Newbie timer problem...

[John]

Hello experts!
I'm trying to get a 16F84 to count external pulses but it doesn't work even though it compiles ok with my PCM 2.686.
The idea was to start the timer, set it to 0 and wait for some ms as is counts and get the readout to a LCD. Then resetting it again and so on. The LCD routine is ok but I the timer doesn't seem to react?
I've connected the pulse source to Rb0 and set it as:

set_tris_b ( 0xF9 ); // 0b11111001

The main code looks something like this:
void main( void )
{
int count;
setup_counters(RTCC_EXT_L_TO_H, WDT_2304MS);
enable_interrupts(INT_EXT);
enable_interrupts(GLOBAL);
while(1)
{
set_rtcc(0);
delay_ms(100);
count=get_rtcc();
printf(LCD_PutChar,"\%3U",count);
delay_ms(500);
}
}
What am I doing wrong? I've looked for answers everywhere but to no avail. I don't use an ISR, is that necessary?
Thanks in advance!
/John
___________________________
This message was ported from CCS's old forum
Original Post ID: 9734

[PCM programmer]

:=Hello experts!
:=I'm trying to get a 16F84 to count external pulses but it doesn't work even though it compiles ok with my PCM 2.686.
:=The idea was to start the timer, set it to 0 and wait for some ms as is counts and get the readout to a LCD. Then resetting it again and so on. The LCD routine is ok but I the timer doesn't seem to react?
---------------------------------------------------------

For an example of how to use the RTCC, see the CCS example
file, "EX_PULSE.C". This is in your C:\PICC\Examples folder.

Here is an example of how to use INT_EXT to count inputs on RB0.
<a href="http://www.pic-c.com/forum/general/posts/2138.html" TARGET="_blank">http://www.pic-c.com/forum/general/posts/2138.html</a>
___________________________
This message was ported from CCS's old forum
Original Post ID: 9740

[John]

:=:=Hello experts!
:=:=I'm trying to get a 16F84 to count external pulses but it doesn't work even though it compiles ok with my PCM 2.686.
:=:=The idea was to start the timer, set it to 0 and wait for some ms as is counts and get the readout to a LCD. Then resetting it again and so on. The LCD routine is ok but I the timer doesn't seem to react?
:=---------------------------------------------------------
:=
:=For an example of how to use the RTCC, see the CCS example
:=file, "EX_PULSE.C". This is in your C:\PICC\Examples folder.
:=
:=Here is an example of how to use INT_EXT to count inputs on RB0.
:= <a href="http://www.pic-c.com/forum/general/posts/2138.html" TARGET="_blank"> <a href="http://www.pic-c.com/forum/general/posts/2138.html" TARGET="_blank">http://www.pic-c.com/forum/general/posts/2138.html</a></a>

Thanks for the links even though I was hoping for a more "direct answer" of what I did wrong ;-) But finally I got it up and running!
Thanks again,
/John
___________________________
This message was ported from CCS's old forum
Original Post ID: 9780