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TMS320F28388D: TMS320F28388 link with P17 of DP83822

Sammi Shang
Expert 4450 points
Part Number: TMS320F28388D
Other Parts Discussed in Thread: TMDXCNCD28388D, C2000WARE, DP83826E

Dear team,

I want to confirm how to connect ESC control of TMS320F28388 with DP83822. Is it right to connect GPIO 143/144 to LED Link 0/1, GPIO 148/9 connect to PHY 0 Link/PHY 1 Link?

Thanks.

Best regards,

Sammi

  • 0
    TI__Mastermind 41365 points

    Sammi,

    have you looked at the controlCARD's schematics? They show how to connect this and are found in C2000Ware\boards\controlCARDs\TMDXCNCD28388D\Rev.A

    GPIO143/144 connects to the cathode of the Green LED in the RJ45 connector. This is an output to turn on the LED.

    GPIO 148/149 connect to Pin 17 of the DP83822(RHB package) should be connected to the cathode of the yellow LED in the RJ45 connector.

    The control card uses DP83822 10/100M Ethernet PHY  for EtherCAT communication. The PHY has low round trip ( TX+RX) latency of  242 ns and robust EMI/EMC performance.  DP83826E/I as alternate 10/100M Ethernet PHY is also recommended for this design. DP83826E has further improved performance on Latency and deterministic latency of < 216 ns +/- 2ns and fixed XI to TX_CLK clock phase +/- 2ns and robust EMI/EMC performance making it suitable for real time application. For more details, please refer to DP83826 datasheet at following link

    https://www.ti.com/product/DP83826E

    Regards,
    Cody 

  • 0 in reply to Cody Watkins
    TI__Expert 4450 points

    Hi Cody,

    Thanks for your reply. As I know, EtherCAT has standard LED indicator: ERR/RUN/Link. I want to know in the reference design schematic, green LED corresponded to Link of EtherCAT or Yellow LED corresponded?

    Thanks.

    Best regards,

    Sammi

  • 0 in reply to Sammi Shang
    TI__Mastermind 41365 points

    Sammi,

    GPIO 144 indicates link active and GPIO 148 indicates link status. By the standard the link status light should be yellow.

    Regards,
    Cody 

  • 0 in reply to Cody Watkins
    TI__Expert 4450 points

    Hi Cody,

    Per discussed with customer, we still confused about this question.

    For general etherCAT light indicators, ERR/RUN/2 LINK. Each link of etherCAT will connect with 1 GPIO to show 2 different status. When the light is on, it means connect success. When the light twinkle, it means data is transmitting. So we are confused that seems we have 2 GPIOs connect with 1 port of EtherCAT to cover those two status for 28388?

    Thanks.

    Best regards,

    Sammi

  • 0 in reply to Sammi Shang
    TI__Mastermind 41365 points

    Sammi,

    We have implemented a total of 6 indicator lights for our EtherCAT Slave Controller with 2 ports. Please look at the controlCARD schematic which I pointed to above.

    In the controlCARD we use:

    1. GPIO 145 for the red Error LED
    2. GPIO 146 for the Green Run LED
    3. GPIO 143 for the green LED of port 0
    4. GPIO 148 for the yellow LED of port 0
    5. GPIO 144 for the green LED of port 1
    6. GPIO 149 for the yellow LED of port 1

    The propose of each GPIO is described in the Datasheet and the Technical Reference Manual.

    Regards,
    Cody