AM4377 PRU-ICSS MDIO Query

Nithin kumar24

Other Parts Discussed in Thread: AM4377, SYSBIOS

Hi All,

I'm working on AM4377 PRU-ICSS module in custom board. I'm referring "spruhl7c_AM4377Refernce_Manual.pdf" document

to configure PRU-ICSS from ARM. There is no information regarding PRU-ICSS MDIO. But in AM435X there is MDIO related information in present.

To configure PHY from PRU-ICSS I have used below two signals,

pr1_mdio_data

pr1_mdio_mdclk

I'm not able to configure PHY using this signals.

I got base address of PRU-ICSS MDIO from SYS-BIOS RTOS "sysbios_ind_sdk_2.1.0.1" code.

I had changed below pins mux mode to "60008" to configure pr1 mdio and pr1 clock signals.

CTRL_CONF_XDMA_EVT_INTR0 Register (Offset = A70h) [reset = 40007h]---->d24
CTRL_CONF_XDMA_EVT_INTR1 Register (Offset = A74h) [reset = 40007h]--->c24

Please let me know what I have done is correct and is there any extra configuration I need to do for this.

Please reply ASAP since I'm in testing phase.

Regards,

Nithin

over 8 years ago

0 Biser Gatchev-XID over 8 years ago

TI__Guru**** 393215 points

Hi Nithin,

For pinmux values, the mode of PRU_MDIO pins is 0x8, not 0x4. As for information on the PRU Ethernet MII_RT module development, you can check this wiki: processors.wiki.ti.com/.../ICSS_EMAC_LLD_developers_guide

0 Nithin kumar24 over 8 years ago in reply to Biser Gatchev-XID

Intellectual 905 points

Hi Biser,

Thanks for the reply.

I had changed below pins mux mode to "0x60008" to configure pr1 mdio and pr1 clock signals.

mentioned in above mail, MUX mode I set to 0x8 only.

I will check wiki page and let you know.

Regards,
Nithin

0 Biser Gatchev-XID over 8 years ago in reply to Nithin kumar24

TI__Guru**** 393215 points

Sorry, I didn't understand correctly from your first post. 0x60008 is correct value.

0 Nithin kumar24 over 8 years ago in reply to Biser Gatchev-XID

Intellectual 905 points

Hi Biser,

Is there any other configuration is required for using pr1-mdio lines.

Regards,
Nithin

0 Biser Gatchev-XID over 8 years ago in reply to Nithin kumar24

TI__Guru**** 393215 points

I have asked the PRU experts to help on this.

0 Nithin kumar24 over 8 years ago in reply to Biser Gatchev-XID

Intellectual 905 points

Hi Biser,

I have one more doubt, Current in our custom board we connected both CPSW MDIO lines and PRU-ICSS MDIO lines for PHY.

If I use CPSW-MDIO lines to configure PHY, I'm able to configure PHY successfully. Now in current setting to use PRU-ICSS MDIO lines I have isolated CPSW MDIO lines from PHY.

MDIO lines we are using as interface only to configure PHY, correct me if I'm wrong.

If this is the case can I use CPSW MDIO lines to configure PHY and PHY data lines will configure to connect PRU-ICSS.

Is this works?

Regards,
Nithin

0 Biser Gatchev-XID over 8 years ago in reply to Nithin kumar24

TI__Guru**** 393215 points

Hi Nithin,

Dave Zaucha from the PRU team should have sent you a friend request, because they want to contact you offline. Please check.

0 Nithin kumar24 over 8 years ago in reply to Biser Gatchev-XID

Intellectual 905 points

Hi Biser,

Thanks for the info,
I sent my personal contact details to Dave.

Thanks and Regards,
Nithin

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AM4377 PRU-ICSS MDIO Query