pw_digital_io_rp2040#

pw_digital_io_rp2040 implements the pw_digital_io interface using the Raspberry Pi Pico SDK.

Setup#

Use of this module requires setting up the Pico SDK for use with Pigweed. Follow the steps in Raspberry Pi RP2040 to get setup.

Examples#

Use pw::digital_io::Rp2040DigitalIn and pw::digital_io::Rp2040DigitalInOut classes to control GPIO pins.

Example code to use GPIO pins:

#include "pw_digital_io/polarity.h"
#include "pw_digital_io_rp2040/digital_io.h"

using pw::digital_io::Polarity;
using pw::digital_io::Rp2040Config;
using pw::digital_io::Rp2040DigitalIn;
using pw::digital_io::Rp2040DigitalInOut;
using pw::digital_io::State;

constexpr Rp2040Config output_pin_config{
    .pin = 15,
    .polarity = Polarity::kActiveLow,
};
constexpr Rp2040Config input_pin_config{
    .pin = 16,
    .polarity = Polarity::kActiveHigh,
};

// Config output pin:
Rp2040DigitalInOut out(output_pin_config);
out.Enable();

// Set the output pin active.
// This pulls pin to ground since the polarity is kActiveLow.
out.SetState(State::kActive);

// Config input pin:
Rp2040DigitalIn in(input_pin_config);
in.Enable();

// Get the pin state. Since the polarity is kActiveHigh this will return
// State::kActive if the pin is high or and State::kInactive if the pin is
// low (grounded).
State pin_state = in.GetState();