Hardware requirements

  • Mini/micro USB cable

  • Loopback network cable RJ45 standard

  • MIMXRT1170-EVKB board

  • Personal Computer

Board settings

If Rx frame CRC error occurs, try to populate a suitable C66. The REV C/C1 boards populate 22pF which is high and may result in CRC errors on some of boards, if this is the case C66 may be removed or replaced by a smaller capacitor.

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. Insert loopback network cable to Ethernet RJ45 port(J4).

  4. Download the program to the target board.

  5. Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.

Make loopback 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 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.

Running the demo

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

ENET example start. Get the 1-th time 0 second, 1864 nanosecond Get the 2-th time 0 second, 7275192 nanosecond Get the 3-th time 0 second, 14804820 nanosecond Get the 4-th time 0 second, 22420658 nanosecond Get the 5-th time 0 second, 30036030 nanosecond Get the 6-th time 0 second, 37651402 nanosecond Get the 7-th time 0 second, 45267240 nanosecond Get the 8-th time 0 second, 52882612 nanosecond Get the 9-th time 0 second, 60498450 nanosecond Get the 10-th time 0 second, 68113822 nanosecond

Transmission start now! The 1 frame transmitted success! the timestamp is 0 second, 167770756 nanosecond One frame received. the length 1014 the timestamp is 0 second, 167973396 nanosecond The 2 frame transmitted success! the timestamp is 0 second, 200548167 nanosecond One frame received. the length 1014 the timestamp is 0 second, 200750756 nanosecond The 3 frame transmitted success! the timestamp is 0 second, 233324728 nanosecond One frame received. the length 1014 the timestamp is 0 second, 233527436 nanosecond The 4 frame transmitted success! the timestamp is 0 second, 266102139 nanosecond One frame received. the length 1014 the timestamp is 0 second, 266305136 nanosecond The 5 frame transmitted success! the timestamp is 0 second, 298878785 nanosecond

…… The 20 frame transmitted success! the timestamp is 0 second, 792377480 nanosecond One frame received. the length 1014 the timestamp is 0 second, 792580698 nanosecond