ieda
Newbie level 3
hi! can someone help me... i want to display the heart beat on 7 segment display using PIC 16F877..the counter will reset every 60 seconds. and if the counts exceed for example 80, the alam will on... each 7segment display from 0 to 9
my question are:
1)I hv problem on how to display 3 digits..unit -->tens-->hundreds ( my display part)
2) as u can see, i can't organize my coding very well... i dun really understand the c -code format. i dun know how to call my display into my main program..i try but..
in other word, i dun know how to write to make my programmes flow correctly.
3) to detect my sensor :
if (PORTA.F4 ==1) // connect port A to sensor
{
counter =0;
while (1) {
// then i dun know how to 'connect' this part with my display part and my main part
3) i set the timer to reset the counter every 60 seconds, but my lec ask me to just count for 15 seconds and then multiply it by 4..how can i change my programmes
**i already defined all the 7segment interface**
}
maybe someone can post any site that can help me with this..example..anything..i look at quite many examples, but still dun fully understand...so, i start by doing it part by part.. i'm sorry if this probs only a 'small' prob with u guys...but i already make some effort to do it myself, but still can;t do it correctly... sorry for my eng...
my question are:
1)I hv problem on how to display 3 digits..unit -->tens-->hundreds ( my display part)
2) as u can see, i can't organize my coding very well... i dun really understand the c -code format. i dun know how to call my display into my main program..i try but..
in other word, i dun know how to write to make my programmes flow correctly.
3) to detect my sensor :
if (PORTA.F4 ==1) // connect port A to sensor
{
counter =0;
while (1) {
// then i dun know how to 'connect' this part with my display part and my main part
3) i set the timer to reset the counter every 60 seconds, but my lec ask me to just count for 15 seconds and then multiply it by 4..how can i change my programmes
**i already defined all the 7segment interface**
}
Code:
void main(void){
TRISA=0xFF; // PORT A as input
TRISB=0; // PORT B and PORT D as output
TRISD=0;
TMR1H= 0xFB;
TMR1L= 0x1D;
TICON =0b00101001 //enable Timer 1
PIR1.TMR1IF=0; // Clear timer 1 interrupt flag
PIE1.TMR1IE=1; // Enable timer 1 interrupt
INTCON.GIE=1; //Enable peripheril interrupt
//for display part
void display() {
if (counter<10);
{
case0 ;
display_port = 0b00000011;
break;
case1;
display_port = 0b10011111;
break:
.
.
.
.// till case9
}
}
void interrupt() {
if(PIR1.TMR1IF)
{
counter++;
TMR1H= 0xFB;
TMR1L= 0x1D;
PIR1.TMR1IF=0;
}
}
void alarm() {
if (counter >80);
PORTD.F2 = 1;
delay_ms(1000);
PORTD.F2 = 0;
}maybe someone can post any site that can help me with this..example..anything..i look at quite many examples, but still dun fully understand...so, i start by doing it part by part.. i'm sorry if this probs only a 'small' prob with u guys...but i already make some effort to do it myself, but still can;t do it correctly... sorry for my eng...
