Rune Langoy / LCDLib

A TextLCD interface for driving 4-bit 16x2 KS0066U LCD

Dependents:   KS0066U4_16x2 LAB05_Oppgave4 LAB05_Oppgave2 LAB05_Oppgave3 ... more

Import program
KS0066U4_16x2 - main.cpp

00001  #include "mbed.h"
00002  #include "TextLCD.h"
00003  
00004  TextLCD lcd(D11,D10,D9,D5,D4,D3,D2);
00005  int main()
00006  {    
00007     lcd.gotoxy(1,1);
00008     lcd.printf("Hello");
00009  
00010     lcd.gotoxy(4,2);
00011     lcd.printf("World");
00012     
00013     while(1) {
00014         wait_ms(300);
00015     }
00016  }

Import library
LCDLib - TextLCD Class Reference

Public Member Functions

TextLCD (PinName rs, PinName rw, PinName e, PinName d4, PinName d5, PinName d6, PinName d7, const char *name=NULL)
Create a TextLCD interface and initiated 16x2 char mode.
void lcdComand (unsigned char cmd)
Writes a Command to the LCD-module.
void lcdData (unsigned char data)
Writes charecters to the LCD display.
void gotoxy (int, int)
moves text cursor to a screen column and row
int putc (int c)
Write a character to the LCD.
int printf (const char *format,...)
Write a formatted string to the LCD.

Protected Member Functions

void writeLcdBitD4toD7 (char data)
Writes the low nible of data to the LCD-module.
void pulseEn ()
Causes the LCD-module to read the data on the data input pins EN = 1 for L-to-H / EN = 0 for H-to-L.
void init_4BitMode2LinesDisplayOn ()
Enable 4 bit mode From KS0066U Documentation.

/media/uploads/rlanghbv/lcdmoduletop.jpg /media/uploads/rlanghbv/lcdmodulebottom.jpg

Diff: TextLCD.cpp

Revision:
16:ca413e232eaa
Parent:
15:dc4f024fd1aa
Child:
17:5ffb16966db2
--- a/TextLCD.cpp	Sun Sep 20 17:15:01 2015 +0000
+++ b/TextLCD.cpp	Mon Sep 21 09:25:53 2015 +0000
@@ -56,10 +56,13 @@
 //Enable 4 bit mode  From KS0066U Documentation
 void TextLCD::init_4BitMode2LinesDisplayOn()
 {
+
     //Start by selecting configuration mode
     CLEAR_RS();
     CLEAR_RW();
 
+    wait(.015);        // Wait 150ms to ensure powered up
+
     // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
     writeLcdBitD4toD7(0x3);
     pulseEn();
@@ -72,16 +75,23 @@
     wait_ms(2);
 
     //Enable 4 bit mode  From KS0066U Documentation
-    writeLcdBitD4toD7(0x2);//(0b0010);   // Select 4- bit start
-    pulseEn();	//LCD exec function
+    writeLcdBitD4toD7(0x2);// (0b0010)  4- bit start / 4-bit mode
     wait_us(100);
-
+    writeLcdBitD4toD7(0x2);
+    pulseEn();
+    wait_us(100);
     writeLcdBitD4toD7(0x2);////(0b0010);   // Select 4- bit start  (Already on the out port no need to write once more )
     pulseEn();	//LCD exec function
-    wait_us(100);
+    wait_us(50);
 
     writeLcdBitD4toD7(0xC);//(0b1100);   // 2 Lines + Disp On
     pulseEn();	//LCD exec function
+
+    lcdComand(0x01);  // Clear Display
+    wait_ms(3);
+    lcdComand(0x28);  // Function set 001 BW N F - -    
+    lcdComand(0x06);  // Cursor Direction and Display Shift : 0000 01 CD S (CD 0-left, 1-right S(hift) 0-no, 1-yes    
+    lcdComand(0x0C);  // Dispon + Hide cursor
     wait_us(100);
 }