Hi. I cannot use the sprintf function. I get an error in building the code. How should be included, the sprintf function?

how do add lcd.h header file in the project

Hello, Ive ordered the pic you re using, but my lcd is a qapass 16×2 lcd ( from the elegoo mega 2560 kit). From your experience, do you know if the lcd controller is compatible or do i need to buy a new lcd…where did you buy yours from? Does it exist on amazon or ebay? If yes could you provide a link?
Thank you!!!

I need this

I have warning, MPLAB V5 XC8, PIC18F4550, Internal oscillator,
but it works great, It’s a great help !!!

warning is

./lcd.h:7:3: warning: ‘RD4’ is deprecated [-Wdeprecated-declarations]
D4 = 1;
^
main.c:5:12: note: expanded from macro ‘D4’
#define D4 RD4
^

Did you tried other programs ? It is not an error of above program. Try changing the microcontroller or programmer.

Hey where can i get LCD.h and UART.h files

HI SIR. If i use pic18f248 processor, what modifications need to be done? i am using 16 mhz oscillator with a hardwear device

Yeah great post … Can i get the code for LCD interface ? thanks in advance (mail id – [email protected])

HI, Who i can print pixel whit the LCD, creating news caracters, example pacman or gasper

Programming Target (4/28/2017 12:54:35 PM)
PIC16F877A found (Rev 0x8)
Erasing Target
Programming Configuration Memory
Verifying Configuration Memory
PK2Error0027: Failed verify (Address = 0x2007 – Expected Value 0x2F4A – Value Read 0xA85)
PICkit 2 Ready

We have encountered this problem when the code is programmed. What can I get rid of this problem?

Hi, Ligo can you provide xc8 code for 16×1 LCD interfacing with PIC?? Thanks in advance.

Hi, I need to show 4 messages in differents lines , I have intented with “LM044L” LCD, but until now I have been unable. Thanks

That is not a problem. For simulating LED is not required. It will work fine in simualtion without those LED connections.

In the proteus circuit, the LCD LM016L does not have the last two ports LED+ and LED-
i have loaded ur code to the pic16F877A and did all the connections the way u did except for those two LED ports in the lcd, and the lcd didn’t show anything when i ran it, any help?

You need to include the header file stdio.h for that.

Hi Ligo, Yes the header file is included and the main program is working great. The problem is only with the ‘sprintf’ example – I copied the code exactly as given but the program is returning ‘ build failed’. There are some empty spaces (dots) in your example, what does this mean. Appreciate your help. Thanks

Yes, contrast and backlight are different.

I haave checked the connections and they seem fine. Would i need to worry about contrast if the backlight is not used ? I still have no luck !:(

Hi,
Make sure that all connections are correct and also try adjusting the contrast.

Please please please!! can some one help I cannot get it to work.
I only get the top row showing blocks as if I am only applying power.
I am using the pic16f690.

I have made the following changes and connections

#define RS RC0
#define EN RC1
#define D4 RC2
#define D5 RC3
#define D6 RC4
#define D7 RC5

also I have TRISC 0x00

I am using the internal clock and as far as I know I have emended the code accordingly

lcd.h

#include
//LCD Header for 4 bit Data -MPLABX/XC8
#define _XTAL_FREQ 8000000
#define RS RC0
#define EN RC1
#define D4 RC2
#define D5 RC3
#define D6 RC4
#define D7 RC5
char temp,z,y;
int i;
void Lcd_Port(char a)
{
if(a & 1)
D4 = 1;
else
D4 = 0;

if(a & 2)
D5 = 1;
else
D5 = 0;

if(a & 4)
D6 = 1;
else
D6 = 0;

if(a & 8)
D7 = 1;
else
D7 = 0;
}
void Lcd_Cmd(char a)
{
RS = 0; // D0 to D7 interpreted as Command

Lcd_Port(a);
EN = 1; // LCD Enable
__delay_ms(4);
EN = 0; // LCD Disable
}

Lcd_Clear()
{
Lcd_Cmd(0);
Lcd_Cmd(1);
}

void Lcd_Set_Cursor(char a, char b)
{
char temp,z,y;
if(a == 1)
{
temp = 0x80 + b – 1;
z = temp>>4;
y = temp & 0x0F;
Lcd_Cmd(z);
Lcd_Cmd(y);
}
else if(a == 2)
{
temp = 0xC0 + b – 1;
z = temp>>4;
y = temp & 0x0F;
Lcd_Cmd(z);
Lcd_Cmd(y);
}
}

void Lcd_Init()
{
Lcd_Port(0x00);
__delay_ms(20);
Lcd_Cmd(0x03);
__delay_ms(5);
Lcd_Cmd(0x03);
__delay_ms(11);
Lcd_Cmd(0x03);

Lcd_Cmd(0x02);
Lcd_Cmd(0x02);
Lcd_Cmd(0x08);
Lcd_Cmd(0x00);
Lcd_Cmd(0x0C);
Lcd_Cmd(0x00);
Lcd_Cmd(0x06);
}

void Lcd_Write_Char(char a)
{
char temp,y;
temp = a&0x0F;
y = a&0xF0;
RS = 1; // D to D7 interpreted as DATA
Lcd_Port(y>>4); //Data transfer
EN = 1;
__delay_us(40);
EN = 0;
Lcd_Port(temp);
EN = 1;
__delay_us(40);
EN = 0;
}

void Lcd_Write_String(char *a)
{
int i;
for(i=0;a[i]!=”;i++)
Lcd_Write_Char(a[i]);
}

void Lcd_Shift_Right()
{
Lcd_Cmd(0x01);
Lcd_Cmd(0x0C);
}

void Lcd_Shift_Left()
{
Lcd_Cmd(0x01);
Lcd_Cmd(0x08);
}

main.c
#define _XTAL_FREQ 8000000

#define RS RC0
#define EN RC1
#define D4 RC2
#define D5 RC3
#define D6 RC4
#define D7 RC5
// BEGIN CONFIG

#pragma config FOSC = INTRCCLK // Oscillator Selection bits (INTOSC oscillator: CLKOUT function on RA4/OSC2/CLKOUT pin, I/O function on RA5/OSC1/CLKIN)
#pragma config WDTE = OFF // Watchdog Timer Enable bit (WDT disabled and can be enabled by SWDTEN bit of the WDTCON register)
#pragma config PWRTE = OFF // Power-up Timer Enable bit (PWRT disabled)
#pragma config MCLRE = ON // MCLR Pin Function Select bit (MCLR pin function is MCLR)
#pragma config CP = OFF // Code Protection bit (Program memory code protection is disabled)
#pragma config CPD = OFF // Data Code Protection bit (Data memory code protection is disabled)
#pragma config BOREN = ON // Brown-out Reset Selection bits (BOR enabled)
#pragma config IESO = ON // Internal External Switchover bit (Internal External Switchover mode is enabled)
#pragma config FCMEN = ON // Fail-Safe Clock Monitor Enabled bit (Fail-Safe Clock Monitor is enabled)

//END CONFIG
#include

#include “lcd.h”;

void main()
{
unsigned int a;
TRISC0 = 0x00;
TRISC1 = 0x00;
TRISC2 = 0x00;
TRISC3 = 0x00;
TRISC4 = 0x00;
TRISC5 = 0x00;
Lcd_Init();
while(1)
{
Lcd_Clear();
Lcd_Set_Cursor(1,1);
Lcd_Write_String(“LCD Library fr”);
__delay_ms(290);
//Lcd_Set_Cursor(2,1);
//Lcd_Write_String(“MPLAB XC8”);
//__delay_ms(100);
//Lcd_Clear();
//Lcd_Set_Cursor(1,1);
//Lcd_Write_String(“WWW.ALSELECTRO.COM”);
//__delay_ms(100);
//Lcd_Clear();
//Lcd_Set_Cursor(1,1);
//Lcd_Write_String(“Saravana Electronics”);
}
/* for(a=0;a<15;a++)
{
__delay_ms(10);
Lcd_Shift_Left();
}

for(a=0;a<15;a++)
{
__delay_ms(10);
Lcd_Shift_Right();
}

Lcd_Clear();
Lcd_Set_Cursor(2,1);
Lcd_Write_Char('S');
Lcd_Write_Char('E');
__delay_ms(10);
}
*/
}

Please give the details of the problem you are facing. What is the current output ? Put photos and code here.

Hello, I’m trying since 3 week to display a 2×16 LCD but it is not working. I use the PIC16F1937 MCU. can you please help me? please!!!

Thanks bro you literally saved me days of hacking, tacking and patching to get my own working code.

That is due to delay limit. You need to make another used defined function, something like this :

void Delay10(unsigned a)
{
for(;a>0;a–)
{
__delay_ms(10)
}
}

Above code is for XC8 compiler .. not for Hi-Tech C… Just change the header file xc.h to htc.h.

need help pls

#include

how to get this file header pls help

Hi Ligo,
Could you please send me the link to download the MPLab XC8 Compiler to execute the above program? I’m not able to find a reliable link.
Thanks in advance. 🙂

Check your LCD datasheet. You might need to make minor changes in the address in library.

Sorry, your question is outside the scope of above article. Please use our forums ( https://electrosome.com/forums ) for such questions.

Hi,

thanks for your code.
I use it on picdem2plus demoboard with a Pic18F452 and XC8 and it works (after pin modifications).
But I have warnings for each time I call Lcd_Write_String() function, here is the warning:
“Warning [359] illegal conversion between pointer types
pointer to const unsigned char -> pointer to unsigned char”
Now on my program I call 34 times this function, but I use it one more time the programmin delay is long and after powering the board nothing on the LCD.
Any one can help?

Ligo George ,

how are you? i am looking for a a circuit diagram which consist of pic18F4520 and the sensor, the target of this circuit that I need when it is below 6 meters the sensor give a signal to the pic to make yellow led is flashing, while when the sensor reach exactly to 6 meters the pic give a signal to switch off yellow led and make green led is on, if the sensor exceed 6 meters the red led is on and giving sound to the buzzer.
if you do not mind could you help me in that please with the code using Proteus program.
Regads,
Ahmed

Please read the tutorial : https://electrosome.com/custom-characters-lcd-pic-mplab-xc8/

Hi, I´m trying this code in Mplab, but when i generate the .hex I can´t run it in PIC Simulator it shows me this message: “Invalid program file in Hex Format contains error. Line number 197: Invalid data byte in the record. ” Can You tell me why?

How can I create or make a custom character an print it into the LCD??

Yes, you can use the above header file for that.

No, you can download it above. It is the zipped project folder.

PORTA is the analog port. Set all pins to Digital by writing to appropriate registers. Also disable other functions like comparator.

CONVERTING AN INT WITH ATOI

If your processor won’t handle sprintf(); or it’s using up too much space, and you just only need to print an int, try the atoi(); function. It’s available in the XC8 Complier library, see page 369.

Requires:
#include

Sample Code:

int j = 14; //declare int and put 14 in it.

char buffer[17]; //Allow 16char + one null for 16 character display
itoa(buffer, j, 10); //convert int j to ASCII, base 10. Load into char buffer[];
Lcd_Set_Cursor(2,1);
Lcd_Write_String(buffer);

This code will write the number value of j, in this case 14, on the display on the second line. Helpful if you are building a simple counter or wanting to print the result of some int manipulation.

did you changed the TRIS and clock configurations? I used the same micro (with PORTD) and worked fine. This is my config

// CONFIG1
#pragma config FOSC = INTRC_NOCLKOUT
#pragma config WDTE = OFF
#pragma config PWRTE = OFF
#pragma config MCLRE = ON
#pragma config CP = OFF
#pragma config CPD = OFF
#pragma config BOREN = ON
#pragma config IESO = OFF
#pragma config FCMEN = OFF
#pragma config LVP = OFF

// CONFIG2
#pragma config BOR4V = BOR40V
#pragma config WRT = OFF

Don’t you see the download link above ?

from where it can be downloaded Ligo ???

#define _XTAL_FREQ 8000000

#define RS RD2

#define EN RD3

#define D4 RD4

#define D5 RD5

#define D6 RD6

#define D7 RD7

#include

#include “lcd.h”

int main()

{

TRISD = 0x00;

Lcd_Init();

while(1)

{

Lcd_Clear();

float f = 1.414;

int s = 56;

char a[20];

sprintf(a, “Float = %f”, f);

Lcd_Set_Cursor(1,1);

Lcd_Write_String(a);

sprintf(a, “Integer = %d”, s);

Lcd_Set_Cursor(2,1);

Lcd_Write_String(a);

}}

OK, i got it. thank you for your tutorial.

Dear Ligo George

After build project i found error “can’t open include file “lcd.h”: No such file or directory”.why my compiler don’t have libraly file “lcd.h”. How can i get it from?

Thank you

any one can explain set cursor portion how to select temp value 0x80 and 0xc0 for 2 nd line.

hi, please can you tell me how to make this library work with the PIC18f4520, Nothing happens at the moment I have managed to fix the errors.
Thanks

This entire code stops working as soon as I change the properties to Pic18F4520.
Why?

You can download it above.

replace the following portion of code in lcd.h and save. then build.

problem will be solved…….

void Lcd_Write_String(const char *a)
{
int i;
for(i=0;a[i]!=”;i++)
Lcd_Write_Char(a[i]);
}

HI all ,Can someone help me for programing this circuit with MPLAB XC8 ,on use the pic18f2550 , thanks

lcd.h code where?

It was the pic, some burned port. Changed for a new one and work perfectly. Thanks

It is just to send lcd data to corresponding defined pins…
It just ANDing “a” and “value”….
Try to understand it .. just after converting both “a” and “value” to binary.

Excellent work! Routines work great.

My knowledge of C is lacking and I don’t understand the following results.

I guess I dont understand what you are testing in the variable ‘a’

Line taken from Lcd_Init………

Lcd_Port(0x0C)

void Lcd_Port(char a)
{
if(a & 1) <—- evaluates FALSE in simulator
D4 = 1;
else
D4 = 0;

if(a & 2) <—— evaluates FALSE in simulator
D5 = 1;
else
D5 = 0;

if(a & 4) <——- evaluates TRUE in simulator
D6 = 1;
else
D6 = 0;

if(a & 8) <—— evaluates TRUE in simulator
D7 = 1;
else
D7 = 0;
}

Sorry, I don’t understand your question.
Please use our forums, https://electrosome.com/forums for asking doubts not reated to above article.

It is a warning … not error..
for pring integer and floating point variables you can use sprintf() function.

Following link will help you.
https://electrosome.com/topic/display-float-lcd-mplab-xc8/

Hello, the above library is for XC8 compiler.. not for XC18.. they are different..

Which operating system you are using ?
In windows, just right click and extract it..

Or should I say where do I get the file lcd.h ?

If your LCD controller is compatible with HD44780U, that LCD will work… but you may face some issue with display locations..

Check and edit the function for setting cursor position in the header file..

It is a clone of HD44780, so the above library will work… You may need to make little modifications in the library, to display in correct positions..

Thanks for the feedback….
I am not sure about 20×4 LCD, just try using above library… it might work if the LCD controller is compatible..

Are you sure that you are using MPLAB XC8 compiler.. ??

Make sure that your compiler is working fine…
Above projects files are tested and it is 100% working.

Hi, I am using PIC16F883 on PICDEM 2 demo board. I have used your code but changed the pin outs to suit the pic16f and demo board. I am curious if using 20mhz external oscillator is timings will need to be adjusted in the code provided