Hardware requirements

  • Mini/micro USB cable

  • Loopback network cable RJ45 standard (optional)

  • MIMXRT1170-EVKB board

  • Personal Computer

Board settings

On MIMXRT1170-EVKB REVC board, GPIO_AD_32 uses as ENET_MDC in this example which is muxed with the SD1_CD_B, please check the R1926 and R136 connected to SD1_CD_B. If they are populated with resistor and SD card is inserted, this time enet can’t access PHY.

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 demo runs, the log would be seen on the terminal like:

ENET example start.

The 1 frame transmitted success. The 2 frame transmitted success. The 3 frame transmitted success. The 4 frame transmitted success. …… The 20 frame transmitted success.

The transmitted frame is a 1000 length broadcast frame. When a 1000 length frame is received, the log would be added to the terminal like: A frame received. the length 1000 Dest Address xx:xx:xx:xx:xx:xx Src Address xx:xx:xx:xx:xx:xx

Optionally, you may use a loop back cable

Make a loopback network cable: 568B standard Unknowed standard J1 orange+white green+white J2 orange green J3 green+white orange+white J4 blue brown+white J5 blue+white brown J6 green orange J7 brown+white blue J8 brown blue+white

Connect J1 => J3, J2 => J6, J4 => J7, J5 => J8. 10/100M transfer only requires J1, J2, J3, J6, and 1G transfer requires all 8 pins. Check your net cable color order and refer to the 568B standard or the other standard. If your cable’s color order is not showed in the list, please connect J1~J8 based on your situation.

  1. Set CONFIG_APP_USES_LOOPBACK_CABLE=y in .config (or add/change #define APP_USES_LOOPBACK_CABLE 1 in mcux_config.h if you don’t use Kconfig) and rebuild the example.

  2. Insert loopback network cable to Ethernet RJ45 port.

  3. Run the demo in the same way as described earlier.