help please in this code

[Eng_Bandar]

I simulated the following circuit by proteus



my project if press the switch the message in LCD will appear but here the message appear before pressing Why? What is the problem ?
this is my code in MikroC

Code: Select all

char *text = "Hello world";
void main(){
TRISD=0xff;
while(1){
       if(portd.f0==0){
                       Lcd_Init(&PORTB);
                       Lcd_Cmd(LCD_CURSOR_OFF);
                       Lcd_Out(2,1,text);
                      }
        }
}

[Sobrietytest]

Try this...

Code: Select all

char *text = "Hello world";

void main(){

TRISD = 0xff;
Lcd_Init(&PORTB);
Lcd_Cmd(_LCD_CLEAR);

while(1){
       if(portd.f0 == 0){
					   Lcd_Cmd(LCD_CURSOR_OFF);
                       Lcd_Out(2,1,text);
                      }
		else{
			Lcd_Cmd(_LCD_CLEAR);
			}
        }
}

[Eng_Bandar]

I tried your code come this error

[basicbasic111]

r u using 16f877?


hmmmmmmmm

I only changed Sobrie's code to c pro 3.8

everything worked perfectly on my latest version of proteus


by the way two of your diagrams are tiny

i cannot see them clearly



I only changed these few parts for c pro 3.8



1

Code: Select all

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;

2

Code: Select all

Lcd_Init();

3.

Code: Select all

Lcd_Cmd(_LCD_CURSOR_OFF);

with a (_) within


that's it


I am sure we can work this out.


Please tell me which pic you are using

and which version of c you are using too


I will try to use the old version of c and make it work for you

[Eng_Bandar]

^^^^^^^^
Thank guys for your helping

I use pic16f877

about version of mikroc

mikroC, mikroElektronika C compiler
for Microchip PIC microcontrollers
Version: 8.1.0.0

about error



about connection ( may find error from connection )

[basicbasic111]

working code :

Code: Select all

char *text = "Hello world";

void main() {

TRISD = 0xff;
Lcd_Init(&PORTB);
Lcd_Cmd(LCD_CLEAR);

while(1){
       if(portd.f0 == 0){
                  Lcd_Cmd(LCD_CURSOR_OFF);
                       Lcd_Out(2,1,text);
                      }
      else{
         Lcd_Cmd(LCD_CLEAR);
         }
        }
}

settings default 8M external


Change your lcd connections as follows


Lcd_Init(&PORTB);

it means


D7 → portb.f7
D6 → portb.f6
D5 → portb.f5
D4 → portb.f4
E → portb.f3
RS → portb.f2
RW → portb.f0

try to link up the wires without using the bus
I simulated the above code and followed these connections

it worked very well on my latest proteus


hope it helps

Good luck!

[Eng_Bandar]

Thank basicbasic111 & Sobrietytest for your helping
Thank you so much

the project executed