1.35 WDT Timeout

This example application shows how the WDT peripheral library resets the watchdog timer by not feeding the watchdog on switch press. The application sets up the watchdog to reset the device. The application also sets up the timer to blink an LED to emulate a process. A user switch press forces the device to wait in an infinite loop to emulate a deadlock. As a result a device reset is triggered as the watchdog counter overflows the bounded value.

To clone or download this application from Github, go to the main page of this repository and then click Clone button to clone this repository or download as zip file. This content can also be downloaded using content manager by following these instructions.

Path of the application within the repository is apps/wdt/wdt_timeout/firmware.

To build the application, refer to the following table and open the project using its IDE.

The following table shows the target hardware for the application projects.

• Connect the Debug USB port (J12) on the board to the computer using a micro USB cable
• Connect the USB to UART port (J25) on the board to the computer using a micro USB cable

• Connect the Debug USB port (J1) on the board to the computer using a micro USB cable

• Connect the Debug USB port (J500) on the board to the computer using a micro USB cable
• Connect the USB to UART port (J400) on the board to the computer using a micro USB cable

• Connect the Debug USB port (J1) on the board to the computer using a micro USB cable

1. Open the Terminal application (Ex.: Tera term) on the computer
2. Connect to the EDBG Virtual COM port and configure the serial settings as follows:
   • Baud : 115200
   • Data : 8 Bits
   • Parity : None
   • Stop : 1 Bit
   • Flow Control : None
3. Build and Program the application project using its IDE
4. LED should be blinking and the console displays the following message

   

5. Press the switch to put the system in a deadlock
6. LED should stop blinking and the console should print the following message

   

7. WDT will reset the device in four seconds and the demonstration should restart
   Refer the table below for details of Switch and LED names:

   Board	Switch Name	LED Name
   PIC32MK GP Development Kit	S1	LED1
   PIC32MK MCJ Curiosity Pro Board	SW200	LED2
   PIC32MK MCM Curiosity Pro Board	SW1	LED1
   PIC32MK MCA Curiosity Pro Board	SW200	LED1