Digital Pins¶

Céu-Arduino supports emit and await statements for digital pins in output and input modes, respectively.

Input Pins¶

A program can await a change in a digital pin configured as input and acquire its current value:

input int PIN_02;
var int v = await PIN_02;

In the interrupt mode, the pin requires a driver to generate the input:

#include "arduino/isr/pin-02.ceu"
input int PIN_02;
var int v = await PIN_02;

Output Pins¶

A program can emit a change to a digital pin configured as output.

Digital Output¶

For digital output, the pin number requires the prefix PIN_:

output int PIN_13;
emit PIN_13(HIGH);

PWM Output¶

For PWM output, the pin number requires the prefix PWM_:

output u8 PWM_13;
emit PWM_13(127);