public static SCR DecodeSCR(byte[] response)
{
if (response?.Length != 8)
{
return(null);
}
SCR scr = new SCR
{
Structure = (byte)((response[0] & 0xF0) >> 4),
Spec = (byte)(response[0] & 0x0F),
DataStatusAfterErase = (response[1] & 0x80) == 0x80,
Security = (byte)((response[1] & 0x70) >> 4),
BusWidth = (byte)(response[1] & 0x0F),
Spec3 = (response[2] & 0x80) == 0x80,
ExtendedSecurity = (byte)((response[2] & 0x78) >> 3),
Spec4 = (response[2] & 0x04) == 0x04,
SpecX = (byte)(((response[2] & 0x03) << 2) + ((response[3] & 0xC0) >> 6)),
CommandSupport = (byte)(response[3] & 0x0F),
ManufacturerReserved = new byte[4]
};
Array.Copy(response, 4, scr.ManufacturerReserved, 0, 4);
return(scr);
}
public static string PrettifySCR(SCR scr)
{
if (scr == null)
{
return(null);
}
StringBuilder sb = new StringBuilder();
sb.AppendLine("SecureDigital Device Configuration Register:");
if (scr.Structure != 0)
{
sb.AppendFormat("\tUnknown register version {0}", scr.Structure).AppendLine();
}
if (scr.Spec == 0 && scr.Spec3 == false && scr.Spec4 == false && scr.SpecX == 0)
{
sb.AppendLine("\tDevice follows SecureDigital Physical Layer Specification version 1.0x");
}
else if (scr.Spec == 1 && scr.Spec3 == false && scr.Spec4 == false && scr.SpecX == 0)
{
sb.AppendLine("\tDevice follows SecureDigital Physical Layer Specification version 1.10");
}
else if (scr.Spec == 2 && scr.Spec3 == false && scr.Spec4 == false && scr.SpecX == 0)
{
sb.AppendLine("\tDevice follows SecureDigital Physical Layer Specification version 2.00");
}
else if (scr.Spec == 2 && scr.Spec3 && scr.Spec4 == false && scr.SpecX == 0)
{
sb.AppendLine("\tDevice follows SecureDigital Physical Layer Specification version 3.0x");
}
else if (scr.Spec == 2 && scr.Spec3 && scr.Spec4 && scr.SpecX == 0)
{
sb.AppendLine("\tDevice follows SecureDigital Physical Layer Specification version 4.xx");
}
else if (scr.Spec == 2 && scr.Spec3 && scr.SpecX == 1)
{
sb.AppendLine("\tDevice follows SecureDigital Physical Layer Specification version 5.xx");
}
else
{
sb
.AppendFormat("\tDevice follows SecureDigital Physical Layer Specification with unknown version {0}.{1}.{2}.{3}",
scr.Spec, scr.Spec3, scr.Spec4, scr.SpecX).AppendLine();
}
switch (scr.Security)
{
case 0:
sb.AppendLine("\tDevice does not support CPRM");
break;
case 1:
sb.AppendLine("\tDevice does not use CPRM");
break;
case 2:
sb.AppendLine("\tDevice uses CPRM according to specification version 1.01");
break;
case 3:
sb.AppendLine("\tDevice uses CPRM according to specification version 2.00");
break;
case 4:
sb.AppendLine("\tDevice uses CPRM according to specification version 3.xx");
break;
default:
sb.AppendFormat("\tDevice uses unknown CPRM specification with code {0}", scr.Security)
.AppendLine();
break;
}
if ((scr.BusWidth & 0x01) == 0x01)
{
sb.AppendLine("\tDevice supports 1-bit data bus");
}
if ((scr.BusWidth & 0x04) == 0x04)
{
sb.AppendLine("\tDevice supports 4-bit data bus");
}
if (scr.ExtendedSecurity != 0)
{
sb.AppendLine("\tDevice supports extended security");
}
if ((scr.CommandSupport & 0x08) == 0x08)
{
sb.AppendLine("\tDevice supports extension register multi-block commands");
}
if ((scr.CommandSupport & 0x04) == 0x04)
{
sb.AppendLine("\tDevice supports extension register single-block commands");
}
if ((scr.CommandSupport & 0x02) == 0x02)
{
sb.AppendLine("\tDevice supports set block count command");
}
if ((scr.CommandSupport & 0x01) == 0x01)
{
sb.AppendLine("\tDevice supports speed class control command");
}
return(sb.ToString());
}