Re: [lwip-users] lwip performance goes down if running with FreeRTOS

[vincent cui]

Hi kir:

 

I enable LWIP debug for detect memory and heap problem. Both are ok .

 

The code is used found the current received frame, then release it to DMA. 

 

 

From: lwip-users-bounces+address@hidden [mailto:lwip-users-bounces+address@hidden On Behalf Of Krzysztof Weso?owski
Sent: 2012年5月11日 15:10
To: Mailing list for lwIP users
Subject: Re: [lwip-users] lwip performance goes down if running with FreeRTOS

 

On Fri, May 11, 2012 at 8:46 AM, vincent cui <address@hidden> wrote:

 

HI :

 

You use MTU SIZE as RX buffer,  in ST code, it define RX buffer like uint8_t Rx_Buff[ETH_RXBUFNB][ETH_RX_BUF_SIZE];

 

So, you only set ETH_RXBUFNB to 1 ?

 

No, as in ST code i use ETH_RX_BUF_SIZE >= MTU size and multiple buffers. Hovewer in RX interrupt i can assume that only current buffer has been filled.

 

It might be useful if you to attach ISR code and ETH_Get_Received_Frame_interrupt();

 

Can you explain what this code do:

  /* Check if received frame with multiple DMA buffer segments */
  if (DMA_RX_FRAME_infos->Seg_Count > 1)
  {
    DMARxNextDesc = DMA_RX_FRAME_infos->FS_Rx_Desc;
  }
  else
  {
    DMARxNextDesc = frame.descriptor;
  }

 

Regards,

Krzysztof