I installed RTX (rtos from Keil) and Ethernet library from STM for stm32f207 MC. I configured UDP using ethernet + LwIP as in examples from STM.
Without RTOS UDP works fine. I send and get packets without any problems, but with RTOS (RTX in my case) i can only send packets with ARP-request but can't get packets due to i have no ethernet interrupts on receiving packets (can't get ETH_DMA_FLAG_R flag). I know, that there are reciving packets because i see them in Wireshark.
So, that's how i configure Ethernet interrupts:
extern ETH_DMADESCTypeDef DMARxDscrTab[ETH_RXBUFNB], DMATxDscrTab[ETH_TXBUFNB]; /* Ethernet Receive buffers */ extern uint8_t Rx_Buff[ETH_RXBUFNB][ETH_RX_BUF_SIZE]; /* Ethernet Transmit buffers */ extern uint8_t Tx_Buff[ETH_TXBUFNB][ETH_TX_BUF_SIZE]; ... ETH_DMATxDescChainInit(DMATxDscrTab, &Tx_Buff[0][0], ETH_TXBUFNB); /* Initialize Rx Descriptors list: Chain Mode */ ETH_DMARxDescChainInit(DMARxDscrTab, &Rx_Buff[0][0], ETH_RXBUFNB); /* Enable Ethernet Rx interrrupt */ for(i=0; i<ETH_RXBUFNB; i++) { ETH_DMARxDescReceiveITConfig(&DMARxDscrTab[i], ENABLE); } for(i=0; i<ETH_TXBUFNB; i++) { ETH_DMATxDescTransmitITConfig(&DMATxDscrTab[i], ENABLE); } NVIC_EnableIRQ(ETH_IRQn); ... void ETH_IRQHandler(void) { /* CANNOT ENTER HERE */ if (ETH_GetDMAFlagStatus(ETH_DMA_FLAG_R) == SET) { /* Give the semaphore to wakeup LwIP task */ sys_sem_signal(&s_xRxSemaphore); } /* Clear the interrupt flags. */ /* Clear the Eth DMA Rx IT pending bits */ ETH_DMAClearITPendingBit(ETH_DMA_IT_R); ETH_DMAClearITPendingBit(ETH_DMA_IT_NIS); } So, as i said, Wireshark shows me that there are answers with ARP-requests with mac-adress, but i can't enter in interrupt to process them.
