TMS320F28388D: enet_lwip demo with DHCP

Markus A

Part Number: TMS320F28388D
Other Parts Discussed in Thread: C2000WARE

Dear support team,

I am currently running the C2000 Starterware demo "enet_lwip" using a static IP address.
This works very well (TI responds to ICMP and HTTP).

When I try to switch to DHCP instead of a static IP address, nothing happens.
"Nothing" means: No ARP or UDP packets are sent from the TI.
(I use Wireshare as packet sniffer)

In the lwipopts.h file I changed:
* LWIP_DHCP = 1
* LWIP_UDP = 1

When calling the "lwIPInit" function, I changed the last argument from "IPADDR_USE_STATIC" to "IPADDR_USE_DHCP".

Is the DHCP option even available in this implementation type / demo setup?

Thank you,
Markus

over 4 years ago

0 @vince over 4 years ago

Intellectual 651 points

hi，Markus Aigner

I was also thinking about setting up the 28388D evaluation board to automatically obtain IP from the switch.
I also found that under the enet_lwip project, there is a mode for obtaining an IP address by default on line 364 of the lwiplib.c file. It is recommended to also modify it and have a try. As shown below:

vince

0 @vince over 4 years ago

Intellectual 651 points

hi，Markus Aigner

Has it been adjusted on your side?

+1 Yashwant Temburu1 over 4 years ago

TI__Expert 4145 points

Hi Markus,

We have not tested enet_lwip example with DHCP. You may want to look into some opensource lwIP forums for how to enable it.

We do have an RTOS based TCP/IP example (tcpEcho) which uses DHCP. You can find it here C2000Ware_3_04_00_00\libraries\communications\Ethernet\ti\ndk\examples\tcpEchoF2838X in C2000Ware.

Thanks,

Yashwant

0 Markus A over 4 years ago in reply to @vince

Intellectual 435 points

Hallo vince,

thank you for this info.
I changed the setting (additionally to the 2 other settings, LWIP_DHCP and LWIP_UDP).
Unfortuntaly, it does not make any difference.

Kind regards,
Markus

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TMS320F28388D: enet_lwip demo with DHCP