Wim Huiskamp / TextLCD

Updated for more display types. Fixed memoryaddress confusion in address() method. Added new getAddress() method. Added support for UDCs, Backlight control and other features such as control through I2C and SPI port expanders and controllers with native I2C and SPI interfaces. Refactored to fix issue with pins that are default declared as NC.

Dependents:   GPSDevice TestTextLCD SD to Flash Data Transfer DrumMachine ... more

Fork of TextLCD by Simon Ford

Example

Hello World! for the TextLCD

#include "mbed.h"
#include "TextLCD.h"
 
// Host PC Communication channels
Serial pc(USBTX, USBRX); // tx, rx
 
// I2C Communication
I2C i2c_lcd(p28,p27); // SDA, SCL
 
// SPI Communication
SPI spi_lcd(p5, NC, p7); // MOSI, MISO, SCLK

//TextLCD lcd(p15, p16, p17, p18, p19, p20);                // RS, E, D4-D7, LCDType=LCD16x2, BL=NC, E2=NC, LCDTCtrl=HD44780
//TextLCD_SPI lcd(&spi_lcd, p8, TextLCD::LCD40x4);   // SPI bus, 74595 expander, CS pin, LCD Type  
TextLCD_I2C lcd(&i2c_lcd, 0x42, TextLCD::LCD20x4);  // I2C bus, PCF8574 Slaveaddress, LCD Type
//TextLCD_I2C lcd(&i2c_lcd, 0x42, TextLCD::LCD16x2, TextLCD::WS0010); // I2C bus, PCF8574 Slaveaddress, LCD Type, Device Type
//TextLCD_SPI_N lcd(&spi_lcd, p8, p9);               // SPI bus, CS pin, RS pin, LCDType=LCD16x2, BL=NC, LCDTCtrl=ST7032_3V3   
//TextLCD_I2C_N lcd(&i2c_lcd, ST7032_SA, TextLCD::LCD16x2, NC, TextLCD::ST7032_3V3); // I2C bus, Slaveaddress, LCD Type, BL=NC, LCDTCtrl=ST7032_3V3  

int main() {
    pc.printf("LCD Test. Columns=%d, Rows=%d\n\r", lcd.columns(), lcd.rows());
    
    for (int row=0; row<lcd.rows(); row++) {
      int col=0;
      
      pc.printf("MemAddr(Col=%d, Row=%d)=0x%02X\n\r", col, row, lcd.getAddress(col, row));      
//      lcd.putc('-');
      lcd.putc('0' + row);      
      
      for (col=1; col<lcd.columns()-1; col++) {    
        lcd.putc('*');
      }
 
      pc.printf("MemAddr(Col=%d, Row=%d)=0x%02X\n\r", col, row, lcd.getAddress(col, row));      
      lcd.putc('+');
        
    }    
    
// Show cursor as blinking character
    lcd.setCursor(TextLCD::CurOff_BlkOn);
 
// Set and show user defined characters. A maximum of 8 UDCs are supported by the HD44780.
// They are defined by a 5x7 bitpattern. 
    lcd.setUDC(0, (char *) udc_0);  // Show |>
    lcd.putc(0);    
    lcd.setUDC(1, (char *) udc_1);  // Show <|
    lcd.putc(1);    

}

Handbook page

More info is here

Diff: TextLCD.h

Revision:
31:ef31cd8a00d1
Parent:
30:033048611c01
Child:
32:59c4b8f648d4
--- a/TextLCD.h	Sat Jun 28 14:27:32 2014 +0000
+++ b/TextLCD.h	Sun Jun 29 14:55:50 2014 +0000
@@ -70,8 +70,8 @@
 //LCD and serial portexpanders should be wired accordingly 
 //
 //Select Hardware module (one option only)
-#define DEFAULT        0
-#define ADAFRUIT       1
+#define DEFAULT        1
+#define ADAFRUIT       0
 #define DFROBOT        0
 
 #if (DEFAULT==1)
@@ -347,38 +347,6 @@
     };
 
 
-#if(0)
-    /** LCD panel format */
-    enum LCDType {
-        LCD8x1,     /**<  8x1 LCD panel */    
-        LCD8x2,     /**<  8x2 LCD panel */          
-        LCD8x2B,    /**<  8x2 LCD panel (actually 16x1) */                  
-//        LCD12x1,    /**< 12x1 LCD panel */                          
-//        LCD12x1B,   /**< 12x1 LCD panel, special mode PCF21XX */                                  
-        LCD12x2,    /**< 12x2 LCD panel */                          
-        LCD12x3B,   /**< 12x3 LCD panel, special mode PCF21XX */                                  
-//        LCD12x3C,   /**< 12x3 LCD panel, special mode PCF21XX */                                          
-        LCD12x4,    /**< 12x4 LCD panel */                  
-        LCD12x4B,   /**< 12x4 LCD panel, special mode PCF21XX */                                          
-        LCD16x1,    /**< 16x1 LCD panel (actually 8x2) */          
-//        LCD16x1B,   /**< 16x1 LCD panel */                  
-        LCD16x2,    /**< 16x2 LCD panel (default) */
-        LCD16x2B,   /**< 16x2 LCD panel alternate addressing */
-//        LCD16x3B,   /**< 16x3 LCD panel, special mode ST7036 */                
-        LCD16x4,    /**< 16x4 LCD panel */        
-//        LCD20x1,    /**< 20x1 LCD panel */
-        LCD20x2,    /**< 20x2 LCD panel */
-        LCD20x4,    /**< 20x4 LCD panel */
-        LCD24x4B,   /**< 24x4 LCD panel, special mode KS0078 */                                                  
-        LCD24x1,    /**< 24x1 LCD panel */        
-        LCD24x2,    /**< 24x2 LCD panel */        
-//        LCD40x1,    /**< 40x1 LCD panel */                        
-        LCD40x2,    /**< 40x2 LCD panel */                
-        LCD40x4     /**< 40x4 LCD panel, Two controller version */                        
-    };
-#endif
-
-
     /** LCD Controller Device */
     enum LCDCtrl {
         HD44780     = 0,                                             /**<  HD44780 (default)                            */    
@@ -394,20 +362,6 @@
     };
 
 
-#if(0)
-    /** LCD Controller Device */
-    enum LCDCtrl {
-        HD44780,     /**<  HD44780 (default)                           */    
-        WS0010,      /**<  WS0010  OLED Controller, 4/8 bit, SPI       */    
-        ST7036,      /**<  ST7036  3V3 with Booster, 4/8 bit, SPI      */   
-        ST7032_3V3,  /**<  ST7032  3V3 with Booster, 4/8 bit, SPI, I2C */   
-        ST7032_5V,   /**<  ST7032  5V no Booster, 4/8 bit, SPI, I2C    */           
-        KS0078,      /**<  KS0078  24x4 support, 4/8 bit               */                   
-        PCF21XX_3V3, /**<  PCF21XX 3V3 with Booster, 4/8 bit, I2C      */                           
-//        PCF21XX_5V   /**<  PCF21XX 5V no Booster, 4/8 bit, I2C         */        
-    };
-#endif
-
     /** LCD Cursor control */
     enum LCDCursor {
         CurOff_BlkOff = 0x00,  /**<  Cursor Off, Blinking Char Off */