public static async Task Aggregator(
FPGA.InputSignal <bool> RXD,
FPGA.OutputSignal <bool> TXD
)
{
Sequential handler = () =>
{
FPU.FPUScopeNoSync();
while (true)
{
FPGA.Optimizations.AddOptimizer <DefaultOptimizer>();
const uint baud = 115200;
UART.ReadFloat(baud, RXD, out float mass);
UART.ReadFloat(baud, RXD, out float radius);
var vOrbit = FPGAOrbitalCalc.VOrbit(mass, radius);
UART.WriteFloat(baud, vOrbit, TXD);
}
};
FPGA.Config.OnStartup(handler);
}
public void Quokka_VOrbit()
{
using (var port = new QuokkaPort())
{
var r0 = 6371e+3f;
// orbit velocities around the earth
var cases = new[]
{
// low orbit
new
{
R = r0 + 200e+3f,
M = 5.972e+24f,
V = 7800f
},
// ISS orbit
new
{
R = r0 + 409e+3f,
M = 5.972e+24f,
V = 7660f
},
// geostationary orbit
new
{
R = r0 + 35786e+3f,
M = 5.972e+24f,
V = 3100f
},
// moon orbit
new
{
R = r0 + 399000e+3f,
M = 5.972e+24f,
V = 991f
},
};
foreach (var testCase in cases)
{
float calculated = FPGAOrbitalCalc.VOrbit(testCase.M, testCase.R);
var err = Math.Abs((calculated - testCase.V) / testCase.V);
Assert.IsTrue(err < 0.01);
port.WriteFloat(testCase.M);
port.WriteFloat(testCase.R);
var actualBytes = port.Read(4, true, port.DefaultTimeout);
var actual = TestConverters.FloatFromByteArray(actualBytes);
Assert.AreEqual(calculated, actual, $"Failed for {testCase}");
}
}
}