Module: ChipGPIO

Defined in:
lib/chip-gpio/SoftwareSpi.rb,
lib/chip-gpio.rb,
lib/chip-gpio/Pin.rb,
lib/chip-gpio/HardwareSpi.rb

Overview

*** TODO *** Reads *** Baudrate *** Phase

Defined Under Namespace

Modules: Pin Classes: HardwareSPI, SoftwareSPI

Class Method Summary collapse

Class Method Details

.get_pins ⇒ Object 



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# 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

.get_xio_base ⇒ Object 



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# 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