RTOS/TM4C1294NCPDT: IOT and Web Server can not use in the same time

Hi,

 Did you have a chance to try out the HTTP GET example shown below? You can download from the CCS Resource Explorer. 

Dear Charles,

The example is client, i want build web server by the TM4C1294,

thanks

BR,

Louis

Hi,
There is some TI-RTOS HTTP Server example in this wiki page. processors.wiki.ti.com/.../TI-RTOS_HTTP_Example

Dear Charles,

I have used the same method to build my web server.

When the system doesn't  connect to the cloud server, i can use chrome to connect to my web server.

When the system connects to the cloud server, i can not use chrome to connect to my web server and the chrome also show ERR_EMPTY_RESPONSE.

Thanks.

BR,

Louis

Hello Louis,

I'd like to get a few pieces of information from you to determine what the problem is.

1. Can you take a Wireshark capture (and upload it) of when your are trying to connect the web server and you don't see a response? Please also list which IP address is the target's and which is the PC's.
2. Please attach your full *.cfg file
3. Try connecting with a browser other than chrome, just to see if it happens in other browsers. 

Regards,

Dalton

Dear Dalton,

1. The Wireshark capture:

The device IP: 192.168.1.187, The PC IP: 192.168.1.192

2. The .cfg file:tcpEcho.cfg

BR,

Louis

Hi Louis,

Can you attach the wireshark capture file too?

Regards,
Dalton

Dear Dalton,

When i modify Global.ndkThreadStackSize from 2048 to 1536, Global.highTaskStackSize from 4096 to 1536, and Global.memRawPageCount from 8 to 24, and then i can connect to the web server and cloud in the same time.
But why? Is there taking about the stack size?
thanks

BR,
Louis

Hello Louis,

I think you changing the Global.memRawPageCount from 8 to 24 is what fixed it for you. If there was some stack overflow issue then it would likely have resulted in the app crashing.

The memRawPageCount increases the size of a memory allocation pool that’s used for allocating Ethernet frames, so if you didn’t have enough memory available in the pool, incoming packets get dropped and that might explain what you were seeing.

Regards,
Dalton

Dear Dalton,

I try memRawPageCount  back to 8 and ndkThreadStackSize back to 2048, the system works fine too.

It looks like only modifying the highTaskStackSize, the system can run both.

But why? lowTaskStackSize? normTaskStackSize? highTaskStackSize?

Does there have some information to talking about this issue?

Thanks

BR,

Louis

Hello Louis,

That seems strange. We will need to gain some more understanding about what was happening during the failure you had. Can you please attach the Wireshark capture corresponding to the screen shot you posted, above?

Regards,

Dalton

Dear Dalton,

The Wireshark capture:

Capture.rar

The filter: ip.src == 192.168.1.244 or eth.src==54:10:EC:93:58:D0,

The Device IP is 192.168.1.244, and the PC IP is 192.168.1.192

thanks

BR,

Louis

Hey Louis, 

Thanks for attaching that. We can see that the TCP connection is completing, but is then immediately being closed. We are looking into how that might relate to the changes you made.

Regards,

Dalton

Dear Dalton,

1. How can i view the global variable "tcps"?

2. The Heap Mem:

    Before:

    After:

BR,

Louis

Dear Dalton,

When i modify the Heap Memory Size, it looks work fine. The web and the cloud can work together.
But why it happen?
thanks

BR,
Louis

Louis,

Did this get resolved?

Todd

Dear Todd,

Yes, it was.
Thanks.

BR,
Louis