t size) {</code>

<code>// CoServ CRC = 0x45F8</code>

<code>// Oncor CRC = 0x5FD6</code>

<code>// Hard coded Poly 0x1021</code>

<code>    uint16_t i = 0;</code>

<code>    while (size--) {       </code>

<code>crc ^= data[i] << 8;</code>

<code>i++;</code>

<code>for (unsigned k = 0; k < 8; k++)</code>

<code>crc = crc & 0x8000 ? (crc << 1) ^ 0x1021 : crc << 1;     </code>

<code>    }     </code>

<code>return crc;</code>

<code>}</code>