Dan East
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);
}
Revision 7:44f34c09bd37, committed 2010-12-04
- Comitter:
- simon
- Date:
- Sat Dec 04 11:29:57 2010 +0000
- Parent:
- 6:e4cb7ddee0d3
- Child:
- 8:308d188a2d3a
- Commit message:
- Update pin names to d4-d7
Changed in this revision
| TextLCD.cpp | Show annotated file Show diff for this revision Revisions of this file |
| TextLCD.h | Show annotated file Show diff for this revision Revisions of this file |
--- a/TextLCD.cpp Tue Nov 23 14:26:19 2010 +0000
+++ b/TextLCD.cpp Sat Dec 04 11:29:57 2010 +0000
@@ -23,9 +23,9 @@
#include "TextLCD.h"
#include "mbed.h"
-TextLCD::TextLCD(PinName rs, PinName e, PinName d0, PinName d1,
- PinName d2, PinName d3, LCDType type) : _rs(rs),
- _e(e), _d(d0, d1, d2, d3),
+TextLCD::TextLCD(PinName rs, PinName e, PinName d4, PinName d5,
+ PinName d6, PinName d7, LCDType type) : _rs(rs),
+ _e(e), _d(d4, d5, d6, d7),
_type(type) {
_e = 1;
--- a/TextLCD.h Tue Nov 23 14:26:19 2010 +0000
+++ b/TextLCD.h Sat Dec 04 11:29:57 2010 +0000
@@ -33,7 +33,7 @@
* #include "mbed.h"
* #include "TextLCD.h"
*
- * TextLCD lcd(p10, p12, p15, p16, p29, p30); // rs, e, d0-d3
+ * TextLCD lcd(p10, p12, p15, p16, p29, p30); // rs, e, d4-d7
*
* int main() {
* lcd.printf("Hello World!\n");
@@ -55,10 +55,10 @@
*
* @param rs Instruction/data control line
* @param e Enable line (clock)
- * @param d0-d3 Data lines
+ * @param d4-d7 Data lines for using as a 4-bit interface
* @param type Sets the panel size/addressing mode (default = LCD16x2)
*/
- TextLCD(PinName rs, PinName e, PinName d0, PinName d1, PinName d2, PinName d3, LCDType type = LCD16x2);
+ TextLCD(PinName rs, PinName e, PinName d4, PinName d5, PinName d6, PinName d7, LCDType type = LCD16x2);
#if DOXYGEN_ONLY
/** Write a character to the LCD