#include<string.h>
#include<stdio.h>
#define __16f877A
#include"pic/pic16f877a.h"
//-----------------------Varables----------------------------//
//char x;
int dat;
int val;
int value;
int value1;
float value2;
int i;
char str[20];
//-----------------------Functions---------------------------//
//-------Delay-----------//
void delay1();
void delay2();
//-------Lcd------------//
void lcdinit();
void sendcom(char comm);
void busy();
//-------ADC-----------//
void adcinit();
void chselect();
void senddata(int dat);
void adc();
void multiply();
void mask();
//---------------------main function-------------------------//
void main(void)
{
PORTD=0x00;
PORTC=0x00;
TRISD=0x00;
TRISC=0x00;
delay1();
lcdinit();
adcinit();
while(1)
{
chselect();
delay2();
}
}
//---------------------lcd init function-----------------------//
void lcdinit()
{
sendcom(0x3F);
sendcom(0x3F);
sendcom(0x3F);
sendcom(0x3B);
sendcom(0x08);
sendcom(0x01);
sendcom(0x02);
sendcom(0x0C);
sendcom(0x06);
}
//---------- Function to send command to lcd ----------------------//
void sendcom(char comm)
{
TRISD=0x00;
PORTC=0x04; // for command rs=0 rw=0 and
en=1(00000100)
PORTD=comm;
PORTC=0x00; //(00000000)
busy();
return;
}
//--------- Function To Check Whether The Lcd Is Busy -------------//
void busy()
{
TRISD=0x80;
PORTC =0x06; //00000110 for busy rs=0 rw=1
en=1
_asm
back2:
BTFSC PORTD,7;
goto back2;
_endasm;
PORTC = 0x00; //0x02
return;
}
//---------//--------- Function To Send Data To Lcd
------------------------//
void senddata(int dat)
{
TRISD=0x00;
PORTC=0x05; //for data rs=1 rw=0 en=1
(00000101)
PORTD=dat;
PORTC=0x01;
busy();
return;
}
//--------------------------Delay1----------------------------------//
void delay1()
{
TMR0=0xF0;
RP0=1;
PSA=0;
PS1=0;
T0CS=0;
RP0=0;
_asm
back3:
BTFSS INTCON,2;
goto back3;
_endasm;
T0IF=0;
RP0=1;
T0CS=1;
RP0=0;
return;
}
//------------------------------Delay2---------------------//
void delay2()
{
TMR1ON=1;
TMR1H=0x09;
TMR1L=0x00;
T1CKPS0=1;
T1CKPS1=1;
TMR1CS=0;
_asm
back4:
BTFSS PIR1,0;
goto back4;
_endasm;
TMR1IF=0;
TMR1ON=0;
return;
}
//-------------------------Init A/D convertion-------------------//
void adcinit()
{
ADCON1=0x84;
ADON=1;
ADCS1=1;
ADCS0=0;
return;
}
//------------------------Channel select------------------------//
void chselect()
{
sendcom(0x80);
senddata(0x43);
senddata(0x48);
senddata(0x30);
senddata(0x3A);
CHS2=0;
CHS1=0;
CHS0=0;
adc();
delay1();
sendcom(0xC0);
senddata(0x43);
senddata(0x48);
senddata(0x31);
senddata(0x3A);
CHS2=0;
CHS1=0;
CHS0=1;
adc();
delay1();
}
//------------------------Reading Data--------------------------//
void adc()
{
//ADCON0=0xA1;
delay1();
GO=1;
_asm
BACK1:
BTFSC ADCON0,2;
goto BACK1;
_endasm;
ADIF=0;
mask();
multiply();
return;
}
//----------------------Convertion Of the Data---------------------//
void mask()
{
value= ADRESH; //Getting the first digit
value=value&0x03;
value1=value;
value=ADRESL; //Getting the second digit
value=value&0xF0;//swap is not included
value1=value1*0x100+value;
value=ADRESL; //Getting the second digit
value=value&0x0F;
value1=value1+value;
return;
}
void multiply()
{
// value1=0x00A;
value2=value1*0.00488758;
//-------First digit--------------------//
sprintf(str,"%f",value2);
for(i=0;i<strlen(str);i++)
{
val=str[i];
senddata(val);
}
return;
}
When i compiled the above program using sdcc
sdcc --debug -mpic14 -p16f877 progname.c
or
sdcc -mpic14 -p16f877 -I/usr/local/share/sdcc/include -L
/usr/local/share/sdcc/lib/ progname.c
or
sdcc -mpic14 -p16f877 progname.c
I get the following error in all the above case.
message: using default linker script "/usr/share/gputils/lkr/16f877.lkr"
error: missing definition for symbol "_strlen", required by "modiadc2lcd.o"
error: missing definition for symbol "_sprintf", required by "modiadc2lcd.o"
and the hex file is not generated asm and other codes are generated
plz help me to solve this.
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