TM4C1294NCPDT: Facing data leak issues

R & D

Part Number: TM4C1294NCPDT

I have developed a code for tcp/ip communication using TI RTOS tcp echo example. I have configured one device as master and five slave devices. When three slaves are in the communication loop with master it works properly, but apart from this if I add one more slave to the communication loop the data in the master device gets corrupted without any action from microcontroller side. It also crashes the code if more than three slaves are trying to communicate with master. I tried to increase the stake size for microcontroller but didn't have any luck in doing so.

Please help me with this.

Regards,

sagar

over 2 years ago

0 Charles Tsai over 2 years ago

TI__Guru**** 191486 points

Hi,

It may have something to do with the heap memory allocation or memory leak. Please see if the below posts are helpful.

https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1048358/tm4c129encpdt-ndk-2-24-03-35-on-tm4c129encpdt-http-server-parallel-chrome-requests-problem

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/518321/tm4c1294ncpdt-tcp-connections-memory-usage

https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/818328/rtos-tm4c1294ncpdt-http-server-causing-heap-memory-issue

0 R & D over 2 years ago in reply to Charles Tsai

Intellectual 560 points

Thanks Charles for replying.

I tried above configurations and I am getting a warning regarding program.heap. I don't know how to fix this warning

Also can you tell me what is the relation between system stack size and heap size so that I can configure these sizes properly?

Where can I find the above settings of memory management buffer?

Regards,
Sagar

0 Charles Tsai over 2 years ago in reply to R & D

TI__Guru**** 191486 points

Hi,

You can find the Program Heap in below tab. For stack vs. heap, it is not a MCU question but more a C programming question. Here is an article about and you can also do Google search to find more information.

https://www.geeksforgeeks.org/stack-vs-heap-memory-allocation/

https://hackr.io/blog/stack-vs-heap

Also to give you a heads-up, I will be on vacation until next Wednesday and my response will be delayed.

0 R & D over 2 years ago in reply to Charles Tsai

Intellectual 560 points

master.zip peripheralConfigure.zip slave.zip 6116.tcpEcho.cfg

Hi Charles,

As per your suggestion I configured the heap size. I have attached my code for master and slave devices. In master.c I have used a buffer named "ethernetPacketBuf[4096]", I am getting data through UART and storing in this buffer. I am receiving 3600 bytes to be stored in this buffer but still the issue of data leak is observed. I have also attached the config fie of the project here.

Looking forward for your reply.

Regards

Sagar

0 Charles Tsai over 2 years ago in reply to R & D

TI__Guru**** 191486 points

Hi Sagar,

I found this thread that there are some known issues with TI-RTOS NDK. Particularly the below two issues may be related to yours but I'm not sure. Can you please take a look at the below two issues and their workaround and see if they make a difference.

TIRTOS-1488: "NDK can get into a state where unable to transmit packets". Please refer to this forum thread for the description of the problem and work-around: https://e2e.ti.com/support/microcontrollers/tiva_arm/f/908/t/674812

TIRTOS-1551: "TM4C EMAC driver does not reset read/write indexes on restart of NDK". Please refer to this forum thread for the description of the problem and work-around: https://e2e.ti.com/support/microcontrollers/tiva_arm/f/908/t/710149

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TM4C1294NCPDT: Facing data leak issues