AM2434: DP83286 custom drive on AM2434

Andrea Favero

Part Number: AM2434
Other Parts Discussed in Thread: DP83869, IND-COMMS-SDK

Hello Experts,

I'm trying to add custom drive support for the DP83826 PHY with AM2434. I'm using the firmware "ethernetip_adapter_discrete_io_device_mii_demo_am243x-lp_r5fss0-0_freertos_ti-arm-clang" from " ind_comms_sdk_am243x_09_00_00_03" for testing the new phy.

After comparing the PHY's registers values that I read from my board with the ones contained in Table 3-1 of this guide "DP83826 Troubleshooting Guide", I noticed that register 0x0006 is at 0xF instead of 0x7. This means that DP83826 has detected a fault has during the parallel detection process.

Which are the potential causes of this error and how can I fix them?

One other problem I have encountered is inconsistency between the value read using MDIO_phyLinkStatus and CUST_PHY_readReg(0x01); in particular CUST_PHY_readReg shows the correct link status, meanwhile MDIO_phyLinkStatus returns the opposite value.

Here's the log of the register read:

(PHY0 not connected, PHY1 not connected)

PHY0
MDIO_phyLinkStatus --> 0x0
CUST_PHY_readReg --> 0x7849

PHY1
MDIO_phyLinkStatus --> 0x0
CUST_PHY_readReg --> 0x7849

(PHY0 connected, PHY1 not connected)

PHY0
MDIO_phyLinkStatus --> 0x65535
CUST_PHY_readReg --> 0x786d

MDIO_PHY1
MDIO_phyLinkStatus --> 0x0
CUST_PHY_readReg --> 0x7849

(PHY0 not connected, PHY1 connected)

PHY0
MDIO_phyLinkStatus --> 0x0
CUST_PHY_readReg --> 0x7849

PHY1
MDIO_phyLinkStatus --> 0x65535
CUST_PHY_readReg --> 0x786d

(PHY0 connected, PHY1 connected)

MDIO_phyLinkStatus --> 0x65535
CUST_PHY_readReg --> 0x786d

PHY1
MDIO_phyLinkStatus --> 0x65535
CUST_PHY_readReg --> 0x786d

over 1 year ago

0 Karan Saxena over 1 year ago

TI__Guru* 77094 points

Hi Andrea

I'm reassigning this to our networking expert. This may need inputs from the PHY team.

Will respond with the details by end of the week.

Regards

Karan

0 Ashwani Goel over 1 year ago in reply to Karan Saxena

TI__Mastermind 25780 points

Hi Andrea,

We are working on this.

Hopefully you are referring below documentation for custom PHY integration
https://software-dl.ti.com/mcu-plus-sdk/esd/AM243X/09_01_00_41/exports/docs/api_guide_am243x/enetphy_guide_top.html

Regards

Ashwani

0 Andrea Favero over 1 year ago in reply to Ashwani Goel

Prodigy 140 points

Hi Ashwani,

thank you for your answer, I'll take a look at this guide and let you know if I find a solution.

Best Regards,

Andrea

0 Andrea Favero over 1 year ago in reply to Andrea Favero

Prodigy 140 points

Hello Ashwani,

after reading the guide you sent me I noticed that it suggests to add the init of the new phy in the folders <ENET_LLD>/include/phy and <ENET_LLD>/src/phy, although the example project I'm using utilizes the CUST_PHY_base.c and CUST_PHY_xxxxx to initialize the phy.

This is the documentation about the example project https://dev.ti.com/tirex/explore/content/ind_comms_sdk_am243x_09_01_00_03/docs/am243x/ethernetip_adapter/eip_quickstart_example.html.

I added my file CUST_PHY_dp83826, but the phy keeps giving me the same issues.

I'm wondering if this could be related to the extended registers (IEEE 802.3ah clause 22 to access clause 45). I saw them being mentioned in different parts of the program and in the datasheets, but I couldn't find anywhere a register map, maybe I'm not setting something there.

Regards,

Andrea

0 Ashwani Goel over 1 year ago in reply to Andrea Favero

TI__Mastermind 25780 points

Hi Andrea Favero,

We are working on "Custom PHY integration for EIP".

Will get back to you when I get timeline from dev team.

Regards

Ashwani

0 Andrea Favero 12 months ago in reply to Ashwani Goel

Prodigy 140 points

Hi Ashwani Goel,

is there an update on this topic?

Thanks,

Andrea

0 Ashwani Goel 12 months ago in reply to Andrea Favero

TI__Mastermind 25780 points

Ashwani Goel said:
"Custom PHY integration for EIP"

No update on this yet.

Regards

Ashwani

0 Andrea Favero 11 months ago in reply to Ashwani Goel

Prodigy 140 points

sorry if I insist, but my project is on standby waiting for the phy to work.

Do you have a prediction on when an update will be available? Will it be in a few weeks, couple of months...?

Alternatively, is there a way where I can modify the stack's source code that controls the phy?

Best Regards,

Andrea

0 Paula Carrillo 11 months ago in reply to Andrea Favero

TI__Mastermind 36550 points

Hi Andrea, let me check internally what is the estimated time and come back to you.

thank you,

Paula

0 Paula Carrillo 11 months ago in reply to Paula Carrillo

TI__Mastermind 36550 points

Hi Andrea, please check, if you haven't, our DP83869 example inside MCU-SDK (ind-comms-sdk/examples/industrial_comms/custom_phy) for a reference.

We also have an Custon PHY example for DP83826 that we can share. I will contact you in private message to coordinate better.

thank you,

Paula

0 Andrea Favero 11 months ago in reply to Paula Carrillo

Prodigy 140 points

Hi Paula,

I already checked the CUST_PHY_dp83869 files in the MCU-SDK and used it as a starting point to create the CUST_PHY_dp83826.c and CUST_PHY_dp83826.h files that I'm using. But I'm still encountering the issue mentioned at the beginning of this thread:

Andrea Favero said:
After comparing the PHY's registers values that I read from my board with the ones contained in Table 3-1 of this guide "DP83826 Troubleshooting Guide", I noticed that register 0x0006 is at 0xF instead of 0x7. This means that DP83826 has detected a fault has during the parallel detection process.

Andrea Favero said:
One other problem I have encountered is inconsistency between the value read using MDIO_phyLinkStatus and CUST_PHY_readReg(0x01); in particular CUST_PHY_readReg shows the correct link status, meanwhile MDIO_phyLinkStatus returns the opposite value.

I'll be waiting for your Custom PHY DP83826.

Thank you,

Andrea

0 Paula Carrillo 11 months ago in reply to Andrea Favero

TI__Mastermind 36550 points

Hi Andrea, I send you my email by private message

thank you,

Paula

0 Andrea Favero 11 months ago in reply to Paula Carrillo

Prodigy 140 points

Hi Paula,

I tested my board with your example, but I'm still encountering the same behaviour from the PHY in the ethernetip_adapter_discrete_io_device_mii_demo_am243x-lp_r5fss0-0_freertos_ti-arm-clang

Regards,

Andrea

0 Paula Carrillo 11 months ago in reply to Andrea Favero

TI__Mastermind 36550 points

Hi Andrea, I will re-assign to one of our experts for further support.

Just to clarify, you are facing same issue as mentioned in your first post?

thank you,

Paula

0 Andrea Favero 11 months ago in reply to Paula Carrillo

Prodigy 140 points

Hi,

yes the issues I'm facing are the same mentioned in the first post

0 Paula Carrillo 11 months ago in reply to Andrea Favero

TI__Mastermind 36550 points

Thanks for confirming

Paula

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AM2434: DP83286 custom drive on AM2434