How can I change LCD 128x64 code to LCD16x2 lcd

Other Hardware Displays
1

here is the code fore LCD 128X64 but I wanted to work this code for a 16X2 LCD display can that be possible?

#include "U8glib.h"

#define DELAY_TIMEOUT 1500

U8GLIB_ST7920_128X64_1X u8g(13,11, 10);

int ir_right_pin = 6;
int ir_left_pin = 7;

int ir_right_state = 0;
int ir_left_state = 0;

int ir_right_state_last = -1;
int ir_left_state_last = -1;

int in_counter = 0;
int out_counter = 0;

bool bWalkIn = false;
bool bWalkOut = false;
unsigned long tm;

// for display integer value
enum {BufSize=8}; // If a is short use a smaller number, eg 5 or 6
char buf[BufSize];

void draw(void) {
// graphic commands to redraw the complete screen should be placed here
u8g.setFont(u8g_font_fub20);
u8g.drawStr( 10, 25, "IN");
u8g.drawStr( 65, 25, "OUT");

u8g.setFont(u8g_font_timB24);

if( in_counter < 10){
snprintf (buf, BufSize, "00%d", in_counter);
}
else if( in_counter < 100){
snprintf (buf, BufSize, "0%d", in_counter);
}

u8g.drawStr( 5, 60, buf);

if( out_counter < 10){
snprintf (buf, BufSize, "00%d", out_counter);
}
else if( out_counter < 100){
snprintf (buf, BufSize, "0%d", out_counter);
}

u8g.drawStr( 70, 60, buf);

u8g.drawLine(60,0,60,63);
}

void setup(void) {

Serial.begin(9600);
pinMode( ir_right_pin, INPUT);
pinMode( ir_left_pin , INPUT);

// flip screen, if required
// u8g.setRot180();

// set SPI backup if required
//u8g.setHardwareBackup(u8g_backup_avr_spi);

// assign default color value
if ( u8g.getMode() == U8G_MODE_R3G3B2 ) {
u8g.setColorIndex(255); // white
}
else if ( u8g.getMode() == U8G_MODE_GRAY2BIT ) {
u8g.setColorIndex(3); // max intensity
}
else if ( u8g.getMode() == U8G_MODE_BW ) {
u8g.setColorIndex(1); // pixel on
}
else if ( u8g.getMode() == U8G_MODE_HICOLOR ) {
u8g.setHiColorByRGB(255,255,255);
}

updateLCD();
}

void loop(void) {

ir_right_state = digitalRead( ir_right_pin );
ir_left_state = digitalRead( ir_left_pin );

Serial.print( ir_left_state );
Serial.print( " " );
Serial.println( ir_right_state );

checkWalkIn();
checkWalkOUT();

}
void checkWalkIn(){

if( ir_right_state != ir_right_state_last ){

ir_right_state_last = ir_right_state;
if( (bWalkIn == false) && ( ir_right_state == LOW ) ){
bWalkIn = true;
tm = millis();
}
}

if( (millis() - tm) > DELAY_TIMEOUT ){
bWalkIn = false;
}

if( bWalkIn && (ir_left_state == LOW) && (ir_right_state == HIGH) ){
bWalkIn = false;
in_counter++;
updateLCD();
}

}
void checkWalkOUT(){

if( ir_left_state != ir_left_state_last ){

ir_left_state_last = ir_left_state;
if( (bWalkOut == false) && ( ir_left_state == LOW ) ){
bWalkOut = true;
tm = millis();
}
}

if( (millis() - tm) > DELAY_TIMEOUT ){
bWalkOut = false;
}

if( bWalkOut && (ir_right_state == LOW) && (ir_left_state == HIGH) ){
bWalkOut = false;
out_counter++;
updateLCD();
}

}
void updateLCD(){
u8g.firstPage();
do {
draw();
} while( u8g.nextPage() );
}

2

You have been a member for 3 years. Please edit your post to put the code in a "Code Window".

Personally, I print code on paper if there is something that is difficult to understand.

You can trace the u8g2 code. Replace with equivalent 16x2 code.

It will be nothing more than begin(), setCursor() and print(). Possibly with a clear()

Enjoy a nice cup of tea. Move away from your PC. You can design your new program by simply crossing out u8g2 statements with a pencil. Adding equivalent lcd statement.

When happy, perform the edits on the PC. It should work first time !!

David.

3

im really sorry sir I was on hurry because I need to finish this project by tommorow .

1 Like
4

david_prentice:
You have been a member for 3 years. Please edit your post to put the code in a "Code Window".

Personally, I print code on paper if there is something that is difficult to understand.

You can trace the u8g2 code. Replace with equivalent 16x2 code.

It will be nothing more than begin(), setCursor() and print(). Possibly with a clear()

Enjoy a nice cup of tea. Move away from your PC. You can design your new program by simply crossing out u8g2 statements with a pencil. Adding equivalent lcd statement.

When happy, perform the edits on the PC. It should work first time !!

David.

Sir can you give me the full code for 16x2? so that I will display the IN and OUT COUNTER

5

kalilinux25:
Sir can you give me the full code for 16x2? so that I will display the IN and OUT COUNTER

Seriously? You have been a member here for years, still you haven't learned that you don't come here ask for someone else to do your homework :o ...

// Per.