Dan East / TextLCD

TextLCD library for controlling various LCD panels based on the HD44780 4-bit interface. Includes support for custom character bitmaps.

Dependents:   HD44780-LCD_with_Bluetooth

Fork of TextLCD by Simon Ford

Examples

Hello world in custom font

#include "mbed.h"
#include "TextLCD.h"

int main() {
    lcd=new TextLCD(D8, D9, D4, D5, D6, D7);


    char c_H[]={0x1b,0x1b,0x1b,0x1f,0x1b,0x1b,0x1b,0x1b};
    char c_e[]={0x0,0x0,0xe,0x1b,0x1f,0x18,0x18,0xf};
    char c_l[]={0x6,0x6,0x6,0x6,0x6,0x6,0x6,0x6};
    char c_o[]={0x0,0x0,0xe,0x1b,0x1b,0x1b,0x1b,0xe};
    char c_W[]={0x1b,0x1b,0x1b,0x1b,0x1f,0x1f,0x1f,0x1b};
    char c_r[]={0x0,0x0,0xe,0x1b,0x18,0x18,0x18,0x18};
    char c_d[]={0x3,0x3,0xf,0x1b,0x1b,0x1b,0x1b,0xf};

    lcd->defineChar(1, c_H);
    lcd->putc(1);
    lcd->defineChar(2, c_e);
    lcd->putc(2);
    lcd->defineChar(3, c_l);
    lcd->putc(3);
    lcd->putc(3);
    lcd->defineChar(4, c_o);
    lcd->putc(4);
    lcd->putc(32);
    lcd->defineChar(5, c_W);
    lcd->putc(5);
    lcd->putc(4);
    lcd->defineChar(6, c_r);
    lcd->putc(6);
    lcd->putc(3);
    lcd->defineChar(7, c_d);
    lcd->putc(7);

    while (1) {
    }
}

Animated busy indicator

This animation only uses 1 of the 8 custom character slots, and can be used like a regular character in the output and will automatically animate in-place. Any number of the animated characters can be displayed on the display at once using this animation technique.

#include "mbed.h"
#include "TextLCD.h"

int main() {
    lcd=new TextLCD(D8, D9, D4, D5, D6, D7);

    //The 7 animation characters
    char spin[]={   0x4,0x4,0x4,0x4,0x4,0x4,0x4,0x0,
                    0x2,0x2,0x2,0x4,0x8,0x8,0x8,0x0,
                    0x1,0x2,0x2,0x4,0x8,0x8,0x10,0x0,
                    0x0,0x0,0x3,0x4,0x18,0x0,0x0,0x0,
                    0x0,0x0,0x0,0x1f,0x0,0x0,0x0,0x0,
                    0x0,0x0,0x18,0x4,0x3,0x0,0x0,0x0,
                    0x10,0x8,0x8,0x4,0x2,0x2,0x01,0x0
                };

    //Output text.
    lcd->printf("\1 Please  wait \1");
    
    //Animation loop
    int frame=0;
    while (1) {
        lcd->defineChar(1, spin+frame*8);
        frame=(frame+1)%(sizeof(spin)/8);
        wait(.14);
    }

Files at this revision

API Documentation at this revision

Revision 5:a53b3e2d6f1e, committed 2010-05-29

Comitter:
simon
Date:
Sat May 29 10:15:04 2010 +0000
Parent:
4:bf5b706f8d32
Child:
6:e4cb7ddee0d3
Commit message:

Changed in this revision

TextLCD.h Show annotated file Show diff for this revision Revisions of this file 
--- a/TextLCD.h	Thu May 27 18:03:45 2010 +0000
+++ b/TextLCD.h	Sat May 29 10:15:04 2010 +0000
@@ -25,16 +25,16 @@
 
 #include "mbed.h"
 
-/** A TextLCD interface for 4-bit HD44780-based LCDs
+/** A TextLCD interface for driving 4-bit HD44780-based LCDs
  *
- * Supports a number of different panel configurations
+ * Currently supports 16x2, 20x2 and 20x4 panels
  *
  * @code
  * #include "mbed.h"
  * #include "TextLCD.h"
- *
- * TextLCD lcd(p5, p6, p7, p8, p9);
- *
+ * 
+ * TextLCD lcd(p10, p12, p15, p16, p29, p30); // rs, e, d0-d3
+ * 
  * int main() {
  *     lcd.printf("Hello World!\n");
  * }