Added support for FreeRTOS+ Trace, other improvements

[modemo]

• FreeRTOS+ Trace (sources, BSP editor options, integration)
• added simple FreeRTOS Hello World
• support FreeRTOS V7.5.2
• fixed Nios2 port- ignored interrupt context (mluthi)

[modemo]

Hi there,
First of all, let me thank mluthi for finding interrupt related bug in NIOS port. This bug was worrying me few days a caused unstability of my system. Impact of this bug was probably enhanced by Trace utility that I use, so I have to start investigate myself and finally found this issue reported here.

So I decide to contribute and share my improvements too, if somebody interested.
To sum up:

• added support FreeRTOS+ Trace (sources, BSP editor options, integration, Nios2 port) (http://www.freertos.org/FreeRTOS-Plus/FreeRTOS_Plus_Trace/FreeRTOS_Plus_Trace.shtml)
• added simple FreeRTOS Hello World – some kind of template for new project
• support FreeRTOS V7.5.2
• fixed Nios2 port- ignored interrupt context (mluthi)

Please check my friend implementation of vPortSysTickHandler in port.c

Best regards, Laco

[EngineeringSpirit]

I'll do a code review later today and merge your code, Thanks for the contribution!

[EngineeringSpirit]

I have time to merge the code, I'll update to FreeRTOS 8.0 also and thinking about updating LwIP to 1.5 RC the stable will be released soon. We seem to have problems when high TCP load's. Probably have got something to do with the port and context switching, so this I will reimplement en see if I can properly implement the newlib reentrent base stack.

[modemo]

Any updates?

[DipSwitch]

There is a dev branche but I don't know if everything is checked in. The ports works properly. Can checking the last changes In 1 week or so.

[modemo]

Any update on your site DipSwitch, Nick ? We made update to FreeRTOS 8.1.2, Trace 2.6.0 a script modified for Quartus 14.0 (64b). But its not well testeted. I will try to marge with Nick port updates. Fell free to use my fork.