Purpose: Pin capability flags and alternate-function identifiers.

Namespace: atmega328p::pin

Capability describes the kinds of functions a pin supports: GPIO, PCINT, ADC, PWM, external interrupts, communication, timer, clock, and analog functions.

Per-pin capability values are in pin::capabilities.

#include <atmega328p/PinFunctions.h>
#include <atmega328p/PWM.h>
#include <atmega328p/ExternalInterrupts.h>
 
namespace mcu = atmega328p;
 
constexpr mcu::pwm::OutputPin pwm_pin = mcu::pwm::OutputPin::OC0A;
constexpr mcu::external_interrupts::LinePin interrupt_pin =
    mcu::external_interrupts::LinePin::INT0;
 
static_assert(mcu::pin::capabilities::PD6 != 0, "PD6 has alternate functions");
static_assert(mcu::pin::capabilities::PD2 != 0, "PD2 has alternate functions");

PC6 is RESET by default. Its GPIO capability depends on the RSTDISBL fuse. ADC6 and ADC7 are analog-only inputs in the 32-terminal packages.