i have a problem with lcd

here is all my information:

#include <mega16.h>

// Alphanumeric LCD Module functions
#asm
.equ __lcd_port=0x1B ;PORTA
#endasm
#include <lcd.h>

// Declare your global variables here


#include <stdio.h>
#include <math.h>
#include <stdlib.h>



// Declare your global variables here
int A;

void main(void)
{
// Declare your local variables here

// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTA=0x00;
DDRA=0xff;

// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTB=0x00;
DDRB=0xff;

// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTC=0xff;
DDRC=0x00;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTD=0x00;
DDRD=0xff;


// LCD module initialization
lcd_init(16);
lcd_clear();
lcd_gotoxy(0,0);

while (1)
{
A=PINC;
if(A<10){switch(A){
case 0ORTD=0b10000001;lcd_putsf("0");lcd_gotoxy(0,0);break;
case 1ORTD=0b11110011;lcd_putsf("1");lcd_gotoxy(0,0);break;
case 2ORTD=0b01001001;lcd_putsf("2");lcd_gotoxy(0,0);break;
case 3ORTD=0b01100001;lcd_putsf("3");lcd_gotoxy(0,0);break;
case 4ORTD=0b00110011;lcd_putsf("4");lcd_gotoxy(0,0);break;
case 5ORTD=0b00100101;lcd_putsf("5");lcd_gotoxy(0,0);break;
case 6ORTD=0b00000101;lcd_putsf("6");lcd_gotoxy(0,0);break;
case 7ORTD=0b11110001;lcd_putsf("7");lcd_gotoxy(0,0);break;
case 8ORTD=0b00000001;lcd_putsf("8");lcd_gotoxy(0,0);break;
case 9ORTD=0b00100001;lcd_putsf("9");lcd_gotoxy(0,0);break;
}
}





}

}
with this program,lcd &7segment show numbers between 0&3.it cann't show numbers between 4&9
my lcd is 2x16
and it is a character lcd

You are calling the lcd/led function many thousand times per second, use a delay_ms(200) inside the while
to limit the refresh to 4-5 times/sec or lower.
What is you input on portC, do you use switches to ground the pins.
You have internal pull ups to all pins so the initial value is 255 (all 1s),
you have to ground all pins externally and then disconnect only the pins you want enabled.
For example for 3 you want 00000011 so you must disconnect the ground from pin 0 and 1 of portC.
The second solution is to use A=~PINC
In this case the default value will be the inverse of 11111111 which is 00000000 so you
only have to ground the pins you want enabled.
If for example you ground pins 0 and 1 of portC (others pins floating) then pinC will be 11111100 and ~pinC will be 00000011 which is value 3.

Alex

In your program you had used LCD in PORTA and using the same for input.
Either change the lcd port or input port

nandhu015 said:

In your program you had used LCD in PORTA and using the same for input.
Either change the lcd port or input port

Click to expand...

The code is written with codevision, the code in the first lines
defines the lcd port to portA and lcd_init() called later initializes the port direction (I/O) correctly as output.
portA in not used anywhere else as input.

Alex

alexan_e said:

The code is written with codevision, the code in the first lines

Code:

#asm
.equ __lcd_port=0x1B ;PORTA
#endasm
#include <lcd.h>

defines the lcd port to portA and lcd_init() called later initializes the port direction (I/O) correctly as output.
portA in not used anywhere else as input.

Alex

Click to expand...

Sorry my mistake
May be JTAG Enabled. If so disable JTAG