Цитата
Еще вы не уточнили какой камень ?
Камень у меня stm32f207. Изначально взял пример веб сервера с их сайта.
Сделал измнения в файле ethernetif.c :
Код
void ethernetif_input(void * pvParameters)
{
struct pbuf *p;
for (;;) {
if (xSemaphoreTake( s_xSemaphore, emacBLOCK_TIME_WAITING_FOR_INPUT) == pdTRUE) {
TRY_GET_NEXT_FRAGMENT:
p = low_level_input(s_pxNetIf);
if (p != NULL) {
if (ERR_OK != s_pxNetIf->input(p, s_pxNetIf)) {
pbuf_free(p);
p = NULL;
} else {
xSemaphoreTake( s_xSemaphore, 0);
goto TRY_GET_NEXT_FRAGMENT;
}
} else {
//PHY buffer is empty, continue to wait for ISR
}
}
}
}
Код
static struct pbuf * low_level_input(struct netif *netif)
{
struct pbuf *p, *q;
u16_t len;
uint32_t l = 0, i = 0;
FrameTypeDef frame;
u8 *buffer;
__IO ETH_DMADESCTypeDef *DMARxNextDesc;
p = NULL;
/* Get received frame */
frame = ETH_Get_Received_Frame_interrupt();
/* Check if really we have something or not */
if (frame.descriptor==NULL) return p;
/* check that frame has no error */
if ((frame.descriptor->Status & ETH_DMARxDesc_ES) == (uint32_t) RESET)
{
/* Obtain the size of the packet and put it into the "len" variable. */
len = frame.length;
buffer = (u8 *) frame.buffer;
/* We allocate a pbuf chain of pbufs from the pool. */
p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
/* Copy received frame from eth....and so on the code under that text remains untouched*/
if (p != NULL)
{
for (q = p; q != NULL; q = q->next)
{
memcpy((u8_t*)q->payload, (u8_t*)&buffer[l], q->len);
l = l + q->len;
}
}
}
/* Release descriptors to DMA */
/* 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;
}
/* Set Own bit in Rx descriptors: gives the buffers back to DMA */
for (i=0; i<DMA_RX_FRAME_infos->Seg_Count; i++)
{
DMARxNextDesc->Status = ETH_DMARxDesc_OWN;
DMARxNextDesc = (ETH_DMADESCTypeDef *)(DMARxNextDesc->Buffer2NextDescAddr);
}
/* Clear Segment_Count */
DMA_RX_FRAME_infos->Seg_Count =0;
/* When Rx Buffer unavailable flag is set: clear it and resume reception */
if ((ETH->DMASR & ETH_DMASR_RBUS) != (u32)RESET)
{
/* Clear RBUS ETHERNET DMA flag */
ETH->DMASR = ETH_DMASR_RBUS;
/* Resume DMA reception */
ETH->DMARPDR = 0;
}
return p;
}
Все эти изменения были описаны на этом же фоуме. Так получается еще что-то надо подправлять?
lwip 1.4.0 и несколько потоков, Возможна ли стабильная работа lwip на несколько потоков?
Dec 28 2012, 13:52
