![](images/silicon_labs.png)
Silicon Labs SiM3 CPU Support Package
This package contains project templates and system files for the Silicon Labs SiM3.
CrossWorks Version 3 Installation Instructions
- To install this support package
-
- Click the Tools > Package Manager menu option to open the package manager window.
- Right click on the Silicon Labs SiM3 CPU Support Package entry and select Install Selected Packages.
- Click Next to take you to the summary page.
- Click Next to install the package.
- Click Finish to close the package manager window.
- Click the Tools > Show Installed Packages.
- Click on the Silicon Labs SiM3 CPU Support Package link to view the package and its contents.
- To manually install this support package
-
- If you have not done so already, follow the CMSIS 3 Support Package and CrossWorks Tasking Library Package installation instructions.
- Download the file SiM3.hzq using your web browser.
- Click the Tools > Manually Install Packages menu option.
- Select the file you have just downloaded to install the package.
- Click the Tools > Show Installed Packages.
- Click on the Silicon Labs SiM3 CPU Support Package link to view the package and its contents.
- To install this support package using other versions
Release Notes
3.1
- Watchdog disable.
3.0
- Initial Release.
Documentation
Creating SiM3 Projects
To create a new SiM3 project
- Select the File > New > New Project menu item.
- Select the appropriate Generic SiM3 from the Categories list.
- Select the required project template type from the Templates list.
- Set the required project name and location directory.
- Click OK.
To build and debug an application the runs in Flash memory
- Select the project to work on by using the Project > Set Active Project menu option.
- Select the configuration you require by using the Build > Set Active Build Configuration menu option.
- Right click on the project node in the project explorer and select the Flash placement property.
- Build the project by using the Build > Build Project menu option.
- Connect to the appropriate target in the target window.
- Download and start debugging the current project by using Debug > Start Debugging.
To make the application startup from reset
- Right click on the project node in the project explorer and select Properties...
- In the properties window scroll down to the Preprocessor Options section.
- Type STARTUP_FROM_RESET into the Preprocessor Definitions property editor.
SiM3 Project Specifics
Target Processor
Once a project has been created you can select different target processors by right clicking on the project node in the project explorer and selecting the Target Processor entry.
Selecting the target processor will specify the memory map that is used for the build and debug. You can view the selected memory map by right clicking on the project node in the project explorer and selecting Edit Memory Map.
Section Placement
CrossStudio for ARM supports SiM3 projects running applications in a number of different memory configurations. You can select the memory configuration you require by right clicking on the project node in the project explorer and selecting the Placement property.
For SiM3 projects the set of placements are:
- Flash application runs in internal Flash memory.
- Flash Vectors In RAM application run in internal Flash memory exception vectors are copied to RAM memory.
- Flash Copy To RAM application starts in internal flash and copies itself to run internal RAM memory.
- RAM application runs internal RAM memory.
Stack and Heap Sizes
The stack and heap sizes are set to be 128 bytes by default when a project is created. It is likely that you will need to change these values when developing applications to run on the larger of the SiM3 processors.
Target Startup Code
The startup code SiM3_Startup.s is common to all SiM3 processors. There are a set of preprocessor defines that configure the startup code and are documented in the startup file itself. The startup code calls out to a weak symbol SystemInit with the stack pointer set to the top of the first block of SRAM. The SystemInit function can be used to set the CPU clock or configure any external memories prior to the C initialisation code as such it cannot access initialised static data.
The startup code declares symoblic names (and weak implementations) for each interrupt service routine, for example the CMP0_IRQHandler function will be called when this interrupt occurs. If you are porting code that has application specific interrupt service routine names then you can use the preprocessor definitions to rename the symbol for example CMP0_IRQHandler=MyCMP0_IRQHandlerISR.
Target Reset Script
The reset script SiM3_Target.js is used by the debugger to reset the target board.
Memory Simulator
An SiM3 memory simulator is provided that simulates the memories of the various devices. The memory simulation parameter (which is set by the Target Processor selection) specifies the device name, the size of the internal Flash and RAM memories.