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63 lines
2.2 KiB
Plaintext
63 lines
2.2 KiB
Plaintext
[Note]:
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Special options setting of lwIP in this project (for using it with uC/OS-II on TI C6000 DSP)
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*******************************************************************************************
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This port was for project ucos-lwip-c6x (http://gro.clinux.org/projects/ucos-lwip-c6x/).
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For the moment we were writing this note, lwIP v1.1.0 was used in this project.
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This note was written in Jan.22 2005 by zengming99@mails.tsinghua.edu.cn.
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*******************************************************************************************
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Usually, options of lwIP can be set in file "lwipopts.h".
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It was included by "opt.h", amd all options would be set as default value in "opt.h"
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if they were not defined in "lwipopts.h".
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Each project should have its own "lwiports.h", and keep "opt.h" as it was.
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In this project, for making lwIP work with uC/OS-II on a 32bits TI DSP,
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following options should be set:
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------------------------------------------------------------------------------------
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1. Define symbol "LWIP_PROVIDE_ERRNO" in compiler of CodeComposerStudio
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2. #define MEM_ALIGNMENT 4 (in "lwipopts.h" )
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#define ETH_PAD_SIZE 2 (in "lwipopts.h" )
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For the struct align problem on 32bits DSP.
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3. #define ARP_QUEUEING 0 (in "lwipopts.h")
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ARP_QUEUEING has a bug in lwIP v1.0.0 with TCP
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4. #define LWIP_TASK_MAX 5 (in "sys_arch.h" )
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#define LWIP_START_PRIO 10 (in "sys_arch.h" )
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#define TCPIP_THREAD_PRIO 5 (in "lwipopts.h" )
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The default TCPIP_THREAD used priority 5.
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And, 5 lwIP threads were allowed, user defined lwIP thread should have its priority between 10 ~ 14.
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5. #define SYS_LIGHTWEIGHT_PROT 1 (in "lwipopts.h" )
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#define SYS_ARCH_DECL_PROTECT(lev) (in "sys_arch.h" )
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#define SYS_ARCH_PROTECT(lev) OS_ENTER_CRITICAL() (in "sys_arch.h" )
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#define SYS_ARCH_UNPROTECT(lev) OS_EXIT_CRITICAL() (in "sys_arch.h" )
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These were very important when ethernet driver used intrrupt to check packet
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and pBuf function was called in ISR. Or else, uC/OS-II would run away.
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A much better and clean method is to set up a thread for the driver, in ISR
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just check packet and post MailBox to the thread.
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Zeng, Ming
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2005-01-18 |