5. Tune the CY3218-CAPEXP2 CapSense Express Board
Functional Description
When a finger moves along the capacitive slider, corresponding LEDs are lit in a circular pro-
gression. Additionally, pressing the pushbutton switch causes all of the LEDs to be lit.
Tuning Steps
5.1. Connect your computer to the CapSense test board ISSP Connector (J5)
using the
CY3240-I2USB Bridge Board and a USB cable. When connected correctly, the USB con-
nector on the CY3240-I2USB Bridge Board is visible when viewing the front of the
CY3218-CAPEXP2 board.
5.2. Launch PSoc Express.
Front of Board
Mini USB Port
6.22. In the Pin Specific Tuning pane, check
Show Differences
.
6.23. Slowly move your finger from left to right across the slider. The LEDs light clockwise start-
ing with the topmost LED on the board.
6.24. Press the mechanical button. All LEDs light at the same time.
What’s Next
Congratulations! You have successfully recreated the factory installed program used in Section
5. To experiment with slider and LED behavior, select any LED (G3 through G8) from the Select
Pin menu in the Pin Specific Tuning pane and set different slider segments to light different
LEDs. You can also reverse the inversion so that an LED is on until a button is pressed. To tune
the CapSense slider, follow the steps listed in Section 5.
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