module ChipGPIO

# File lib/chip-gpio/Pin.rb, line 194
def self.get_pins
    cis = [132, 133, 134, 135, 136, 137, 138, 139 ]
    xio = []

    xio_base = get_xio_base()
    (0..7).each { |i| xio << (xio_base + i) }
    
    pins = {}

    cis.each_with_index { |gpio, index| sym = "CSI#{index}".to_sym; pins[sym] = Pin::Pin.new(gpio, sym) }
    xio.each_with_index { |gpio, index| sym = "XIO#{index}".to_sym; pins[sym] = Pin::Pin.new(gpio, sym) }

    return pins
end

# File lib/chip-gpio/Pin.rb, line 179
def self.get_xio_base
  labels = Dir::glob("/sys/class/gpio/*/label")
  labels.each do |label|
    value = File.read(label).strip
    if value == "pcf8574a"
      base_path = File.dirname(label)
      base_path = File.join(base_path, 'base')
      base = File.read(base_path).strip
      return base.to_i
    end
  end

  throw "Could not find XIO base"
end