Kinetis SDK v.1.2 Demo Applications User's Guide  Rev. 0
Freescale Semiconductor, Inc.
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PIT Example

Overview

The PIT Example project is a demonstration program that uses the KSDK software and PIT to cause the LED to blink with different frequencies on multiple channels. Measure the time of the generated pulse with the oscilloscope on the LED1 and the LED2. The LED2 toggles two times faster than the LED1.

Supported Platforms

These Freescale Freedom development platforms and Tower System modules are supported by the PIT example.

System Requirement

Hardware requirements

Toolchain requirements

Software requirements

Getting Started

Hardware settings

The PIT Example project does not call for any special hardware configurations. Although not required, the recommendation is to leave the development board's jumper settings and configurations in default state when running this example.

Prepare the example

  1. Connect a USB cable between the PC host and the OpenSDA USB port on the board.
  2. Open a serial terminal with these settings:
    • 115200 baud rate
    • 8 data bits
    • No parity
    • One stop bit
    • No flow control
  3. Download the program to the target board.
  4. Either press the reset button on your board or launch the debugger in your IDE to begin running the example.

Run the example

These instructions are displayed/shown on the terminal window:

Starting channel No.0 ...
Starting channel No.1 ...
Channel No.0 interrupt is occurred !
Channel No.0 interrupt is occurred !
Channel No.1 interrupt is occurred !
Channel No.0 interrupt is occurred !
Channel No.0 interrupt is occurred !
Channel No.1 interrupt is occurred !