smitgovani
Member level 2
When i write code in MPLAB software and buid it i got error.............
C:\Users\DCS\Desktop\example\ex1.c:76:Error: syntax error
nd my code is
C:\Users\DCS\Desktop\example\ex1.c:76:Error: syntax error
nd my code is
Code:
// Program to get input from keypad and display it on LCD.
#define pad PORTD
#define r1 PD0
#define r2 PD1
#define r3 PD2
#define r4 PD3
#define c1 PD4
#define c2 PD5
#define c3 PD6
void check1(void);
void check2(void);
void check3(void);
void check4(void);
#define LCD_DATA PORTA //LCD data port
#define ctrl PORTB
#define en PB2 //enable signal
#define rw PB1 //read/write signal
#define rs PB0 //resister select signal
void LCD_cmd(unsigned char cmd);
void init_LCD(void);
void LCD_write(unsigned char data);
unsigned int press;
int main()
{
unsigned char value;
DDRA=0xff; //LCD_DATA port as output port
DDRB=0x07; //signal as out put
DDRD=0x0F;
pad=0xf0;
init_LCD(); //initialization of LCD
LCD_write_string("press a key");
LCD_cmd(0xc0);
while(1)
{
PORTD=0xF0; //set all the input to one
value=PIND; //get the PORTD value in variable “value”
if(value!=0xf0) //if any key is pressed value changed
{
check1();
check2();
check3();
check4();
}
}
return 0;
}
void check1(void)
{
//DDRD = 0xf0;
pad =0b11111110;
//pad &= (0<<r1);
_delay_us(10);
if(bit_is_clear(PIND,c1))
LCD_write('1');
else if(bit_is_clear(PIND,c2))
LCD_write('2');
else if(bit_is_clear(PIND,c3))
LCD_write('3');
}
void check2(void)
{
pad=0b11111101;
/pad &= (0<<r2);
_delay_us(10); //ERROR LINE SHOWN
if(bit_is_clear(PIND,c1))
LCD_write('4');
else if(bit_is_clear(PIND,c2))
LCD_write('5');
else if(bit_is_clear(PIND,c3))
LCD_write('6');
}
void check3(void)
{
pad=0b11111011;
//pad &= (0<<r3);
_delay_us(10);
if(bit_is_clear(PIND,c1))
LCD_write('7');
else if(bit_is_clear(PIND,c2))
LCD_write('8');
else if(bit_is_clear(PIND,c3))
LCD_write('9');
}
void check4(void)
{
pad =0b11110111;
//pad &= (0<<r4);
_delay_us(10);
if(bit_is_clear(PIND,c1))
LCD_write('#');
else if(bit_is_clear(PIND,c2))
LCD_write('0');
else if(bit_is_clear(PIND,c3))
LCD_write('*');
}
void init_LCD(void)
{
LCD_cmd(0x38); //initializtion of 16X2 LCD in 8bit mode
_delay_ms(1);
LCD_cmd(0x01); //clear LCD
_delay_ms(1);
LCD_cmd(0x0E); //cursor ON
_delay_ms(1);
LCD_cmd(0x80); // ---8 go to first line and --0 is for 0th position
_delay_ms(1);
return;
}
void LCD_cmd(unsigned char cmd)
{
LCD_DATA=cmd;
ctrl =(0<<rs)|(0<<rw)|(1<<en); // making RS and RW as LOW and EN as HIGH
_delay_ms(1);
ctrl =(0<<rs)|(0<<rw)|(0<<en); // making RS, RW , LOW and EN as LOW
_delay_ms(50);
return;
}
void LCD_write(unsigned char data)
{
LCD_DATA= data;
ctrl = (1<<rs)|(0<<rw)|(1<<en); // making RW as LOW and RS, EN as HIGH
_delay_ms(1);
ctrl = (1<<rs)|(0<<rw)|(0<<en); // making EN and RW as LOW and RS HIGH
_delay_ms(50); // give a 10 milli second delay to get thigs executed
return ;
}
void LCD_write_string(unsigned char *str) //take address vaue of the string in pionter *str
{
int i=0;
while(str[i]!='\0') // loop will go on till the NULL charaters is soon in string
{
LCD_write(str[i]); // sending data on CD byte by byte
i++;
}
return;
}
Last edited by a moderator:
