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Dear TI Team,
I have bought two DP83TG720EVM-MC Media Converter Evaluation Module Boards and I'm trying to build a network bridge with them.
Here is a block diagram of my setup:
I want to transfer tcp/ip data from PC#1 over single pair ethernet to PC#2. Therefor I want to use the two eval-boards to make the conversion from RJ45 to SPE and back from SPE to RJ45 again.
With the default configuration of the boards I didn't get a link up with the two eval-boards directly connected over SPE. So i changed the jumper J2 from one board from master to slave and now I get a stable link over SPE. I also have a link from both PCs to the respective eval-board but I cant transfer any data from PC#1 to PC#2.
When I directly connect PC#1 and PC#2 over RJ45 I can transfer data without problems.
I have read out the debug information from both eval-boards:
Board1:
Board: DP83TG720-Q1 Media Converter Board Revision: 4 RGMII DIP Switch position: SW1:1 SW2:1 SW3:1 SW4:1 Mode: 15 Schematic Revision: 4 R Software Revision: 2.4 PHY Type 1: DP83867E PHY ID: 0 PHY Revision: 1 PHY Type 2: DP83TG720 PHY ID: 8 PHY Revision: 4 ========== Complete status report ======== +------ General status of 720 PHY -------+ | - 720 PHY is MASTER | | - 720 PHY receiver valid link | | - 720 PHY remote receiver valid link | +------ General status of 867 PHY -------+ | - 867 PHY is SLAVE | | - 867 PHY receiver OK | | - 867 PHY remote receiver OK | +-------- Link status of 720 PHY --------+ | - Link is UP | +-------- Link status of 867 PHY --------+ | - Link is UP | | - Link is FULL DUPLEX | +------ Interrupt status of 720 PHY -----+ | - UNDER_VOLT_INTERRUPT DISABLED | | - OVER_VOLT_INTERRUPT DISABLED | | - OVER_TEMP_INTERRUPT DISABLED | | - LINK_STATUS_CHNG_INT DISABLED | | - LINK_QUALITY_LOW_INTERRUPT | | - ENERGY_DETECT_INTERRUPT | | - ESD_EVENT_INTERRUPT | |----- Interrupt status of 867 PHY ------| | - PAGE_RECEIVED_INTERRUPT | | - AUTONEG_COMP_INTERRUPT | | - LINK_STATUS_CHNG_INTERRUPT | | - FALSE_CARRIER_INTERRUPT | | - MDI_CROSSOVER_CHNG_INTERRUPT | | - XGMII_ERROR_INTERRUPT | | - POLARITY_CHNG_INTERRUPT | +----------------------------------------+
Board2:
Board: DP83TG720-Q1 Media Converter Board Revision: 4 RGMII DIP Switch position: SW1:1 SW2:1 SW3:1 SW4:1 Mode: 15 Schematic Revision: 4 R Software Revision: 2.4 PHY Type 1: DP83867E PHY ID: 0 PHY Revision: 1 PHY Type 2: DP83TG720 PHY ID: 8 PHY Revision: 4
========== Complete status report ======== +------ General status of 720 PHY -------+ | - 720 PHY is SLAVE | | - 720 PHY receiver valid link | | - 720 PHY remote receiver valid link | +------ General status of 867 PHY -------+ | - 867 PHY is SLAVE | | - 867 PHY receiver OK | | - 867 PHY remote receiver OK | +-------- Link status of 720 PHY --------+ | - Link is UP | +-------- Link status of 867 PHY --------+ | - Link is UP | | - Link is FULL DUPLEX | +------ Interrupt status of 720 PHY -----+ | - UNDER_VOLT_INTERRUPT DISABLED | | - OVER_VOLT_INTERRUPT DISABLED | | - OVER_TEMP_INTERRUPT DISABLED | | - LINK_STATUS_CHNG_INT DISABLED | | - LINK_QUALITY_LOW_INTERRUPT | | - ENERGY_DETECT_INTERRUPT | | - ESD_EVENT_INTERRUPT | |----- Interrupt status of 867 PHY ------| | - PAGE_RECEIVED_INTERRUPT | | - AUTONEG_COMP_INTERRUPT | | - LINK_STATUS_CHNG_INTERRUPT | | - FALSE_CARRIER_INTERRUPT | | - MDI_CROSSOVER_CHNG_INTERRUPT | | - XGMII_ERROR_INTERRUPT | | - POLARITY_CHNG_INTERRUPT | +----------------------------------------+
I can't see any problems in the debug information.
Can you please help to determine the problem of my setup.
Thank you!
Best regards,
Peter
Hi Adrian,
I set the DP83TG720 as instructed to analog loopback mode by setting register 0x0016=0x0008 and 0x0405=0x2800.
PC#1 (QuantaCo_14:21:a1) now sends a broadcast message asking for ip 192.168.0.255 and as expected a broadcast message comes back from the eval board (c4:44:44:04:01:81) but with the ip 192.136.0.255.
Looks like the ip gets changed by the eval board.
Next I set the DP83867 to reverse loopback by setting register 0x0000 to 0x5140 and 0x0016 to 0x0020.
With this change I don't receive any broadcasts anymore.
After that I changed the ip of my PC#1 to 10.0.0.2 and tried to ping 10.0.0.3 with the following result:
I would except to get the same arp broadcast message back that I sent out.
Best regards,
Peter
Hi Adrian,
yes I can confirm after setting the DP83867 to loopback mode with PC#1 ip=192.168.2.255 I didn't receive broadcasts.
Then I changed the ip to of PC#1 to 10.0.0.2 and I received packets but not the broadcasts I transmitted.
As advised I set the DP83TG720 on eval board #2 to reverse loopback mode so that all data sent from PC#1 should be transmitted back over SPE to eval board #1 and then to PC#1 with the same result.
I get a broadcast message back but the data is not the same as transmitted by PC#1:
Its the same behaviour as when I set the DP83TG720 on eval board #1 into loopback.
Looks like the data gets corrupted.
Best regards,
Peter
