Осваиваем Ethernet в STM32

ETH_InitTypeDef ETH_InitStructure;
ETH_DMADESCTypeDef  DMARxDscrTab[ETH_RXBUFNB], DMATxDscrTab[ETH_TXBUFNB];
u8 Rx_Buff[ETH_RXBUFNB][ETH_MAX_PACKET_SIZE], Tx_Buff[ETH_TXBUFNB][ETH_MAX_PACKET_SIZE]; 

int main(void)
{
SysTick_Config(SystemCoreClock/1000);
RCC_Configuration();
NVIC_Configuration();
GPIO_PinRemapConfig(GPIO_Remap_ETH, DISABLE); 
GPIO_ETH_MediaInterfaceConfig(GPIO_ETH_MediaInterface_MII);
RCC->CFGR |= RCC_CFGR_MCO_HSE;
GPIO_Configuration();
  
 ETH_DeInit();
 ETH_SoftwareReset();
 while(ETH_GetSoftwareResetStatus()==SET);

 ETH_StructInit(&ETH_InitStructure);
 /*------------------------   MAC   -----------------------------------*/
 ETH_InitStructure.ETH_AutoNegotiation = ETH_AutoNegotiation_Enable ;  
 ETH_InitStructure.ETH_Speed = ETH_Speed_100M;                                      
 ETH_InitStructure.ETH_LoopbackMode = ETH_LoopbackMode_Disable;
 ETH_InitStructure.ETH_Mode = ETH_Mode_FullDuplex;
 ETH_InitStructure.ETH_RetryTransmission = ETH_RetryTransmission_Disable;
 ETH_InitStructure.ETH_AutomaticPadCRCStrip = ETH_AutomaticPadCRCStrip_Disable;  
 ETH_InitStructure.ETH_ReceiveAll = ETH_ReceiveAll_Enable;
 ETH_InitStructure.ETH_BroadcastFramesReception = ETH_BroadcastFramesReception_Disable;      
 ETH_InitStructure.ETH_PromiscuousMode = ETH_PromiscuousMode_Disable;
 ETH_InitStructure.ETH_MulticastFramesFilter = ETH_MulticastFramesFilter_Perfect; 
 ETH_InitStructure.ETH_UnicastFramesFilter = ETH_UnicastFramesFilter_Perfect; 
 /* Configure ETHERNET */
 Value = ETH_Init(&ETH_InitStructure, PHY_ADDRESS);
 
 /* Initialize Tx Descriptors list: Chain Mode */
 ETH_DMATxDescChainInit(DMATxDscrTab, &Tx_Buff[0][0], ETH_TXBUFNB);
 /* Initialize Rx Descriptors list: Chain Mode  */
 ETH_DMARxDescChainInit(DMARxDscrTab, &Rx_Buff[0][0], ETH_RXBUFNB);

 //Разрешаем прием
 DMARxDscrTab -> Status = ETH_DMARxDesc_OWN;
 
 /* Enable MAC and DMA transmission and reception */
 ETH_Start();  

while(1)
{
	RecievePacket();
}

}

void RecievePacket(void)
{
if ((DMARxDscrTab->Status & ETH_DMARxDesc_OWN)==0)
{	
			//Сначала отключаем прием
			ETH_DMAReceptionCmd(DISABLE);
		
			for (i=0; i<43; i++)
			{		
				data[i]=Rx_Buff[0][i];
			}
			//отдаем дескриптор в руки DMA Ethernet
			DMARxDscrTab -> Status = ETH_DMARxDesc_OWN;
			ETH_DMAReceptionCmd(ENABLE);

}