Peter Drescher / TextLCD

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Revision 4:a7c74d4c6911, committed 2010-12-14

Comitter:
dreschpe
Date:
Tue Dec 14 16:47:47 2010 +0000
Parent:
3:8582013914a0
Commit message:
0.2 change small delays to __nop();

Changed in this revision

TextLCD.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/TextLCD.cpp	Mon Dec 06 00:07:57 2010 +0000
+++ b/TextLCD.cpp	Tue Dec 14 16:47:47 2010 +0000
@@ -36,16 +36,16 @@
     // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
     for (int i=0; i<3; i++) {
         _e = 1;
-        wait(0.000001f);
+        __nop();
         _d = 0x3;
-        wait(0.000001f); 
+        __nop();
         _e = 0;
         wait(0.004f); // 4ms
        }
     _e = 1;
-    wait(0.000001f);
+    __nop();
     _d = 0x2;           // 4 Bit mode
-    wait(0.000001f); 
+    __nop(); 
     _e = 0;
     
     writeCommand(0x28); // Function set 4 Bit, 2Line, 5*7
@@ -102,15 +102,15 @@
 
 void TextLCD::writeByte(int value) {
     _e = 1;
-    wait(0.000001f);    
+    __nop();    
     _d = value >> 4;
-    wait(0.000001f);
+    __nop();
     _e = 0;
-    wait(0.000001f);
+    __nop();
     _e = 1;
-    wait(0.000001f);
+    __nop();
     _d = value >> 0;
-    wait(0.000001f);
+    __nop();
     _e = 0;
 }
 
@@ -125,15 +125,15 @@
     waitBusy();
     _rw = 1;
     _rs = 1;
-     wait(0.000001f);
+    __nop();
     _d.input();  // switch Data port to input
     _e = 1;
-    wait(0.000001f);
+    __nop();
     input = _d.read() << 4; // high nibble
     _e = 0;
-     wait(0.000001f);
+    __nop();
     _e = 1;
-    wait(0.000001f);
+    __nop();
     input = input | _d.read(); // low nibble
     _e = 0;   
     return (input);
@@ -143,16 +143,16 @@
     int input;
     _rw = 1;
     _rs = 0;
-    wait(0.000001f);
+    __nop();
     _d.input();      // switch Data port to input
     do{ 
         _e = 1;
-        wait(0.000001f);
+        __nop();
         input = _d.read();              
         _e = 0;
-        wait(0.000001f);
+        __nop();
         _e = 1;
-        wait(0.000001f);  
+        __nop();
         _e = 0;
        }while((0x8 & input) == 0x8);  // wait until display is ready
     _rw = 0;