public void Lib_Cos()
{
float stepDelta = FPGATrigonometryConstants.TwoPI / Steps;
var posError = double.MinValue;
var negError = double.MaxValue;
var absError = 0d;
// able to achieve about this accuracy
var eps = 2.5e-5;
for (var step = 0; step < Steps; step++)
{
var rad = step * stepDelta;
// calculate cos
var taylorCos = FPGATrigonometry.Cos(rad);
var calculatedCos = Math.Cos(rad);
var cosDelta = taylorCos - calculatedCos;
absError = Math.Max(absError, Math.Abs(cosDelta));
posError = Math.Max(cosDelta, posError);
negError = Math.Min(cosDelta, negError);
Assert.IsTrue(absError < eps, $"Failed for cos({rad})");
}
}
public static float DeltaVInclinationOrbit(float mass, float innerRadius, float outerRadius, float inclination)
{
var vApogee = SequentialMath.Sqrt(2 * FPGAOrbitalCalcConstants.G * mass * (innerRadius / outerRadius) * (1 / (innerRadius + outerRadius)));
var vOrbital = VOrbit(mass, outerRadius);
var cosInc = FPGATrigonometry.Cos(inclination);
var deltaV = SequentialMath.Sqrt(vApogee * vApogee + vOrbital * vOrbital - 2 * vApogee * vOrbital * cosInc);
return(deltaV);
}
public static float DeltaVInclinationOrbitOptimized(float mass, float innerRadius, float outerRadius, float inclination)
{
var vApogeeSquared = 2 * FPGAOrbitalCalcConstants.G * mass * (innerRadius / outerRadius) * (1 / (innerRadius + outerRadius));
var vOrbitalSquared = VOrbitSquared(mass, outerRadius);
var cosInc = FPGATrigonometry.Cos(inclination);
var vCos = SequentialMath.Sqrt(vApogeeSquared * vOrbitalSquared * cosInc * cosInc);
var deltaV = SequentialMath.Sqrt(vApogeeSquared + vOrbitalSquared - 2 * vCos);
return(deltaV);
}
public void Cos()
{
using (var port = new QuokkaPort())
{
var rnd = new Random(Environment.TickCount);
foreach (var idx in Enumerable.Range(-5000, 10000))
{
var value = (float)(idx * rnd.NextDouble() * FPGATrigonometryConstants.TwoPI);
port.WriteFloat(value);
var expected = FPGATrigonometry.Cos(value);
var actualBytes = port.Read(4, true, port.DefaultTimeout);
var actual = TestConverters.FloatFromByteArray(actualBytes);
Assert.AreEqual(expected, actual, $"Failed for {value}");
}
}
}
public static async Task Aggregator(
FPGA.InputSignal <bool> RXD,
FPGA.OutputSignal <bool> TXD
)
{
Sequential handler = () =>
{
FPU.FPUScopeNoSync();
while (true)
{
float data = 0;
UART.ReadFloat(115200, RXD, out data);
data = FPGATrigonometry.Cos(data);
UART.WriteFloat(115200, data, TXD);
}
};
FPGA.Config.OnStartup(handler);
}