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[SOLVED] PIC 16F877 interface with LCD 2 x 16 Custom character not showing

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WStevens_sa

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Hi Guys

I have added a custom character to my program but it does not show. You will see I call it from "void CustomChar(char pos_row, char pos_char)" but it does not display on row2 column1.

// LCD module connections
sbit LCD_RS at RB4_bit;
sbit LCD_EN at RB5_bit;
sbit LCD_D4 at RB0_bit;
sbit LCD_D5 at RB1_bit;
sbit LCD_D6 at RB2_bit;
sbit LCD_D7 at RB3_bit;

sbit LCD_RS_Direction at TRISB4_bit;
sbit LCD_EN_Direction at TRISB5_bit;
sbit LCD_D4_Direction at TRISB0_bit;
sbit LCD_D5_Direction at TRISB1_bit;
sbit LCD_D6_Direction at TRISB2_bit;
sbit LCD_D7_Direction at TRISB3_bit;
// End LCD module connections


char txt1[] = "MON 14:21 +55°c";
char txt2[] = "";
char txt3[] = "Lcd4bit"; //displayed first
char txt4[] = "example"; //displayef second

char i; // Loop variable

void Move_Delay() { // Function used for text moving
Delay_ms(500); // You can change the moving speed here
}

const char character[] = {14,17,14,14,14,17,14,0};
void CustomChar(char pos_row, char pos_char) {
char i;
Lcd_Cmd(74);
for (i = 0; i<=7; i++) Lcd_Chr_CP(character);
Lcd_Cmd(_LCD_RETURN_HOME);
Lcd_Chr(pos_row, pos_char, 1);
}

void main(){

ADCON1=6;

Lcd_Init(); // Initialize LCD

Lcd_Cmd(_LCD_CLEAR); // Clear display
Lcd_Cmd(_LCD_CURSOR_OFF); // Cursor off

//Lcd_Out(1,6,txt3); // Write text in first row
//Lcd_Out(2,6,txt4); // Write text in second row
//Delay_ms(2000);

Lcd_Cmd(_LCD_CLEAR); // Clear display



Lcd_Out(1,1,txt1); // Write text in first row Para1=Row1 Par2=column
//Lcd_Out(2,1,txt2); // Write text in second row
CustomChar(2,1);

Delay_ms(2000);







// Moving text
for(i=0; i<4; i++) { // Move text to the right 4 times
Lcd_Cmd(_LCD_SHIFT_RIGHT);
Move_Delay();
}

while(1) { // Endless loop
for(i=0; i<8; i++) { // Move text to the left 7 times
Lcd_Cmd(_LCD_SHIFT_LEFT);
Move_Delay();
}

for(i=0; i<8; i++) { // Move text to the right 7 times
Lcd_Cmd(_LCD_SHIFT_RIGHT);
Move_Delay();
}
}
}
Click to expand...
 

Does anybody have an idea. I have googled almost the whole day and cannot find a solution. Every other standard character appears on the LCD with no Problem. I also noted that when I use the CustomChar() It does clear the position it just does not show the custom character. Suggestions or help will be appreciated.M
 
Last edited:

WStevens_sa said:
Does anybody have an idea. I have googled almost the whole day and cannot find a solution. Every other standard character appears on the LCD with no Problem. I also noted that when I use the CustomChar() It does clear the position it just does not show the custom character. Suggestions or help will be appreciated.M
Click to expand...

Hi WStevens_sa!
I am tried to develop custom character display program.
This is the program. It’s working.
Hi world!
Try to develop more…. Send to edaboard.



sbit LCD_RS at RB4_bit;
sbit LCD_EN at RB5_bit;
sbit LCD_D4 at RB0_bit;
sbit LCD_D5 at RB1_bit;
sbit LCD_D6 at RB2_bit;
sbit LCD_D7 at RB3_bit;

sbit LCD_RS_Direction at TRISB4_bit;
sbit LCD_EN_Direction at TRISB5_bit;
sbit LCD_D4_Direction at TRISB0_bit;
sbit LCD_D5_Direction at TRISB1_bit;
sbit LCD_D6_Direction at TRISB2_bit;
sbit LCD_D7_Direction at TRISB3_bit;
const char characterD[]= {31,9,9,9,9,9,31,0};

void CustomCharD(char pos_row, char pos_char) {
char i;
Lcd_Cmd(64);
for (i = 0; i<=7; i++) Lcd_Chr_CP(characterD);
Lcd_Cmd(_LCD_RETURN_HOME);
//Lcd_Chr(pos_row, pos_char, 0);
Lcd_Chr(pos_row, pos_char, 0);
}
const char characterE[] = {31,16,16,31,16,16,31,0};

void CustomCharE(char pos_row, char pos_char) {
char i;
Lcd_Cmd(72);
for (i = 0; i<=7; i++) Lcd_Chr_CP(characterE);
Lcd_Cmd(_LCD_RETURN_HOME);
Lcd_Chr(pos_row, pos_char, 1);
}
const char characterN[] = {17,17,25,21,19,17,17,0};

void CustomCharN(char pos_row, char pos_char) {
char i;
Lcd_Cmd(80);
for (i = 0; i<=7; i++) Lcd_Chr_CP(characterN);
Lcd_Cmd(_LCD_RETURN_HOME);
Lcd_Chr(pos_row, pos_char, 2);
}
const char characterS[] = {31,16,16,31,1,1,31,0};

void CustomCharS(char pos_row, char pos_char) {
char i;
Lcd_Cmd( 88 );

for (i = 0; i<=7; i++) Lcd_Chr_CP(characterS);
Lcd_Cmd(_LCD_RETURN_HOME);
Lcd_Chr(pos_row, pos_char, 3);
}
const char characterH[] = {17,17,17,31,17,17,17,0};

void CustomCharH(char pos_row, char pos_char) {
char i;
Lcd_Cmd(96);
for (i = 0; i<=7; i++) Lcd_Chr_CP(characterH);
Lcd_Cmd(_LCD_RETURN_HOME);
Lcd_Chr(pos_row, pos_char, 4);
}
const char characterI[] = {4,4,4,4,4,4,4,0};

void CustomCharI(char pos_row, char pos_char) {
char i;
Lcd_Cmd(104);
for (i = 0; i<=7; i++) Lcd_Chr_CP(characterI);
Lcd_Cmd(_LCD_RETURN_HOME);
Lcd_Chr(pos_row, pos_char, 5);
}

const char characterL[] = {16,16,16,16,16,16,31,0};

void CustomCharL(char pos_row, char pos_char) {
char i;
Lcd_Cmd(112);
for (i = 0; i<=7; i++) Lcd_Chr_CP(characterL);
Lcd_Cmd(_LCD_RETURN_HOME);
Lcd_Chr(pos_row, pos_char, 6);
}
const char characterHart[] = {10,21,17,17,10,4,4,0};

void CustomCharHart(char pos_row, char pos_char) {
char i;
Lcd_Cmd(120);
for (i = 0; i<=7; i++) Lcd_Chr_CP(characterHart);
Lcd_Cmd(_LCD_RETURN_HOME);
Lcd_Chr(pos_row, pos_char, 7);
}
void main(){
Lcd_Init();
Lcd_Cmd(_LCD_CLEAR);
Lcd_Cmd(_LCD_CURSOR_OFF);
Lcd_Cmd(_LCD_CLEAR);
CustomCharD(characterD,1);
CustomCharE(characterE,2);
CustomCharN(characterN,3);
CustomCharS(characterS,4);
CustomCharH(characterH,5);
CustomCharI(characterI,6);
CustomCharL(characterL,7);
CustomCharHart(characterHart,9);
CustomCharHart(characterHart,10);
CustomCharHart(characterHart,11);
CustomCharHart(characterHart,12);
CustomCharHart(characterHart,13);
CustomCharHart(characterHart,14);

}
 
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