DM8148 : Ethernet IEEE 1588/802.1AS PTP Support

Albert David

Friends,

I made the required changes in EZSDK 5.03.00.09 kernel and built the ptpd2 to use the cpts h/w time-stamping.
here is the link I followed,

http://processors.wiki.ti.com/index.php/DM814x_AM387x_IEEE_1588_Application_Notes
http://processors.wiki.ti.com/index.php/DM814x_AM387x_Ethernet_Switch_User_Guide
both the links seems to be talking about the same thing.

I am having two DM8148 EVMs, one invokes ptpd2 as a master and second one as a slave,
Note: Both the EVM's are connected directly through CAT5 network cable(without any ethernet switch in between)

#########MASTER EVM messages#######################################################
MASTER MAC ID is: 90:D7:EB:C4:3F:DD
root@dm814x-evm:/usr/share/ti/data/ptpv2d# ./ptpd2 -ceD
timestamp, state, clock ID, one way delay, offset from master, slave to master, master to slave, drift
2011-11-11 13:52:17:595876, init(ptpd notice) Using Linux PTP Hardware Clock API
2011-11-11 13:52:17:601260, lstn
2011-11-11 13:52:29:601082, mst (ID:90d7ebfffec43fdd)

#########SLAVE EVM messages#########################################################
root@dm814x-evm:/usr/share/ti/data/ptp# ./ptpd2 -cegD
timestamp, state, clock ID, one way delay, offset from master, slave to master, master to slave, drift
2011-11-11 02:33:00:347051, init(ptpd notice) Using Linux PTP Hardware Clock API
2011-11-11 02:33:00:352382, lstn
2011-11-11 02:33:17:666212, slv, 90d7ebfffec43fdd/01, 0.000000000, 0.000000000, 0.000000000, 0.000000000, 0(ptpd notice) adjusted system clock by -68s -719382256ns
2011-11-11 02:33:19:666387, slv, 90d7ebfffec43fdd/01, 0.000000000, -68.719382256, 0.000000000, -68.719382256, 0
2011-11-11 02:33:21:666281, slv, 90d7ebfffec43fdd/01, 0.000000000, -0.000001844, 0.000000000, 0.000003688, -1
2011-11-11 02:33:23:666283, slv, 90d7ebfffec43fdd/01, 0.000000000, -0.000004252, 0.000000000, 0.000004816, -5
2011-11-11 02:33:25:666274, slv, 90d7ebfffec43fdd/01, 0.000000000, -0.000005130, 0.000000000, 0.000005444, -10
2011-11-11 02:33:27:666278, slv, 90d7ebfffec43fdd/01, 0.000000000, -0.000005674, 0.000000000, 0.000005904, -15
2011-11-11 02:33:29:666270, slv, 90d7ebfffec43fdd/01, 0.000000000, -0.000006068, 0.000000000, 0.000006232, -21
2011-11-11 02:33:31:666276, slv, 90d7ebfffec43fdd/01, 0.000000000, -0.000006358, 0.000000000, 0.000006484, -27
2011-11-11 02:33:33:666261, slv, 90d7ebfffec43fdd/01, 0.000000000, -0.000006570, 0.000000000, 0.000006656, -33
2011-11-11 02:33:35:666275, slv, 90d7ebfffec43fdd/01, 0.000000000, -0.000006712, 0.000000000, 0.000006768, -39
2011-11-11 02:33:37:666267, slv, 90d7ebfffec43fdd/01, 0.000000000, -0.000006804, 0.000000000, 0.000006840, -45
2011-11-11 02:33:39:666272, slv, 90d7ebfffec43fdd/01, 0.000000000, -0.000006870, 0.000000000, 0.000006900, -51
2011-11-11 02:33:41:666273, slv, 90d7ebfffec43fdd/01, 0.000000000, -0.000006910, 0.000000000, 0.000006920, -57
2011-11-11 02:33:43:666267, slv, 90d7ebfffec43fdd/01, 0.000000000, -0.000006922, 0.000000000, 0.000006924, -63
2011-11-11 02:33:45:666266, slv, 90d7ebfffec43fdd/01, 0.000000000, -0.000006928, 0.000000000, 0.000006932, -69
2011-11-11 02:33:47:666258, slv, 90d7ebfffec43fdd/01, 0.000000000, -0.000006926, 0.000000000, 0.000006920, -75
2011-11-11 02:33:48:666130, slv, 90d7ebfffec43fdd/01, 0.000000000, 0.000002052, 0.000000000, 0.000011024, -73

with this print, it looks like slave is able to synchronize its clock after drifting several hundred nano seconds(you can see the drift is changing on slave from 0 to -73 nano sec? ),

In next step, I used Lab-X Titanium 411 Ethernet switch and connected both the EVM's on this switch,
this time, Ethernet switch was acting as a grand master clock, hence I invoked ptpd2 command as a slave on both the EVMs.
but the problem is, both the slaves are complaining of an unknown Ethernet Packet(will add the exact print message in my next post).

It looks like my Ethernet switch and EVM's are unable to understand each other's message(raw ethernet packet),
can some one tell me the difference b/w ptpd2 and ptpv2d
Any idea about using ptpv2d from http://code.google.com/p/ptpv2d/ for our DM8148 EVM??
ptpv2d from code.google.com seems to support 1588 h/w time-stamping only for MPC831x processor.
has anyone tried using DM8148 h/w time-stamp through ptpv2d?

It would be interesting to know if anyone already working on this stuff, please share your views,
thanks and best wishes,

Albert.

over 13 years ago

0 Mugunthan V N over 13 years ago

TI__Intellectual 2750 points

Albert

Can you also capture the pcap of "ptpv2d from http://code.google.com/p/ptpv2d/" along with the 8148 evm logs

with regards

Mugunthan V N

0 Albert David over 13 years ago in reply to Mugunthan V N

Intellectual 440 points

Hello Mugunthan,

I can send you the needed info later when i have the h/w access again,

in the mean time here is the log messages printed by one of the ptpd2 running as a slave(./ptpd2 -cegDP) on PG2.1 DM8148 EVM.

(ptpd notice) msgDebugHeader: messageType 2
(ptpd notice) msgDebugHeader: versionPTP 2
(ptpd notice) msgDebugHeader: messageLength 54
(ptpd notice) msgDebugHeader: domainNumber 0
(ptpd notice) msgDebugHeader: flags 02 08
(ptpd notice) msgDebugHeader: correctionfield 0
(ptpd notice) msgDebugHeader: sourcePortIdentity.clockIdentity 00:50:c2:ff:fe:4edc:03
(ptpd notice) msgDebugHeader: sourcePortIdentity.portNumber 3
(ptpd notice) msgDebugHeader: sequenceId 168
(ptpd notice) msgDebugHeader: controlField 5
(ptpd notice) msgDebugHeader: logMessageIntervale 0
(ptpd notice) msgDump:unrecognized message

BTW: FYI, Titanium 411 from Lab-x is an AVB ethernet switch I hope the PTP support built into this switch is according to the IEEE 802.1AS precesion timing protocol,

Br,

Albert.

0 Mugunthan V N over 13 years ago in reply to Albert David

TI__Intellectual 2750 points

Albert

"msgDump:unrecognized message"

From the above log it seems like ptp message type received by ptpd2 is invalid. We can validate only with pcap capture.

Also can you perform the test with one evm connected to the server.

with regards

Mugunthan V N

0 Albert David over 13 years ago in reply to Mugunthan V N

Intellectual 440 points

Hello Mugunthan,

here is the tcpdum from my EVM, please let me know if this helps

this time i have connected one EVM to AVB switch, and on this EVM i was running ptpd2 -eg, and then tcpdum -vv

root@dm814x-evm:/usr/share/ti/data/ptpv2d# tcpdump -vv
device eth0 entered promiscuous mode
net eth0: promiscuity ignored!
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
11:25:24.264722 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:0e (oui Unknown), ethertype Unknown (0x22ea), length 124:
    0x0000: 0001 1900 1d20 0000 0000 0000 0000 0000 ................
    0x0010: 0000 0000 0000 0000 0000 0000 0000 0000 ................
    0x0020: 0000 0222 0026 2000 0000 0000 0000 0000 ...".&..........
    0x0030: 0000 0000 0000 0000 0000 0000 0000 0000 ................
    0x0040: 0000 0000 0000 0000 0000 0000 0308 000c ................
    0x0050: 2000 0000 0000 0000 0000 0000 0404 0008 ................
    0x0060: 2000 0000 0000 0000 0000 a91c 8455       .............U
11:25:24.373630 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:0e (oui Unknown), ethertype Unknown (0x88f7), length 72:
    0x0000: 1202 0036 0000 0208 0000 0000 0000 0000 ...6............
    0x0010: 0000 0000 0050 c2ff fe4e dc03 0003 14d1 .....P...N......
    0x0020: 0500 0000 0000 0000 0000 0000 0000 0000 ................
    0x0030: 0000 0000 0000 58e0 e7d2                 ......X...
11:25:25.376508 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:0e (oui Unknown), ethertype Unknown (0x88f7), length 72:
    0x0000: 1202 0036 0000 0208 0000 0000 0000 0000 ...6............
    0x0010: 0000 0000 0050 c2ff fe4e dc03 0003 14d2 .....P...N......
    0x0020: 0500 0000 0000 0000 0000 0000 0000 0000 ................
    0x0030: 0000 0000 0000 65d9 02a4                 ......e...
11:25:26.379422 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:0e (oui Unknown), ethertype Unknown (0x88f7), length 72:
    0x0000: 1202 0036 0000 0208 0000 0000 0000 0000 ...6............
    0x0010: 0000 0000 0050 c2ff fe4e dc03 0003 14d3 .....P...N......
    0x0020: 0500 0000 0000 0000 0000 0000 0000 0000 ................
    0x0030: 0000 0000 0000 b133 713f                 .......3q?
11:25:27.382289 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:0e (oui Unknown), ethertype Unknown (0x88f7), length 72:
    0x0000: 1202 0036 0000 0208 0000 0000 0000 0000 ...6............
    0x0010: 0000 0000 0050 c2ff fe4e dc03 0003 14d4 .....P...N......
    0x0020: 0500 0000 0000 0000 0000 0000 0000 0000 ................
    0x0030: 0000 0000 0000 1fab c849                 .........I
11:25:28.385179 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:0e (oui Unknown), ethertype Unknown (0x88f7), length 72:
    0x0000: 1202 0036 0000 0208 0000 0000 0000 0000 ...6............
    0x0010: 0000 0000 0050 c2ff fe4e dc03 0003 14d5 .....P...N......
    0x0020: 0500 0000 0000 0000 0000 0000 0000 0000 ................
    0x0030: 0000 0000 0000 cb41 bbd2                 .......A..
11:25:29.388077 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:0e (oui Unknown), ethertype Unknown (0x88f7), length 72:
    0x0000: 1202 0036 0000 0208 0000 0000 0000 0000 ...6............
    0x0010: 0000 0000 0050 c2ff fe4e dc03 0003 14d6 .....P...N......
    0x0020: 0500 0000 0000 0000 0000 0000 0000 0000 ................
    0x0030: 0000 0000 0000 f678 5ea4                 .......x^.
11:25:30.390969 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:0e (oui Unknown), ethertype Unknown (0x88f7), length 72:
    0x0000: 1202 0036 0000 0208 0000 0000 0000 0000 ...6............
    0x0010: 0000 0000 0050 c2ff fe4e dc03 0003 14d7 .....P...N......
    0x0020: 0500 0000 0000 0000 0000 0000 0000 0000 ................
    0x0030: 0000 0000 0000 2292 2d3f                 ......".-?
11:25:31.393854 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:0e (oui Unknown), ethertype Unknown (0x88f7), length 72:
    0x0000: 1202 0036 0000 0208 0000 0000 0000 0000 ...6............
    0x0010: 0000 0000 0050 c2ff fe4e dc03 0003 14d8 .....P...N......
    0x0020: 0500 0000 0000 0000 0000 0000 0000 0000 ................
    0x0030: 0000 0000 0000 aa49 2d49                 .......I-I
11:25:31.525144 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:21 (oui Unknown), ethertype Unknown (0x88f5), length 68:
    0x0000: 0001 0220 0000 0000 0000 0000 0000 0000 ................
    0x0010: 0000 0000 0000 0000 0000 0000 0000 0000 ................
    0x0020: 0000 0000 0000 0000 0000 0000 0000 0000 ................
    0x0030: 0000 c6bf f114                           ......
11:25:32.396746 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:0e (oui Unknown), ethertype Unknown (0x88f7), length 72:
    0x0000: 1202 0036 0000 0208 0000 0000 0000 0000 ...6............
    0x0010: 0000 0000 0050 c2ff fe4e dc03 0003 14d9 .....P...N......
    0x0020: 0500 0000 0000 0000 0000 0000 0000 0000 ................
    0x0030: 0000 0000 0000 7ea3 5ed2                 ......~.^.
11:25:33.399634 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:0e (oui Unknown), ethertype Unknown (0x88f7), length 72:
    0x0000: 1202 0036 0000 0208 0000 0000 0000 0000 ...6............
    0x0010: 0000 0000 0050 c2ff fe4e dc03 0003 14da .....P...N......
    0x0020: 0500 0000 0000 0000 0000 0000 0000 0000 ................
    0x0030: 0000 0000 0000 439a bba4                 ......C...
11:25:33.933665 IP (tos 0x0, ttl 64, id 0, offset 0, flags [none], proto UDP (17), length 576)
    0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 00:50:c2:4e:dc:03 (oui Unknown), length 548, xid 0x3e7fd558, Flags [none] (0x0000)
    Client-Ethernet-Address 00:50:c2:4e:dc:03 (oui Unknown)
    Vendor-rfc1048 Extensions
        Magic Cookie 0x63825363
        DHCP-Message Option 53, length 1: Discover
        Client-ID Option 61, length 7: ether 00:50:c2:4e:dc:03
        Vendor-Class Option 60, length 12: "udhcp 1.16.2"
        MSZ Option 57, length 2: 576
        Parameter-Request Option 55, length 7:
          Subnet-Mask, Default-Gateway, Domain-Name-Server, Hostname
          Domain-Name, BR, NTP
11:25:34.402584 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:0e (oui Unknown), ethertype Unknown (0x88f7), length 72:
    0x0000: 1202 0036 0000 0208 0000 0000 0000 0000 ...6............
    0x0010: 0000 0000 0050 c2ff fe4e dc03 0003 14db .....P...N......
    0x0020: 0500 0000 0000 0000 0000 0000 0000 0000 ................
    0x0030: 0000 0000 0000 9770 c83f                 .......p.?
11:25:35.274713 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:0e (oui Unknown), ethertype Unknown (0x22ea), length 124:
    0x0000: 0001 1900 1d20 0000 0000 0000 0000 0000 ................
    0x0010: 0000 0000 0000 0000 0000 0000 0000 0000 ................
    0x0020: 0000 0222 0026 2000 0000 0000 0000 0000 ...".&..........
    0x0030: 0000 0000 0000 0000 0000 0000 0000 0000 ................
    0x0040: 0000 0000 0000 0000 0000 0000 0308 000c ................
    0x0050: 2000 0000 0000 0000 0000 0000 0404 0008 ................
    0x0060: 2000 0000 0000 0000 0000 a91c 8455       .............U
11:25:35.406463 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:0e (oui Unknown), ethertype Unknown (0x88f7), length 72:
    0x0000: 1202 0036 0000 0208 0000 0000 0000 0000 ...6............
    0x0010: 0000 0000 0050 c2ff fe4e dc03 0003 14dc .....P...N......
    0x0020: 0500 0000 0000 0000 0000 0000 0000 0000 ................
    0x0030: 0000 0000 0000 39e8 7149                 ......9.qI
11:25:36.409351 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:0e (oui Unknown), ethertype Unknown (0x88f7), length 72:
    0x0000: 1202 0036 0000 0208 0000 0000 0000 0000 ...6............
    0x0010: 0000 0000 0050 c2ff fe4e dc03 0003 14dd .....P...N......
    0x0020: 0500 0000 0000 0000 0000 0000 0000 0000 ................
    0x0030: 0000 0000 0000 ed02 02d2                 ..........
11:25:36.939347 IP (tos 0x0, ttl 64, id 0, offset 0, flags [none], proto UDP (17), length 576)
    0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 00:50:c2:4e:dc:03 (oui Unknown), length 548, xid 0x3e7fd558, Flags [none] (0x0000)
    Client-Ethernet-Address 00:50:c2:4e:dc:03 (oui Unknown)
    Vendor-rfc1048 Extensions
        Magic Cookie 0x63825363
        DHCP-Message Option 53, length 1: Discover
        Client-ID Option 61, length 7: ether 00:50:c2:4e:dc:03
        Vendor-Class Option 60, length 12: "udhcp 1.16.2"
        MSZ Option 57, length 2: 576
        Parameter-Request Option 55, length 7:
          Subnet-Mask, Default-Gateway, Domain-Name-Server, Hostname
          Domain-Name, BR, NTP
11:25:37.412245 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:0e (oui Unknown), ethertype Unknown (0x88f7), length 72:
    0x0000: 1202 0036 0000 0208 0000 0000 0000 0000 ...6............
    0x0010: 0000 0000 0050 c2ff fe4e dc03 0003 14de .....P...N......
    0x0020: 0500 0000 0000 0000 0000 0000 0000 0000 ................
    0x0030: 0000 0000 0000 d03b e7a4                 .......;..
11:25:38.415137 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:0e (oui Unknown), ethertype Unknown (0x88f7), length 72:
    0x0000: 1202 0036 0000 0208 0000 0000 0000 0000 ...6............
    0x0010: 0000 0000 0050 c2ff fe4e dc03 0003 14df .....P...N......
    0x0020: 0500 0000 0000 0000 0000 0000 0000 0000 ................
    0x0030: 0000 0000 0000 04d1 943f                 .........?
11:25:39.418030 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:0e (oui Unknown), ethertype Unknown (0x88f7), length 72:
    0x0000: 1202 0036 0000 0208 0000 0000 0000 0000 ...6............
    0x0010: 0000 0000 0050 c2ff fe4e dc03 0003 14e0 .....P...N......
    0x0020: 0500 0000 0000 0000 0000 0000 0000 0000 ................
    0x0030: 0000 0000 0000 5880 034a                 ......X..J
11:25:39.945087 IP (tos 0x0, ttl 64, id 0, offset 0, flags [none], proto UDP (17), length 576)
    0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 00:50:c2:4e:dc:03 (oui Unknown), length 548, xid 0x3e7fd558, Flags [none] (0x0000)
    Client-Ethernet-Address 00:50:c2:4e:dc:03 (oui Unknown)
    Vendor-rfc1048 Extensions
        Magic Cookie 0x63825363
        DHCP-Message Option 53, length 1: Discover
        Client-ID Option 61, length 7: ether 00:50:c2:4e:dc:03
        Vendor-Class Option 60, length 12: "udhcp 1.16.2"
        MSZ Option 57, length 2: 576
        Parameter-Request Option 55, length 7:
          Subnet-Mask, Default-Gateway, Domain-Name-Server, Hostname
          Domain-Name, BR, NTP
11:25:40.420918 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:0e (oui Unknown), ethertype Unknown (0x88f7), length 72:
    0x0000: 1202 0036 0000 0208 0000 0000 0000 0000 ...6............
    0x0010: 0000 0000 0050 c2ff fe4e dc03 0003 14e1 .....P...N......
    0x0020: 0500 0000 0000 0000 0000 0000 0000 0000 ................
    0x0030: 0000 0000 0000 8c6a 70d1                 .......jp.
11:25:41.423862 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:0e (oui Unknown), ethertype Unknown (0x88f7), length 72:
    0x0000: 1202 0036 0000 0208 0000 0000 0000 0000 ...6............
    0x0010: 0000 0000 0050 c2ff fe4e dc03 0003 14e2 .....P...N......
    0x0020: 0500 0000 0000 0000 0000 0000 0000 0000 ................
    0x0030: 0000 0000 0000 b153 95a7                 .......S..
11:25:42.427701 00:50:c2:4e:dc:03 (oui Unknown) > 01:80:c2:00:00:0e (oui Unknown), ethertype Unknown (0x88f7), length 72:
    0x0000: 1202 0036 0000 0208 0000 0000 0000 0000 ...6............
    0x0010: 0000 0000 0050 c2ff fe4e dc03 0003 14e3 .....P...N......
    0x0020: 0500 0000 0000 0000 0000 0000 0000 0000 ................
    0x0030: 0000 0000 0000 65b9 e63c                 ......e..<

0 Mugunthan V N over 13 years ago in reply to Albert David

TI__Intellectual 2750 points

Albert

Can you capture the packets to a file using "-w <filename>", so that it will be easy to validate the packet information

with regards

Mugunthan V N

0 Mugunthan V N over 13 years ago in reply to Mugunthan V N

TI__Intellectual 2750 points

Albert

Can you confirm to which device the mac address belongs to?

Mac Address: 00:50:c2:4e:dc:03

I am seeing only PDELAY_REQ is being transmitted and no SYNC packets in the dump.

with regards

Mugunthan V N

0 Albert David over 13 years ago in reply to Mugunthan V N

Intellectual 440 points

Hello Mugunthan,

In my setup, I have my DM8148 EVM connected to AVB switch(no other device is connected to this switch),

MAC ID of DM8148EVM is: 90:D7:EB:C4:3F:DD

clock ID of the AVB switch shows : 00:50:C2:FF:FE:4E:DC:03 (i assume clock ID is derived from the MAC ID, hence MAC ID of switch must be 00:50:C2:4E:DC:03)

I have attached the file from 'tcpdump -w file'(please see the attachment).

also, here is the hexdump of this file

Br,

Albert.

7043.ptp.slave.log

root@dm814x-evm:/usr/share/ti/data/ptpv2d# hexdump ptp.slave.log
0000000 c3d4 a1b2 0002 0004 0000 0000 0000 0000
0000010 ffff 0000 0001 0000 3f31 4ebd a0a8 0000
0000020 0048 0000 0048 0000 8001 00c2 0e00 5000
0000030 4ec2 03dc f788 0212 3600 0000 0802 0000
0000040 0000 0000 0000 0000 0000 5000 ffc2 4efe
0000050 03dc 0300 b34d 0005 0000 0000 0000 0000
0000060 0000 0000 0000 0000 0000 0000 fa08 32c1
0000070 3f32 4ebd abd8 0000 0048 0000 0048 0000
0000080 8001 00c2 0e00 5000 4ec2 03dc f788 0212
0000090 3600 0000 0802 0000 0000 0000 0000 0000
00000a0 0000 5000 ffc2 4efe 03dc 0300 b44d 0005
00000b0 0000 0000 0000 0000 0000 0000 0000 0000
00000c0 0000 0000 62a6 4478 3f32 4ebd e28d 000a
00000d0 024e 0000 024e 0000 ffff ffff ffff d790
00000e0 c4eb dd3f 0008 0045 4002 0000 0000 1140
00000f0 ae78 0000 0000 ffff ffff 4400 4300 2c02
0000100 48b8 0101 0006 68a0 4960 0000 0000 0000
0000110 0000 0000 0000 0000 0000 0000 0000 d790
0000120 c4eb dd3f 0000 0000 0000 0000 0000 0000
0000130 0000 0000 0000 0000 0000 0000 0000 0000
*
00001e0 0000 0000 0000 0000 0000 0000 0000 8263
00001f0 6353 0135 3d01 0107 d790 c4eb dd3f 0c3c
0000200 6475 6368 2070 2e31 3331 322e 0239 4002
0000210 0737 0301 0c06 1c0f ff2a 0000 0000 0000
0000220 0000 0000 0000 0000 0000 0000 0000 0000
*
0000320 0000 0000 0000 3f33 4ebd ab66 0000 0048
0000330 0000 0048 0000 8001 00c2 0e00 5000 4ec2
0000340 03dc f788 0212 3600 0000 0802 0000 0000
0000350 0000 0000 0000 0000 5000 ffc2 4efe 03dc
0000360 0300 b54d 0005 0000 0000 0000 0000 0000
0000370 0000 0000 0000 0000 0000 8872 df0b 3f33
0000380 4ebd 7afa 0008 0252 0000 0252 0000 ffff
0000390 ffff ffff 5000 4ec2 03dc 0008 0045 4002
00003a0 0000 0000 1140 ae78 0000 0000 ffff ffff
00003b0 4400 4300 2c02 3446 0101 0006 43f7 2db7
00003c0 0000 0000 0000 0000 0000 0000 0000 0000
00003d0 0000 0000 5000 4ec2 03dc 0000 0000 0000
00003e0 0000 0000 0000 0000 0000 0000 0000 0000
*
00004a0 0000 0000 8263 6353 0135 3d01 0107 5000
00004b0 4ec2 03dc 0c3c 6475 6368 2070 2e31 3631
00004c0 322e 0239 4002 0737 0301 0c06 1c0f ff2a
00004d0 0000 0000 0000 0000 0000 0000 0000 0000
*
00005d0 0000 0000 0000 0000 0000 0000 2ee5 56cc
00005e0 3f34 4ebd b6d4 0000 0048 0000 0048 0000
00005f0 8001 00c2 0e00 5000 4ec2 03dc f788 0212
0000600 3600 0000 0802 0000 0000 0000 0000 0000
0000610 0000 5000 ffc2 4efe 03dc 0300 b64d 0005
0000620 0000 0000 0000 0000 0000 0000 0000 0000
0000630 0000 0000 b14f a9ee 3f35 4ebd be33 0000
0000640 0048 0000 0048 0000 8001 00c2 0e00 5000
0000650 4ec2 03dc f788 0212 3600 0000 0802 0000
0000660 0000 0000 0000 0000 0000 5000 ffc2 4efe
0000670 03dc 0300 b74d 0005 0000 0000 0000 0000
0000680 0000 0000 0000 0000 0000 0000 5b9b 329d
0000690 3f36 4ebd c1c1 0000 0048 0000 0048 0000
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*
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00020bc

0 Albert David over 13 years ago in reply to Albert David

Intellectual 440 points

Also FYI,

Titanium 411 AVB switch has a web server for different configuration,

I was connecting my PC with this switch and able to browse its pages at : http://192.168.1.1

Attached is the sreenshot of one of the pages related to PTP,

Br,

Albert.

0 Mugunthan V N over 13 years ago in reply to Albert David

TI__Intellectual 2750 points

Albert

I am not seeing any SYNC packet from the server.

Can you verify the server setting?

with regards

Mugunthan V N

0 Albert David over 13 years ago in reply to Mugunthan V N

Intellectual 440 points

Hello Mugunthan,

I just had a detailed look at the ethernet packets using wire shark,

AVB switch is always sending Path_delay_req_message to the LLDP_multicast destination.

Also in this packet, there is a flag called 802.1_AS_conform having the value as True

when i connected my wireshark(laptop) to the DM8148 EVM with "ptpd2 -ceD", I could see several Packets from DM8148 as follows,

Sync_message, Followup_message, Announce_message and Path_delay_req_message

but in these packets from DM8148(ptpd2), flag 802.1_AS_conform is having the value False

It looks like, ptpd2 of my DM8148 is is sensing this flag from AVB switch, as unrecognized message,

But i am not sure, just my guess.

My other question is, why my AVB switch is only sending out Path_delay_req_message, why not Sync_message, Followup_message,Announce_message,

Looks like I need to have some detailed look at the 802.1AS protocol_hand_shaking.

BTW: how big is the effort to include DM8148's h/w time stamping feature in ptpv2d?

ptpv2d already supports MPC831x h/w time stamping, this will be a good reference to add similar support for DM8148.

Br,

Albert.

0 Mugunthan V N over 13 years ago in reply to Albert David

TI__Intellectual 2750 points

ALbert

ptpd2 doesn't utilize the transport header 802.1_AS_conform from the received PTP packet.

Server has to tranfer PTP SYNC packet even with no clients connected to it. So can you verify the ptp setting of the switch why SYNC packets are not transmitted?

with regards

Mugunthan V N

0 Stephen Turner over 13 years ago in reply to Mugunthan V N

Genius 3476 points

Hi Albert and Mugunthan Any progress on this?. We are also developing AVB products around the TI814x and will be testing with the LabX switch. It was my impression that the current code in the CPSW Ethernet driver did support 802.1as with h/w time stamping?. Regards Steve

0 Albert David over 13 years ago in reply to Stephen Turner

Intellectual 440 points

Hello Steve,

I wrote to Lab-x about my problem, i am still awaiting there response.

I have done the changes in my PG2.1 kernel for h/w timestamping and tested the synchronization using ptpd2 on master and slave boards with direct network connection.

when i plotted the drift count(printed on console by slave ptpd2) on excel sheet, shape of this plot was like saw_tooth wave, drift count value was slowly moving from 0 to 250 and suddenly it was falling to 0(slave was adjusting its clock with master).

To me it seemed working fine as long as master and slave boards are connected one-to-one, but the problem is with switch in between.

wireshark shows that my Lab-x AVB switch is sending out only the Path_delay_req_message, there are no packets like sync_message and announce_message,

btw: I am waiting for my new 24 port AVB switch from Harman GS724T, as soon as i have it, i will compare the behaviour of Lab-x and Harman AVB switches.

You cant rule out the buggy initial fmw of these AVB switches(even they are quite new and may expect few firmware updates).

Apart from this, I am inclined towards ptpv2d instead of ptpd2, as this ptpv2d project is actively maintained and may expect 802.1AS support soon.

I will keep you updated once i have anything to share,

Br,

Albert.

0 Stephen Turner over 13 years ago in reply to Albert David

Genius 3476 points

Hi Albert

My initial thought would be that the problems are on the TI side, not the Lab-X switch. Lab-X is very involved with AVnu, the group promoting AVB and has most likely been through a lot of interoperability with other vendors AVB products.

That being said, it will be interesting to see how the Harman switch does, and whether LabX has ny firmware updates for their switch.

regards

-steve

0 Stephen Turner over 13 years ago in reply to Mugunthan V N

Genius 3476 points

Mugunthan

Do you guys have an AVB switch to test with?. If not, I can loan you one.

regards

Steve

0 Albert David over 13 years ago in reply to Stephen Turner

Intellectual 440 points

Steve,

I just got the reply from Lab-X,

Problem seems to be with ptpd2 and ptpv2d,

As per 802-1.1AS-2011 section 11.2.2: PDelay_Req_Message is used to determine if link is AS-capable.

This means, my switch is following AS standard by sending PDelay_req_message, and ptpd2/ptpv2d are not able to understand AS-Capable transactions.

we need to find a way out by making necessary changes in ptpd2/ptpv2d to handle the AS-Capable transactions.

Mugunthan: Do you have any plans for ptpd2 AS support?

I am already following-up with ptpv2d googlegroup, but so far did'nt hear anything from this group(may be because of holiday season, things moving slow).

BTW: I received new Firmware for my Lab-X titanium 411(ver 1.06),

As Lab-X says, this includes few other bug fixes(nothing related to PTP).

Looks like we both are on the same boat, exposed to all the risk with this new standard.

Br,

Albert.

0 Stephen Turner over 13 years ago in reply to Albert David

Genius 3476 points

Albert

How easy is it to use ptpv2d vs. ptpd?. Seems like TI has chosen ptpd at this stage. ptpv2d "should" already support 802.1AS, but maybe the support was based on an early draft. It was only ratified earlier this year.

I'm quite happy to lend TI a LabX AVB switch to fix this - but may have to send to India?.

Alan Bartky, the creator of ptpv2d lives in my area (Orange County, CA) and I'd be happy to lend him a switch as well if that would help. Maybe I should contact him...

-steve

0 Albert David over 13 years ago in reply to Stephen Turner

Intellectual 440 points

Alan,

yes, as you said, I can see, ptpv2d already has the support as per 802.1AS-Draft,

We can ask Alan Bartkey about his plans on ptpv2d changes related to 802.1AS-2011.

For sure ptpv2d is missing few things related to AS(I can see it is not responding to PDelay_req_message).

Apart from this, support for DM8148 h/w time stamping is not available in ptpv2d, luckily we have a reference of MPC83x h/w stamping in ptpv2d.

We can take this as a reference and make needed changes for our DM8148.

Here in India(Delhi), I am close to TI Bangalore, I am happy to share my AVB switch for couple of days or(weeks),

Mugunthan what are your plans?

Br,

Albert.

0 Mugunthan V N over 13 years ago in reply to Stephen Turner

TI__Intellectual 2750 points

Albert/Steve

I have gone through ptpv2d code, it follows different approach for hardware clock.

ptpd2 approach is already standardized by Linux Kernel and ptp clock implementation is streamed in mainline kernel tree (3.x).

Currently i am in other critical activity and have no plans for ptpv2d.

with regards

Mugunthan V N

0 Albert David over 13 years ago in reply to Mugunthan V N

Intellectual 440 points

Steve,

I got a message from Alan Bartky author of ptpv2d about the missing 802.1AS support

At this moment, It looks like, we are on our own to have needed 802.1AS support for DM8148.

Here is the Alan's message replied to me on ptpv2d google group

Albert,
The code as published consists of work done in 2007 by myself, so it does not conform to the final specification.
Contributions in this area are welcome, but unfortunately I have no time to do so.
With that, it does seem strange that a master for 802.1AS should require a valid response from a Path delay message before sending these other messages, especially announce. How would a master even find out there are other devices out there to send the path delay messages to (unless I guess it is send as multicast).
Anyway, as I said, the code is not compliant, but should be a good starting point for someone whom has the time to make it so.
Thanks,
Alan

0 Stephen Turner over 13 years ago in reply to Albert David

Genius 3476 points

Albert

FYI - A colleague of mine, Eliot Blennerhassett is contributing to a thread here:

http://e2e.ti.com/support/embedded/linux/f/354/t/159662.aspx#615584

discussing issues with the PTP support. Maybe you have seen this issue also?.

regards

Steve

0 Stephen Turner over 13 years ago in reply to Stephen Turner

Genius 3476 points

Hi Albert Wondering if you have made any progress with 802.1AS?. Did you get that Harman AVB switch?. Regards

0 Stephen Turner over 13 years ago in reply to Stephen Turner

Genius 3476 points

Hi Albert

We think we have gotten ptpd2 working with AVB switches. We have published the code on GitHub here:

https://github.com/audioscience/ptpd2

I'd appreciate your feedback if it also works for you.

regards

Steve

0 Albert David over 13 years ago in reply to Stephen Turner

Intellectual 440 points

Hello Steve,

this is a great news! I will test this on my setup using Harman/netgear AVB switch.

I will update you with my observations soon.

with best wishes,

Albert David.

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DM8148 : Ethernet IEEE 1588/802.1AS PTP Support