ravindrareddy2131
Newbie level 4
![Newbie level 4](/styles/images/ranks/blevel1.gif)
hi everyone,
i am interfacing temperature sensor to AN0 and humidity sensor to AN1 inputs of P18F4550 microcontroller. i had written the program in MPLAB IDE. am getting only humidity value in hyperterminal but the temperature loop is not executing. Here is my program. could any one please help me..thank you
#include<p18f4550.h>
#include<usart.h>
#include<delays.h>
#pragma config FOSC=HS
#pragma config BOR=OFF
#pragma config PWRT=OFF
#pragma config WDT=OFF, DEBUG=OFF
#pragma config LVP=OFF
#pragma config MCLRE=ON
#pragma config PBADEN=OFF
#pragma config ICPRT=OFF
void sertx(unsigned int);
void MSDelay (unsigned int);
void chk_ISR(void);
void INT0_ISR(void);
#pragma interrupt chk_ISR
void chk_ISR(void)
{
if(INTCONbits.INT0IF==1)
INT0_ISR();
}
#pragma myhipri_int=0x08;
void myhipri_int(void)
{
_asm
goto chk_ISR
_endasm
}
#pragma code
void main(void)
{
unsigned char LB,HB,BT,T1,T2;
TRISC=0;
TRISD=0;
ADCON0=0x09;
ADCON1=0x45;
TRISBbits.TRISB0=1;
TRISCbits.TRISC6=0;
TXSTA=0x20;
SPBRG=31;
TXSTAbits.TXEN=1;
RCSTAbits.SPEN=1;
INTCONbits.INT0IF=0;
INTCONbits.INT0IE=1;
INTCONbits.GIE=1;
while(1)
{
ADCON0bits.GO=1;
while(ADCON0bits.DONE==1)
LB=ADRESL;
HB=ADRESH;
BT=HB;
H1=(BT/10)+48;
H2=(BT%10)+48;
sertx('H');
sertx('M');
sertx('D');
sertx('T');
sertx('Y');
sertx(H1);
sertx(H2);
MSDelay(250);
}
}
void INT0_ISR(void)
{
unsigned char LB,HB,HD,H1,H2;
ADCON0=0x01;
ADCON1=0x45;
while(1)
{
ADCON0bits.GO=1;
while(ADCON0bits.DONE==1)
LB=ADRESL;
HB=ADRESH;
HD=HB;
T1=(HD/10)+48;
T2=(HD%10)+48;
sertx('T');
sertx('E');
sertx('M');
sertx('p');
sertx(T1);
sertx(T2);
INTCONbits.INT0IF=0;
}
}
void sertx(unsigned int C)
{
while(PIR1bits.TXIF==0);
TXREG=C;
}
void MSDelay (unsigned int itime)
{
unsigned int i;
unsigned int j;
for(i=0;i<itime;i++)
for(j=0;j<135;j++);
}
i am interfacing temperature sensor to AN0 and humidity sensor to AN1 inputs of P18F4550 microcontroller. i had written the program in MPLAB IDE. am getting only humidity value in hyperterminal but the temperature loop is not executing. Here is my program. could any one please help me..thank you
#include<p18f4550.h>
#include<usart.h>
#include<delays.h>
#pragma config FOSC=HS
#pragma config BOR=OFF
#pragma config PWRT=OFF
#pragma config WDT=OFF, DEBUG=OFF
#pragma config LVP=OFF
#pragma config MCLRE=ON
#pragma config PBADEN=OFF
#pragma config ICPRT=OFF
void sertx(unsigned int);
void MSDelay (unsigned int);
void chk_ISR(void);
void INT0_ISR(void);
#pragma interrupt chk_ISR
void chk_ISR(void)
{
if(INTCONbits.INT0IF==1)
INT0_ISR();
}
#pragma myhipri_int=0x08;
void myhipri_int(void)
{
_asm
goto chk_ISR
_endasm
}
#pragma code
void main(void)
{
unsigned char LB,HB,BT,T1,T2;
TRISC=0;
TRISD=0;
ADCON0=0x09;
ADCON1=0x45;
TRISBbits.TRISB0=1;
TRISCbits.TRISC6=0;
TXSTA=0x20;
SPBRG=31;
TXSTAbits.TXEN=1;
RCSTAbits.SPEN=1;
INTCONbits.INT0IF=0;
INTCONbits.INT0IE=1;
INTCONbits.GIE=1;
while(1)
{
ADCON0bits.GO=1;
while(ADCON0bits.DONE==1)
LB=ADRESL;
HB=ADRESH;
BT=HB;
H1=(BT/10)+48;
H2=(BT%10)+48;
sertx('H');
sertx('M');
sertx('D');
sertx('T');
sertx('Y');
sertx(H1);
sertx(H2);
MSDelay(250);
}
}
void INT0_ISR(void)
{
unsigned char LB,HB,HD,H1,H2;
ADCON0=0x01;
ADCON1=0x45;
while(1)
{
ADCON0bits.GO=1;
while(ADCON0bits.DONE==1)
LB=ADRESL;
HB=ADRESH;
HD=HB;
T1=(HD/10)+48;
T2=(HD%10)+48;
sertx('T');
sertx('E');
sertx('M');
sertx('p');
sertx(T1);
sertx(T2);
INTCONbits.INT0IF=0;
}
}
void sertx(unsigned int C)
{
while(PIR1bits.TXIF==0);
TXREG=C;
}
void MSDelay (unsigned int itime)
{
unsigned int i;
unsigned int j;
for(i=0;i<itime;i++)
for(j=0;j<135;j++);
}