Hi,
I have the Ethernet port working (Tx and Rx). All frames are correct except for the ping reply message where wireshark is reporting a Crc error.
// Configure for use with the internal PHY.
EMACPHYConfigSet( EMAC0_BASE,
EMAC_PHY_TYPE_INTERNAL |
EMAC_PHY_INT_MDIX_EN |
EMAC_PHY_AN_100B_T_FULL_DUPLEX);
// Initialize the MAC and set the DMA mode.
EMACReset(EMAC0_BASE); // Reset the MAC.
EMACInit(EMAC0_BASE,gSysCtlClock,
EMAC_BCONFIG_MIXED_BURST |
EMAC_BCONFIG_PRIORITY_FIXED,
4,
4,
0);
EMACConfigSet(EMAC0_BASE,
( EMAC_CONFIG_FULL_DUPLEX | //operate in full- or half-duplex mode
EMAC_CONFIG_CHECKSUM_OFFLOAD | //enables header checksum checking
EMAC_CONFIG_7BYTE_PREAMBLE | //number of bytes of preamble added
//to the beginning of every transmitted
//frame
EMAC_CONFIG_IF_GAP_96BITS | //interframe gap between transmitted
//frames
EMAC_CONFIG_USE_MACADDR0 | //which MAC address is used during
//insertion or replacement for all
//transmitted frames
EMAC_CONFIG_SA_FROM_DESCRIPTOR | //Control over insertion or replacement
//of the source address in all
//transmitted frames
EMAC_CONFIG_BO_LIMIT_1024 ), //The back-off limit determines the
//range of the random time that the MAC
//delays after a collision and before
//attempting to retransmit a frame.
( EMAC_MODE_RX_STORE_FORWARD | //receive DMA to read frames from
//the FIFO only after the complete
//frame has been written to it.
//If this mode is enabled, the
//receive threshold is ignored.
EMAC_MODE_TX_STORE_FORWARD | //start transmitting a frame only
//after the whole frame has been
//written to the transmit FIFO.
//If this mode is enabled, the
//transmit threshold is ignored.
EMAC_MODE_TX_THRESHOLD_64_BYTES | //transmit FIFO threshold
EMAC_MODE_RX_THRESHOLD_64_BYTES ), //receive FIFO threshold
0);
for(ui32Loop = 0; ui32Loop < NUM_TX_DESCRIPTORS; ui32Loop++)
{
//DES0
//control and status bits
//Bit 31 is the ``OWN'' bit which, when set, indicates
//that the hardware has control of the descriptor.
g_psTxDescriptor[ui32Loop].ui32CtrlStatus =(
DES0_TX_CTRL_LAST_SEG |
DES0_TX_CTRL_FIRST_SEG |
DES0_TX_CTRL_INTERRUPT | //send interrupt on completion
DES0_TX_CTRL_CHAINED); //DES3 contains next descriptor address
// DES0_TX_CTRL_IP_ALL_CKHSUMS);//insert CRC
// DES0_TX_CTRL_REPLACE_CRC); //updated and replace CRC
// DES0_TX_CTRL_NO_CHKSUM); //don't insert CRC
//DES1
//size of the buffer attached to the descriptor and various control bits
g_psTxDescriptor[ui32Loop].ui32Count = (
DES1_TX_CTRL_SADDR_NONE |
(TX_BUFFER_SIZE << DES1_TX_CTRL_BUFF1_SIZE_S));
//DES2
//pointer to the buffer containing the data to transmit
g_psTxDescriptor[ui32Loop].pvBuffer1 = g_pui8TxBuffer;
//DES3
//set the next descriptor address
g_psTxDescriptor[ui32Loop].DES3.pLink =
(ui32Loop == (NUM_TX_DESCRIPTORS - 1)) ?
g_psTxDescriptor : &g_psTxDescriptor[ui32Loop + 1];
}
Can anyone tell me what could be the problem?
Khaled.
