Clever code... Thanks
I was trying something like that but don't know how to use the counter
in TMR1, this a huge improve in my work.
Coding now... I'm thinking on a simple lib for counting pulses using
this schema... hummm
Coding.. coding...
El 28/07/13 11:48, Sunish Issac escribió:
Here's a basic frequency counter which I used to test the 32khz
frequency while testing RTC chips. seemed to be reasonably accurate.
Wanted to put as a sample in jallib .
Sunish
On Sun, Jul 28, 2013 at 7:29 PM, Ing. Pavel Milanes Costa
<[email protected] <mailto:[email protected]>> wrote:
Hi vasile
I will be glad to see your code, I will wait for you to search it in
the office.
In the mean time, I will be researching for the idea Eurvan give to
me...
cheers.
El 28/07/13 02:24, vasile surducan escribió:
Hi Pavel,
There is an example on jallist, I've search for my own version in my
computer but it seems I have it only in my office (I hope). The
example
is using TMR0, it works ok with 4MHz oscillator but is able to count
only up to 20KHz with two decimals. I have it in two versions,
one with
LED display and the other with LCD disply, none of them jallib
compatible.
However, if you want 50MHz count with PIC I'm afraid you'll need
some
assembler too...
Vasile
On Sun, Jul 28, 2013 at 5:41 AM, Ing. Pavel Milanes Costa
<[email protected] <mailto:[email protected]>
<mailto:[email protected] <mailto:[email protected]>>> wrote:
Hi all.
I'm here reading and searching but I can't find a way of
counting
asynchronous TTL pulses with jal/jallib over a given time
slot...
It must be done with the timer module of the pic... (I
think...)
I explain:
I want to make a frequency counter for zero to 250 Mhz, with 2
external prescaler, using direct counting for low freq's, med
prescaler to about 50 Mhz and a dedicated prescaler for
above 50 Mhz
- 250 Mhz+
But I have not a clue how to use the timer1 as an
asynconous 16 bit
pulse counter of the PIC16F88 I have for the project.
Output will be to a cheap 4bit LCD or UART serial to a PC,
click
will be HS 20 Mhz XTAL...
Other candidate is a PIC16F628 in my junkbox.
Math is not a problem when I can say something like:
<pseudo-code>
a = count(pin_b1,100) -- count pulses on pin B1 for 100ms
</pseudo-code>
Any clue, sample code or tip is welcomed.
73 de CO7WT, Pavel in Cuba Island.
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