TMS570LC4357: MDIOPhyRegRead

Javier Guzman

Part Number: TMS570LC4357

Hello again people,

I am trying to setup an Ethernet communication and the code gets stuck in the following loop from MDIOPhyRegRead function:

    HWREG(baseAddr + MDIO_USERACCESS0)
                           = (((uint32)MDIO_USERACCESS0_READ) | MDIO_USERACCESS0_GO
                              |((regNum & PHY_REG_MASK) << PHY_REG_SHIFT)
                              |((phyAddr & PHY_ADDR_MASK) << PHY_ADDR_SHIFT));

    /* wait for command completion */
    /*SAFETYMCUSW 28 D MR:NA <APPROVED> "Hardware status bit read check" */
    while((HWREG(baseAddr + MDIO_USERACCESS0) & MDIO_USERACCESS0_GO) == MDIO_USERACCESS0_GO)
    { 
	} /* Wait */

Any idea what I am missing? The tracecall is as follows:

MDIOPhyRegRead
Dp83640LinkStatusGet
EMACHWInit

Thank you in advance and kind regards,

Javier Guzman

over 8 years ago

0 QJ Wang over 8 years ago

TI__Guru**** 198766 points

Hello Javier,

You may use a wrong register number (regNum) or wrong phyAddr when you call this PHY register read function.

0 Javier Guzman over 8 years ago in reply to QJ Wang

Prodigy 130 points

Hello again Wang,

regNum and phyAddr were initially to one, I have tried with 0 and combinations without success. Presumably, this code is auto generated by HaloGen so I thought it should be ok. Any other idea what could be wrong?

Thank you!

Kind regards,
Javier Guzman

0 Javier Guzman over 8 years ago in reply to Javier Guzman

Prodigy 130 points

Any more suggestions please? We have not resolved this yet.

Kind regards,
Javier Guzman

0 QJ Wang over 8 years ago in reply to Javier Guzman

TI__Guru**** 198766 points

Hello Javier,

Which board did you do test on?

If you use TI Launchpad, you need configure the pinmux:

1. Enable MII Driver

2. Pinmux Panel:

1. Check MII to enable MII mode

2. uncheck the MII and MDIO signals on pins: A14, B4, B11, D19, E18, F3, G3, G19, H18, H19, J18, J19, K19, N19, P1, R2, and V5

2. Input Pin Muxing Panel: check the MII and MDIO signals to the default (left column):

MDIO=F4, MII_COL=W4, MII_CRS=V4, MII_RX_DV=U6, MII_RX_ER=U5, MII_RXCLK=T4, MII_RXD[0]=U4, MII_RXD[1]=T3, MII_RXD[2]=U3,

MII_RXD[3]=V3, MII_TX_CLK=U7

If you use TI HDK, it uses the alternate states for MII signals

0 Javier Guzman over 8 years ago in reply to QJ Wang

Prodigy 130 points

Hello Wang,

Thanks for your response. I am using the TMS570LC4357, concretely this one:
www.ti.com/.../launchxl2-570lc43

I have regenerated the code following your steps but unfortunately it has not worked. I have tried with the default values as well as with the alternate states for MII signals.

Any more thoughts?

Thank you in advance and kind regards,
Javier Guzman

0 Joe Josn over 8 years ago in reply to Javier Guzman

Expert 1285 points

Javier, Most probably you are missing a call, MDIOInit(...), to initialize/enable MDIO module.

0 Javier Guzman over 8 years ago in reply to Joe Josn

Prodigy 130 points

I have just checked and I call EMACInstConfig, EMACInit, MDIOInit.

0 QJ Wang over 8 years ago in reply to Javier Guzman

TI__Guru**** 198766 points

Hello Javier,

Please test using the attached project on TMS570LC43x launchpad. I created the test case for RM57Lx device on RM57x Launchpad, and tested without problem, then converted the project for TMS570LC43x launchpad. It should work.

8726.TMS570LC4357_LaunchPad_EMAC_Loopback.zip

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TMS570LC4357: MDIOPhyRegRead