gpio.rb in ffi-wiring_pi-0.2.0

- old
+ new

@@ -103,10 +103,48 @@
     else
       raise "Unknown result: #{result.inspect}"
     end
   end
 
+  # @param pin [Integer] pin position (depends on setup mode)
+  # @param value [Integer] 0-1023
+  attach_function :pwm_write, :pwmWrite, [:int, :int], :void
+
+  # This writes the 8-bit byte supplied to the first 8 GPIO pins.
+  # It’s the fastest way to set all 8 bits at once to a particular value,
+  # although it still takes two write operations to the Pi’s GPIO hardware.
+  # @param pin [Integer] pin position (depends on setup mode)
+  # @param value [Integer] 0-1023
+  attach_function :digital_write_byte, :digitalWriteByte, [:int], :void
+
+  def self.batch_write(boolean_array)
+    digital_write_byte boolean_array.each_with_index.sum { |bit, i| (bit ? 1 : 0 ) << i }
+  end
+
+  # The PWM generator can run in 2 modes – :balanced and :mark_space
+  # The :mark_space mode is traditional, however the default mode in the Pi is :balanced.
+  # @param value [Integer] PWM_MODE_BAL or PWM_MODE_MS
+  attach_function :pwm_set_mode, :pwmSetMode, [:int], :void
+
+  def self.pwm_mode(mode = :balanced)
+    raise ArgumentError("mode is invalid: #{mode.inspect}") unless mode.in?([:balanced, :mark_space])
+    pwm_set_mode mode == :balanced ? PWM_MODE_BAL : PWM_MODE_MS
+  end
+
+  # This sets the range register in the PWM generator. The default is 1024.
+  # @param value [Integer]
+  attach_function :pwm_set_range, :pwmSetRange, [:uint], :void
+
+  def self.pwm_range(range = 1024)
+    raise ArgumentError("range is invalid: #{range.inspect}") unless range.is_a?(Integer) && range >= 0
+    pwm_set_range range
+  end
+
+  # This sets the divisor for the PWM clock.
+  # @param value [Integer]
+  attach_function :pwm_set_clock, :pwmSetClock, [:int], :void
+
   class Pin
     def initialize(position, mode)
       @position = position
       @mode = mode
     end
@@ -117,8 +155,13 @@
     end
 
     def down!
       raise ArgumentError('Can only set in OUTPUT mode') && return unless @mode == FFI::WiringPi::GPIO::OUTPUT
       FFI::WiringPi::GPIO.down(@position)
+    end
+
+    def value
+      raise ArgumentError('Can only set in INPUT mode') && return unless @mode == FFI::WiringPi::GPIO::INPUT
+      FFI::WiringPi::GPIO.read(@position)
     end
   end
 end