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TMS320F28388D: Ethernet LEDS

PAk
Mastermind 7025 points

Part Number: TMS320F28388D

When we use Lwip, we only get the link led blinking on  the Ethernet connector. 

In the forum I have read that:

  • The Orange LED is for Link indication. It is On means Link is Up.
  • The Green LED is for speed indication and does not flash. It will be ON if the speed is set to 100mbps mode. 

So probably this is the case.

How could I set the speed to 100mbps on the Lwip example?

Thank yoy

  • 0
    TI__Expert 5411 points

    Hi,

    What have you connected the F28388D control card to over Ethernet? 

    Is the link partner in your case capable of 100mbps mode? and what does the BMCR(0x0) and BMSR(0x1) registers of PHY read. Does it show 100mbps mode link

    Regards,

    Sudharsanan

  • 0 in reply to Sudharsanan
    Mastermind 7025 points

    Sudharsanan said:

    What have you connected the F28388D control card to over Ethernet? 

    Is the link partner in your case capable of 100mbps mode? and what does the BMCR(0x0) and BMSR(0x1) registers of PHY read. Does it show 100mbps mode link

    A PC with Gigabit Ethernet and a Router with 100 Mbps support.

    Is the value of this registers enabled by HW? Or is there any previous SW setup?

    Regards

  • 0 in reply to Sudharsanan
    Mastermind 7025 points

    Sudharsanan said:
    Is the link partner in your case capable of 100mbps mode? and what does the BMCR(0x0) and BMSR(0x1) registers of PHY read. Does it show 100mbps mode link

    Where are the registers in the debug window? Couldn't find them, sorry.

    How could I check that I am working with 100mbps speed on the lwip application?

    Regards

  • 0 in reply to PAk
    TI__Expert 5411 points

    Those are not direct memory mapped registers of F2838x. You need do MDIO sequence to read it from the PHY. Did you get a chance to look at the example, I shared. 

    The best way to check is by reading from the PHY registers.

    Regards,

    Sudharsanan