pwm-write
xod/gpio/pwm-write
Outputs hardware-supported PWM signal on a board port.
Possible errors:
— Invalid port
pwm-write
@/pwm-write
Outputs hardware-supported PWM signal on a board port.
Possible errors:
— Invalid port
PORTport
Board port to write to. If the port supports hardware PWM it will be used. If not, it will be set high for values greater than 0.5 and set low otherwise.
DUTYnumber
Duty cycle value in range 0.0 … 1.0
UPDpulse
Triggers new write
DONEpulse
Fires on writing complete
Previously known as xod/core/pwm-output.
C++ implementation
#pragma XOD evaluate_on_pin disable
#pragma XOD evaluate_on_pin enable input_UPD
#ifdef ESP32
#include <analogWrite.h>
#endif
node {
#ifdef PWMRANGE
static constexpr Number pwmRange = PWMRANGE;
#else
static constexpr Number pwmRange = 255.0;
#endif
void evaluate(Context ctx) {
static_assert(isValidDigitalPort(constant_input_PORT), "must be a valid digital port");
if (!isInputDirty<input_UPD>(ctx))
return;
auto duty = getValue<input_DUTY>(ctx);
duty = duty > 1 ? 1 : (duty < 0 ? 0 : duty);
int val = (int)(duty * pwmRange);
pinMode(constant_input_PORT, OUTPUT);
analogWrite(constant_input_PORT, val);
emitValue<output_DONE>(ctx, 1);
}
}