fmi-rs 0.1.0

Functional Mock-up Interface (FMI) for Rust
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151

use std::sync::Arc;

use crate::{
    fmi2::{
        self, CS, FMU2,
        types::{fmi2Status, fmi2StatusKind},
    },
    sim::{
        SimulationError,
        fmi2::{
            SimulationSettings, call, input::StaticInput, read_initial_fmu_state,
            recorder::Recorder, set_start_values, write_final_fmu_state,
        },
        next_communication_point, next_regular_point, relative_eq, relative_lt,
        validate_simulation_steps,
    },
};

pub fn simulate(
    settings: &SimulationSettings,
    input: Option<Arc<StaticInput>>,
    recorder: Arc<Recorder>,
) -> Result<(), SimulationError> {
    let start_time = settings.start_time;
    let stop_time = settings.stop_time;
    let set_stop_time = settings.set_stop_time;
    let output_interval = settings.output_interval;
    let relative_tolerance = settings.tolerance;

    validate_simulation_steps(start_time, stop_time, output_interval, relative_tolerance)
        .map_err(SimulationError::Parameter)?;

    let mut time = start_time;

    let co_simulation = settings
        .model_description
        .coSimulation
        .as_ref()
        .ok_or(SimulationError::InterfaceType)?;

    let can_handle_variable_communication_step_size =
        co_simulation.canHandleVariableCommunicationStepSize;

    let logger = if let Some(log_file) = &settings.log_file {
        fmi2::log::DefaultLogger::from_path(log_file).map_err(SimulationError::io(&log_file))?
    } else {
        fmi2::log::DefaultLogger::default()
    };

    let fmu = FMU2::<CS>::new(
        &settings.unzipdir,
        &co_simulation.modelIdentifier,
        &settings.model_description.modelName,
        &settings.model_description.guid,
        false,
        settings.logging_on,
        settings.log_fmi_calls,
        Box::new(logger),
        !co_simulation.canNotUseMemoryManagementFunctions,
    )?;

    if let Some(path) = &settings.initial_fmu_state_file {
        read_initial_fmu_state(&fmu, path)?;
        set_start_values(&settings.start_values, &settings.model_description, &fmu)?;
    } else {
        set_start_values(&settings.start_values, &settings.model_description, &fmu)?;

        call(fmu.setupExperiment(
            if settings.set_tolerance {
                Some(settings.tolerance)
            } else {
                None
            },
            time,
            if set_stop_time { Some(stop_time) } else { None },
        ))?;

        call(fmu.enterInitializationMode())?;

        if let Some(input) = &input {
            input.set_discrete_inputs(time, &fmu)?;
            input.set_continuous_inputs(time, true, &fmu)?;
        }

        call(fmu.exitInitializationMode())?;
    }

    recorder.sample(time, &fmu)?;

    let mut n_steps = 0;

    while relative_lt(time, stop_time, relative_tolerance) {
        let next_regular_point = next_regular_point(
            settings.log_time_scale,
            start_time,
            output_interval,
            n_steps,
        )?;

        let next_input_event_time = input.as_ref().and_then(|i| i.next_event_time(time));

        let next_communication_point = if can_handle_variable_communication_step_size {
            next_communication_point(
                next_regular_point,
                next_input_event_time,
                None,
                stop_time,
                relative_tolerance,
            )
        } else {
            next_regular_point
        };

        let communication_step_size = next_communication_point - time;

        if let Some(input) = &input {
            input.set_discrete_inputs(time, &fmu)?;
            input.set_continuous_inputs(time, true, &fmu)?;
        }

        let do_step_status = fmu.doStep(time, communication_step_size, 0);

        let mut terminate_simulation = 0;

        if do_step_status == fmi2Status::Discard {
            call(fmu.getRealStatus(&fmi2StatusKind::LastSuccessfulTime, &mut time))?;
            call(fmu.getBooleanStatus(&fmi2StatusKind::Terminated, &mut terminate_simulation))?;
        } else {
            call(do_step_status)?;
            time = next_communication_point;
        }

        if relative_eq(time, next_communication_point, relative_tolerance) {
            n_steps = n_steps.saturating_add(1);
        }

        recorder.sample(time, &fmu)?;

        if terminate_simulation != 0 {
            break;
        }
    }

    if let Some(path) = &settings.final_fmu_state_file {
        write_final_fmu_state(&fmu, path)?;
    }

    call(fmu.terminate())?;

    Ok(())
}