lpcware

Memory allocation fail after some time in lwip stack for lpc1833 controller.

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by jbhoi on Tue Oct 07 03:13:49 MST 2014
Hi,

I am working on LPC1833 microcontroller and used lwip stack v1.4.1 and freeRTOS v7.3.0.

I am successfully able to up and run the stack and ping this controller from other device. But this work for sort time(around 2 to 3 minutes) after that ping is lost.I have trace the issue in which mem_malloc function fails to allocate memory.The Flow of code it as follows(From top to bottom)

    vPacketReceiveTask
                   |
     lpc_enetif_input
                   |
     lpc_low_level_input
                   |
         lpc_rx_queue
                   |
           pbuf_alloc
                   |
           mem_malloc



Now one interesting thing is ping is successfully working until 1536 bytes successfully allocated and when allocation fail start for those bytes then ping is lost.1536 bytes is buffer length of ethernet buffer.

Any one idea about issue?

Regards,
Jayesh

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