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FreeRTOS Support ArchiveThe FreeRTOS support forum is used to obtain active support directly from Real Time Engineers Ltd. In return for using our top quality software and services for free, we request you play fair and do your bit to help others too! Sign up to receive notifications of new support topics then help where you can.
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FreeRTOS+TCP. Creating new socket after FreeRTOS_closesocket()Posted by yanvasilij on June 29, 2017 Hello! Does I understed correct after FreeRTOSclosesocket() (for example when connection is lost) I must to create new socket with FreeRTOSsocket() to reopen connection, and I must not to use old socket value. Does this kind of socket creation uses dinamic memory allocation even I need only one open socket? Does it could couse memory fragmentation if I use heap_1? Regards, Vasilij FreeRTOS+TCP. Creating new socket after FreeRTOS_closesocket()Posted by rtel on June 29, 2017 Once a socket is closed it cannot be used again. If you want another socket then you need to create it again. The socket is allocated using a call to pvPortMallocSocket(). By default that will call pvPortMalloc(), but you can re-define the behaviour by #defining pvPortMallocSocket() in FreeRTOSIPConfig.h to do whatever you want it to do. Fro example: define pvPortMallocSocket( x ) MyStaticAllocator( x )
(where MyStaticAllocator() would be something you provided). heap1 cannot free memory, so don't use that. Heap4 will guard against memory fragmentation as much as it can. FreeRTOS+TCP. Creating new socket after FreeRTOS_closesocket()Posted by yanvasilij on June 30, 2017 Thank you a lot for explanation! It helped.
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NXP tweet showing LPC5500 (ARMv8-M Cortex-M33) running FreeRTOS.
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