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I have a problem with reading data from it. And just wondering is't code problem ore circuit. I used normal power mode for ds18b20 and allways getting 0 value from it. i used 4k7 pullup rsistor as wri ...

#include <16F877a.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
//#fuses XT,NOPUT,NOPROTECT,NOBROWNOUT,NOLVP,NOWDT
#use delay(clock=20000000)
#include <stdlib.h>
#include <lcd.c&g ...

So is it possible to count how much time passed between timer start and stop? Converting result in seconds? Or counting frequency?

Maybe someone have used it and is it working simple as 4 outputs with logical 1 or 0 value?

Yes I was thinking about this but so far the problem is not in hardware design. The problem is all about timer1. I still can't find the problem why I can't get 1 second when I'm using 1 Hz in input si ...

Can anyone tell me why can't I get seconds in LCD getting numbers from 500 to 11000?
do {

wait_for_low1();
set_timer1(0);
wait_for_low2();
...

int1 0 to 1

int8 0 to 255; -128 to 127

int16 0 to 65535; -32768 to 32767

int32 0 to 4294967295; -2147483648 to 2147483647

float32 -1.5 x 1045 to 3.4 x 1038

I was thinking about that and yes it's redone code from examples because i need to count from low to low input.
void wait_for_low1() {

while(input(PIN_C1)); ...

I'am new in C so maby can you show in code? Ore some example

So I'm using IR and phototransistor and writing a program to count the wind speed. Counting process is simple detecting first low input and then second. Then getting result and of the time distance is ...

Thx for help. I solved the problem if some one needs working code of pic16f877a and ds18b20 pm me Smile

Yea and i changed back to original code. from signed int16 to float for result

Yep :(

It was mistype but it wont change a lot still getting 0 value.