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TDA4VM: TDA4VM LWIP ICMP

Yao Zhang
Intellectual 365 points
Part Number: TDA4VM

hi expert

sdk8.2 rtos+qnx

When I use the ping command, I find that the returned ttl is 255

I tried to change the configuration of lwip to make it equal to 64

But I found that the ttl of icmp returned by tda4 is always 255, but the ttl of tcp is 64

I changed the file of pdk8.2/transfer/lwip/

And compile with the make sdk command

Is there any way for ti to change ttl

  • 0
    TI__Mastermind 22940 points

    Hi Zhang,

    Please change the value of ICMP_TTL from "<PDK?/ti/transport/lwip/lwip-port/freertos/include/lwipopts.h" and build the required application (Ethfw, lwip example app).

    Also, we may not change ttl at run time, its single time configuration parameter during build.

    Best Regards,
    Sudheer