atomthreads

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Library:      Atomthreads ARMv7 Port
Author:       Natie van Rooyen <natie@navaro.nl>
License:      BSD Revised

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ARM ARMv7 PORT

This folder contains a port of the Atomthreads real time kernel for the
ARMv7 processor architecture. This port was only tested on a ARMv7 but 
should work on other versions of the ARM processor as well.

To Use:

1. From your platforms IRQ vector branch to the "__irq_context_handler()". 
   All interrupts from where calls to Atomthreads will be made should do 
   this. The "__irq_context_handler()" will call a platform specific 
   function called "__context_preempt_handler()" to dispatch the interrupt.
    
2. Implement the function "__context_preempt_handler()"  
   from where your platforms interrupt controller will be serviced and the 
   interrupt will be dispatched to a specific  interrupt service routine. In  
   the case of your platforms timer tick interrupt call the "archTickHandler()" 
   implemented in "atomport.c".
   
3. Initialize your platforms timer tick hardware to generate  an OS timer tick 
   interrupt.
   
4. Add code to acknowledge your timer hardware's interrupt in the
   function "archTickHandler()" implemented in "atomport.c". This must
   be done here because "atomIntExit()" might switch the context.

5. After your platforms c-runtime initialization has completed, start 
   Atomthreads from your runtime's "main()" function.
   
6. Include the port's Makefile in your platform build flow.