You cannot simulate the stm32 software for mdk4 or later versions.

First download the file http://dl.vmall.com/c0zq9mx4a3

Decompress the downloaded file to obtain

 

1. First, follow the normal method to establish the stm32 Project

2. Disable MDK

3. Replace the project file pai_leds.uvproj in step 1 with the downloaded pai_xxxx.uvproj and change the name to your project name.

4. Double-click the project file pai_leds.uvproj to open the project and open the "target options" option.

 

Switch to output option

 

 

Change the name in the above box to your project name

Switch to the debug option

 

Select

 

After compilation, you can perform software simulation.