2022-11-06 20:13:24 +08:00
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namespace LoraGamepad.Util;
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public class CrcUtil
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{
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/// <summary>
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/// CRC8——MAXIM校验字节
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/// </summary>
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/// <param name="data">带校验数据</param>
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/// <returns>校验字节</returns>
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public static byte CRC8_Calculate(byte[] data)
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{
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byte crc8 = 0;
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2022-11-08 15:05:47 +08:00
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for( int i = 0 ; i < data.Length; ++i){
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crc8 = crc8_dvb_s2_buf(crc8,data[i]);
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2022-11-06 20:13:24 +08:00
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}
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return(crc8);
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}
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2022-11-08 15:05:47 +08:00
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private static byte crc8_dvb_s2_buf(byte crc, byte dataIn)
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{
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crc ^= dataIn;
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for (int i = 0; i < 8; ++i) {
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if ((crc & 0x80) != 0 )
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{
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var temp = (byte)(crc << 1);
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crc = (byte)( temp ^ 0xD5);
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} else {
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crc = (byte)(crc << 1);
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}
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}
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return crc;
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}
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2022-11-06 20:13:24 +08:00
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/// <summary>
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/// CRC8——MAXIM校验表
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/// </summary>
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private static byte[] CRC8Table = {
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0, 94, 188, 226, 97, 63, 221, 131, 194, 156, 126, 32, 163, 253, 31, 65,
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157, 195, 33, 127, 252, 162, 64, 30, 95, 1, 227, 189, 62, 96, 130, 220,
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35, 125, 159, 193, 66, 28, 254, 160, 225, 191, 93, 3, 128, 222, 60, 98,
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190, 224, 2, 92, 223, 129, 99, 61, 124, 34, 192, 158, 29, 67, 161, 255,
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70, 24, 250, 164, 39, 121, 155, 197, 132, 218, 56, 102, 229, 187, 89, 7,
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219, 133, 103, 57, 186, 228, 6, 88, 25, 71, 165, 251, 120, 38, 196, 154,
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101, 59, 217, 135, 4, 90, 184, 230, 167, 249, 27, 69, 198, 152, 122, 36,
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248, 166, 68, 26, 153, 199, 37, 123, 58, 100, 134, 216, 91, 5, 231, 185,
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140, 210, 48, 110, 237, 179, 81, 15, 78, 16, 242, 172, 47, 113, 147, 205,
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17, 79, 173, 243, 112, 46, 204, 146, 211, 141, 111, 49, 178, 236, 14, 80,
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175, 241, 19, 77, 206, 144, 114, 44, 109, 51, 209, 143, 12, 82, 176, 238,
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50, 108, 142, 208, 83, 13, 239, 177, 240, 174, 76, 18, 145, 207, 45, 115,
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202, 148, 118, 40, 171, 245, 23, 73, 8, 86, 180, 234, 105, 55, 213, 139,
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87, 9, 235, 181, 54, 104, 138, 212, 149, 203, 41, 119, 244, 170, 72, 22,
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233, 183, 85, 11, 136, 214, 52, 106, 43, 117, 151, 201, 74, 20, 246, 168,
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116, 42, 200, 150, 21, 75, 169, 247, 182, 232, 10, 84, 215, 137, 107, 53
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};
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}
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