RE: lwip webserver demo not working on RM48HDK

Dustin Reynolds11

Other Parts Discussed in Thread: HALCOGENAnthony,

Yes there are two examples available for the RM46HDK that demonstrates the lwIP stack: "EMAC Driver with lwIP Demonstration" and "Hercules Safety MCU Demos".

I am able to get the Web Server example working on the "Hercules Safety MCU Demos" example but not so on the "EMAC Driver with lwIP Demonstration". I am in favor of getting the EMAC Driver example working since it uses a newer version of lwIP (1.4.1) than the "Hercules Safety MCU Demos", which uses lwIP (1.3.2).

Do you have any suggestions? In my case it fails when trying to get an DHCP address (which really means I should have posted this question as its own subject). When I configure the example as static IP, it claims to succeed but I can't detect the board on the network (going to IP in the browser fails, ping fails, network sweep fails).

Thanks,
Dustin

over 10 years ago

0 Anthony F. Seely over 10 years ago

TI__Guru 68920 points

Dustin,

No, I'm starting from a point behind where you are at the moment. I'm not even sure where to get the 2nd "Hercules Safety MCU Demos" version.

Is this where you got the lwIP demo from? processors.wiki.ti.com/.../HALCoGen_Ethernet_Driver_and_lwIP_Integration_Demonstration

0 Dustin Reynolds11 over 10 years ago in reply to Anthony F. Seely

Prodigy 70 points

Anthony,

The lwIP demo I got from here: processors.wiki.ti.com/.../HALCoGen_Ethernet_Driver_and_lwIP_Integration_Demonstration

The "Hercules Safety MCU Demos" can be found here: www.ti.com/.../hercules_safety_mcu_demos

Thanks,
Dustin

0 Anthony F. Seely over 10 years ago in reply to Dustin Reynolds11

TI__Guru 68920 points

Thanks Dustin,

So I haven't run the demo from the processor wiki since it's last update.

But let me confirm -- you have the same board and network cable setup, but your DHCP client gets an address w. the 1.3 version of the demo, and in the same setup it does *not* get an IP address with the 1.4 version of the demo (from the processor wiki) .. and that's about the crux of the problem? Also - What sort of DHCP server do you have - something sophisticated running in a corporate environment or a simple one ?

I can try to reproduce the problem -- and test on our corporate DHCP server. If I see the same then we can dig further .. but I'm also thinking a little about 'what-if' in terms of it being something on the server side.

-Anthony

0 Dustin Reynolds11 over 10 years ago in reply to Anthony F. Seely

Prodigy 70 points

Anthony,

Your summary of the problem is accurate. We have a Cisco ISA500 Small Business Security Appliance that serves as a DHCP server on our network.

For both examples I flashed them to the RM46 using the nowFlash utility, so that should take my CCS 6.0.1.00040 and HALCoGen 04.02.00 setup out of the picture.

I'm not sure if the problem is due to the lwIP version used, or the configuration of it, so your help is much appreciated.

Thanks,
Dustin

0 Dustin Reynolds11 over 10 years ago in reply to Dustin Reynolds11

Prodigy 70 points

Anthony,

I figured out the reason why DHCP isn't working on the "HALCoGen EMAC Driver with lwIP Demonstration" example: Halcogen is configured for PINMUX ->RMII when it should be configured for PINMUX->MII.

I verified it by creating a new project and importing the sources from the successful lwIP 1.3.2 example and found that it didn't work. After diff'ing the differences, I decided to switch that setting and it magically worked.

I'd be curious to know if the "HALCoGen EMAC Driver with lwIP Demonstration" works out of the box for you, and if that HALCoGen fix works for you.

Thanks,
Dustin

0 Anthony F. Seely over 10 years ago in reply to Dustin Reynolds11

TI__Guru 68920 points

Great job Dustin,

I haven't circled back yet to try out the demo, but glad you figured it out.

What board are you trying to run the test on? Is it a CNCD, or HDK?

Best Regards,
Anthony

0 Dustin Reynolds11 over 10 years ago in reply to Anthony F. Seely

Prodigy 70 points

Anthony,

It is an HDK.

Thanks,
Dustin

0 Anthony F. Seely over 10 years ago in reply to Dustin Reynolds11

TI__Guru 68920 points

Thanks Dustin,

I confirmed that the latest HDKs ship with the phy setup for MII mode. (There are some resistors that can be swapped out to make it run in RMII mode but that isn't the default).

Just want to see if we need to change anything on the Wiki or in the release package.

I checked the .hcg file in this subdirectory of the installation, and found that the HCG files were setup for MII mode.

Did you start from this folder, and generate the HCG code through HalCoGen?

or come at the problem from a different direction.

Or is it this step 6 on the WIKI that is causing confusion because it says RMII/MII?

Thanks and Best Regards,

Anthony

0 Dustin Reynolds11 over 10 years ago in reply to Anthony F. Seely

Prodigy 70 points

Anthony,

I reprogrammed the RM46 in multiple ways. For the first try I flashed the binary using nowFlashWin (so this is the binary that ships with the example):

I also built it in Code Composer Studio and loaded the corresponding.hcg file for RM46x (I believe, but I may be mistaken).

The directions for enabling "RMII/MII" is indeed confusing (Looking at the schematic for the RM46 HDK, Page 19, I can't tell which mode this board ships in.

Thanks,

Dustin

0 Anthony F. Seely over 10 years ago in reply to Dustin Reynolds11

TI__Guru 68920 points

Hi Dustin,

Ok, I was looking at RM48 since that's the title of the thread.

If you are using RM46 then I can see that the HalCoGen project IS configured for RMII mode.

I think that this is likely because the CNCD uses RMII mode and the RM46 CNCDs are more plentiful.

In any case thanks for figuring this out. I'll pass the information to the developer so we can make it more clear.

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RE: lwip webserver demo not working on RM48HDK