Content originally posted in LPCWare by ashgupta28 on Wed Feb 18 01:53:35 MST 2015
Hello,
I am using custom board with LPC18xx with Micrel KSZ8873. I had configured ethernet switch port 3 as RMII with LPC18xx. I am also getting RX data packets on Oscilloscope at RMII RXD lines but these packets are not visible on DMA RX buffer.
These are the ethernet settings i am doing:-
Chip_ENET_RMIIEnable(LPC_ETHERNET);
Chip_Clock_EnableOpts(CLK_MX_ETHERNET, true, true, 1);
reset(pENET);
/* Setup MII link divider to /102 and PHY address 1 */
//Chip_ENET_SetupMII(pENET,div, 1);
/* Enhanced descriptors, burst length = 1 */
pENET->DMA_BUS_MODE = DMA_BM_ATDS | DMA_BM_PBL(1) | DMA_BM_RPBL(1);
/* Initial MAC configuration for checksum offload, full duplex,
100Mbps, disable receive own in half duplex, inter-frame gap
of 64-bits */
pENET->MAC_CONFIG = MAC_CFG_BL(0) | MAC_CFG_IPC | MAC_CFG_DM |
MAC_CFG_DO | MAC_CFG_FES | MAC_CFG_PS | MAC_CFG_IFG(3);
/* Setup default filter */
pENET->MAC_FRAME_FILTER = MAC_FF_PR | MAC_FF_RA ;
/* Flush transmit FIFO */
pENET->DMA_OP_MODE = DMA_OM_FTF;
/* Setup DMA to flush receive FIFOs at 32 bytes, service TX FIFOs at
64 bytes */
pENET->DMA_OP_MODE |= DMA_OM_RTC(1) | DMA_OM_TTC(0);
/* Clear all MAC interrupts */
pENET->DMA_STAT = DMA_ST_ALL;
/* Enable MAC interrupts */
pENET->DMA_INT_EN = 0;/* Enable MAC interrupts */
Board_ENET_GetMacADDR(macaddr);
Chip_ENET_SetADDR(LPC_ETHERNET, macaddr);
/* Setup descriptors */
InitDescriptors(TXDescs, ENET_NUM_TX_DESC, RXDescs, ENET_NUM_RX_DESC);
/* Attach a buffer to a RX descriptor and queue it for receive */
i = 0;
while (i < ENET_NUM_RX_DESC) {
ENET_RXQueue(RXBuffer, EMAC_ETH_MAX_FLEN);
i++;
}
static_txNextIndex = 0;
Chip_ENET_RXStart(LPC_ETHERNET);
/* Enable RX/TX after descriptors are setup */
Chip_ENET_TXEnable(LPC_ETHERNET);
Chip_ENET_RXEnable(LPC_ETHERNET);
/* Check for receive packets */
workbuff = ENET_RXGet(&rxBytes); Here Inside, code is NOT going inside the loop :-
if ((rxAvail < rxNumDescs) && (!(RXDescs[rxGet].STATUS & RDES_OWN))) {
Please suggest some settings that i have missed out.
Ashish Gupta
Please suggest what settings i have missed out.
