multi_core_inverter: add some stimuli and measurements

crates/applications/multi_core_inverter/src/main.rs

@@ -37,23 +37,30 @@
 //! ```
 
 use coremem::geom::{Coord as _, Meters, Torus};
+use coremem::mat::{Ferroxcube3R1MH, IsoConductorOr, IsomorphicConductor};
+use coremem::meas;
 use coremem::real::{self, Real as _};
 use coremem::sim::spirv::{self, SpirvSim};
 use coremem::sim::units::Seconds;
-use coremem::mat::{Ferroxcube3R1MH, IsoConductorOr, IsomorphicConductor};
+use coremem::stim::{CurlStimulus, Gated, Sinusoid1, TimeVarying as _};
 use coremem::Driver;
 
 type R = real::R32;
 type Mat = IsoConductorOr<R, Ferroxcube3R1MH>;
+// type Backend = spirv::CpuBackend;
 type Backend = spirv::WgpuBackend;
 
 fn main() {
     coremem::init_logging();
     coremem::init_debug();
     let um = |n| n as f32 * 1e-6;
-    let ns = |n| n as f32 * 1e-9;
+    // let ns = |n| n as f32 * 1e-9;
+    let ps = |n| n as f32 * 1e-12;
     let feat_size = um(10);
 
+    let input_magnitude = 1.0e9;
+    let clock_phase_duration = ps(1000);
+
     let s_major = um(160);
     let s_minor = um(30);
     let io_major = um(80);
@@ -64,42 +71,106 @@ fn main() {
     let sx = |n| um((n+1) * 400);
     let sy = um(400);
     let sz = um(280);
-    let couplingx = |n| sx(n) - um(200);
+    let couplingx = |n| sx(n) + um(200);
 
     let sim_bounds = Meters::new(sx(4), sy * 2.0, sz * 2.0);
     let sim_padding = Meters::new(um(80), um(80), um(80));
-    let duration = Seconds(ns(1));
 
     let drive0 = Torus::new_xz(Meters::new(sx(0) - s_major, sy, sz), io_major, io_minor);
     let sense3 = Torus::new_xz(Meters::new(sx(3) + s_major, sy, sz), io_major, io_minor);
     let ctl = |n| Torus::new_yz(Meters::new(sx(n), sy + s_major, sz), io_major, io_minor);
     let s = |n| Torus::new_xy(Meters::new(sx(n), sy, sz), s_major, s_minor);
+    // coupling(n) is the wire which couples core n into core n+1
     let coupling = |n| Torus::new_xz(Meters::new(couplingx(n), sy, sz), coupling_major, coupling_minor);
 
+    let input = |region: &Torus, cycle: u32, direction: i32| {
+        let area = region.cross_section();
+        let amp = direction as f32 * input_magnitude / area;
+        let start = clock_phase_duration * cycle as f32;
+        let wave = Gated::new(amp, start, start + clock_phase_duration);
+        // let wave = Sinusoid1::from_wavelength(direction as f32 * input_magnitude / area, clock_phase_duration * 2.0)
+        //     .half_cycle()
+        //     .shifted(clock_phase_duration * cycle as f32);
+        CurlStimulus::new(
+            region.clone(),
+            wave.clone(),
+            region.center(),
+            region.axis(),
+        )
+    };
+
     let wire_mat = IsomorphicConductor::new(1e6f32.cast::<R>());
-    let ferro_mat = wire_mat;
+    // let ferro_mat = wire_mat;
-    // let ferro_mat = Ferroxcube3R1MH::new(); // uncomment when ready to simulate for real
+    let ferro_mat = Ferroxcube3R1MH::new();
 
     let mut driver = Driver::new(SpirvSim::<R, Mat, Backend>::new(
         sim_bounds.to_index(feat_size), feat_size,
     ));
     driver.add_classical_boundary_explicit::<R, _>(sim_padding);
+
+    //////// create the wires and toroids
     driver.fill_region(&drive0, wire_mat);
     driver.fill_region(&sense3, wire_mat);
     for core in 0..4 {
         driver.fill_region(&s(core), ferro_mat);
         driver.fill_region(&ctl(core), wire_mat);
-        if core != 0 {
+        if core != 3 {
             driver.fill_region(&coupling(core), wire_mat);
         }
     }
 
-    let prefix = "out/applications/multi_core_inverter/0/";
+    //////// monitor some measurements
+    // driver.add_measurement(meas::CurrentLoop::new("drv0", drive0.clone()));
+    for core in 0..4 {
+        driver.add_measurement(meas::CurrentLoop::new(
+            &format!("drive{}", core),
+            ctl(core),
+        ));
+    }
+    for core in 0..3 {
+        driver.add_measurement(meas::CurrentLoop::new(
+            &format!("sense{}", core),
+            coupling(core),
+        ));
+    }
+    for core in 0..4 {
+        driver.add_measurement(meas::MagneticLoop::new(
+            &format!("state{}", core),
+            s(core),
+        ));
+    }
+    driver.add_measurement(meas::CurrentLoop::new("sense3", sense3.clone()));
+
+    //////// create the stimuli
+    // CTL{n} effectively leads CTL{n-1}
+    // or: at time t, CTL{n} is at cycle[t+n]
+    // where cycle[t] is defined by CTL[0](t):
+    //   0, +Vdd, +Vdd, +Vdd
+    // TODO: this is wrong (as is the diagram in the blog)! CTL0, being an inverter,
+    //   needs -Vdd to recharge to +polarization
+    let cycles = 1;
+    let duration = Seconds(clock_phase_duration * (cycles + 2) as f32);
+    for cycle in 0..cycles {
+        for core in 0..1 { // TODO: core 0
+            let dir = 1;
+            //let dir = if (cycle+core) % 4 == 0 {
+            //    0
+            //} else {
+            //    1
+            //};
+            if dir != 0 {
+                // micro opt/safety: don't place zero-magnitude stimuli
+                driver.add_stimulus(input(&ctl(core), cycle, dir));
+            }
+        }
+    }
+
+    let prefix = "out/applications/multi_core_inverter/2/";
     let _ = std::fs::create_dir_all(&prefix);
     // driver.add_state_file(&*format!("{}state.bc", prefix), 9600);
-    driver.add_serializer_renderer(&*format!("{}frame-", prefix), 36000, None);
+    driver.add_serializer_renderer(&*format!("{}frame-", prefix), 400, None);
-    driver.add_csv_renderer(&*format!("{}meas.csv", prefix), 400, None);
+    driver.add_csv_renderer(&*format!("{}meas.csv", prefix), 100, None);
-    driver.set_steps_per_stim(200);
+    driver.set_steps_per_stim(100);
 
     driver.step_until(duration);
 }