Silicon Laboratories F321DC - Manual (Page 10)

ToolStick-F321DC
10 Rev. 0.1
6.6. Setting and Running to Breakpoints
The Silicon Laboratories microcontroller devices support up to four hardware breakpoints. A breakpoint is
associated with a specific line of code. When the processor reaches a hardware breakpoint, the code execution
stops, and the IDE refreshes all debug and watch windows. The on-chip debug hardware allows for breakpoints to
be placed on any line of executable code, including code in Interrupt Service Routines. This section provides steps
to set a breakpoint on the line of source code that increments the Num_LED_Flashes variable.
1. If the device is running, stop execution using the "Stop" button or use the Debug
→Stop menu option.
2. Scroll to the ADC0_ISR function and right-click on the variable "Num_LED_Flashes". In the context menu that
appears, select "Insert/Remove Breakpoint." On the left side of the line in the editor window, a red circle is
added to indicate a breakpoint is placed on the source line.
3. Click the "Go" button or select the Debug →Go menu option.
4. After a short time, the IDE will show that the device is halted. A blue line will be placed in the editor window to
indicate where the code execution has stopped.
5. Start and stop the processor a few more times. Notice that the LED blinks once for every time the processor is
started and the Num_LED_Flashes variable also increments by one.