Ethernet packets on DE-4 board

[Altera_Forum]

Can someone please tell me a way to receive Ethernet traffic on a DE-4 board? I've gone through the example provided in the tutorial, using TSE on DE-4, and it works fine. Now I need to receive actual network traffic on the DE-4. What is the easiest way to do this? 

 Thanks a lot in advance. :D

[Altera_Forum]

Your question isn't clear: if TSE on DE-4 is working fine, what more would you like to accomplish?

[Altera_Forum]

I'm sorry my qiestion wasn't so clear. What I've got working is the example provided in the TSE in DE-4 tutorial, the one where you have a loopback set on eth0 port. What I want to do now is to get Ethernet packets from another source (like a separate PC).  

 Following code is the one I've got working now.  #include <altera_avalon_sgdma.h> # include <altera_avalon_sgdma_descriptor.h> # include <altera_avalon_sgdma_regs.h> # include "sys/alt_stdio.h" # include "sys/alt_irq.h" # include <unistd.h> // Function Prototypes void rx_ethernet_isr (void *context); volatile char *onchip_control = (char *) 0x00000FFF; volatile char *onchip_data_rx = (char *) 0x00001000; volatile char *onchip_data_tx = (char *) 0x00008000; // Global Variables unsigned int text_length; // Create a transmit frame unsigned char tx_frame = { 0x00,0x00, // for 32-bit alignment 0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, // destination address (broadcast) 0x01,0x60,0x6E,0x11,0x02,0x0F, // source address 0x03,0xF0, // length or type of the payload data '\0' // payload data (ended with termination character) }; // Create a receive frame unsigned char rx_frame = { 0 }; // Create sgdma transmit and receive devices alt_sgdma_dev * sgdma_tx_dev; alt_sgdma_dev * sgdma_rx_dev; // Allocate descriptors in the descriptor_memory (onchip memory) alt_sgdma_descriptor tx_descriptor __attribute__ (( section ( ".descriptor_memory" ))); alt_sgdma_descriptor tx_descriptor_end __attribute__ (( section ( ".descriptor_memory" ))); alt_sgdma_descriptor rx_descriptor __attribute__ (( section ( ".descriptor_memory" ))); alt_sgdma_descriptor rx_descriptor_end __attribute__ (( section ( ".descriptor_memory" ))); /******************************************************************************** * This program demonstrates use of the Ethernet in the DE4 board. * * It performs the following: * 1. Records input text and transmits the text via Ethernet after Enter is * pressed * 2. Displays text received via Ethernet frame on the JTAG UART ********************************************************************************/ int main(void) { // Open the sgdma transmit device sgdma_tx_dev = alt_avalon_sgdma_open ("/dev/sgdma_tx"); if (sgdma_tx_dev == NULL) { alt_printf ("Error: could not open scatter-gather dma transmit device\n"); return -1; } else alt_printf ("Opened scatter-gather dma transmit device\n"); // Open the sgdma receive device sgdma_rx_dev = alt_avalon_sgdma_open ("/dev/sgdma_rx"); if (sgdma_rx_dev == NULL) { alt_printf ("Error: could not open scatter-gather dma receive device\n"); return -1; } else alt_printf ("Opened scatter-gather dma receive device\n"); // Set interrupts for the sgdma receive device alt_avalon_sgdma_register_callback( sgdma_rx_dev, (alt_avalon_sgdma_callback) rx_ethernet_isr, 0x00000014, NULL ); // Create sgdma receive descriptor alt_avalon_sgdma_construct_stream_to_mem_desc( &rx_descriptor, &rx_descriptor_end, (alt_u32 *)rx_frame, 0, 0 ); // Set up non-blocking transfer of sgdma receive descriptor alt_avalon_sgdma_do_async_transfer( sgdma_rx_dev, &rx_descriptor ); // Triple-speed Ethernet MegaCore base address volatile int * tse = (int *) 0x00083000; //tse.control_port at Qsys address map // Initialize the MAC address *(tse + 3) = 0x116E6001; *(tse + 4) = 0x00000F02; // Specify the addresses of the PHY devices to be accessed through MDIO interface *(tse + 0x0F) = 0x10; *(tse + 0x10) = 0x00; // Write to register 20 of the PHY chip for Ethernet port 0 to set up line loopback *(tse + 0xB4) = 0x4000; // Set the PCS to operate at SGMII mode and enable SGMII auto-negotiation *(tse + 0x94) = *(tse + 0x94) | 0x0003; // Set PHY address for accessing the PHY chip for Ethernet port 1 *(tse + 0x10) = 0x01; // Write to register 16 of the PHY to enable automatic crossover for all modes *(tse + 0xB0) = *(tse + 0xB0) | 0x0060; // Software reset the PHY chip and wait *(tse + 0xA0) = *(tse + 0xA0) | 0x8000; while ( *(tse + 0xA0) & 0x8000 ) ; // Enable read and write transfers, gigabit Ethernet operation, and CRC forwarding *(tse + 2) = *(tse + 2) | 0x0000004B; alt_printf( "send> " ); text_length = 0; while (1) { char new_char; tx_frame = '\0'; //Read the PCIe received data int i; while( *onchip_control != 'B' ) ;// polling the control byte i = 0; while( (new_char = *(onchip_data_tx + i) ) != '\n' ) { if (text_length < 1007) { // Add the new character to the output text if ( new_char >= 'a' && new_char <= 'z' ) tx_frame = new_char - 'a' + 'A'; else if ( new_char >= 'A' && new_char <= 'Z' ) tx_frame = new_char - 'A' + 'a'; else tx_frame = '#'; text_length++; // Maintain the terminal character after the text tx_frame = '\0'; } i++; } *onchip_control = 'K' ; // keep the control in the board until receive // Create transmit sgdma descriptor alt_avalon_sgdma_construct_mem_to_stream_desc( &tx_descriptor, &tx_descriptor_end, (alt_u32 *)tx_frame, 1024, 0, 1, 1, 0 ); // Set up non-blocking transfer of sgdma transmit descriptor alt_avalon_sgdma_do_async_transfer( sgdma_tx_dev, &tx_descriptor ); // Wait until transmit descriptor transfer is complete while (alt_avalon_sgdma_check_descriptor_status(&tx_descriptor) != 0) ; } return 0; } /**************************************************************************************** * Subroutine to read incoming Ethernet frames ****************************************************************************************/ void rx_ethernet_isr (void *context) { int i; // Wait until receive descriptor transfer is complete while (alt_avalon_sgdma_check_descriptor_status(&rx_descriptor) != 0) ; // Clear input line before writing for (i = 0; i < (6 + text_length); i++) { alt_printf( "%c", 0x08 ); // 0x08 --> backspace } // Output received text alt_printf( "\nreceive> %s\n", rx_frame + 16 ); while( *onchip_control != 'K' ) ;// polling the control byte for (i = 0; i < (6 + text_length); i++) { *(onchip_data_rx + i) = rx_frame; } *onchip_control = 'H' ; // pass the control right to the host PC // Reprint current input line after the output alt_printf( "\nsend> %s", tx_frame + 16 ); // Create new receive sgdma descriptor alt_avalon_sgdma_construct_stream_to_mem_desc( &rx_descriptor, &rx_descriptor_end, (alt_u32 *)rx_frame, 0, 0 ); // Set up non-blocking transfer of sgdma receive descriptor alt_avalon_sgdma_do_async_transfer( sgdma_rx_dev, &rx_descriptor ); text_length = 0; }  Thanks a lot for your time and suggestions Ted! :D