Hi, I ask for help for solving a 40x4 lcd problem with the Noiasca library, as below
/*******************************************************************************
LCD 4 bit Mode 40x04 display
LCD in parallel 4 bit mode
Hardware:
this is for 40x04 LCD, consisting of basically two displays, hence the two enable lines
LCD should be wired as follows:
LCD UNO
--------------------------
VSS GND GND
VDD 5V 5V
V0 - contrast - connect a poti to GND, around 2K7
RS P8 RS
RW GND - Read/Write not used in this library - must be pulled down to GND !(!!!)
E P9 Enable 1
E2 P11 Enable 2
D0 - not used in 4bit mode
D1 - not used in 4bit mode
D2 - not used in 4bit mode
D3 - not used in 4bit mode
D4 P4 DB4
D5 P5 DB5
D6 P6 DB6
D7 P7 DB7
LEDA 5V
LEDK GND P10 Backlight circuitry (HIGH signal enables backlight using a simple NPN transistor)
pinout of two row connector:
2 db6 grau 1 db7 weiss
4 db4 blau 3 db5 lila
6 db2 - 5 db3 -
8 db0 - 7 db1 -
10 RW dunkelbraun 9 E1 grün
12 V0 blau 11 RS gelb
14 VDD orange 13 GND schwarz
16 NC - 15 E2 hellbraun
18 LEDA dottergelb 17 LEDK orange
by noiasca
2021-08-15 base 2716/356 base 4bit
2021-05-16 needs rework
-
2021-04-05 Base 4bit 2124/201
*******************************************************************************/
#include <NoiascaLiquidCrystal.h> // download library from https://werner.rothschopf.net/microcontroller/202012_arduino_liquid_crystal_4004_en.htm
#include <NoiascaHW/lcd_4bit.h> // parallel interface, 4bit
const byte cols = 40; // 40 columns/characters per row (must be correct for the 40x4)
const byte rows = 4; // 4 rows
const byte rs = 8; // RS pin
//const byte rw = 255; // RW pin is not used, therefore leave it 255
const byte en = 9; // enable pin for first IC (upper rows)
const byte en2 = 11; // enable pin for second IC (lower rows)
const byte d4 = 4; // data pin
const byte d5 = 5; // data pin
const byte d6 = 6; // data pin
const byte d7 = 7; // data pin
const byte bl = 255; // set to 255 if not used
//const t_backlightPol blType = POSITIVE;// set to either POSITIVE, NEGATIVE
LiquidCrystal_4bit_4004 lcd(rs, en, en2, d4, d5, d6, d7, bl, POSITIVE, cols, rows); // standard UTF-8 support
//LiquidCrystal_4bit_4004 lcd(rs, en, en2, d4, d5, d6, d7, bl, POSITIVE, cols, rows, convert_small); // a converter (Ä gets ä)
//LiquidCrystal_4bit_4004_base lcd(rs, en, en2, d4, d5, d6, d7, bl, POSITIVE, cols, rows); // base class without UTF-8 support - only for testing
/*void demo1()
{
static byte row = 0;
row++;
if (row > 3) row = 0;
delay(1000);
lcd.clear();
lcd.setCursor(random(0, 30), row);
lcd.print(millis() / 1000);
row++;
if (row > 3) row = 0;
lcd.setCursor(0, row);
lcd.print( ("123456789A123456789B123456789C123456789D"));
}
*/
void setup()
{
Serial.begin(115200);
lcd.begin(); // initialize the LCD
//lcd.backlight(); // turn on backlight
lcd.setCursor(0, 0);
lcd.print("Hello, world! ");
Serial.println("Hello, world! ");
lcd.setCursor(0, 1);
lcd.print("Arduino_mega");
Serial.println("arduino mega");
//lcd.print("aßµS°÷8??äöüßÄÖÜ"); // show some special character entered in UTF-8
//lcd.print( ("123456789a123456789b123456789c123456789d"));
lcd.setCursor(0, 2);
lcd.print("123456789A123456789B123456789C123456789D");
Serial.println("123456789A123456789B123456789C123456789D");
lcd.setCursor(0, 3);
lcd.print("noiasca liquid crystal 4004");
Serial.println("noiasca liquid crystal 4004");
}
void loop()
{
//demo1();
}
On display i see ;
Hello, word is OK
arduino mega and 1234567.......... on the same line, superimposed
noiasca liquid crystal 4004 is ok.
I see the output on Serial port and this test is all ok
Hello, word
arduino mega
123456.....
noiasca liquid crystal 4004
Basically, the second and third are superimposed on the second line.
just as the fourth line is written ok to the third line.
Thanks.
Jacob
