initialize c2d communication parameter

closes #2356

src/systems/clock_inference.jl

@@ -150,6 +150,7 @@ function generate_discrete_affect(syss, inputs, continuous_id, id_to_clock;
     param_to_idx = Dict{Any, Int}(reverse(en) for en in enumerate(appended_parameters))
     offset = length(appended_parameters)
     affect_funs = []
+    init_funs = []
     svs = []
     clocks = TimeDomain[]
     for (i, (sys, input)) in enumerate(zip(syss, inputs))
@@ -202,6 +203,14 @@ function generate_discrete_affect(syss, inputs, continuous_id, id_to_clock;
             push!(save_vec.args, :(p[$(input_offset + i)]))
         end
         empty_disc = isempty(disc_range)
+
+        disc_init = :(function (p, t)
+            d2c_obs = $disc_to_cont_obs
+            d2c_view = view(p, $disc_to_cont_idxs)
+            disc_state = view(p, $disc_range)
+            copyto!(d2c_view, d2c_obs(disc_state, p, t))
+        end)
+
         affect! = :(function (integrator, saved_values)
             @unpack u, p, t = integrator
             c2d_obs = $cont_to_disc_obs
@@ -223,15 +232,20 @@ function generate_discrete_affect(syss, inputs, continuous_id, id_to_clock;
         end)
         sv = SavedValues(Float64, Vector{Float64})
         push!(affect_funs, affect!)
+        push!(init_funs, disc_init)
         push!(svs, sv)
     end
     if eval_expression
         affects = map(affect_funs) do a
             drop_expr(@RuntimeGeneratedFunction(eval_module, toexpr(LiteralExpr(a))))
         end
+        inits = map(init_funs) do a
+            drop_expr(@RuntimeGeneratedFunction(eval_module, toexpr(LiteralExpr(a))))
+        end
     else
         affects = map(a -> toexpr(LiteralExpr(a)), affect_funs)
+        inits = map(a -> toexpr(LiteralExpr(a)), init_funs)
     end
     defaults = Dict{Any, Any}(v => 0.0 for v in Iterators.flatten(inputs))
-    return affects, clocks, svs, appended_parameters, defaults
+    return affects, inits, clocks, svs, appended_parameters, defaults
 end

src/systems/diffeqs/abstractodesystem.jl

@@ -938,8 +938,9 @@ function DiffEqBase.ODEProblem{iip, specialize}(sys::AbstractODESystem, u0map =
         has_difference = has_difference,
         check_length, kwargs...)
     cbs = process_events(sys; callback, has_difference, kwargs...)
+    inits = []
     if has_discrete_subsystems(sys) && (dss = get_discrete_subsystems(sys)) !== nothing
-        affects, clocks, svs = ModelingToolkit.generate_discrete_affect(dss...)
+        affects, inits, clocks, svs = ModelingToolkit.generate_discrete_affect(dss...)
         discrete_cbs = map(affects, clocks, svs) do affect, clock, sv
             if clock isa Clock
                 PeriodicCallback(DiscreteSaveAffect(affect, sv), clock.dt)
@@ -969,7 +970,13 @@ function DiffEqBase.ODEProblem{iip, specialize}(sys::AbstractODESystem, u0map =
     if svs !== nothing
         kwargs1 = merge(kwargs1, (disc_saved_values = svs,))
     end
-    ODEProblem{iip}(f, u0, tspan, p, pt; kwargs1..., kwargs...)
+    prob = ODEProblem{iip}(f, u0, tspan, p, pt; kwargs1..., kwargs...)
+    if !isempty(inits)
+        for init in inits
+            init(prob.p, tspan[1])
+        end
+    end
+    prob
 end
 get_callback(prob::ODEProblem) = prob.kwargs[:callback]
 
@@ -1038,8 +1045,9 @@ function DiffEqBase.DDEProblem{iip}(sys::AbstractODESystem, u0map = [],
     h = h_oop
     u0 = h(p, tspan[1])
     cbs = process_events(sys; callback, has_difference, kwargs...)
+    inits = []
     if has_discrete_subsystems(sys) && (dss = get_discrete_subsystems(sys)) !== nothing
-        affects, clocks, svs = ModelingToolkit.generate_discrete_affect(dss...)
+        affects, inits, clocks, svs = ModelingToolkit.generate_discrete_affect(dss...)
         discrete_cbs = map(affects, clocks, svs) do affect, clock, sv
             if clock isa Clock
                 PeriodicCallback(DiscreteSaveAffect(affect, sv), clock.dt)
@@ -1068,7 +1076,13 @@ function DiffEqBase.DDEProblem{iip}(sys::AbstractODESystem, u0map = [],
     if svs !== nothing
         kwargs1 = merge(kwargs1, (disc_saved_values = svs,))
     end
-    DDEProblem{iip}(f, u0, h, tspan, p; kwargs1..., kwargs...)
+    prob = DDEProblem{iip}(f, u0, h, tspan, p; kwargs1..., kwargs...)
+    if !isempty(inits)
+        for init in inits
+            init(prob.p, tspan[1])
+        end
+    end
+    prob
 end
 
 function DiffEqBase.SDDEProblem(sys::AbstractODESystem, args...; kwargs...)
@@ -1092,8 +1106,9 @@ function DiffEqBase.SDDEProblem{iip}(sys::AbstractODESystem, u0map = [],
     h(p, t) = h_oop(p, t)
     u0 = h(p, tspan[1])
     cbs = process_events(sys; callback, has_difference, kwargs...)
+    inits = []
     if has_discrete_subsystems(sys) && (dss = get_discrete_subsystems(sys)) !== nothing
-        affects, clocks, svs = ModelingToolkit.generate_discrete_affect(dss...)
+        affects, inits, clocks, svs = ModelingToolkit.generate_discrete_affect(dss...)
         discrete_cbs = map(affects, clocks, svs) do affect, clock, sv
             if clock isa Clock
                 PeriodicCallback(DiscreteSaveAffect(affect, sv), clock.dt)
@@ -1133,8 +1148,15 @@ function DiffEqBase.SDDEProblem{iip}(sys::AbstractODESystem, u0map = [],
     else
         noise_rate_prototype = zeros(eltype(u0), size(noiseeqs))
     end
-    SDDEProblem{iip}(f, f.g, u0, h, tspan, p; noise_rate_prototype =
+    prob = SDDEProblem{iip}(f, f.g, u0, h, tspan, p;
+        noise_rate_prototype =
         noise_rate_prototype, kwargs1..., kwargs...)
+    if !isempty(inits)
+        for init in inits
+            init(prob.p, tspan[1])
+        end
+    end
+    prob
 end
 
 """

test/clock.jl

@@ -428,8 +428,7 @@ prob = ODEProblem(ssys,
     (0.0, 10.0),
     [model.controller.kp => 2.0; model.controller.ki => 2.0])
 
-@test_broken prob.p[9] == 1 # constant output * kp issue https://github.com/SciML/ModelingToolkit.jl/issues/2356
-prob.p[9] = 1 # constant output * kp
+@test prob.p[9] == 1 # constant output * kp issue https://github.com/SciML/ModelingToolkit.jl/issues/2356
 sol = solve(prob, Tsit5(), kwargshandle = KeywordArgSilent)
 # plot([sol(timevec .+ 1e-12, idxs=model.plant.output.u)  y])