kbutton
koadrobot/devices/kbutton
Device is Button. It has debounce time.
kbutton
@/kbutton
Device is Button. It has debounce time.
PORTport
Board port number the button is connected to.
UPDpulse
Triggers new read
Tsnumber
Debounce time in seconds.
PULLboolean
Hardware connection.
pulldown (true) - High,
pullup (false) - Low (1-duty).
ERRpulse
Fires if update failed. E.g. `PORT` does not exist.
DONEpulse
Fires on reading complete
PRSboolean
Last read value. Equals to `true` while the button is pressed (hold down) and `false` while it is released.
C++ implementation
struct State {
bool state = false;
};
{{ GENERATED_CODE }}
void evaluate(Context ctx) {
if (!isInputDirty<input_UPD>(ctx))
return;
const uint8_t port = getValue<input_PORT>(ctx);
if (!isValidDigitalPort(port)) {
emitValue<output_ERR>(ctx, 1);
return;
}
::pinMode(port, INPUT);
bool x = (::digitalRead(port));
State* state = getState(ctx);
if (x != state->state) {
state->state = x;
TimeMs dt = getValue<input_Ts>(ctx) * 1000;
setTimeout(ctx, dt);
}
if (isTimedOut(ctx)) {
if (getValue<input_PULL>(ctx))
emitValue<output_PRS>(ctx, x);
else
emitValue<output_PRS>(ctx, !x);
emitValue<output_DONE>(ctx, 1);
}
}