介绍

在此示例中，您将学习如何配置Simulink模型以运行循环的处理器（PIL）仿真。万博1manbetx在PIL模拟中，生成的代码在NXP FRDM-KL25Z板上运行。将PIL模拟的结果传输到Simulink，以验证模拟的数值等效性和代码生成结果。万博1manbetxPIL验证过程是开发周期的关键部分，以确保部署代码的行为与设计相匹配。

This example introduces the Simulink code generation and verification workflow by showing you how to:

Prerequisites

We recommend completingGetting Started with Simulink Coder Support Package for NXP FRDM-KL25Z Board.

Required Products

Embedded Coder

Required Hardware

To run this example you will need the following hardware:

On Mac:

On Windows:

Note:

OS Specific Limitations

On Mac:

External mode simulation is supported only through UART1 or UART2.

On Windows:

External mode simulation is supported through all UART communication interfaces.

Task 1 - Choose a Serial Communication Interface for PIL Simulation

这Simulink Coder Support Package for NXP FRDM-KL25Z Board supports three different serial communication interfaces for PIL: UART0, UART1, and UART2. Please note that, on Mac platforms, PIL simulation over UART0 is supported only on Mac version 'El Capitan'.

这UART0 serial communication interface is accessible through either the mini USB port labeled withopenSDAon the NXP FRDM-KL25Z board or the onboard GPIO pins for UART0 . Using UART0 via the mini USB port does not require any additional cables or hardware, besides a USB type A to Mini-B cable that is used to connect the NXP FRDM-KL25Z board to the host computer. To use the UART0 through the other GPIO pins on NXP FRDM-KL25Z board, additional hardware, for example, a USB TTL-232R adapter.

这UART1 and UART2 serial communication interfaces are accessible only through pins on the NXP FRDM-KL25Z board. Using these interfaces requires additional hardware, for example, a USB TTL-232R adapter, to perform PIL simulations.

1.Choose a serial communication interface using the steps below:

2.Choose the Tx and Rx GPIO pins for the selected serial communication interface:

3.Connect to the hardware. Follow the steps below based on the serial interface you selected:

For UART0:

For UART1:

For UART2:

4.Once you complete the steps above, a new serial COM port should be available for use on your host computer. To find the COM port associated with your adapter cable, follow the steps below:

On Windows:

On Mac:

5.打开在NXP FRDM-KL25Z板上配置为代码生成的模型。In配置参数>硬件实现>目标硬件资源> PIL>串行端口, enter theSerial port在上一步中指出的带有COM端口号的字段。

例如，在Windows上输入COM27在里面Serial portfield, while on Mac enter/Dev/cu.usbmodem1442.

open_system（'freedomboard_pil_block');

Task 2 - Verify the generated code for a subsystem using a PIL block

This example shows how to use a PIL block for subsystem code verification. With this approach:

1.Open thePIL Blockmodel. This model is configured for theNXP FRDM-KL25Ztarget. The objective here is to create a PIL block out of theControllersubsystem that you will run on the NXP FRDM-KL25Z board.

2.Choose a PIL communication interface by following the steps inTask 1 - Choose a Serial Communication Interface for PIL Simulationof this example.

3.请按照以下步骤启用PIL：

Note： 确保这件事使用嵌入式编码器功能is enabled underHardware Implementation>Advanced parameters

一个。去Modeling标签和按ctrl+eto open Configuration Parameters dialog box.

bGo toCode Generation>Verification>Advanced parameters和selectPIL.

4.请按照以下步骤为其创建一个PIL块Controllersubsystem:

一个。右键单击Controllersubsystem and selectDeploy this Subsystem to Hardware.

b.在里面建造code for SubsystemController对话框，单击建造.

5.Follow the below steps to run the PIL simulation:

6.You can switch between the original and PIL block subsystems by double clicking on theManual Switchblock. Double click on theNumerical Differencesblock to see the difference between the simulatedControllersubsystem and the PIL block running on the NXP FRDM-KL25Z board.

open_system（'freedomboard_model_pil_block');

任务3-使用PIL验证引用的模型代码

此示例显示了如何通过运行PIL模拟来验证引用模型的生成代码。使用这种方法：

1.Open the模型块PILmodel. This model is configured forNXP FRDM-KL25Ztarget. The model contains two Model blocks that both point at the same referenced model. You will configure one of the Model blocks to run in PIL simulation mode and the other in normal mode.

2.Choose a PIL serial communication interface for the模型块PIL和Referenced model通过遵循步骤Task 1 - Choose a Serial Communication Interface for PIL Simulationin this example.

3.Follow the below steps to configure and run theCounterAModel block in PIL mode:

一个。右键单击块CounterA和select块参数（模型Reference）

b.在里面CounterAblock parameter, Select仿真模式as循环处理器（PIL）

c.Go to模拟tab andRun

4.When the model starts running,Scope1displays the PIL simulation output running on the NXP FRDM-KL25Z board whileScope2shows the normal mode simulation output.

open_system（'freedomboard_top_model_pil');

Task 4 - Verify top model code using PIL

This example shows how to verify the generated code for a model by running a PIL simulation. With this approach:

1.Open theTop Model PILmodel. This model is configured for theFreecale FRDM-KL25Ztarget.

2.Choose a PIL serial communication interface by following the steps inTask 1 - Choose a Serial Communication Interface for PIL Simulationin this example.

3.Go toApps标签和搜索SIL/PIL.

4.Select循环处理器（PIL）from theSIL/PILModedrop-down and clickRun Verification.

5.PIL模拟完成后，logsOut在基本工作区中创建变量。这logsOutdata contains PIL simulation results. You can access the logged data for signalscount_a和count_busing the following commands: