[PIC] GLCD garbage/unwanted text problem

[th3gr8]

Hello all ..
I have interfaced a 128x64 GLCD and keypad with microcontroller (PIC16F877A) .. The problem i am facing is that GLCD shows garbage text first and when i reset the PIC and start again, GLCD displays more garbage text and the garbage text increases with every reset .. How can i remove this garbage text??

I am posting code of function which receives data from keypad and displays it on GLCD.

int readThermometer(void)
{
n=0;
while(1)
{
k = kbd_getc();
if(k!=0)
{
temp1[n]=k;
//!if(temp1[n]=='*')
//!{
//!temp1[n]='.';
//!}
if(k=='#')
{
goto here;
}
glcd_text57(5, 15, temp1,1,ON);
here:
k=0;
delay_ms(250);
n++;
}
delay_ms(1);
if(temp1[n-1]=='#')
{
unsigned int8 length, count,i;
length = strlen(temp1);
count=length-1;
for(i=count;i<count+1;i--)
{
temp2[count-i] = temp1[count-i];
}
//!if(temp1[n-1]=='#')
//!{
//!temp2[0] = temp1[0];
//!temp2[1] = temp1[1];
//!temp2[2] = temp1[2];
//!temp2[3] = 0;
temp3=atoi(temp2);
break;
}
}
return temp3;
}

Pictures of garbage text:

 

[udayan92]

I think that the garbage display problem has less to do with the keyboard input function you have shared and more to do with the graphic display function used.Check on the display function. Share the display function code if possible.

 

[th3gr8]

I think that the garbage display problem has less to do with the keyboard input function you have shared and more to do with the graphic display function used.Check on the display function. Share the display function code if possible.

Thankyou for your reply .. but i didn't get you .. Display function code is also in this code "glcd_text57()" .. and i've used GLCD.C library of PIC-CCS ..

 

[ud23]

check out your lcd data and command pins hardware connection loose connection or any noise pic up can cause this type of issues.

 

[lguancho]

Hi. Go to the "GLCD.c" driver file, and change the following parameters:

#define GLCD_LEFT 1 (originally is 0)
#define GLCD_RIGHT 0 (originally is 1)

You should be able to get the correct display!!!

 

[milan.rajik]

Change to PIC18F.