CPU reset cause example

Purpose

This example demonstrates how to use the reset cause interface.

Requirements

This example can be used with SAM4L boards.

Description

The program turns LED0 on when the power-on reset happens and outputs different informaiton on the terminal, depending on the reset cause.

Type different commands to generate different reset. To generate Core BOD reset or I/O BOD reset, press reset button after typing 'c' or 'i'.

Usage

• Build the program and download it to the board.

1. On the computer, open and configure a terminal application (e.g., HyperTerminal on Microsoft Windows) with these settings:
   • 115200 bauds
   • 8 bits of data
   • No parity
   • 1 stop bit
   • No flow control
2. Start the application.
3. In the terminal window, the following text should appear:

   -- Reset_Cause Example xxx --
   -- xxxxxx-xx
   -- Compiled: xxx xx xxxx xx:xx:xx --

4. Choose the item in the following menu to test.

   Menu :
   ------Please select reset cause way--------
     c: Generate core BOD reset
     i: Generate I/O BOD reset
     w: Generate watchdog reset
     s: Generate system reset