TOOLSTICK540DC Silicon Laboratories Inc, TOOLSTICK540DC Datasheet - Page 9

• Manufacturer Part Number: TOOLSTICK540DC
• Description: DAUGHTER CARD TOOLSTICK F540
• Manufacturer: Silicon Laboratories Inc
• Series: ToolStickr
• Type: MCUr

Specifications of TOOLSTICK540DC

• Contents: Daughter Card
• Processor To Be Evaluated: C8051F54x
• Processor Series: C8051F54x
• Interface Type: USB
• Operating Supply Voltage: 2.7 V to 3.6 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: C8051F54x
• For Use With: 336-1345 - TOOLSTICK BASE ADAPTER336-1182 - ADAPTER USB DEBUG FOR C8051FXXX
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1717

6.5. Enabling and Using Watch Windows
The Debug Windows in the View menu are used to view and modify hardware registers. To view and modify
variables in code, the IDE provides Watch Windows. Just as with register debug windows, variables in the watch
windows are updated each time the device is halted. This section of the User’s Guide explains how to add a
variable to the watch window and modify the variable. In the F540_FeaturesDemo example code, the variable
Num_LED_Flashes is a counter that stores the number of times the LED blinks.
1. If the device is running, stop execution using the “Stop” button or use the Debug  Stop menu option.
2. In the File View on the left-hand side of the IDE, double-click on F540DC_FeaturesDemo.c to open the source
3. Scroll to the Timer3_ISR() function and right-click on the variable “Num_LED_Flashes.” In the context menu
4. Start and stop the device a few times. See that the value of the Num_LED_Flashes is incremented each time
5. When the device is halted, click on the value field in the watch window and change the value to 0. Then click the
6. Start and stop the device a few times to watch the variable increment starting at 0.
Changing the values of variables does not require recompiling the code and redownloading the firmware. At any
time, the device can be halted and the values of the variables can be changed. The firmware will continue
execution using the new values.
file.
that appears, select “Add Num_LED_Flashes to Watch” and then choose “Default  Default Type.” On the
right-hand portion of the IDE, the watch window appears and the variable is added. The current value of the
variable is shown to the right of the name.
the LED blinks.
Refresh button or select Debug  Refresh to write the new value to the device.
Rev. 0.1
ToolStick-F540DC
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