Raspberry Pi 4 Model B (ARM 64) + Swift 5.3 で Lチカ

led-flashing.swift

import Foundation
import SwiftyGPIO

print("Hello, happy world!")

let gpios = SwiftyGPIO.GPIOs(for: .RaspberryPi4)

let port_white = gpios[.P24]!
let port_red = gpios[.P22]!
let port_yellow = gpios[.P23]!
let port_green = gpios[.P27]!

let ports = [
    port_white,
    port_yellow,
    port_red,
    port_green,
]

for port in ports {
    port.direction = .OUT
}

while true {
    ports.forEach {
        $0.value = 1
    }
    usleep(500000)
    ports.forEach {
        $0.value = 0
    }
    usleep(500000)
}