Hi TI experts,
we are running some tests with our AM243x firmware using Profinet on our device (SDK V8.4.0.17 - profinetdevice V2.2.4 prerelease).
During these tests we sometimes experience some problems with the Ethernet communication:
No LWIP based communication seems to work - neither TCP, ICMP or ARP. This state can be achieved right after startup as well as after some previous TCP / ICMP communication.
We enabled the following debug logs in the LWIP implementation to get some more information about the error:
#define NETIF_DEBUG LWIP_DBG_ON #define IP_REASS_DEBUG LWIP_DBG_ON #define ICMP_DEBUG LWIP_DBG_ON #define ETHARP_DEBUG LWIP_DBG_ON
In our test run we had the following setup
Device connected to a PC
In that test run the log during startup looks totally valid:
[1362][] DebugP: netif: netmask of interface [1362][] DebugP: netif: GW address of interface [1362][] DebugP: netif_set_ipaddr: netif address being changed [1362][] DebugP: netif: added interface ho IP [1362][] DebugP: addr [1362][] DebugP: 192.168.100.2 [1362][] DebugP: netmask [1362][] DebugP: 255.255.255.0 [1362][] DebugP: gw [1362][] DebugP: 192.168.100.2 [1362][] DebugP: [1362][] DebugP: netif: setting default interface ho [1362][] DebugP: etharp_request: sending ARP request. [1362][] DebugP: etharp_raw: sending raw ARP packet. [1362][] DebugP: ethernet_output: sending packet 7010f9e0 [2148][] DebugP: etharp_timer [2361][] DebugP: etharp_timer [3148][] DebugP: etharp_timer [3361][] DebugP: etharp_timer [3459][] DebugP: ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:78:2d:7e:14:0c:00, type:806 [3459][] DebugP: etharp_update_arp_entry: 0.0.0.0 - 78:2d:7e:14:0c:00 [3459][] DebugP: etharp_update_arp_entry: will not add non-unicast IP address to ARP cache [3459][] DebugP: etharp_input: incoming ARP request [3459][] DebugP: etharp_input: ARP request was not for us. [3470][SoftTimerMgr0] DebugP: etharp_request: sending ARP request. [3470][SoftTimerMgr0] DebugP: etharp_raw: sending raw ARP packet. [3470][SoftTimerMgr0] DebugP: ethernet_output: sending packet 7010f9e0 [3483][] DebugP: ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:78:2d:7e:14:0c:00, type:806 [3483][] DebugP: etharp_update_arp_entry: 192.168.100.83 - 78:2d:7e:14:0c:00 [3483][] DebugP: etharp_find_entry: found empty entry 0 [3483][] DebugP: etharp_find_entry: no empty entry found and not allowed to recycle [3483][] DebugP: etharp_input: incoming ARP request [3483][] DebugP: etharp_input: ARP request was not for us. [4148][] DebugP: etharp_timer [4171][] DebugP: ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:0f:69:ff:a1:03, type:806 [4171][] DebugP: etharp_update_arp_entry: 192.168.100.3 - 00:0f:69:ff:a1:03 [4171][] DebugP: etharp_find_entry: found empty entry 0 [4171][] DebugP: etharp_find_entry: no empty entry found and not allowed to recycle [4171][] DebugP: etharp_input: incoming ARP request [4171][] DebugP: etharp_input: ARP request was not for us. [4361][] DebugP: etharp_timer [4458][] DebugP: ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:78:2d:7e:14:0c:00, type:806 [4458][] DebugP: etharp_update_arp_entry: 0.0.0.0 - 78:2d:7e:14:0c:00 [4458][] DebugP: etharp_update_arp_entry: will not add non-unicast IP address to ARP cache [4458][] DebugP: etharp_input: incoming ARP request [4458][] DebugP: etharp_input: ARP request was not for us.
After successful startup we trigger a ping call from windows command line
We got the following Log:
[171361][] DebugP: etharp_timer [172148][] DebugP: etharp_timer [172361][] DebugP: etharp_timer [172939][] DebugP: ethernet_input: dest:00:0f:69:ff:a1:78, src:78:2d:7e:14:0c:00, type:800 [172939][] DebugP: icmp_input: ping [172939][] DebugP: ethernet_output: sending packet 700dd1e0 [173148][] DebugP: etharp_timer [173361][] DebugP: etharp_timer [173940][] DebugP: ethernet_input: dest:00:0f:69:ff:a1:78, src:78:2d:7e:14:0c:00, type:800 [173940][] DebugP: icmp_input: ping [173940][] DebugP: ethernet_output: sending packet 700dd1e0 [174148][] DebugP: etharp_timer [174361][] DebugP: etharp_timer [174942][] DebugP: ethernet_input: dest:00:0f:69:ff:a1:78, src:78:2d:7e:14:0c:00, type:800 [174942][] DebugP: icmp_input: ping [174942][] DebugP: ethernet_output: sending packet 700dd1e0 [175148][] DebugP: etharp_timer [175361][] DebugP: etharp_timer [175943][] DebugP: ethernet_input: dest:00:0f:69:ff:a1:78, src:78:2d:7e:14:0c:00, type:800 [175943][] DebugP: icmp_input: ping [175943][] DebugP: ethernet_output: sending packet 700dd1e0 [176148][] DebugP: etharp_timer [176361][] DebugP: etharp_timer [177148][] DebugP: etharp_timer [177361][] DebugP: etharp_timer [178148][] DebugP: etharp_timer [178361][] DebugP: etharp_timer [179148][] DebugP: etharp_timer [179361][] DebugP: etharp_timer [180148][] DebugP: etharp_timer [180361][] DebugP: etharp_timer [181148][] DebugP: etharp_timer [181361][] DebugP: etharp_timer
If we wait some time and try to reach the device again via ping call nothing happens. The log is filled only with the etharp_timer log entries and it seems that the ethernet_input() function is not called by the "osal_task" instance (which still seems to be running in the task monitor).
DCP via PROFINET is still working in that situation.
Do you see any circumstances why ethernet_input() is not called anymore out of the "osal_task" context? We made sure that it's not called anymore by adding a log entry right after the ethernet_input() function entry.,
Best regards
Alex
