How to debug X-Cube-AWS in IAR

[Sukanya MEENACHI SUNDARAM]

The objective of this article is to instruct a user to be able to debug X-Cube-AWS effectively in IAR. Debugging helps the user understand the program flow and figure out which line of code could be causing any sort of deviance from normalcy.

1. Pre-requisites 

• B-L4S5I-IOT01A 
  

A Micro USB Cable is used to power and debug.  

2. Software Tools 

• IAR 

• Download the X-CUBE-AWS package . You may need to create an account on st.com for the same. 

3. Steps 

1. Extract the package directly onto the C drive

   (if the file path is too long it will generate build errors). Open IAR and Click on File->Open Workspace and open the following and navigate to the  Project.eww files in the following paths: 

• C:\STM32CubeExpansion_Cloud_AWS_V2.0.0\Projects\B-L4S5I-IOT01A\Applications\BootLoader_STSAFE\2_Images_SECoreBin\EWARM 

• C:\STM32CubeExpansion_Cloud_AWS_V2.0.0\Projects\B-L4S5I-IOT01A\Applications\BootLoader_STSAFE\2_Images_SBSFU\EWARM 

• C:\STM32CubeExpansion_Cloud_AWS_V2.0.0\Projects\B-L4S5I-IOT01A\Applications\BootLoader_STSAFE\STSAFE_Provisioning\EWARM 

• C:\STM32CubeExpansion_Cloud_AWS_V2.0.0\Projects\B-L4S5I-IOT01A\Applications\Cloud\aws_demos\EWARM 

2. Click on Open  

3. Build the projects

   in the following order by clicking on the build icon -  2_Images_SECoreBin,   2_Images_SBSFU, STSAFE_Provisioning and then B-L4S5-IOT01_aws_demos . Note that a wrong compilation order will generate build errors.  

4. Go to the project explorer and drag and drop the binary 

   (C:\STM32CubeExpansion_Cloud_AWS_V2.0.0\ Projects\B-L4S5I-IOT01A\Applications\Cloud\aws_demos\EWARM\Debug) to the board (eg: DIS_L4S5VI).       
    

5. Go back to the IDE

   You can place a breakpoint as shown below by clicking right next to the line number.  
   

6. Make sure that the board is connected to your laptop

   Click on Project -> Debug without Downloading.   
   

Or, you can also click on the following icon.  

7. Step into the function to see the flow of the program from the toolbar: 

   
   

8. Step over to the next line of code using the following icon:  

   

 4. Additional material  

• IAR:  https://www.iar.com/products/architectures/arm/iar-embedded-workbench-for-arm/ 

• STM32L4S5 user and reference manual: https: www.st.com/en/evaluation-tools/b-l4s5i-iot01a.html#documentation