version 1.1, 2005/08/26 00:36:53
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version 1.3, 2005/08/29 14:22:27
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#!/usr/bin/wish |
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############################################################## |
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# Global flags and variables |
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############################################################## |
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# Flags |
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set waiting_for_key 0 |
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set question_asked 0 |
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set timer_started 0 |
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# Channel to talk to the MRC device |
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set MRC 0 |
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# Mapping of MCR codes to keys: button(code) |
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set buttoncode 256 |
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for {set i 1} {$i <=8} {incr i} { |
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set button($buttoncode) $i |
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set buttoncode [expr $buttoncode*2] |
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} |
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############################################################## |
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# Procedures for talking with MRC |
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############################################################## |
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# Open the given device for MRC. Return 0 if successful, 1 otherwise |
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proc open_mrc {device} { |
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global MRC |
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set result [catch {set MRC [open $device r+]}] |
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if {$result !=0} { |
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return $result |
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} |
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fconfigure $MRC -blocking 0 -translation binary \ |
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-encoding binary -buffering none -mode 57600,n,8,1 |
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puts $MRC s |
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after 200 |
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read $MRC |
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puts $MRC r |
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after 200 |
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read $MRC |
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return 0 |
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} |
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# Return the key pressed or 0 |
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proc readbuffer {} { |
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global MRC button |
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set key 0 |
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set message [read $MRC] |
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binary scan $message s key |
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set key [expr $key & 0xFFFF] |
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if {[catch {set key $button($key)}] == 0} { |
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return $key |
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} |
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return 0 |
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} |
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############################################################## |
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# Setup |
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############################################################## |
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button .start -text "Start" -command start |
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pack .start |
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label .pressed |
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pack .pressed |
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proc start {} { |
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global SRLFILE state idle waiting |
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readbuffer |
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.start configure -state disabled -command {} |
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set state $waiting |
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} |
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proc body {} { |
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global state idle waiting |
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update idletasks |
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if { $state == $waiting } { |
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set pressed [readbuffer] |
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if { $pressed != 0 } { |
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# set state $idle |
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# .start configure -state active -command start |
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.pressed configure -text "Pressed $pressed" |
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puts $pressed |
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readbuffer } |
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} else { |
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readbuffer |
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} |
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after 10 body |
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} |
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body |
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