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RPi_GPIO_i2c_LCD/i2c_HD44780.py

@@ -25,6 +25,8 @@ def write_block_data(self, cmd, data):
 class lcd:
     def __init__(self,address):
         self.lcd = i2c(address)
+        ##Backlight Status
+        self.bl = 0x08
         self.write(0x03)
         self.write(0x02)
         self.write(0x20 | 0x08 | 0x00 | 0x00)
@@ -34,13 +36,13 @@ def __init__(self,address):
         sleep(0.2)
 
     def strobe(self, data):
-        self.lcd.write_cmd(data | 0b00000100 | 0x08)
+        self.lcd.write_cmd(data | 0b00000100 | self.bl)
         sleep(.0005)
-        self.lcd.write_cmd(((data & ~0b00000100) | 0x08))
+        self.lcd.write_cmd(((data & ~0b00000100) | self.bl))
         sleep(.0001)
 
     def write_four_bits(self, data):
-        self.lcd.write_cmd(data | 0x08)
+        self.lcd.write_cmd(data | self.bl)
         self.strobe(data)
 
     def write(self, cmd, mode=0):
@@ -49,9 +51,9 @@ def write(self, cmd, mode=0):
 
     def backlight(self, state):
         if state.lower() == "on":
-            self.lcd.write_cmd(0x08)
+            self.bl=0x08
         elif state.lower() == "off":
-            self.lcd.write_cmd(0x00)
+            self.bl=0x00
 
     def display_string(self, string, line):
         line_cmd = [0x00,0x80,0xC0,0x94,0xD4]
@@ -60,7 +62,10 @@ def display_string(self, string, line):
             self.write(ord(char), 0b00000001)
 
     def clear(self):
-        self.write(0x01)
+        self.write(0x03)
         self.write(0x02)
-
+        self.write(0x20 | 0x08 | 0x00 | 0x00)
+        self.write(0x08 | 0x04)
+        self.write(0x01)
+        self.write(0x04 | 0x02)