On Sun, 10 Mar 2019 at 03:46, John Dammeyer <[email protected]> wrote:
> But I don't think LinuxCNC nor MachineKit compiles this into C code. So how > is this indirection used? Each component reads its inputs and computes its outputs every thread cycle (servo or base, depending on which one it is addf-ed to) The HAL pins are actually pointers to locations in shared memory. So, a component reads the memory locations that are its inputs and writes to the locations that are outputs. Those locations might, or might not, be the same memory location as the input to another component. There is no logic in HAL. It runs once to connect inputs to outputs. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1916 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
