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Re: [lwip-users] demo web refresh down

From: Vincent Cui
Subject: Re: [lwip-users] demo web refresh down
Date: Sat, 23 Aug 2014 03:43:35 +0000



By check http://www.lpcware.com/content/faq/malloc-failure-using-freertos-heap3c-lpcxpresso-tool-chain

I found that heap is real overfollow once more request coming in frequency. More memory is not free on time.

In real application, FreeRTOS and LWIP also use C lib malloc and free function in case of

1.       Freertos use heap3.c

2.       popt.h define

#define MEM_LIBC_MALLOC                 1

#define MEMP_MEM_MALLOC                 1


How to fix the issue of heap overflow ?




Vincent Cui
Firmware Engineer Leader

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From: Vincent Cui
Sent: 2014
823 10:46
To: Vincent Cui; 'Mailing list for lwIP users'
Subject: RE: demo web refresh down




I define  following to use system malloc and free

#define MEM_LIBC_MALLOC                 1

#define MEMP_MEM_MALLOC                 1


I found that the malloc memory is not free on time, so malloc failure in new request coming.


It seems to need some protect those . Am I right ?



From: Vincent Cui
Sent: 2014
823 9:50
To: address@hidden
Subject: demo web refresh down




I use LPCXPRESSO to develop a simple demo server with NETCONN api on LPC1769

If the demo server refresh itself per 3 second, it works well.

If I refresh it by press F5 frequencely, it halt and can’t connect to host..


Who know the reason ?



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