AM2432: EtherCAT Daisy chain

Jenita David

Prodigy 140 points

Part Number: AM2432
Other Parts Discussed in Thread: SYSCONFIG

Tool/software:

Hi all,

I'm currently working on EtherCAT with AM2432 + DP83822 custom board.

Board configuration:

Port 1 -> PHY address 3

Port 2 -> PHY address 1

I got my EtherCAT working on both the ports after the below configurations in code

#define ECAT_PHYADDR_IN                     (1u)
#define ECAT_PHYADDR_OUT                    (3u)
#define ECAT_PHYPOLINVERT_IN                (false)
#define ECAT_PHYPOLINVERT_OUT               (false)
#define ECAT_PHYUSERXLINK_IN                (true)
#define ECAT_PHYUSERXLINK_OUT               (false)

Even though PORT 1 has PHY address 3, in the code ECAT_PHYADDR_IN = 1

So as per my understanding Port 2 (addr 1) is configured as IN port and port 1 (addr 3) as OUT port

Daisy chain Connections tried:

As Phy Address 1 is mentioned as IN port in code tried this connection

Also tried vice versa

From both the above connection, I got only one BOX (BOARD 1).

Kindly correct me if I'm wrong and guide me further.

Regards,
D.Jenita.

9 months ago

0 PratheeshGangadhar 9 months ago

TI__Mastermind 49771 points

Jenita David said:
Board configuration:

Port 1 -> PHY address 3

Port 2 -> PHY address 1

You should use Port1 as IN port (set PHY address accordingly, 3 in this case) and Port2 as OUT port (1 in this case)

0 Jenita David 9 months ago in reply to PratheeshGangadhar

Prodigy 140 points

PratheeshGangadhar said:
You should use Port1 as IN port (set PHY address accordingly, 3 in this case) and Port2 as OUT port (1 in this case)

Initially I tried that configuration only, It was not working. Even one port is not up that's why I changed them.

0 Aaron Thomas 9 months ago in reply to Jenita David

TI__Genius 11135 points

Hi Jenita,

Is this thread a duplicate for AM2432: EtherCAT slave Daisy Chain not working ? If yes, I believe the logs captured in the other thread is also applicable here?

Jenita David said:
I got my EtherCAT working on both the ports after the below configurations in code

Can you set ECAT_PHYUSERXLINK_IN to false and see if the issue is still present?

Regards,
Aaron

0 Jenita David 9 months ago in reply to Aaron Thomas

Prodigy 140 points

Aaron Thomas said:
Is this thread a duplicate for AM2432: EtherCAT slave Daisy Chain not working ? If yes, I believe the logs captured in the other thread is also applicable here?

Yes it is

Aaron Thomas said:
Can you set ECAT_PHYUSERXLINK_IN to false and see if the issue is still present?

With that configuration I got port 1 alone working

0 Aaron Thomas 9 months ago in reply to Jenita David

TI__Genius 11135 points

Hi Jenita,

Jenita David said:
Yes it is

Thank you for the confirmation. Recommend to close one of the duplicate thread.

Jenita David said:
With that configuration I got port 1 alone working

When EnhancedLink is disabled, make sure Manual Mode Link Status Update is PHY Polling Based in EtherCAT SysConfig.

0 Jenita David 9 months ago in reply to Aaron Thomas

Prodigy 140 points

Hi Aaron,

Thank you for the input , will check and let you know

0 Jenita David 9 months ago in reply to Aaron Thomas

Prodigy 140 points

Hi Aaron,

Aaron Thomas said:
When EnhancedLink is disabled, make sure Manual Mode Link Status Update is PHY Polling Based in EtherCAT SysConfig.

#define ECAT_PHYADDR_IN (3u)
#define ECAT_PHYADDR_OUT (1u)
#define ECAT_PHYPOLINVERT_IN (true)
#define ECAT_PHYPOLINVERT_OUT (true)
#define ECAT_PHYUSERXLINK_IN (false)
#define ECAT_PHYUSERXLINK_OUT (false)
(Also tried ECAT_PHYPOLINVERT false)

By setting Enhanced Link disabled and PHY polling Based MDIO manual mode link status update, the code struck n the mid before PHy reset and intialization

Registers when PHY polling based MDIO manual mode link status update is set and PHY 1(addr 3) connected,

Registers when MlLink Based MDIO manual mode link status register

( No Device in TwinCAT)

Regards,

D. Jenita

0 Aaron Thomas 9 months ago in reply to Jenita David

TI__Genius 11135 points

Hi Jenita,

Jenita David said:
the code struck n the mid before PHy reset and intialization

You mean the PHY reset and initialization didn't happen cause the code got stuck somewhere earlier?

Jenita David said:
(Also tried ECAT_PHYPOLINVERT false)

This shouldn't matter in the case of EnhancedLink disabled.

Can you try disabling MDIO Manual Mode?

With this, we should be able to confirm that the HW connections are alright.

Jenita David said:
Board configuration:

Port 1 -> PHY address 3

Port 2 -> PHY address 1

So to confirm 1 point, How did you identify IN_PORT and OUT_PORT? Is it based on the status of the MDIO_LINK_REG? So if you see the bit getting set/reset when you connect the in/out port to an active network using Ethernet cable, then you should configure that particular bit address as the PHY Address of the corresponding port.

Additionally make sure the following signals are connected: