Hardware requirements

• Mini/micro USB cable

• MIMXRT1040-EVK board

• Personal Computer

Board settings

No special settings are required.

Prepare the Demo

1. Connect a USB cable between the host PC and the OpenSDA USB port on the target board.

2. Open a serial terminal with the following 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 demo.

Running the demo

When the example runs successfully, the following message is displayed in the terminal:

----- Fast test starts -----
----- Low Byte test starts -----
Waiting for timeout reset
Low Byte test succeeded
----- High Byte test starts -----
Waiting for timeout reset
High Byte test succeeded
----- The end of RTWDOG fast test -----
----- Refresh test start -----
----- None-window mode -----
Refresh rtwdog 1 time
Refresh rtwdog 2 time
Refresh rtwdog 3 time
Refresh rtwdog 4 time
Refresh rtwdog 5 time
Refresh rtwdog 6 time
Waiting for time out reset
None-window mode reset succeeded
----- Window mode -----
Refresh rtwdog 1 time
Refresh rtwdog 2 time
Refresh rtwdog 3 time
Waiting for time out reset
Window mode reset succeeded

Note: To download binary into qspiflash and boot from qspiflash directly, following steps are needed:

1. Compile flash target of the project, and get the binaray file “rtwdog.bin”.

2. Set the SW7: 1 off 2 off 3 on 4 off, then power on the board and connect USB cable to J33.

3. Drop the binaray into disk “RT1040-EVK” on PC.

4. Wait for the disk disappear and appear again which will take couple of seconds.

5. Reset the board by pressing SW3 or power off and on the board.