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_Config.h

Revision:
40:d3496c3ea301
Parent:
39:e9c2319de9c5
Child:
41:111ca62e8a59
--- a/TextLCD_Config.h	Tue May 19 18:13:00 2015 +0000
+++ b/TextLCD_Config.h	Wed May 20 18:46:51 2015 +0000
@@ -46,27 +46,27 @@
 #define LCD_PRINTF     1           /* Enable Stream implementation */
 #define LCD_ICON       1           /* Enable Icon implementation -2.0K codesize*/
 #define LCD_ORIENT     1           /* Enable Orientation switch implementation -0.9K codesize*/
-#define LCD_BIGFONT    0           /* Enable Big Font implementation -0.6K codesize */
-#define LCD_INVERT     0           /* Enable display Invert implementation -0.5K codesize*/
-#define LCD_POWER      0           /* Enable Power control implementation -0.1K codesize*/
+#define LCD_BIGFONT    1           /* Enable Big Font implementation -0.6K codesize */
+#define LCD_INVERT     1           /* Enable display Invert implementation -0.5K codesize*/
+#define LCD_POWER      1           /* Enable Power control implementation -0.1K codesize*/
 #define LCD_BLINK      1           /* Enable UDC and Icon Blink control implementation -0.8K codesize*/
 
-//Select option to activate default fonttable or alternatively use conversion for specific controller versions (eg PCF2119C, PCF2119R)
-#define LCD_DEFAULT_FONT 0
+//Select option to activate default fonttable or alternatively use conversion for specific controller versions (eg PCF2116C, PCF2119R)
+#define LCD_DEF_FONT   1
 
 //Pin Defines for I2C PCF8574/PCF8574A or MCP23008 and SPI 74595 bus expander interfaces
 //Different commercially available LCD portexpanders use different wiring conventions.
 //LCD and serial portexpanders should be wired according to the tables below.
 //
 //Select Serial Port Expander Hardware module (one option only)
-#define DEFAULT        0
+#define DEFAULT        1
 #define ADAFRUIT       0
 #define DFROBOT        0
 #define LCM1602        0
 #define YWROBOT        0
 #define GYLCD          0
 #define MJKDZ          0
-#define SYDZ           1
+#define SYDZ           0
 #define WIDEHK         0
 #define LCDPLUG        0