In my application, I need to recover from disconnecting the LAN cable. That is to say it no longer fetches messages from the queue feeding the task.
I have a means of detecting when traffic stops. I had tried something like this in the past, in cases when trying to change the IP address of the unit. Can LWIP be stopped, and restarted?
Has anyone accomplished this, with out doing a complete reset of the device! We were still having issue and think we found the solution.
View solution in original post. Why not just close that socket? Nice to hear from you. I have somewhat worked around the problem. It does not seem to generate an error from the write, which is what my code was expecting to happen. Lucky, I have my own status messages that are sent over the link at a regular basis. I created a periodic task, and when it sees that the status messages are not going out, I empty the queue for messages that are building up in my transmit queue.
Once the cable is reconnected, whatever was stuck in the LWIP buffers goes out, generally closing the socket, at which point I can reconnect. I tried just closing the socket when I detect the loss of status messages, but bad things happened. I would like to be able to close an restart LWIP under other situations though.
Our system has a user display on the front panel where the user can change the LAN settings DHCP or Fixed address, and in fixed mode, to change the address.
I had tried killing all the FreeRTOS tasks that I created on the way up, and then recreating them but not a lot of success there.
Not something I have not devoted a lot of time to. Well, it works on some machines and not others. The write is blocking so it seems to lock forever. I don't see any setting in the board support gui. Going to have to dig into portmicroblaze Those kind of problems can be tough. I found myself having to dig into the lwip drivers as well and finally decided to drop it.
I've been planning to try it on a future project. It at least gets rid of the RTOS integration issues in theory. The write timeout works pretty well. We are still seeing issues with how we are closing the socket, though.
At least that is our guess at this point. Sign In Help.Yes, I use the stm32 demo code, I trace the code and found that icmp handler routine is not deal with sometimes. Could you give me link for the code you post? Firmware Engineer Leader.Lwip http server by enc28j60 controlled by stm32 (part 1)
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This sounds like a driver bug. Are you using the stm32 demo code? It has this problem.Request failed with status code 500 expo
The problem is that the interrupts are being lost but the packets are still there in the hw rx buffer. You need random rx packets to trigger new interrupts. I posted some code recently that fixes this issue.
A strange problem happen after device running some days. After power on, PING response is fast. But after running some days, ping response becomes lower and timeout sometimes.
I configure ICMP checksum by hardware. Anyone has same problem? P please consider the environment before printing this email. Hi : Yes, I use the stm32 demo code, I trace the code and found that icmp handler routine is not deal with sometimes.Remember Me?
If that is the case, you will need to utilize the network analysis tools on your desktop system.Prova scritta di probabilità e statistica 1 agosto 2013
However, first please answer the following questions: 1. Are you now using a straight through cables, instead of a cross over cable?Docker windows mount volume empty
You can accomplish this by simply connecting the Ethernet ports of two known functional systems, e. Have ALL devices and systems connected been assigned the same private subnet, addresses within that subnet and with correct network masks and gateway assignments? Please list all network related assignments for each device or system. What operating system OS is your desktop system currently using?
Once you answered the above, you will need to utilize the network analysis tools provided by the OS of your desktop system. The Edge I'm using straight through cables 2. The cables and switch are ok It's windows7 Thanks for helping me out Thanks - - - Updated - - - could it be firewall, I opened it just now and I can ping that computer I'll retry again later and post Originally Posted by bianchi Once it has been unplug and left unplugged, open an elevated command window on your Windows system.
Now type the following command "arp -h" and notice it is the help screen for the arp command. I used laptop for testing stm I'll post the result After a few minutes, attempt to ping the IP address you have assigned it from the Windows system. Once the ping command has finished, enter the following command "arp -av" and post the results.
And why are they on a different subnets, in relationship to your STM32 dev board? My laptop is Wifi and LAN, I put wifi on Ok, I'll give a try I'll use switch right?
Do you mean my subnet is What function should I run to make the board knowing a ping request from computer?? It's been a bit like shooting at a moving target in the dark, blindfolded.
You are never quite sure the state of anything or what changes have transpired since the last word was typed. Troubleshooting these types of issues requires a certain level of structured discipline combined with methodical troubleshooting techniques.If you don't want to login now, you can download the software by simply providing your name and e-mail address in the form below and validating it.
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I don't know how should I configure the CubeMX or change the generated code to be able to ping my board. Memory buffers need to be assigned to RAM that can be accessed by the Ethernet peripheral. You may need to configure the MPU. In the file lan Learn more. Asked 10 months ago. Active 7 months ago. Viewed times. Codie Codie 65 9 9 bronze badges. Active Oldest Votes. You may likely need to change your linker script. Jack Jack 81 8 8 bronze badges.
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Sample lwIP applications
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The Overflow Blog. Q2 Community Roadmap. The Unfriendly Robot: Automatically flagging unwelcoming comments. Featured on Meta. Community and Moderator guidelines for escalating issues via new response…. Feedback on Q2 Community Roadmap.As you may be aware, our LwIP stack is a port of the open-source stack maintained on Savannah, and we recommend that general usage questions - those not specific to our Blackfin port - are referred to their forums and the open source community, where these sort of questions have often been asked and answered already.
A double check confirms the following: lwIP is the network protocol stack, while the "ping" command is an application that uses the stack. The lwIP stack supports ICMP - on which ping is based - but does not include a ping implementation internally just as it does not include a web server, etc - the aim is to keep the stack 'lightweight'.
There are some example applications in the contrib module of the LwIP stack, available from the Savannah pages that are not included in our port. I would recommend you take a look at the modules on Savannah. Log in. Site Search Log in. Processors and DSP More. Blackfin Processors. Blackfin Processors requires membership for participation - click to join.
Share More Cancel. Reply Cancel Cancel. Hi Sachin, As you may be aware, our LwIP stack is a port of the open-source stack maintained on Savannah, and we recommend that general usage questions - those not specific to our Blackfin port - are referred to their forums and the open source community, where these sort of questions have often been asked and answered already. Thanks craig. Thanks Prashant. Can u please tell me where is the problemthanks in advance.
how to ping using lwip
IOs are configured by Cube to their special function. With these settings, I'm still not seeing my device on my network I have tried WireShark also. What else do I miss to be able to ping it?
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