[lwip-users] About PPP task priority

[yueyue papa]

Hi all,

 

I am struggingling the lwIP + PPP.  My system OS is ucOS likes. My hardware do not have LAN interface. PPP is use for GPRS module

 

1. For multi thread environement

   u32_t sys_arch_protect()
   void sys_arch_unprotect(u32_t pval)
  

   Should the protect implement by the lock? 

   In the sys_arch.txt. 

   It said

   * the API is used to disable task swtich

   * the API could be implement by disable ISR.

 

   I am a little confused about it. I study the code, and only find the code is used for ++, --, so I think in multi task environeemnt, the lock implement is enough.  Am I right?

 

2. What is the suggestion task priority?

    PPP task priority > TCP/IP task priorty.

  

    My system preemptive system, so what is suggest task priorty?

 

Lee