[ECOS] while(1) in PacketRxReady

["Srinivas Surabhi" <srinivas dot surabhi at wipro dot com>]

> Hi list,
> 
> In PacketRxReady(struct i82559* p_i82559)  of i82559.c 
> the code says that the unless some thing appears on 
> the Network card and the rxstatus bit get changed the 
> control/execution will be in while(1).
> 
>    But to my surprise when i am debugging the code
> inside while(1) , i saw it is jumping out of it for some 
> reasons even when the network connection was 
> unpluged .Is it something that the timeout was 
> set anywhere or else any seperate thread running for
> input packets processing and output packet processing.
> 
>  thanks in advance . 
> 
> Sorry for the trivial doubt but being new to RTOS concepts,
> i am eager to know the implementation . I also tried for
> the documentation of  kernel implementation of the stack,
> but of no use.
> 
> for reference, below given is some part of the code 
> inside PacketRxReady(struct i82559* p_i82559)
> 
>  while ( 1 ) {
>         cyg_uint32 rxstatus;
>         cyg_uint16 rxstatus_hi;
>         READMEM32(p_rfd + RFD_STATUS, rxstatus);
>         if (0 == (rxstatus & RFD_STATUS_C))
>             break;
>              .......... 
> 	}
> 
> regards
srinivas

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