Wim Huiskamp / Mbed 2 deprecated TextLCD_HelloWorld2

Hello World demo for Enhanced TextLCD lib.

Dependencies:   TextLCD mbed

Dependents:   Opener-6

The Enhanced TextLCD lib supports more display types than the original lib. Added support for User Defined Characters (UDCs), Backlight control and other features such as control through I2C and SPI port expanders and controllers with native I2C and SPI interfaces. See here for more info.

main.cpp

Committer:
wim
Date:
2015-03-29
Revision:
4:a3e4bb2053cb
Parent:
3:f238b4f7874f

File content as of revision 4:a3e4bb2053cb:

/* Hello World! for the TextLCD Enhanced Library*/

#include "mbed.h"
#include "TextLCD.h"
 
// Host PC Communication channels
Serial pc(USBTX, USBRX); // tx, rx
 
// I2C Communication
I2C i2c_lcd(p9,p10); // SDA, SCL
//I2C i2c_lcd(p28,p27); // SDA, SCL
 
// SPI Communication
SPI spi_lcd(p5, NC, p7); // MOSI, MISO, SCLK

// LCD instantiation 
//TextLCD lcd(p15, p16, p17, p18, p19, p20, TextLCD::LCD20x2);        // 4bit bus: rs, e, d4-d7
TextLCD_I2C lcd(&i2c_lcd, 0x40, TextLCD::LCD20x4);                  // I2C exp: I2C bus, PCF8574 Slaveaddress, LCD Type
//TextLCD_I2C lcd(&i2c_lcd, 0x42, TextLCD::LCD16x2, TextLCD::WS0010); // I2C exp: I2C bus, PCF8574 Slaveaddress, LCD Type, Ctrl Type
//TextLCD_I2C lcd(&spi_lcd, p8, TextLCD::LCD24x4D);                   // I2C exp: SPI bus, CS pin, LCD Type
//TextLCD_SPI_N lcd(&spi_lcd, p8, p9, TextLCD::LCD16x2, NC, TextLCD::ST7032_3V3); // SPI native: SPI bus, CS pin, RS pin, LCDType=LCD16x2, BL=NC, LCDTCtrl=ST7032
//TextLCD_I2C_N lcd(&i2c_lcd, ST7032_SA, TextLCD::LCD16x2, NC, TextLCD::ST7032_3V3); // I2C native: I2C bus, slaveaddress, LCDType=LCD16x2, BL=NC, LCDTCtrl=ST7032 =Ok
//TextLCD_I2C_N lcd(&i2c_lcd, SSD1803_SA1, TextLCD::LCD20x4D, NC, TextLCD::SSD1803_3V3); // I2C native: I2C bus, slaveaddress, LCDType=LCD20x4D, BL=NC, LCDTCtrl=SSD1803 =Ok
 
int main() {   
  Timer t;

  pc.printf("TextLCD Enhanced 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('+');       
  }    

// Fill screen again and time it
  t.start();

  for (int row=0; row<lcd.rows(); row++) {
    int col=0;
      
    lcd.putc('0' + row);      
      
    for (col=1; col<lcd.columns()-1; col++) {    
      lcd.putc('*');
    }
 
    lcd.putc('+');       
  }    
  t.stop();    
  pc.printf("All my hard work took %f sec\r\n", t.read());          

// 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);    
    
  pc.printf("Bye now\r\n");          
}