Expanded functions for display

47ffc162 · Paolo Baesso · b1c71ceb · 47ffc162
Commit 47ffc162 authored May 25, 2018 by Paolo Baesso
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I2CDISP.py packages/I2CDISP.py +50 -1

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--- a/packages/I2CDISP.py
+++ b/packages/I2CDISP.py
@@ -2,6 +2,7 @@
 import uhal
 from I2CuHal2 import I2CCore
 import StringIO
+import time

 class CFA632:
    #Class to configure the CFA632 display
@@ -30,10 +31,49 @@ class LCD09052:
        self.slaveaddr = slaveaddr

    def test(self):
-        print "Testing the display"
+        print "\tTesting display (LCD09052)"
+        self.clear()
+        self.setBrightness(0)
+        time.sleep(0.2)
+        self.setBrightness(250)
+        time.sleep(0.2)
+        self.setBrightness(0)
+        time.sleep(0.2)
+        self.setBrightness(250)
+        for ipos in range(1, 18):
+            self.writeChar(33)
+            self.posCursor(1, ipos-1)
+            time.sleep(0.1)
+            self.writeChar(254)
+        self.posCursor(2, 1)
+        for ipos in range(1, 18):
+            self.writeChar(33)
+            self.posCursor(2, ipos-1)
+            time.sleep(0.1)
+            self.writeChar(254)
        return
        
+    def clear(self):
+    ### Clears the display and locates the curson on position (1,1), i.e. top left
+        i2ccmd= [4]
+        mystop= True
+        self.i2c.write( self.slaveaddr, i2ccmd, mystop)
+        
+    def posCursor(self, line, pos):
+    ### Position the cursor on a specific location
+    ##  line can be 1 (top) or 2 (bottom)
+    ##  pos can be [1, 16}
+        if ((line==1) or (line==2) and (1 <= pos <= 16)):
+            i2ccmd= [2, line, pos]
+            mystop= True
+            self.i2c.write( self.slaveaddr, i2ccmd, mystop)
+        else:
+            print "Cursor line can only be 1 or 2, position must be in range [1, 16]"
+    
+    
    def setBrightness(self, value= 250):
+    ### Sets the brightness level of the backlight.
+    ##  Value is an integer in range [0, 250]. 0= no light, 250= maximum light.
        if value < 0:
            print "setBrightness: minimum value= 0. Coherced to 0"
            value = 0
@@ -43,6 +83,15 @@ class LCD09052:
        i2ccmd= [7, value]
        mystop= True
        self.i2c.write( self.slaveaddr, i2ccmd, mystop)
+        
+    
+    def writeChar(self, value):
+    ### Writes a char in the current cursor position
+    ##  The curso is then shifted right one position
+    ##  value must be an integer corresponding to the ascii code of the character
+        i2ccmd= [1, value]
+        mystop= True
+        self.i2c.write( self.slaveaddr, i2ccmd, mystop)
    
    def writeSomething(self, i2ccmd):
        mystop= True