take your pulse

From	Paul Rubin <no.email@nospam.invalid>
Newsgroups	comp.lang.forth
Subject	take your pulse
Date	2016-09-29 15:28 -0700
Organization	A noiseless patient Spider
Message-ID	<87h98y49z7.fsf@jester.gateway.pace.com> (permalink)

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Just wrote this to take my pulse before and after exercising.  Not
impressive at all, but hey, it's an actual Forth application and we
don't get many of those here ;-).

Usage: 
1. run the program
2. put your finger on your pulse (wrist or whatever)
3. hit a key to start timing (space bar works)
4. Count pulse beats for a while (I've been counting to 20)
5. hit a key to stop timing
6. Enter number of beats you counted.  Pulse in bpm is shown.

There's no error checking.  It's probably a monstrous security
vulnerability to connect this program to an open internet port, so
don't do that ;-).  Tested with gforth but should port easily
given a utime primitive (measure time in microseconds).
================================================================
#! /usr/bin/gforth
: interval ( -- f )			  \ measure interval in seconds
    ." hit a key to start" cr key drop utime
    ." hit a key to stop" cr key drop utime
    2swap d- d>f 1e-6 f* ;
: readnum ( -- f ) pad 80 accept >r 0 0 pad r> >number 2drop d>f ;
: get-count ( -- f ) ." enter pulse count: " readnum ;
: go interval fdup f. ." sec " cr
    get-count 60e f* fswap f/ f. ." bpm" cr ;

go bye
================================================================

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take your pulse Paul Rubin <no.email@nospam.invalid> - 2016-09-29 15:28 -0700
  Re: take your pulse Lars Brinkhoff <lars.spam@nocrew.org> - 2016-09-30 07:44 +0200
    Re: take your pulse Paul Rubin <no.email@nospam.invalid> - 2016-09-29 22:52 -0700
  Re: take your pulse Ilya Tarasov <ilya74.tarasov@gmail.com> - 2016-09-30 04:42 -0700
    Re: take your pulse Paul Rubin <no.email@nospam.invalid> - 2016-09-30 12:31 -0700
      Re: take your pulse Ilya Tarasov <ilya74.tarasov@gmail.com> - 2016-09-30 14:12 -0700
        Re: take your pulse Ilya Tarasov <ilya74.tarasov@gmail.com> - 2016-09-30 15:17 -0700
          Re: take your pulse Paul Rubin <no.email@nospam.invalid> - 2016-09-30 16:27 -0700
            Re: take your pulse Ilya Tarasov <ilya74.tarasov@gmail.com> - 2016-10-02 16:58 -0700
  Re: take your pulse hughaguilar96@gmail.com - 2016-09-30 19:35 -0700
    Re: take your pulse Julian Fondren <julian.fondren@gmail.com> - 2016-09-30 20:11 -0700

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