Search found 55 matches

thank you pcm

I had already found that post here on the forums but I it works the same way get_timer does, at least I tried changing time and the frequency gets affected.

any way to do it without ccp1? I really want to test this on 12F675 before the 16f88 arrives Smile

One thing to be careful of with the "reciprocal" version - depending on the engine you might get strange results for RPM - my old Buick V-6 was basically a V-8 engine with 2 cylinders remove ...

You guys must be teachers.

So back to code (sorry for the bad coding :P)

Slow counting method:
set_timer1(0);
delay_ms(1000);
freq=get_timer1();

Reciprocal method: ...

First of all thank you all for your help.

So, as I understand what you guys say is to do a loop, cycling for the most possible frequency thatIi want to read?
I saw some code here in the forums and ...

Thank you for your answer.

My frequencies are from 20hz to 300hz.

I think the edges are pretty sharp, its from a distributor hall sensor (12v).

Hello, I've build a rpm/freq meter, but since frequency is measured over a second my update rate is very low, stucking the program until 1s has passed.

I'm using the following code:

set_timer1&# ...

OK since I like to simplify it all.

#include <16F628A.h>
#fuses INTRC_IO, NOWDT, NOPUT, NOBROWNOUT, NOMCLR, NOLVP, NOPROTECT
#use delay (clock=4000000)

#use rs232(baud=1200,r ...

OMG PCM it worked just with the simplest code.

#include <16F628A.h>
#fuses INTRC_IO, NOWDT, NOPUT, NOBROWNOUT, NOMCLR, NOLVP, NOPROTECT
#use delay (clock=4000000)

#use rs232( ...

Remember at the beginning i had no LEDS but ok.. Since i hate using resistors ill remove all the LEDs and just printf something instead.

About the quotes I tryed to make different ways of comparing ...

Receiver code:
#include <16F628A.h>
#fuses INTRC_IO, NOWDT, NOPUT, NOBROWNOUT, NOMCLR, NOLVP, NOPROTECT
#use delay (clock=4000000)

//#use rs232(baud=2400,xmit=PIN_B5, rcv=PIN_B ...

Ttelmah I had the max just disconnected it and used INVERT for testing. I also made a small PCB with max232 and caps.

PCM I had the 0x00 being add in the TX code but removed it since i did not noti ...

Thought on strcmp ill try it when i get home.

I changed the program to:

int data[1];
data[0]=getc();

printf("data: %s\n", data);

My output ...

Tried, no luck.

I think my problem is that data is getting more characters then just the U, I can't compare it because it tries to compare the whole string.

I think my solution is store it in a ...

PIC is 16F628A, I would do it in 16F88 which I think it has a better support for rs232 communications, but looks like my programmer (JDM) can't get the right voltages trough serial port causing my des ...