public override bool Recv(byte[] buf) {
if(buf[0]==ADDR) {
if(buf[1]==0x10) {
if(_st==-1 && buf.Length==26) {
_pt=DateTime.Now;
_st=0;
_ac1=(short)((buf[4]<<8) | buf[5]);
_ac2=(short)((buf[6]<<8) | buf[7]);
_ac3=(short)((buf[8]<<8) | buf[9]);
_ac4=(ushort)((buf[10]<<8) | buf[11]);
_ac5=(ushort)((buf[12]<<8) | buf[13]);
_ac6=(ushort)((buf[14]<<8) | buf[15]);
_b1=(short)((buf[16]<<8) | buf[17]);
_b2=(short)((buf[18]<<8) | buf[19]);
_mb=(short)((buf[20]<<8) | buf[21]);
_mc=(short)((buf[22]<<8) | buf[23]);
_md=(short)((buf[24]<<8) | buf[25]);
} else if((_st==2 || _st==3) && buf.Length==6) {
_ut=(buf[4]<<8) | buf[5];
_pt=DateTime.Now.AddMilliseconds(-1);
_st++;
} else if(_st==5 && buf.Length==7) {
// Calculate temperature
int x1 = (((int)_ut - _ac6) * _ac5) >> 15;
int x2 = (_mc << 11) / (x1 + _md);
int b5 = x1 + x2;
_T.value=Math.Round((b5 + 8)/160.0, 2);
int up=((buf[4]<<16) | (buf[5]<<8) | buf[6])>>(8-BMP180_OSS);
int b6 = b5 - 4000;
// calculate B3
x1 = (b6 * b6)>>12;
x1 *= _b2;
x1 >>= 11;
x2 = _ac2 * b6;
x2 >>= 11;
int x3 = x1 + x2;
int b3 = (((_ac1 * 4 + x3) << BMP180_OSS) + 2) >> 2;
// calculate B4
x1 = (_ac3 * b6) >> 13;
x2 = (_b1 * ((b6*b6) >> 12)) >> 16;
x3 = ((x1 + x2) + 2) >> 2;
uint b4 = (_ac4 * (uint)(x3 + 32768)) >> 15;
uint b7 = ((uint)(up - b3) * (50000>>BMP180_OSS));
int p;
if(b7 < 0x80000000) {
p = (int)(b7*2/b4);
} else {
p = (int)(b7 / b4)*2;
}
x1 = (p >> 8);
x1 *= x1;
x1 = (x1 * 3038) >> 16;
x2 = (p * -7357) >> 16;
p += (x1 + x2 + 3791) >> 4;
_P.value=p;
_present.value=true;
_pt=DateTime.Now.AddSeconds(_rand.Next(45, 75));
_st=0;
} else {
_present.value=false;
Reset();
}
} else {
_present.value=false;
if(TWIDriver._verbose) {
Log.Error("{0}.recv - {1}", _T.path, (AckFlags)buf[1]);
}
_pt=DateTime.Now.AddSeconds(_rand.Next(135, 165));
_st=0;
}
return true;
}
return false;
}
public override bool Poll(out byte[] buf) {
