Re： Re: [lwip-users] Can't send the data by R aw API

[陳 小擁]

Hi Sathya:

    thanks for your help. however, how can i check the tcp send buffer? which function can i use ? or i have to write it by myself ? someone have told me that if i want to use tcp_write , i have use tcp_output follow it .

>     temp_pcb = tcp_active_pcbs ;
>    err = tcp_write(temp_pcb , &abc[j] , sizeof(abc[j]),0) ;
>    tcp_output(temp_pcb) ;

is it right? thanks again !

 

> You will need to keep checking the tcp send buffer for the amount of space left in the buffer before you call tcp_write. Keep calling a function that checks the tcp snd buf for space available and send accordingly.
>
> hope this helps
>
> Sathya

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