karthickiw
Joined: 09 Aug 2007
Posts: 82
Location: TN, India
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| problem in proximity sensor signal detection... |
 Posted: Wed Nov 21, 2007 8:51 pm |
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hai,
i count the proximity sensor data.. i connect the seven segment
(A point) and proximity output in same pin RB7. i write the external interrupt to read the proximity data that time i configure the port as input port.. and then configure the port as output port and display the count data in seven segment. but program is count three times only.... my program is show below...
i used RB0 for other interrupt...
| Code: | #include<16f873a.h>
#include<math.h>
#use delay(clock=20000000)
#fuses NOWDT,HS, NOPUT, NOPROTECT, NODEBUG, BROWNOUT, NOLVP, NOCPD, NOWRT
#byte port_b=6
int CONST LED_MAP[10] = {0xfc,0x60,0xda,0xf2,0x66,0xb6,0xbe,0xe0,0xfe,0xe6};
#define LOWTOHIGH TRUE
#define HIGHTOLOW FALSE
long int count=0;
long int d1,d2,d3,d4;
short int dbutton7;
int last1=0;
int current;
void display(long int a1) // display function for segment LED
{
set_tris_b(0x01); //set RB0- Input and other are output...
//delay_ms(20);
d1=a1/1000; //separate four digits
d2=(a1-1000*d1)/100;
d3=(a1-1000*d1-100*d2)/10;
d4=(a1-1000*d1-100*d2-10*d3);
output_high(pin_c4);
port_b= LED_MAP[d1];
delay_ms(1);
output_low(pin_c4);
output_high(pin_c5);
port_b= LED_MAP[d2];
delay_ms(1);
output_low(pin_c5);
output_high(pin_c6);
port_b= LED_MAP[d3];
delay_ms(1);
output_low(pin_c6);
output_high(pin_c7);
port_b= LED_MAP[d4];
delay_ms(1);
output_low(pin_c7);
last1=current;
set_tris_b(0x81); // set RB7 and RB0 are input and other are output..
}
#int_rb
void detect_rb_change() {
static int last=0;
set_tris_b(0x81);
current=input_b();
if ((!bit_test(last,7))&&(bit_test(current,7))) {dbutton7=1;}
last=current;
}
void main() {
dbutton7=0;
enable_interrupts(INT_RB);
enable_interrupts(GLOBAL);
output_low(PIN_a0);
while (TRUE) {
display(count);
if(dbutton7)
{
count=count+1;
dbutton7=FALSE;
}
if ( count>=9999) count=0;
}
}
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