Merge pull request #3 from jvlobo/master

Changed GPIO library from pi_piper to rpi_gpio

Author: fernandofussuma

Diff for: Gemfile

@@ -1,5 +1,5 @@
 source "https://rubygems.org"
 
-gem "pi_piper"
+gem “rpi_gpio”
 
 gemspec

Diff for: README.md

@@ -18,6 +18,7 @@ require 'charlcd'
 char_lcd = CharLcd.new
 char_lcd.begin(16, 2)
 char_lcd.message("First Line\nSecond Line")
+char_lcd.clean_pins()
 ```
 
 License

Diff for: charlcd.gemspec

@@ -1,6 +1,6 @@
 Gem::Specification.new do |s|
   s.name        = 'charlcd'
-  s.version     = '0.0.1'
+  s.version     = '0.0.2'
   s.date        = '2014-11-25'
   s.summary     = "Lcd display raspberrypi library!"
   s.description = "A lcd display library compatible with the hd44780 controller on the raspberrypi"

Diff for: examples/charlcd_matrix_example.rb

@@ -1,4 +1,4 @@
-require 'charLcd'
+require 'rpi_gpio'
 
 SLEEP_TIME = 0.005
 COLUMNS = 16

Diff for: lib/charlcd.rb

@@ -1,4 +1,4 @@
-require 'pi_piper'
+require 'rpi_gpio'
 
 # code based on:
 # https://github.com/adafruit/Adafruit-Raspberry-Pi-Python-Code/blob/master/Adafruit_CharLCD/Adafruit_CharLCD.py
@@ -43,11 +43,19 @@ class CharLcd
   LCD_5x8DOTS = 0x00
 
   def initialize(pin_rs = 25, pin_e = 24, pins_db = [23, 17, 27, 22])
-    @pin_rs = PiPiper::Pin.new(:pin => pin_rs, :direction => :out)
-    @pin_e = PiPiper::Pin.new(:pin => pin_e, :direction => :out)
+    RPi::GPIO.set_numbering :bcm
+
+    RPi::GPIO.setup pin_rs, :as => :output
+    RPi::GPIO.setup pin_e, :as => :output
+
+    @pin_rs = pin_rs
+    @pin_e = pin_e
     @pins_db = []
 
-    pins_db.each { |pin_db| @pins_db.push(PiPiper::Pin.new(:pin => pin_db, :direction => :out)) }
+    pins_db.each { |pin_db| 
+      @pins_db.push(pin_db) 
+      RPi::GPIO.setup pin_db, :as => :output
+    }
 
     write_4_bits(0x33) # initialization
     write_4_bits(0x32) # initialization
@@ -165,30 +173,37 @@ def write_4_bits(bits, char_mode = false)
 
     bits = bits.to_s(2).rjust(8, "0")
 
-    @pin_rs.update_value(char_mode)
+    if char_mode
+      RPi::GPIO.set_high @pin_rs
+    else
+      RPi::GPIO.set_low @pin_rs
+    end
 
-    @pins_db.each { |pin_db| pin_db.off }
-    (0..3).each { |i| @pins_db.reverse[i].on if bits[i].eql?("1") }
+    @pins_db.each { |pin_db| RPi::GPIO.set_low pin_db }
+    (0..3).each { |i| RPi::GPIO.set_high @pins_db.reverse[i] if bits[i].eql?("1") }
 
     pulse_enable
 
-    @pins_db.each { |pin_db| pin_db.off }
-    (4..7).each { |i| @pins_db.reverse[i - 4].on if bits[i].eql?("1") }
+    @pins_db.each { |pin_db| RPi::GPIO.set_low pin_db }
+    (4..7).each { |i| RPi::GPIO.set_high @pins_db.reverse[i - 4] if bits[i].eql?("1") }
 
     pulse_enable
   end
 
   def pulse_enable
-    @pin_e.off
+    RPi::GPIO.set_low @pin_e
     delay_microseconds(1)
-    @pin_e.on
+    RPi::GPIO.set_high @pin_e
     delay_microseconds(1)
-    @pin_e.off
+    RPi::GPIO.set_low @pin_e
   end
 
   def delay_microseconds(microseconds)
     seconds = microseconds/1_000_000.0
     sleep(seconds)
   end
 
+  def clean_pins
+    RPi::GPIO.clean_up
+  end
 end