Timing question
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Posts: 46,084
I am working on a race timer that must have a resolution to the millisecond.
Total elapsed time may range from 16 seconds to 40 or so seconds. Lap times
will be around 4 - 7 seconds. Accuracy must be +/- 3 ms. My chosen
microcontroller is the OOPic.
Should I just use the internal clock/counter function, or is there a
peripheral chip that would do a better job in this application. The OOPic
runs at 5Mhz - anyone know what the accuracy/stability of the clock is?
Thanks!
Michael Clark Phone: (919) 468-9901 ext. 101
IVC, Inc. mdc@i...
Total elapsed time may range from 16 seconds to 40 or so seconds. Lap times
will be around 4 - 7 seconds. Accuracy must be +/- 3 ms. My chosen
microcontroller is the OOPic.
Should I just use the internal clock/counter function, or is there a
peripheral chip that would do a better job in this application. The OOPic
runs at 5Mhz - anyone know what the accuracy/stability of the clock is?
Thanks!
Michael Clark Phone: (919) 468-9901 ext. 101
IVC, Inc. mdc@i...
Comments
Since your question is about the Oopic, you may want to
send it to the Oopic e-group. The email address is
oopic@yahoogroups.com. You will probably get better
support there.
Dave
--- Michael Clark <mdc@i...> wrote:
> I am working on a race timer that must have a resolution
> to the millisecond.
> Total elapsed time may range from 16 seconds to 40 or so
> seconds. Lap times
> will be around 4 - 7 seconds. Accuracy must be +/- 3 ms.
> My chosen
> microcontroller is the OOPic.
>
> Should I just use the internal clock/counter function, or
> is there a
> peripheral chip that would do a better job in this
> application. The OOPic
> runs at 5Mhz - anyone know what the accuracy/stability of
> the clock is?
>
> Thanks!
>
>
> Michael Clark Phone: (919) 468-9901
> ext. 101
> IVC, Inc. mdc@i...
>
>
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
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this question is generic enough that I could get answers here. After all,
we are talking about a PIC in either case.
Michael Clark Phone: (919) 468-9901 ext. 101
IVC, Inc. mdc@i...
>
Original Message
> From: david cousins [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=HN0Kn0ebxZB0UeOzmXhYAbtRq9oTfJw3grx5rx6UyWM_pi3WBkyhV0Sn2m56c1dKToTC6eVWG4wydog]cuz_hsv@y...[/url
> Sent: Wednesday, May 09, 2001 10:13 AM
> To: basicstamps@yahoogroups.com
> Subject: Re: [noparse][[/noparse]basicstamps] Timing question
>
>
> Hi Michael,
> Since your question is about the Oopic, you may want to
> send it to the Oopic e-group. The email address is
> oopic@yahoogroups.com. You will probably get better
> support there.
> Dave
>
as a variable if the'wait' specification is met, 'serout' the variable to
an lcd, then look for another 'serin' to match another 'wait'
specification. How long would it take between each 'serin'. I want to
make sure I have enough time if two serial inputs are recieved in a short
amount of time. Thanks,