class BchClass
{
//BCH编码
//把数据从16位变成26位
public static string BuildEfficacyCode(uint mx)
{
ushort g = 0x5B9;//11位
ushort register = 0x0000;//定义16位的寄存器,最后数据为10位
//获取mx的长度
int mxLength = Convert.ToString(mx, 2).Length;
//定义i的总数
int iLength = mxLength + 9;
/*将mx后面补10个0,从16位变成26位*/
mx <<= 10;
for (int i = iLength; i >= 0; i--)
{
if (((register >> 10) & 0x0001) == 0x1)
{
register = (ushort)(register ^ g);
}
/*寄存器慢慢获取值*/
//寄存器左移动一位
register <<= 1;
//信息位从最高位慢慢取数据，给寄存器最低位。
ushort tmp = (ushort)((mx >> i) & 0x0001);
register |= tmp;
/*寄存器慢慢获取值*/
}
if (((register >> 10) & 0x0001) == 0x1) register = (ushort)(register ^ g);
string registerString;
registerString = Convert.ToString(register, 16).ToUpper();
return registerString;
}
//基础需要校验的数组
public static uint CorrectSignalBchcode(string receiveData)
{
ushort sn;
sn = CheckBchCode(receiveData);//sn=rx/g
//查询里面的数字，如果有，则把这个数组下标对应的位置和接收数据进行取反，就纠错完成。
ushort[,] snTable;
snTable = new ushort[26, 26]
{
//26行，26列
{119,656,984,892,814,775,463,171,25,64,688,968,884,810,773,462,631,375,247,0,87,103,127,0,117,118},
{0,743,328,492,446,407,863,571,649,720,32,344,484,442,405,862,231,999,615,679,0,759,751,739,0,742},
{0,0,943,164,246,223,535,883,961,920,360,16,172,242,221,534,431,687,815,1007,911,0,935,939,941,0},
{0,0,0,779,82,123,691,983,869,828,460,180,8,86,121,690,267,523,907,843,811,795,0,783,777,778},
{0,0,0,0,857,41,737,901,823,878,414,230,90,4,43,736,345,601,985,793,889,841,849,0,859,856},
{0,0,0,0,0,880,712,940,798,839,439,207,115,45,2,713,368,624,1008,816,848,864,888,0,0,881},
{0,0,0,0,0,0,440,356,470,399,895,519,699,741,714,1,952,184,312,504,408,424,432,444,0,0},
{0,0,0,0,0,0,0,220,178,235,539,867,991,897,942,357,732,476,92,156,252,204,212,216,222,0},
{0,0,0,0,0,0,0,0,110,89,681,977,877,819,796,471,622,366,238,46,78,126,102,106,108,111},
{0,0,0,0,0,0,0,0,0,55,752,904,820,874,837,398,567,311,183,0,23,39,63,51,53,54},//10
{0,0,0,0,0,0,0,0,0,0,711,376,452,410,437,894,199,967,583,647,0,727,719,707,709,710},
{0,0,0,0,0,0,0,0,0,0,0,959,188,226,205,518,447,703,831,1023,927,0,951,955,957,958},
{0,0,0,0,0,0,0,0,0,0,0,0,771,94,113,698,259,515,899,835,803,787,0,0,769,770},
{0,0,0,0,0,0,0,0,0,0,0,0,0,861,47,740,349,605,989,797,893,845,853,0,0,860},
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,882,715,370,626,1010,818,850,866,890,886,0,0},
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,441,953,185,313,505,409,425,433,445,443,0},
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,512,768,640,576,544,528,520,516,514,513},
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,256,384,320,288,272,264,260,258,257},
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,128,192,160,144,136,132,130,129},
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,96,80,72,68,66,65},
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,48,40,36,34,33},
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,24,20,18,17},
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,12,10,9},
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,6,5},
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3},
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}
};
//定位位置
int p = 26;
int q = 26;
//在数组中寻找数据
for (int i = 0; i < 26; i++)
{
for (int j = 25; j >= i; j--)
{
//如果找到，就进行
if (snTable[i, j] == sn)
{
Console.WriteLine(i + "==" + j);
p = i + 1;
q = j + 1;
break;
}
}
}
//如果找到了数据，进行修改，没有找到数据，则舍弃数据
//把接收数据由字符串转换为ushort类型
uint ushortReceiveData = new uint();
ushortReceiveData = Convert.ToUInt32(receiveData, 2);
//定义纠正后数据
uint correctData = new uint();
if (p == 26 && q == 26)
{
//舍弃数据
sn = 0;
}
else
{
//把sn中的第P和第Q位数据进行修改。
if (p == q)
{
correctData = (uint)(ushortReceiveData ^ (1 << (26 - p)));
}
else
{
ushortReceiveData = (uint)(ushortReceiveData ^ (1 << (26 - p)));
correctData = (uint)(ushortReceiveData ^ (1 << (26 - q)));
}
}
return correctData;
}
//效验26位数据是否正确
public static ushort CheckBchCode(string receiveData)
{
ushort g = 0x5B9;//11位
ushort register = 0x0000;//定义16位的寄存器,最后数据为10位
//获取mx的长度
int mxLength = receiveData.Length;
//定义i的总数
int iLength = mxLength - 1;//如果总数为26位，则为iLength为25
//将receiveData转换为mx uint型。
uint mx;
mx = Convert.ToUInt32(receiveData, 2);
for (int i = iLength; i >= 0; i--)
{
if (((register >> 10) & 0x0001) == 0x1)
{
register = (ushort)(register ^ g);
}
/*寄存器慢慢获取值*/
//寄存器左移动一位
register <<= 1;
//信息位从最高位慢慢取数据，给寄存器最低位。
ushort tmp = (ushort)((mx >> i) & 0x0001);
register |= tmp;
/*寄存器慢慢获取值*/
}
if (((register >> 10) & 0x0001) == 0x1) register = (ushort)(register ^ g);
return register;
}
}
