Hi, Everyone. I think I haved found the reason. If where somebody meet this problem, maybe it can be referenced. It is a mistake in my porting. I used RAW API, it forgot to enable "SYS_LIGHTWEIGHT_PROT". functions like memp_free(), pbuf_free() should be mask interrupt when it using "memp_tab[]". It is globle. So if you use these function in ISR, it will be destroy the link of pbuf. Make sure to lock the globle dada. I hope this can be usedful.
Best regards! Locke_h 2008-10-27 发件人： [EMAIL PROTECTED] 发送时间： 2008-10-24 17:56:14 收件人： [email protected] 抄送： 主题： [lwip-users] How can I slow down the speed to receive with RAW API? Hi, Every one! My LwIP works on MCU with a 32KB SRAM.(Freescale MCF52235) I port the "echo" function to my project. http://download.savannah.gnu.org/releases/lwip/contrib-1.3.0.zip lwip/contrib/ports/unix/proj/minimal/echo.c I connected a client to LwIP, with is made by VC. This tool software has no problem. It can works well with long time. But sometimes if I make rush data to LwIP. It will report that can not allocate pbuf in low_level_input(). And the packets most are droped. The remained pbuf can not be free by LWIP. I don't know why. Could you please offer some advize? Thank you! Best Regards! 2008-10-24
_______________________________________________ lwip-users mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/lwip-users
