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

TextLCD_UDC.h

Committer:
wim
Date:
2015-11-06
Revision:
41:111ca62e8a59
Parent:
39:e9c2319de9c5

File content as of revision 41:111ca62e8a59:

/* mbed TextLCD Library, for LCDs based on HD44780 controllers
 * Copyright (c) 2014, WH
 *               2014, v01: WH, Extracted from TextLCD.h as of v14
 *               2015, v02: WH, Added some UDC definitions and commented out several UDCs
 *               2015, v03: WH, Added some UDC definitions 
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#ifndef MBED_TEXTLCDUDC_H
#define MBED_TEXTLCDUDC_H

#include "TextLCD_Config.h"

/** Some sample User Defined Chars 5x7 dots */
#if(LCD_UDC == 1)
//extern const char udc_ae[];      //æ
//extern const char udc_0e[];      //ø
//extern const char udc_ao[];      //å
//extern const char udc_AE[];      //Æ
//extern const char udc_0E[];      //Ø
//extern const char udc_Ao[];      //Å
//extern const char udc_PO[];      //Padlock Open
//extern const char udc_PC[];      //Padlock Closed

//extern const char udc_alpha[];  //alpha
//extern const char udc_ohm[];    //ohm
//extern const char udc_sigma[];  //sigma
//extern const char udc_pi[];     //pi
//extern const char udc_root[];   //root

extern const char udc_0[];       // |>
extern const char udc_1[];       // <|
extern const char udc_2[];       // |
extern const char udc_3[];       // ||
extern const char udc_4[];       // |||
extern const char udc_5[];       // =
extern const char udc_6[];       // checkerboard
extern const char udc_7[];       // \

//extern const char udc_degr[];    // Degree symbol

//extern const char udc_TM_T[];    // Trademark T
//extern const char udc_TM_M[];    // Trademark M

//extern const char udc_Bat_Hi[];  // Battery Full
//extern const char udc_Bat_Ha[];  // Battery Half
//extern const char udc_Bat_Lo[];  // Battery Low
extern const char udc_Bat_Hi[];  // Battery Full
extern const char udc_Bat_Ha[];  // Battery Half
extern const char udc_Bat_Lo[];  // Battery Low
extern const char udc_AC[];      // AC Power

extern const char udc_smiley[];  // Smiley
//extern const char udc_droopy[];   // Droopey
//extern const char udc_note[];     // Note
//extern const char udc_note_off[]; // Note Off

//extern const char udc_bar_1[];   // Bar 1
//extern const char udc_bar_2[];   // Bar 11
//extern const char udc_bar_3[];   // Bar 111
//extern const char udc_bar_4[];   // Bar 1111
//extern const char udc_bar_5[];   // Bar 11111

//extern const char udc_ch_1[];    // Hor bars 4
//extern const char udc_ch_2[];    // Hor bars 4 (inverted)
//extern const char udc_ch_3[];    // Ver bars 3
//extern const char udc_ch_4[];    // Ver bars 3 (inverted)
//extern const char udc_ch_yr[];   // Year   (kana)
//extern const char udc_ch_mo[];   // Month  (kana)
//extern const char udc_ch_dy[];   // Day    (kana)
//extern const char udc_ch_mi[];   // minute (kana)

//extern const char udc_bell[];
//extern const char udc_note[];
//extern const char udc_clock[];
//extern const char udc_heart[];
//extern const char udc_duck[];
//extern const char udc_check[];
//extern const char udc_cross[];
//extern const char udc_retarrow[];
//extern const char udc_OK[];       // Ok
//extern const char udc_1_2[];      // 1/2
//extern const char udc_Euro[];     // Euro symbol
//extern const char udc_key[];      // Key symbol

//extern const char udc_None[]; 
//extern const char udc_All[];
#endif /* LCD_UDC Examples */

#endif // MBED_TEXTLCDUDC_H