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

[Adrian Figueroa]

That memcpy is also used on the F7. The drivers are probably the same:

/* Copy data to Tx buffer*/
memcpy( (uint8_t*)((uint8_t*)buffer + bufferoffset), 
(uint8_t*)((uint8_t*)q->payload + payloadoffset), (ETH_TX_BUF_SIZE - 
bufferoffset) );
      
Adrian


-----Ursprüngliche Nachricht-----
Von: lwip-users [mailto:address@hidden Im Auftrag von address@hidden
Gesendet: Thursday, September 14, 2017 5:46 PM
An: Mailing list for lwIP users <address@hidden>
Betreff: Re: [lwip-users] ERR_MEM when sending large data, LWIP stats show no 
error

Adrian Figueroa wrote:
> I can see some errors in low_level_output() in ethernetif.c.
>
> This fails:
>
>        if((DmaTxDesc->Status & ETH_DMATXDESC_OWN) != (uint32_t)RESET)
>        {
>          errval = ERR_USE;
>          goto error;
>        }

I don't know the F7 driver, but my F4 driver seems to have the same code lines.
It's worse there since they even memcpy from pbufs to the DMA descriptors... :-(

Simon

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