Problem with Costum Characters

Using Arduino Programming Questions
1

Hey folks

For a school project I'm programming a few emoticons. Each of them is over four fields. I've done this for 4 smileys now. first worked. second also. but since the third it doesnt work anymore: first smiley should be :frowning: but is :). 4th isnt displayed right. I culdnt find any mistake in the code, hope You can :).

#include <LiquidCrystal.h>

LiquidCrystal lcd(12,11,5,4,3,2);

byte A[8] = { // :frowning:
0b00000,
0b00000,
0b11100,
0b11100,
0b11100,
0b00000,
0b00000,
0b00000
};
byte B[8] = {
0b00011,
0b00110,
0b01100,
0b01100,
0b11000,
0b11000,
0b11000,
0b11000
};
byte C[8] = {
0b00000,
0b00000,
0b00000,
0b11100,
0b11100,
0b11100,
0b00000,
0b00000
};
byte D[8] = {
0b11000,
0b11000,
0b11000,
0b11000,
0b01100,
0b01100,
0b00110,
0b00011
};

byte E[8] = { // :smiley:
0b00001,
0b00001,
0b11101,
0b11101,
0b11101,
0b00001,
0b00001,
0b00001
};
byte F[8] = {
0b11000,
0b11100,
0b10110,
0b10110,
0b10011,
0b10011,
0b10011,
0b10011
};
byte G[8] = {
0b00001,
0b00001,
0b00001,
0b11101,
0b11101,
0b11101,
0b00001,
0b00001
};
byte H[8] = {
0b10011,
0b10011,
0b10011,
0b10011,
0b10110,
0b10110,
0b11100,
0b11000
};

byte I[8] = { //:slight_smile:
0b00000,
0b00000,
0b11100,
0b11100,
0b11100,
0b00000,
0b00000,
0b00000
};
byte J[8] = {
0b11000,
0b01100,
0b00110,
0b00110,
0b00011,
0b00011,
0b00011,
0b00011
};
byte K[8] = {
0b00000,
0b00000,
0b00000,
0b11100,
0b11100,
0b11100,
0b00000,
0b00000
};
byte L[8] = {
0b00011,
0b00011,
0b00011,
0b00011,
0b00110,
0b00110,
0b01100,
0b11000
};

byte M[8] = { //:open_mouth:
0b00000,
0b00000,
0b11100,
0b11100,
0b11100,
0b00000,
0b00000,
0b00000
};
byte N[8] = {
0b00000,
0b00000,
0b01110,
0b10001,
0b10001,
0b10001,
0b10001,
0b10001
};
byte O[8] = {
0b00000,
0b00000,
0b00000,
0b11100,
0b11100,
0b11100,
0b00000,
0b00000
};
byte P[8] = {
0b10001,
0b10001,
0b10001,
0b10001,
0b10001,
0b01110,
0b00000,
0b00000
};

void setup() {
lcd.begin(16,2);

lcd.createChar(1,A);
lcd.createChar(2,B);
lcd.createChar(3,C);
lcd.createChar(4,D);

lcd.createChar(5,E);
lcd.createChar(6,F);
lcd.createChar(7,G);
lcd.createChar(8,H);

lcd.createChar(9,I);
lcd.createChar(10,J);
lcd.createChar(11,K);
lcd.createChar(12,L);

lcd.createChar(13,M);
lcd.createChar(14,N);
lcd.createChar(15,O);
lcd.createChar(16,P);
}

void loop() {
lcd.setCursor(0,0);
lcd.write(1);
lcd.setCursor(1,0);
lcd.write(2);
lcd.setCursor(0,1);
lcd.write(3);
lcd.setCursor(1,1);
lcd.write(4);

lcd.setCursor(2,0);
lcd.write(5);
lcd.setCursor(3,0);
lcd.write(6);
lcd.setCursor(2,1);
lcd.write(7);
lcd.setCursor(3,1);
lcd.write(8);

lcd.setCursor(4,0);
lcd.write(9);
lcd.setCursor(5,0);
lcd.write(10);
lcd.setCursor(4,1);
lcd.write(11);
lcd.setCursor(5,1);
lcd.write(12);

lcd.setCursor(6,0);
lcd.write(13);
lcd.setCursor(7,0);
lcd.write(14);
lcd.setCursor(6,1);
lcd.write(15);
lcd.setCursor(7,1);
lcd.write(16);

}

2

It seems it is only possible to create 8 different custom chars, not 16.

createChar()
Description

Create a custom character (gylph) for use on the LCD.
Up to eight characters of 5x8 pixels are supported (numbered 0 to 7).
The appearance of each custom character is specified by an array of eight bytes,
one for each row. The five least significant bits of each byte determine the pixels
in that row. To display a custom character on the screen, write() its number.
3

Whandall:
It seems it is only possible to create 8 different custom chars, not 16.

Yes, it is. Additionally, the index of createChar is in the range 0 to 7 only.

Laura_95 is missing to use "lcd.createChar(0,...", so that reduces the possible user defined characters visible at the same time to 7 only.

The limit of 8 only belongs to "characters visible at the same time", so it is easily possible to create 8 smileys and show them on one screen, and after clearing the screen and generating another 8 different smileys it would be possible to show 8 different smileys the next moment (or any time).

4