Embedded Coder for MCU deployment in Simulink - Mini Project: Build & Apply

Embedded Coder for MCU Deployment

📖 Scenario: You are working on a small embedded system project where you want to deploy a simple control algorithm to a microcontroller unit (MCU). You will use Embedded Coder in Simulink to generate code that can run on the MCU.

🎯 Goal: Build a simple Simulink model, configure Embedded Coder for MCU code generation, and generate the C code for deployment.

📋 What You'll Learn

Create a Simulink model with a Gain block and a Constant block

Set a configuration parameter for the MCU target

Generate Embedded Coder code for the model

Display the generated code file names

💡 Why This Matters

🌍 Real World

Embedded Coder is used to automatically generate efficient C code from Simulink models for embedded systems like microcontrollers in automotive, aerospace, and consumer electronics.

💼 Career

Understanding Embedded Coder and MCU deployment is essential for embedded software engineers and control system developers working on real-time applications.

1

Create a simple Simulink model

Create a Simulink model called simple_mcu_model with a Constant block set to value 5 and a Gain block with gain 3. Connect the Constant block output to the Gain block input.

Simulink

# Your code here to create the model, add blocks, set parameters, and connect blocks

Hint

Use new_system to create the model, add_block to add blocks, and add_line to connect them.

2

Configure Embedded Coder for MCU target

Set the model configuration parameter SystemTargetFile to ert.tlc to enable Embedded Coder code generation for MCU deployment.

Simulink

simple_mcu_model = 'simple_mcu_model';
new_system(simple_mcu_model);
open_system(simple_mcu_model);
add_block('simulink/Sources/Constant', [simple_mcu_model '/Constant'], 'Value', '5');
add_block('simulink/Math Operations/Gain', [simple_mcu_model '/Gain'], 'Gain', '3');
add_line(simple_mcu_model, 'Constant/1', 'Gain/1');
# Set SystemTargetFile to 'ert.tlc' for Embedded Coder
# Your code here

Hint

Use set_param with the model name and 'SystemTargetFile' parameter.

3

Generate Embedded Coder code

Use the rtwbuild function with the model name simple_mcu_model to generate the Embedded Coder code for the MCU.

Simulink

simple_mcu_model = 'simple_mcu_model';
new_system(simple_mcu_model);
open_system(simple_mcu_model);
add_block('simulink/Sources/Constant', [simple_mcu_model '/Constant'], 'Value', '5');
add_block('simulink/Math Operations/Gain', [simple_mcu_model '/Gain'], 'Gain', '3');
add_line(simple_mcu_model, 'Constant/1', 'Gain/1');
set_param(simple_mcu_model, 'SystemTargetFile', 'ert.tlc');
# Generate code using rtwbuild
# Your code here

Hint

Call rtwbuild with the model name to build the code.

4

Display generated code files

Use dir to list the generated C code files in the folder simple_mcu_model_ert_rtw and print the file names.

Simulink

simple_mcu_model = 'simple_mcu_model';
new_system(simple_mcu_model);
open_system(simple_mcu_model);
add_block('simulink/Sources/Constant', [simple_mcu_model '/Constant'], 'Value', '5');
add_block('simulink/Math Operations/Gain', [simple_mcu_model '/Gain'], 'Gain', '3');
add_line(simple_mcu_model, 'Constant/1', 'Gain/1');
set_param(simple_mcu_model, 'SystemTargetFile', 'ert.tlc');
rtwbuild(simple_mcu_model);
# List and print generated C code files
# Your code here

Hint

Use dir to get files and disp to print their names.

Practice

1. What is the main purpose of Embedded Coder in Simulink for MCU deployment?

easy

A. To design graphical user interfaces for embedded systems

B. To simulate microcontroller hardware behavior

C. To convert Simulink models into C code for microcontrollers

D. To debug C code generated from Simulink models

Solution

1. Step 1: Understand Embedded Coder's function

   Embedded Coder generates C code from Simulink models specifically for microcontrollers.

2. Step 2: Compare options with this function

   Only To convert Simulink models into C code for microcontrollers describes this conversion process correctly.

3. Final Answer:

   To convert Simulink models into C code for microcontrollers -> Option C

4. Quick Check:

   Embedded Coder = Code generation for MCU [OK]

Hint: Embedded Coder = Simulink to C code for MCUs [OK]

Common Mistakes:

• Confusing simulation with code generation
• Thinking Embedded Coder designs GUIs
• Assuming it debugs code directly

2. Which of the following is the correct way to enable code generation in Simulink for Embedded Coder?

easy

A. Set the model configuration parameter 'System target file' to 'ert.tlc'

B. Set the model configuration parameter 'Solver' to 'Fixed-step'

C. Set the model configuration parameter 'Simulation mode' to 'Normal'

D. Set the model configuration parameter 'Data import/export' to 'on'

Solution

1. Step 1: Identify code generation setting

   Embedded Coder requires setting 'System target file' to 'ert.tlc' to generate code.

2. Step 2: Verify other options

   Other parameters relate to simulation or data handling, not code generation.

3. Final Answer:

   Set the model configuration parameter 'System target file' to 'ert.tlc' -> Option A

4. Quick Check:

   Code generation target = ert.tlc [OK]

Hint: Use 'ert.tlc' for Embedded Coder code generation [OK]

Common Mistakes:

• Confusing solver settings with code generation
• Changing simulation mode instead of target file
• Assuming data import/export affects code generation

3. Given the following Simulink model configuration snippet for Embedded Coder:

modelConfig.set('SystemTargetFile', 'ert.tlc');
modelConfig.set('HardwareBoard', 'STM32F4-Discovery');
modelConfig.set('GenerateReport', true);

What will be the result of running code generation?

medium

A. Simulation runs only, no code generated

B. Code generated but report is not created

C. Error due to unsupported hardware board

D. C code generated for STM32F4-Discovery with a detailed report

Solution

1. Step 1: Analyze configuration settings

   'SystemTargetFile' is set to 'ert.tlc' enabling code generation. 'HardwareBoard' specifies STM32F4-Discovery. 'GenerateReport' is true.

2. Step 2: Determine expected output

   Code will be generated for STM32F4-Discovery and a detailed report will be created.

3. Final Answer:

   C code generated for STM32F4-Discovery with a detailed report -> Option D

4. Quick Check:

   ert.tlc + board + report = code + report [OK]

Hint: ert.tlc + board + report true = code + report [OK]

Common Mistakes:

• Assuming simulation only without code generation
• Thinking hardware board is unsupported
• Ignoring the report generation flag

4. You try to generate code using Embedded Coder but get an error: "Target file 'ert.tlc' not found." What is the most likely cause?

medium

A. The Embedded Coder product is not installed or licensed

B. The Simulink model has syntax errors

C. The hardware board is not selected

D. The solver is set to variable-step

Solution

1. Step 1: Understand the error message

   "Target file 'ert.tlc' not found" means the code generation target file is missing.

2. Step 2: Identify cause of missing target file

   This usually happens if Embedded Coder is not installed or licensed, so the target file is unavailable.

3. Final Answer:

   The Embedded Coder product is not installed or licensed -> Option A

4. Quick Check:

   Missing ert.tlc = missing Embedded Coder [OK]

Hint: Missing ert.tlc means Embedded Coder not installed [OK]

Common Mistakes:

• Blaming model syntax errors
• Ignoring product installation status
• Thinking solver setting causes this error

5. You want to deploy a Simulink model to an MCU with limited RAM and flash memory. Which Embedded Coder feature helps optimize the generated code size?

hard

A. Set the solver to variable-step to save memory

B. Use the 'Optimization' settings to enable 'Reduce RAM usage' and 'Eliminate dead code'

C. Increase the sample time to reduce execution frequency

D. Disable code generation report to speed up build

Solution

1. Step 1: Identify optimization features for code size

   Embedded Coder provides optimization settings like 'Reduce RAM usage' and 'Eliminate dead code' to minimize code size.

2. Step 2: Evaluate other options

   Increasing sample time affects execution but not code size. Solver settings and report generation do not reduce code size.

3. Final Answer:

   Use the 'Optimization' settings to enable 'Reduce RAM usage' and 'Eliminate dead code' -> Option B

4. Quick Check:

   Optimization settings = smaller code size [OK]

Hint: Enable optimization to reduce RAM and dead code [OK]

Common Mistakes:

• Confusing execution frequency with code size
• Thinking solver type affects memory usage
• Disabling reports does not reduce code size