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

Overview

MPU Example defines protected/unprotected memory region from the core. A memory region is configured as the non-writable region. If any operation writes to this region, this example provides a prevention alert by outputting a message on terminal. Then, this region becomes accessible and writing to it is successful.

Supported Platforms

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

System Requirement

Hardware requirements

Toolchain requirements

Software requirements

Getting Started

Hardware settings

The MPU 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:

MPU example begin.
Set regionArray to non-writeable.
Write 0 to regionArray at No.0
regionArray[0] = 0
Core access violation and generate bus fault!
Core is granted write access permission!
Protected regionArray successfully !
Press any key to continue