Re: [lwip-users] ERR_MEM when sending large data, LWIP stats show no error

[goldsimon]

Adrian Figueroa wrote:
>This fails:
>
>      if((DmaTxDesc->Status & ETH_DMATXDESC_OWN) != (uint32_t)RESET)
>      {
>        errval = ERR_USE;
>        goto error;
>      }
>
>When DmaTxDesc->Status  equals 818937856. What does this mean? Is the
>DMA used by something else?

I could mean your DMA buffer ring is full. You can do two things from here: 
either busy-poll until a buffer is available again or continue sending when the 
TX interrupt fires.

Simon