Function logicsim::circuits::register

pub fn register<S: Into<String>>(
    g: &mut GateGraphBuilder, 
    clock: GateIndex, 
    write: GateIndex, 
    read: GateIndex, 
    reset: GateIndex, 
    input: &[GateIndex], 
    name: S
) -> Vec<GateIndex>

Returns the output of a register. The output width will be the same as the provided input.

Inputs

clock Clock input to the register, activated on the raising edge.

write If active during the clock raising edge, the input will be stored in the register.

read If inactive the output will be inactive.

reset Will set the register to zero on the raising edge. This is an async reset.

input Will override the contents of the register if write is active on the clock raising edge.

Example

let input = WordInput::new(&mut g, 4, "input");
let reset = g.lever("reset");
let clock = g.lever("clock");

let register_output = register(
    &mut g,
    clock.bit(),
    ON,  // write
    ON,  // read
    reset.bit(),
    &input.bits(),
    "counter"
);

let output = g.output(&register_output, "result");

let ig = &mut g.init();
ig.pulse_lever_stable(reset);

assert_eq!(output.u8(ig), 0);

input.set_to(ig, 6);
ig.pulse_lever_stable(clock);
assert_eq!(output.u8(ig), 6);

input.set_to(ig, 2);
ig.pulse_lever_stable(clock);
assert_eq!(output.u8(ig), 2);