Microchip Technology DM240015 Data Sheet
MPLAB
®
STARTER KIT FOR
INTELLIGENT.INTEGRATED.ANALOG
USER’S GUIDE
2013 Microchip Technology Inc.
DS50002172A-page 19
Chapter 2. The Demonstration Application
This chapter describes the preprogrammed demonstration on the Starter Kit. The appli-
cation is essentially free-standing and does not require a host application running on a
computer. The board can be powered from either USB mini-B connector (J3 or J6).
cation is essentially free-standing and does not require a host application running on a
computer. The board can be powered from either USB mini-B connector (J3 or J6).
2.1
START-UP DISPLAY
The application displays a 24-hour clock (hh:mm, with flashing colon). The
Microchip logo icon appears in the lower right corner of the LCD; LED, D4, is
also lit. If this is not correct, try unplugging and replugging the USB cable. Refer to
Microchip logo icon appears in the lower right corner of the LCD; LED, D4, is
also lit. If this is not correct, try unplugging and replugging the USB cable. Refer to
for more information.
The three mTouch touch pads are used by the demo code for data entry and navigation:
• Left Arrow (): Decrement current display value or go to the previous demo
• Circle (): Enter data or select the next submenu
• Right Arrow (): Increase current display value or go to the next demo
The mTouch software included in the application waits a preset time to verify the pad
has been touched. When the software decodes a “finger down” event, the red LED, D1,
will light. When the finger is lifted off the pad, the LED is turned off and the demo appli-
cation executes the action. Tapping the pad for less than the programmed time (about
100 ms) will not cause a press to be detected.
• Left Arrow (): Decrement current display value or go to the previous demo
• Circle (): Enter data or select the next submenu
• Right Arrow (): Increase current display value or go to the next demo
The mTouch software included in the application waits a preset time to verify the pad
has been touched. When the software decodes a “finger down” event, the red LED, D1,
will light. When the finger is lifted off the pad, the LED is turned off and the demo appli-
cation executes the action. Tapping the pad for less than the programmed time (about
100 ms) will not cause a press to be detected.
2.2
SECTIONS OF THE DEMO
The demo application is divided into several foreground sections, with each dedicated
to showing a unique function of the microcontroller. In addition to these, the demo
application runs a continuous background process to export data over the USB port.
The sections are organized as a closed-loop menu, meaning they will repeat once the
end is reached if the key is pressed. The sections are ordered as follows:
• Clock
• Sigma-Delta A/D
• Pipelined A/D (also includes the ambient light sensor)
• Stereo DAC
• Temperature Sensor (external TC77 sensor)
• LCD Test
• Audio Input (microphone)
Some sections (like setting the clock) have submenus, which are selected using
the pad. Detailed information on each section follows.
to showing a unique function of the microcontroller. In addition to these, the demo
application runs a continuous background process to export data over the USB port.
The sections are organized as a closed-loop menu, meaning they will repeat once the
end is reached if the key is pressed. The sections are ordered as follows:
• Clock
• Sigma-Delta A/D
• Pipelined A/D (also includes the ambient light sensor)
• Stereo DAC
• Temperature Sensor (external TC77 sensor)
• LCD Test
• Audio Input (microphone)
Some sections (like setting the clock) have submenus, which are selected using
the pad. Detailed information on each section follows.