基于时间的调度
为依赖基于时间的调度的算法设计模型，并为其生成代码。评估连续和离散模块的使用情况。为以一个或多个采样率运行的模型使用定步长求解器。在单任务和多任务执行模式之间选择。识别和处理模型中的采样率转换。
主题
- 基于时间的调度和代码生成
在设计用于代码生成的模型时，要考虑连续和离散模块的使用、采样时间、多速率模型的速率转换、离散化，以及在单任务模式和多任务模式之间进行选择。
- Periodic and Aperiodic Function Interfaces
Generate callable entry-point functions for the algorithm represented by a top model.
- Configure Time-Based Scheduling
Configure the solver type, solver, fixed-step size, periodic sample time constraints, and solver diagnostics for code generation.
- Execution of Code Generated from a Model
Execute code generated from single-tasking and multitasking models for rapid-prototyping and embedded system run-time environments.
- Tasking Modes and Execution Order
Example that shows task execution order for blocks in a model when configured for single-tasking versus multitasking execution.
精选示例
Single-Rate Modeling (Bare Board, No OS)
Code generation for a single-rate discrete-time model configured for a bare-board target (one with no operating system).
Multirate Modeling in Single-Tasking Mode (Bare Board, No OS)
The code generated for a multirate discrete-time model configured for single-tasking on a bare-board target (one with no operating system).
Multirate Modeling in Multitasking Mode (Bare Board, No OS)
The code generated for a multirate discrete-time model configured for a multitasking bare-board target (one with no operating system).
Multirate Modeling in Multitasking Mode (VxWorks® OS)
Generates code for a multirate discrete-time model configured for a multitasking operating system target (VxWorks®). The model contains two sample times. Inport block 1 and Inport block 2 specify 1-second and 2-second sample times, respectively, which are enforced by the setting of model configuration parameter Periodic sample time constraint. The solver is set for multitasking operation, which means a Rate Transition block is required to ensure that data integrity is enforced when the 1-second task preempts the 2-second task. Simulink® and the code generator enforce proper rate transitions. This model specifies an explicit Rate Transition block. Alternatively, you can instruct Simulink® to insert this block for you by setting model configuration parameter Automatically handle rate transition for data transfer.
