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Porting FreeRTOS+TCP to NXP LPC4088 ARM CortexM4F based microcontroller

Posted by andymcc0 on January 9, 2015

I have made a start on this port, though I have a long way to go, and I have been checking back on the FreeRTOS labs page every so often to see if there are any new developments. I now see:

"Latest: The next FreeRTOS+TCP Labs release will include impressive server implementations for four different MCU and MPU platforms!"

So that leaves me with some questions...

Would the LPC4088 or a close relative be one of these?

How long before the next release, and should I wait before continuing?

Will it be closely integrated with the new 8.2.0 release of FreeRTOS? (I notice that the flavour of 8.1.2 downloaded with the TCP examples is slightly different to that in the main release.)

It would be good to see some examples of the NetworkInterface.c functions that deal more directly with hardware than the simulator versions.

I have the basic initialisation in place and I am now working on the cable-detect/link bring-up. I'm not clear what should be done if the link goes down. Do I tell the stack and will it re-attempt the initialisation thus calling the original init/bring-up code?

Ultimately, I want to integrate the VNC server of the Segger 'emWin' diaplay manager as well as an http and an ftp interface for monitoring and file up/download.

Regards,

Andy McC


Porting FreeRTOS+TCP to NXP LPC4088 ARM CortexM4F based microcontroller

Posted by rtel on January 9, 2015

We have a driver for the LPC18xx, which I believe uses the same MAC IP as the LPC4088, so should work for you. This is being tested with, and indeed uses features introduced in, FreeRTOS V8.2.0.

The projects are not published yet as they include some other as yet unreleased components, however I can provide the NetworkInterface files for you.

There are two versions, a 'basic' version which works with the existing FreeRTOS+TCP Labs release, and a version which has been improved, but requires the FreeRTOS+TCP head revision code (rather than the latest Labs release).

Both versions interface with the LPCOpen drivers. Are you using LPCOpen?

Regards.


Porting FreeRTOS+TCP to NXP LPC4088 ARM CortexM4F based microcontroller

Posted by andymcc0 on January 9, 2015

"We have a driver for the LPC18xx, which I believe uses the same MAC IP as the LPC4088"

I believe so too.

"Are you using LPCOpen?"

Yes I am.

"I can provide the NetworkInterface files for you"

That would be great. Right now I think that the 'basic' version which works with the existing FreeRTOS+TCP Labs release would be best, and I will wait for the 'improved' version to come through with the next release.

Cheers,

Andy McC


Porting FreeRTOS+TCP to NXP LPC4088 ARM CortexM4F based microcontroller

Posted by rtel on January 9, 2015

Andy - if you like we could work with you as an 'early adopter', in which case we can personally help and support you to get up and running with the latest drivers and the latest FreeRTOS+TCP code. If that is of interest please write to me using the 'business contact' link on the following URL: http://www.freertos.org/contact

Regards.


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