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TM4C1294NCPDT: Enet_TCP_ECHO SERVER

ygt ulk
Prodigy 100 points
Part Number: TM4C1294NCPDT

Tool/software:

Hello, i am trying to run Enet_TCP_ECHO SERVER example provided in examples with tivaware.

When i first run the program i realized it didn't work, because it got stuck reading the mac address which i have not programmed in.
So i  removed the mac address reading part and added it  manually.

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pui8MACArray[0] = 0x70;
pui8MACArray[1] = 0xFF;
pui8MACArray[2] = 0x76;
pui8MACArray[3] = 0x1F;
pui8MACArray[4] = 0x83;
pui8MACArray[5] = 0x79;
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX


After this change the pf4 led started blinking and pn0,pf0 was always on but i could not connect my tcp server with putty

i have entered  168.168.1.100 and port 23 in putty with telnet selected.

But it kept refusing the connection.
I looked the program and i saw it was waiting for me to give ip address, so i have changed to use static address.

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#define IPADDR(a,b,c,d) ((uint32_t)((a) | ((b) << 8) | ((c) << 16) | ((d) << 24)))
#define STATIC_IP_ADDRESS IPADDR(168,168,1,100)
#define NETMASK IPADDR(255,255,255,0)
#define GATEWAY IPADDR(168,168,1,1)
lwIPInit(g_ui32SysClock, pui8MACArray, STATIC_IP_ADDRESS, NETMASK, GATEWAY, IPADDR_USE_STATIC);
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX


i use the IPADDR function to change the values into little endian also changed values in lwipopts.h ;


#define LWIP_AUTOIP                    0

#define LWIP_DHCP                       0



But currently it is still refusing connection. 










  • 0
    TI__Guru**** 183736 points

    Hi,

      Have you tried to run your modified example on a LaunchPad? Does it work?

      Have you tried the DHCP address? Does it work?

      Why do you use 168.168.1.100 instead of 192.168.1.100? Could this be a problem? 192.168.0.0 – 192.168.255.255 is a valid range for private IP4 addresses. I'm not aware of a private address starting with 168. Are you sure this is the address you want to statically assign to your server?

    https://whatismyipaddress.com/ip/168.168.1.100

  • 0 in reply to Charles Tsai
    Prodigy 100 points

    yes the program itself reaches the main loop fine, its probably an issue with the lwip configuration.

    no i did not, i want to use a static address for my project.

    ill try changing it and see the results.

  • 0 in reply to Charles Tsai
    Prodigy 100 points

    By the way is there example udp socket project for lwip ? 

  • 0 in reply to ygt ulk
    TI__Guru**** 183736 points

    There are some Ethernet examples in this app note. TM4C129x Ethernet Applications for Lightweight IP (lwIP)

  • 0 in reply to Charles Tsai
    Prodigy 100 points

    Thank you, this is gonna be a question  about udpecho_client_lwip project

    i have programmed the mac adress and see the output from uart (I am using it with DHCP configuration).

    after a while it assigns itself an ip, but i cant ping the ip it gives me over uart.

    also when i look at ipconfig it shows that the media is disconnected even though i can see  the connection in Ethernet settings. 

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :

    i have connected the Ethernet cable to my computer and the uart.
    I am using the default configurations of the projects and it gives me an ip to connect.

    Are there more steps involved with this process ?







  • +1 in reply to ygt ulk
    TI__Guru**** 183736 points

    If you are getting an auto IP such as 169.254.xxx.xxx then it means there is no DHCP server on the network to assign an IP address to you. The stack picks a auto IP for itself. You need to find out if you have a DHCP server on you network. You can talk to your IT support.