public void FPUTimingController()
{
using (var port = new COMPort())
{
var ops = new[]
{
FPUTimingType.None,
FPUTimingType.Add,
FPUTimingType.Sub,
FPUTimingType.Mul,
FPUTimingType.Div
};
var durations = new Dictionary <FPUTimingType, uint>();
var results = new Dictionary <FPUTimingType, float>();
var op1 = 100000000f;
var op2 = 10f;
foreach (var op in ops)
{
port.Write(new byte[] { (byte)op });
port.WriteFloat(op1);
port.WriteFloat(op2);
var opResult = port.ReadFloat(port.DefaultTimeout);
var duration = port.ReadUInt32(port.DefaultTimeout);
durations[op] = duration;
results[op] = opResult;
}
/// current FPU overhead is 11 clocks 8-{
const int overhead = 11;
var opDurations = durations
.Select(p => new { p.Key, Value = Math.Max(overhead, p.Value - durations[FPUTimingType.None]) - overhead })
.ToDictionary(p => p.Key, p => p.Value);
}
}
