[lwip-users] How to use RawAPI to send the data ?

[陳 小擁]

Hi, all :

    I am going to use RawAPI to send the data between PC to my platform based on ARM. my platform can recieved data form PC now . However , when i try to send data form my platform to PC , it dosen't work ! my code is below :

 

if(tcp_sndbuf(pcb) < hs->left) {
    len = tcp_sndbuf(pcb);
  } else {
    len = hs->left;
  }

  do {
    err = tcp_write(pcb, hs->file, len, 0);
    if(err == ERR_MEM) {
      len /= 2;
    }
  } while(err == ERR_MEM && len > 1); 
 
  if(err == ERR_OK) {
    hs->file += len;
    hs->left -= len;
  }

 

Is it somthing wrong in this code ? Can someone tell me how to send data by RawAPI . Thanks !

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