uxInitialiseStackFrame() function

Initialize the task's starting interrupt stack frame This function initializes the task's starting interrupt stack frame. The dispatcher will use this stack frame in a context restore routine. Therefore, the starting stack frame must be initialized as if the task was interrupted right before its first instruction is called. - The stack frame is allocated to a 16-byte aligned address - The THREADPTR register is saved in the extra storage area of the stack frame. This is also initialized