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:
8:b12188ddd403
Parent:
5:d9eb6ed84a06
Child:
9:9529e943259c
--- a/TextLCD.cpp	Sun Sep 20 14:14:36 2015 +0000
+++ b/TextLCD.cpp	Sun Sep 20 15:55:57 2015 +0000
@@ -12,10 +12,9 @@
 
 
 TextLCD::TextLCD(PinName rs,PinName rw, PinName e, PinName d4, PinName d5,
-                 PinName d6, PinName d7) : LCD_RS(rs),LCD_RW(rw),
-    LCD_EN(e), LCD_D4(d4), LCD_D5(d5), LCD_D6(d6), LCD_D7(d7)
+                 PinName d6, PinName d7) : LCD_RS(rs),LCD_RW(rw), LCD_EN(e),
+    LCD_D4to7(d4,d5,d6,d7)
 {
-
     CLEAR_RW();
     wait_ms(50);  // Wait for disp to turn on
 
@@ -31,16 +30,14 @@
     lcdComand(0x28);//(0b0010 1000);   // 4- bit mode   LCD 2 line 16x2 Matrix
     wait_us(100);
 
-    lcdComand(0xE);//(0b0000 1110);    // Hva gjør vi her ?
+    lcdComand(0xE);//(0b0000 1110);
     wait_us(100);
-    lcdComand(0x01); //(0b00000001); //Hva gjør vi her ?
+    lcdComand(0x01); //(0b00000001);
     wait_us(100);
-    lcdComand(0x06);//(0b00000110);  //Hva gjør vi her ?
+    lcdComand(0x06);//(0b00000110);
     wait_us(100);
-
 }
 
-
 // Causes the LCD-module to read the data on the data input pins
 void TextLCD::pulseEn()
 {
@@ -52,14 +49,7 @@
 //Writes the low lible of data to the LCD-module data pins D4 to D7
 void TextLCD::writeLcdBitD4toD7(char data)
 {
-    if ( ( data >> 3) & 0x01) LCD_D7=1;
-    else  LCD_D7=0;
-    if ( ( data >> 2) & 0x01) LCD_D6=1;
-    else  LCD_D6=0;
-    if ( ( data >> 1) & 0x01) LCD_D5=1;
-    else  LCD_D5=0;
-    if (  data  & 0x01)  LCD_D4=1;
-    else  LCD_D4=0;
+    LCD_D4to7=data;
 }
 
 //Enable 4 bit mode  From KS0066U Documentation