Diff: I2CTextLCD.cpp

Revision:

7:dd2dcba75885

Parent:

6:bc76b6a20bfb

Child:

8:4816fdd57607

--- a/I2CTextLCD.cpp	Wed Nov 23 08:17:39 2011 +0000
+++ b/I2CTextLCD.cpp	Wed Nov 23 11:39:39 2011 +0000
@@ -45,24 +45,31 @@
     _backlight=backlight;
     //_i2c.frequency(70000);
  // Winstar 20x4 WH2004-NYG- needs 40ms after VDD> 4,5V
-     wait(0.5);
-// send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
-for (int i=0; i<3; i++) {
-//     writeCommand(0x3); //send 3 times mode
-      wait(0.00164);      // this command takes 1.64ms, so wait for it
-    }
+    /*
+    wait(0.5);
+    writeCommand(0x2); // 4-bit mode
+    wait(0.05);
+    writeCommand(0x28);    // Function set 001 BW N F - -
+    wait(0.05);
+    */
+    //RC:2011-11-23: Newhaven 20x4 OLED data sheet method
     writeCommand(0x2); // 4-bit mode
     wait(0.05);
-//    writeCommand(0x2); // 4-bit mode
-
-    writeCommand(0x28);    // Function set 001 BW N F - -
+    writeCommand(0x2); // 4-bit mode
     wait(0.05);
-//    writeCommand(0x28);    // Function set 001 BW N F
+    writeCommand(0x28); // display OFF, "Function Set". Newhaven say 0x08, but this loses 2 rows!
+    wait(0.05); 
+    writeCommand(0x1); // display clear
     wait(0.05);
+    writeCommand(0x6); // entry mode set
+    wait(0.05); 
+    writeCommand(0x2); // 4-bit mode
+    wait(0.05);                  
     writeCommand(0x0C); // ON-OFF ctrl: turns display ON, no cursor. Use 0x0E for cursor ON.
     /* 0x28 also works for Winstar WEH002004ALPP5N00000 OLED display. 0x29= westEuro fon table, 0x2A = UK/Russian
 */
     // Added RC 2011-8-11
+    /*
     writeCommand(0x05); // clear display RAM all to 00
     wait(0.05);        // 6.2ms specified for OLED display to recover from RAM clear
     
@@ -75,7 +82,7 @@
     wait(0.05);
     writeCommand (0x01);  //clear entire display.
     wait(0.07);
-
+*/
 
 }