source: trunk/MultiChannelUSB/UserInterface.tcl@ 160

package require XOTcl

package require BLT
package require swt
package require usb

package require zlib

wm minsize . 1000 700

namespace eval ::mca {
    namespace import ::xotcl::*

    namespace import ::blt::vector
    namespace import ::blt::graph
    namespace import ::blt::tabnotebook

# -------------------------------------------------------------------------

    variable oscCodes
    array set oscCodes {
        1 {Channel 1}
        2 {Channel 2}
        3 {Channel 3}
        4 {Channel 4}
        5 {Channel 5}
        6 {Trigger}
    }

# -------------------------------------------------------------------------

    variable adcCodes
    array set adcCodes {
        1 {ADC 1}
        2 {ADC 2}
        3 {ADC 3}
    }

# -------------------------------------------------------------------------

    variable inpCodes
    array set inpCodes {
        0 {raw data}
        1 {filtered}
        2 {amplitude}
        3 {amp flag}
    }

# -------------------------------------------------------------------------

    proc validate {max size value} {
        if {![regexp {^[0-9]*$} $value]} {
            return 0
        } elseif {[regexp {^0[0-9]+$} $value]} {
            return 0
        } elseif {$value > $max} {
            return 0
        } elseif {[string length $value] > $size} {
            return 0
        } else {
            return 1
        }
    }

# -------------------------------------------------------------------------

    proc doublevalidate {max value} {
        if {![regexp {^[0-9]{0,2}\.?[0-9]{0,3}$} $value]} {
            return 0
        } elseif {[regexp {^0[0-9]+$} $value]} {
            return 0
        } elseif {$value > $max} {
            return 0
        } else {
            return 1
        }
    }

# -------------------------------------------------------------------------

    proc legendLabel {master row key title} {
        label ${master}.${key}_label -anchor w -text ${title}
        label ${master}.${key}_value -width 10 -anchor e -text {}

        grid ${master}.${key}_label -row ${row} -column 1 -sticky w
        grid ${master}.${key}_value -row ${row} -column 2 -sticky ew
    }

# -------------------------------------------------------------------------

    proc legendButton {master row key title var bg {fg black}} {
        checkbutton ${master}.${key}_check -variable $var
        label ${master}.${key}_label -anchor w -text ${title} -bg ${bg} -fg $fg
        label ${master}.${key}_value -width 10 -anchor e -text {} -bg ${bg} -fg $fg

        grid ${master}.${key}_check -row ${row} -column 0 -sticky w
        grid ${master}.${key}_label -row ${row} -column 1 -sticky w
        grid ${master}.${key}_value -row ${row} -column 2 -sticky ew
    }

# -------------------------------------------------------------------------

    Class UsbController

# -------------------------------------------------------------------------

    UsbController instproc usbConnect {} {
        my instvar handle

        puts usbConnect

        if {[my exists handle]} {
            $handle disconnect
            unset handle
        }
if {1} {
        while {[catch {usb::connect 0x09FB 0x6001 1 1 0} result]} {
            set answer [tk_messageBox -icon error -type retrycancel \
                -message {Cannot access USB device} -detail $result]
#            puts $result
            if {[string equal $answer cancel]} exit
        }

        set handle $result

}
    }

# -------------------------------------------------------------------------

    UsbController instproc usbHandle {} {
        my instvar handle

        if {[my exists handle]} {
            return $handle
        } else {
            my usbConnect
        }
    }

# -------------------------------------------------------------------------

    UsbController instproc usbCmd {command} {
        set code [catch {[my usbHandle] writeRaw [usb::convert $command]} result]
        switch -- $code {
            1 {
#                puts $result
                my usbConnect
            }
        }

    }

# -------------------------------------------------------------------------

    UsbController instproc usbCmdReadRaw {command size data} {
        my usbCmd $command

        set code [catch {[my usbHandle] readRaw $size} result]
        switch -- $code {
            0 {
                set $data $result
            }
            1 {
#                puts $result
                my usbConnect
            }
            5 {
#                puts Busy
            }
        }
    }

# -------------------------------------------------------------------------

    UsbController instproc usbCmdReadRaw {command size data} {
        my usbCmd $command

        set code [catch {[my usbHandle] readRaw $size} result]
        switch -- $code {
            0 {
                set $data $result
            }
            1 {
#                puts $result
                my usbConnect
            }
            5 {
#                puts Busy
            }
        }
    }

# -------------------------------------------------------------------------

    UsbController instproc usbCmdReadHex {command width size data} {
        my usbCmd $command

        set code [catch {[my usbHandle] readHex $width $size} result]
        switch -- $code {
            0 {
                set $data $result
            }
            1 {
#                puts $result
                my usbConnect
            }
            5 {
#                puts Busy
            }
        }
    }

# -------------------------------------------------------------------------

    Class MuxDisplay -parameter {
        {master}
        {controller}
    }

# -------------------------------------------------------------------------

    MuxDisplay instproc init {} {

        my setup

        next
    }

# -------------------------------------------------------------------------

    MuxDisplay instproc destroy {} {
        next
    }

# -------------------------------------------------------------------------

    MuxDisplay instproc start {} {
        my instvar config chan_val

        set chan_val(1) 0
        set chan_val(2) 0
        set chan_val(3) 0
        set chan_val(4) 0
        set chan_val(5) 0
        set chan_val(6) 0

        trace add variable [myvar chan_val] write [myproc chan_val_update]
        trace add variable [myvar polar] write [myproc polar_update]

        $config(1).chan_1_1 select
        $config(2).chan_1_2 select
        $config(3).chan_1_3 select
        $config(4).chan_1_1 select
        $config(5).chan_3_1 select
        $config(6).chan_3_1 select

        for {set i 1} {$i <= 3} {incr i} {
          $config(7).polar$i select
        }
    }

# -------------------------------------------------------------------------

    MuxDisplay instproc setup {} {
        variable oscCodes
        variable adcCodes
        variable inpCodes
        my instvar master
        my instvar config

        set size [array size inpCodes]
        set oscList [array get oscCodes]
        set adcList [array get adcCodes]
        set inpList [array get inpCodes]

        foreach {osc title} $oscList {
            set config($osc) [labelframe ${master}.mux_$osc -borderwidth 1 -relief sunken -text $title]

            foreach {ch dummy} $adcList {
                label $config($osc).chan_${ch} -text "#$ch "
                grid $config($osc).chan_${ch} -row 0 -column $ch -sticky w
            }
            foreach {code input} $inpList {
                set row [expr {$code + 1}]
                set last 0
                foreach {ch dummy} $adcList {
                    set value [expr {$size * ($ch - 1) + $code}]
                    radiobutton $config($osc).chan_${code}_${ch} -variable [myvar chan_val($osc)] -value ${value}
                    grid $config($osc).chan_${code}_${ch} -row ${row} -column $ch -sticky w
                    set last $ch
                }
                $config($osc).chan_${code}_${last} configure -text $input
            }
            set column [expr {($osc - 1) % 3}]
            set row [expr {($osc - 1) / 3 * 2 + 1}]
            grid $config($osc) -row $row -column $column -sticky news -padx 10
        }

        set config(7) [labelframe ${master}.mux_8 -borderwidth 1 -relief sunken -text {polarity inversion}]
        for {set i 1} {$i <= 3} {incr i} {
          checkbutton $config(7).polar$i -text "ADC $i" -variable [myvar polar($i)]
          grid ${config(7)}.polar$i
        }
        grid $config(7) -row 2 -column 3 -sticky news -padx 10

        grid columnconfigure ${master} 0 -weight 1
        grid columnconfigure ${master} 1 -weight 1
        grid columnconfigure ${master} 2 -weight 1
        grid columnconfigure ${master} 3 -weight 1

        grid rowconfigure ${master} 0 -weight 1
        grid rowconfigure ${master} 1 -weight 0
        grid rowconfigure ${master} 2 -weight 0
        grid rowconfigure ${master} 3 -weight 0
        grid rowconfigure ${master} 4 -weight 1

    }


# ------------------------------------------------------------------------

    MuxDisplay instproc chan_val_update args {
        my instvar controller chan_val

        set byte1 [format {%02x%02x} $chan_val(2) $chan_val(1)]
        set byte2 [format {%02x%02x} $chan_val(4) $chan_val(3)]
        set byte3 [format {%02x%02x} $chan_val(6) $chan_val(5)]

        $controller usbCmd 000200020004${byte1}000200030004${byte2}000200040004${byte3}
    }

# -------------------------------------------------------------------------

    MuxDisplay instproc polar_update args {
        my instvar controller polar

        set value [format {%x%x%x} $polar(3) $polar(2) $polar(1)]

        $controller usbCmd 0002000100040${value}
    }

# -------------------------------------------------------------------------

    Class HstDisplay -parameter {
        {number}
        {master}
        {controller}
    }

# -------------------------------------------------------------------------

    HstDisplay instproc init {} {

        my set data {}

        vector create [myvar xvec](4096)
        vector create [myvar yvec](4096)

        # fill one vector for the x axis with 4096 points
        [myvar xvec] seq -0.5 4095.5

        my setup

        next
    }

# -------------------------------------------------------------------------

    HstDisplay instproc destroy {} {
        next
    }

# -------------------------------------------------------------------------

    HstDisplay instproc start {} {
        my instvar config

        trace add variable [myvar data] write [myproc data_update]
        trace add variable [myvar cntr_val] write [myproc cntr_val_update]
        trace add variable [myvar rate_val] write [myproc rate_val_update]

        trace add variable [myvar axis] write [myproc axis_update]
        trace add variable [myvar thrs] write [myproc thrs_update]
        trace add variable [myvar thrs_val] write [myproc thrs_update]

        ${config}.axis_check select

        ${config}.thrs_check select
        ${config}.thrs_field set 25

        set cntr_tmp 1200000000
        my set cntr_val $cntr_tmp
        my set cntr_bak $cntr_tmp
        my set cntr_old $cntr_tmp
        my set yvec_bak 0.0
        my set yvec_old 0.0

        my set rate_val(inst) 0.0
        my set rate_val(mean) 0.0

#        my cntr_reset
    }

# -------------------------------------------------------------------------

    HstDisplay instproc setup {} {
        my instvar number master
        my instvar xvec yvec graph
        my instvar config thrs thrs_val
        my instvar cntr_h cntr_m cntr_s

        # create a graph widget and show a grid
        set graph [graph ${master}.graph -height 250 -leftmargin 80]
        $graph crosshairs configure -hide no -linewidth 1 -color darkblue -dashes {2 2}
        $graph grid configure -hide no
        $graph legend configure -hide yes
        $graph axis configure x -min 0 -max 4096

        set config [frame ${master}.config -width 170]

        checkbutton ${config}.axis_check -text {log scale} -variable [myvar axis]

        frame ${config}.spc1 -width 170 -height 30

        frame ${config}.rate_frame -borderwidth 0 -width 170
        legendLabel ${config}.rate_frame 0 inst {Inst. rate, 1/s}
        legendLabel ${config}.rate_frame 1 mean {Avg. rate, 1/s}

        frame ${config}.spc2 -width 170 -height 30

        frame ${config}.chan_frame -borderwidth 0 -width 170
        legendLabel ${config}.chan_frame 0 entr  {Total entries}
        legendLabel ${config}.chan_frame 1 empty {}
        legendLabel ${config}.chan_frame 2 axisy {Bin entries}
        legendLabel ${config}.chan_frame 3 axisx {Bin number}

        frame ${config}.spc3 -width 170 -height 30

        checkbutton ${config}.thrs_check -text {amplitude threshold} -variable [myvar thrs]
        spinbox ${config}.thrs_field -from 1 -to 4095 \
            -increment 5 -width 10 -textvariable [myvar thrs_val] \
            -validate all -vcmd {::mca::validate 4095 4 %P}

        frame ${config}.spc4 -width 170 -height 30

        label ${config}.cntr -text {time of exposure}
        frame ${config}.cntr_frame -borderwidth 0 -width 170

        label ${config}.cntr_frame.h -width 3 -anchor w -text {h}
        entry ${config}.cntr_frame.h_field -width 3 -textvariable [myvar cntr_h] \
            -validate all -vcmd {::mca::validate 999 3 %P}
        label ${config}.cntr_frame.m -width 3 -anchor w -text {m}
        entry ${config}.cntr_frame.m_field -width 3 -textvariable [myvar cntr_m] \
            -validate all -vcmd {::mca::validate 59 2 %P}
        label ${config}.cntr_frame.s -width 3 -anchor w -text {s}
        entry ${config}.cntr_frame.s_field -width 6 -textvariable [myvar cntr_s] \
            -validate all -vcmd {::mca::doublevalidate 59.999 %P}

        grid ${config}.cntr_frame.h_field ${config}.cntr_frame.h \
            ${config}.cntr_frame.m_field ${config}.cntr_frame.m ${config}.cntr_frame.s_field ${config}.cntr_frame.s

        frame ${config}.spc5 -width 170 -height 10

        button ${config}.start -text Start \
            -bg yellow -activebackground yellow -command [myproc cntr_start]
        button ${config}.reset -text Reset \
            -bg red -activebackground red -command [myproc cntr_reset]

        frame ${config}.spc6 -width 170 -height 30


        button ${config}.register -text Register \
            -bg lightblue -activebackground lightblue -command [myproc register]

        grid ${config}.axis_check -sticky w
        grid ${config}.spc1
        grid ${config}.rate_frame -sticky ew -padx 5
        grid ${config}.spc2
        grid ${config}.chan_frame -sticky ew -padx 5
        grid ${config}.spc3
        grid ${config}.thrs_check -sticky w
        grid ${config}.thrs_field -sticky ew -pady 1 -padx 5
        grid ${config}.spc4
        grid ${config}.cntr -sticky w -pady 1 -padx 3
        grid ${config}.cntr_frame -sticky ew -padx 5
        grid ${config}.spc5
        grid ${config}.start -sticky ew -pady 3 -padx 5
        grid ${config}.reset -sticky ew -pady 3 -padx 5
        grid ${config}.spc6
        grid ${config}.register -sticky ew -pady 3 -padx 5

        grid ${graph} -row 0 -column 0 -sticky news
        grid ${config} -row 0 -column 1

        grid rowconfigure ${master} 0 -weight 1
        grid columnconfigure ${master} 0 -weight 1
        grid columnconfigure ${master} 1 -weight 0 -minsize 80

        grid columnconfigure ${config}.rate_frame 1 -weight 1
        grid columnconfigure ${config}.chan_frame 1 -weight 1

        # enable zooming
        Blt_ZoomStack $graph

        my crosshairs $graph

        #bind .graph <Motion> {%W crosshairs configure -position @%x,%y}

        # create one element with data for the x and y axis, no dots
        $graph element create Spectrum1 -color blue -linewidth 2 -symbol none -smooth step -xdata [myvar xvec] -ydata [myvar yvec]
    }

# -------------------------------------------------------------------------

    HstDisplay instproc coor_update {W x y} {
        my instvar config graph

        $W crosshairs configure -position @${x},${y}

        set index [$W axis invtransform x $x]
        set index [::tcl::mathfunc::round $index]
        catch {
            ${config}.chan_frame.axisy_value configure -text [[myvar yvec] index $index]
            ${config}.chan_frame.axisx_value configure -text ${index}.0
        }
    }
# -------------------------------------------------------------------------

    HstDisplay instproc crosshairs {graph} {
        set method [myproc coor_update]
        bind $graph <Motion> [list [self] coor_update %W %x %y]
        bind $graph <Leave> {
            %W crosshairs off
        }
        bind $graph <Enter> {
            %W crosshairs on
        }
    }

# -------------------------------------------------------------------------

    HstDisplay instproc axis_update args {
        my instvar axis graph
        if {$axis} {
            $graph axis configure y -min 1 -max 1E10 -logscale yes
        } else {
            $graph axis configure y -min {} -max {} -logscale no
        }
    }

# -------------------------------------------------------------------------

    HstDisplay instproc thrs_update args {
        my instvar controller config number thrs thrs_val

        if {[string equal $thrs_val {}]} {
            set thrs_val 0
        }

        set val_addr [format %02x [expr {6 + 2 * ${number}}]]

        if {$thrs} {
            ${config}.thrs_field configure -state normal
            set value [format %03x $thrs_val]
        } else {
            ${config}.thrs_field configure -state disabled
            set value 000
        }

        $controller usbCmd 000200${val_addr}00040${value}
    }

# -------------------------------------------------------------------------

    HstDisplay instproc rate_val_update {name key op} {
        my instvar config rate_val

        ${config}.rate_frame.${key}_value configure -text [format {%.2e} $rate_val(${key})]
    }

# -------------------------------------------------------------------------

    HstDisplay instproc cntr_val_update args {
        my instvar cntr_val cntr_h cntr_m cntr_s

        set cntr_tmp [expr {${cntr_val}/20000}]
        set cntr_h [expr {${cntr_tmp}/3600000}]
        set cntr_m [expr {${cntr_tmp}%3600000/60000}]
        set cntr_s [expr {${cntr_tmp}%3600000%60000/1000.0}]
    }

# -------------------------------------------------------------------------

    HstDisplay instproc cntr_setup {} {
        my instvar controller number cntr_val

        set word0 [format %08x [expr {${cntr_val} & 0xFFFFFFFF}]]
        set word1 [format %08x [expr {${cntr_val} >> 32}]]

        set prefix [format %x [expr {5 + ${number}}]]

        set command {}
        append command 0001${prefix}000000200000004[string range $word0 4 7]
        append command 0001${prefix}000000200010004[string range $word0 0 3]
        append command 0001${prefix}000000200020004[string range $word1 4 7]
        append command 0001${prefix}000000200030004[string range $word1 0 3]

        # send counter value
        $controller usbCmd $command

        # load counter value
#        set val_addr [format %02x [expr {12 + ${number}}]]
#        $controller usbCmd 000200${val_addr}00040001000200${val_addr}00040000
    }

# -------------------------------------------------------------------------

    HstDisplay instproc cntr_reset {} {
        my instvar controller number after_handle
        my instvar cntr_val cntr_bak cntr_old yvec_bak yvec_old

        my cntr_stop

        set value [format %04x [expr {1 << (5 + ${number})}]]
        $controller usbCmd 000200000004${value}0002000000040000

        set cntr_val $cntr_bak
        my cntr_setup

        set cntr_old $cntr_bak
        set yvec_bak 0.0
        set yvec_old 0.0
        
        my acquire

        my cntr_ready
    }

# -------------------------------------------------------------------------

    HstDisplay instproc cntr_ready {} {
        my instvar config cntr_val cntr_bak

        set cntr_val $cntr_bak

        ${config}.start configure -text Start -command [myproc cntr_start]
        ${config}.reset configure -state active

        ${config}.cntr_frame.h_field configure -state normal
        ${config}.cntr_frame.m_field configure -state normal
        ${config}.cntr_frame.s_field configure -state normal
    }

# -------------------------------------------------------------------------

    HstDisplay instproc cntr_start {} {
        my instvar config
        my instvar cntr_h cntr_m cntr_s
        my instvar cntr_val cntr_bak cntr_old yvec_bak yvec_old

        set h $cntr_h
        set m $cntr_m
        set s $cntr_s

        if {[string equal $h {}]} {
            set h 0
        }
        if {[string equal $m {}]} {
            set m 0
        }
        if {[string equal $s {}]} {
            set s 0
        }

        set cntr_tmp [expr {${h}*3600000 + ${m}*60000 + ${s}*1000}]
        set cntr_tmp [expr {entier(20000 * ${cntr_tmp})}]

        if {$cntr_tmp > 0} {
            ${config}.cntr_frame.h_field configure -state disabled
            ${config}.cntr_frame.m_field configure -state disabled
            ${config}.cntr_frame.s_field configure -state disabled

            set cntr_val $cntr_tmp
            set cntr_bak $cntr_tmp
            set cntr_old $cntr_tmp
            set yvec_bak [usb::integrateBlt [myvar yvec] 0]
            set yvec_old $yvec_bak

            my cntr_setup

            my cntr_resume
        }
    }

# -------------------------------------------------------------------------

    HstDisplay instproc cntr_pause {} {
        my instvar config

        my cntr_stop

        ${config}.start configure -text Resume -command [myproc cntr_resume]
#        ${config}.reset configure -state active

    }

# -------------------------------------------------------------------------

    HstDisplay instproc cntr_resume {} {
        my instvar controller config number auto

        set val_addr [format %02x [expr {13 + ${number}}]]

        ${config}.start configure -text Pause -command [myproc cntr_pause]
#        ${config}.reset configure -state disabled

        $controller usbCmd 000200${val_addr}00040002

        set auto 1

        after 100 [myproc acquire_loop]
    }

# -------------------------------------------------------------------------

    HstDisplay instproc cntr_stop {} {
        my instvar controller config number auto

        set val_addr [format %02x [expr {13 + ${number}}]]

        $controller usbCmd 000200${val_addr}00040000

        set auto 0
    }

# -------------------------------------------------------------------------

    HstDisplay instproc data_update args {
        my instvar data
        usb::convertBlt $data 4 [myvar yvec]
    }

# -------------------------------------------------------------------------

    HstDisplay instproc acquire_loop {} {
        my instvar cntr_val auto

        my acquire

        if {$cntr_val == 0} {
            my cntr_stop
            my cntr_ready
        } elseif {$auto} {
            after 1000 [myproc acquire_loop]
        }
    }

# -------------------------------------------------------------------------

    HstDisplay instproc acquire {} {
        my instvar controller config number
        my instvar cntr_val cntr_bak cntr_old yvec_bak yvec_old rate_val

        set size 4096

        set prefix [format {%x} [expr {$number + 2}]]

        set value [format {%08x} [expr {$size * 2}]]

        set command 0001${prefix}000000200000001[string range $value 0 3]0003[string range $value 4 7]00050000

        $controller usbCmdReadRaw $command [expr {$size * 4}] [myvar data]
        set yvec_new [usb::integrateBlt [myvar yvec] 0]

        set prefix [format {%x} [expr {$number + 5}]]
        set command 0001${prefix}000000200000003000400050000

        $controller usbCmdReadHex $command 8 1 [myvar cntr_val]
        set cntr_new $cntr_val

        if {$cntr_new < $cntr_old} {
            set rate_val(inst) [expr {($yvec_new - $yvec_old)*20000000/($cntr_old - $cntr_new)}]
            set rate_val(mean) [expr {($yvec_new - $yvec_bak)*20000000/($cntr_bak - $cntr_new)}]
            ${config}.chan_frame.entr_value configure -text $yvec_new

            set yvec_old $yvec_new
            set cntr_old $cntr_new
        }
   }

# -------------------------------------------------------------------------

    HstDisplay instproc save_data {data} {
        my instvar number

        set types {
            {{Data Files}       {.dat}        }
            {{All Files}        *             }
        }

        set stamp [clock format [clock seconds] -format %Y%m%d_%H%M%S]
        set fname spectrum_[expr {$number + 1}]_${stamp}.dat

        set fname [tk_getSaveFile -filetypes $types -initialfile $fname]
        if {[string equal $fname {}]} {
            return
        }

        set x [catch {
            set fid [open $fname w+]
            puts $fid $data
            close $fid
        }]

        if { $x || ![file exists $fname] || ![file isfile $fname] || ![file readable $fname] } {
            tk_messageBox -icon error \
                -message "An error occurred while writing to \"$fname\""
        } else {
            tk_messageBox -icon info \
                -message "File \"$fname\" written successfully"
        }
    }

# -------------------------------------------------------------------------

    HstDisplay instproc register {} {
        my save_data [join [[myvar yvec] range 0 4095] \n]
    }

# -------------------------------------------------------------------------

    Class CntDisplay -parameter {
        {master}
        {controller}
    }

# -------------------------------------------------------------------------

    CntDisplay instproc init {} {

        my set data {}
        my set cntr 0
        my set recs 0

        vector create [myvar xvec](16384)
        vector create [myvar yvec](16384)

        # fill one vector for the x axis with 16384 points
        [myvar xvec] seq -0.5 16384.5

        my setup

        next
    }

# -------------------------------------------------------------------------

    CntDisplay instproc destroy {} {
        next
    }

# -------------------------------------------------------------------------

    CntDisplay instproc start {} {
        my instvar config

        trace add variable [myvar data] write [myproc data_update]

        trace add variable [myvar thrs] write [myproc thrs_update]
        trace add variable [myvar thrs_val] write [myproc thrs_update]

        trace add variable [myvar cntr] write [myproc cntr_update]
        trace add variable [myvar recs] write [myproc recs_update]

        trace add variable [myvar axis] write [myproc axis_update]

        ${config}.axis_check select

        ${config}.thrs_check select
        ${config}.thrs_field set 25

        my set cntr_val 100
        my set cntr_bak 100
        my set recs_val 100
        my set recs_bak 100

#        my cntr_reset
    }

# -------------------------------------------------------------------------

    CntDisplay instproc setup {} {
        my instvar master
        my instvar xvec yvec graph
        my instvar config
        my instvar cntr_ms

        # create a graph widget and show a grid
        set graph [graph ${master}.graph -height 250 -leftmargin 80]
        $graph crosshairs configure -hide no -linewidth 1 -color darkblue -dashes {2 2}
        $graph grid configure -hide no
        $graph legend configure -hide yes
        $graph axis configure x -min 0 -max 16384

        set config [frame ${master}.config -width 170]

        checkbutton ${config}.axis_check -text {log scale} -variable [myvar axis]

        frame ${config}.spc1 -width 170 -height 30

        frame ${config}.chan_frame -borderwidth 0 -width 170
        legendLabel ${config}.chan_frame 0 mean  {Mean value}
        legendLabel ${config}.chan_frame 1 entr  {Total entries}
        legendLabel ${config}.chan_frame 2 empty {}
        legendLabel ${config}.chan_frame 3 axisy {Bin entries}
        legendLabel ${config}.chan_frame 4 axisx {Bin number}

        frame ${config}.spc3 -width 170 -height 30

        checkbutton ${config}.thrs_check -text {amplitude threshold} -variable [myvar thrs]
        spinbox ${config}.thrs_field -from 1 -to 4095 \
            -increment 5 -width 10 -textvariable [myvar thrs_val] \
            -validate all -vcmd {::mca::validate 4095 4 %P}

        frame ${config}.spc4 -width 170 -height 30

        label ${config}.cntr -text {time of exposure (ms)}
        spinbox ${config}.cntr_field -from 0 -to 9999 \
            -increment 10 -width 10 -textvariable [myvar cntr_val] \
            -validate all -vcmd {::mca::validate 9999 4 %P}

        frame ${config}.spc5 -width 170 -height 10

        label ${config}.recs -text {number of exposures}
        spinbox ${config}.recs_field -from 0 -to 99999 \
            -increment 10 -width 10 -textvariable [myvar recs_val] \
            -validate all -vcmd {::mca::validate 99999 5 %P}

        frame ${config}.spc6 -width 170 -height 10

        button ${config}.start -text {Start}  \
            -bg yellow -activebackground yellow -command [myproc recs_start]

        button ${config}.reset -text Reset \
            -bg red -activebackground red -command [myproc cntr_reset]

        frame ${config}.spc7 -width 170 -height 30

        button ${config}.register -text Register \
            -bg lightblue -activebackground lightblue -command [myproc register]

        grid ${config}.axis_check -sticky w
        grid ${config}.spc1
        grid ${config}.chan_frame -sticky ew -padx 5
        grid ${config}.spc3
        grid ${config}.thrs_check -sticky w
        grid ${config}.thrs_field -sticky ew -pady 1 -padx 5
        grid ${config}.spc4
        grid ${config}.cntr -sticky w -pady 1 -padx 3
        grid ${config}.cntr_field -sticky ew -pady 1 -padx 5
        grid ${config}.spc5
        grid ${config}.recs -sticky w -pady 1 -padx 3
        grid ${config}.recs_field -sticky ew -pady 1 -padx 5
        grid ${config}.spc6
        grid ${config}.start -sticky ew -pady 3 -padx 5
        grid ${config}.reset -sticky ew -pady 3 -padx 5
        grid ${config}.spc7
        grid ${config}.register -sticky ew -pady 3 -padx 5

        grid ${graph} -row 0 -column 0 -sticky news
        grid ${config} -row 0 -column 1

        grid rowconfigure ${master} 0 -weight 1
        grid columnconfigure ${master} 0 -weight 1
        grid columnconfigure ${master} 1 -weight 0 -minsize 80

        grid columnconfigure ${config}.chan_frame 1 -weight 1

        # enable zooming
        Blt_ZoomStack $graph

        my crosshairs $graph

        #bind .graph <Motion> {%W crosshairs configure -position @%x,%y}

        # create one element with data for the x and y axis, no dots
        $graph element create Spectrum1 -color blue -linewidth 2 -symbol none -smooth step -xdata [myvar xvec] -ydata [myvar yvec]
    }

# -------------------------------------------------------------------------

    CntDisplay instproc coor_update {W x y} {
        my instvar config graph

        $W crosshairs configure -position @${x},${y}

        set index [$W axis invtransform x $x]
        set index [::tcl::mathfunc::round $index]
        catch {
            ${config}.chan_frame.axisy_value configure -text [[myvar yvec] index $index]
            ${config}.chan_frame.axisx_value configure -text ${index}.0
        }
    }
# -------------------------------------------------------------------------

    CntDisplay instproc crosshairs {graph} {
        set method [myproc coor_update]
        bind $graph <Motion> [list [self] coor_update %W %x %y]
        bind $graph <Leave> {
            %W crosshairs off
        }
        bind $graph <Enter> {
            %W crosshairs on
        }
    }

# -------------------------------------------------------------------------

    CntDisplay instproc thrs_update args {
        my instvar controller config thrs thrs_val

        if {[string equal $thrs_val {}]} {
            set thrs_val 0
        }

        set number 0
        set val_addr [format %02x [expr {7 + 2 * ${number}}]]

        if {$thrs} {
            ${config}.thrs_field configure -state normal
            set value [format %03x $thrs_val]
        } else {
            ${config}.thrs_field configure -state disabled
            set value 000
        }

        $controller usbCmd 000200${val_addr}00040${value}
    }

# -------------------------------------------------------------------------

    CntDisplay instproc cntr_update args {
        my instvar cntr cntr_val
        set cntr_val [expr {${cntr}/20000}]

    }

# -------------------------------------------------------------------------

    CntDisplay instproc recs_update args {
        my instvar recs recs_val
        set recs_val [expr {${recs}*1}]
    }

# -------------------------------------------------------------------------

    CntDisplay instproc cntr_setup {} {
        my instvar controller cntr_val

        set cntr_tmp [expr {${cntr_val} * 20000}]
        set word0 [format {%08x} [expr {${cntr_tmp} & 0xFFFFFFFF}]]
        set word1 [format {%08x} [expr {${cntr_tmp} >> 32}]]

        set prefix [format {%x} 9]

        set command {}
        append command 0001${prefix}000000200000004[string range $word0 4 7]
        append command 0001${prefix}000000200010004[string range $word0 0 3]
        append command 0001${prefix}000000200020004[string range $word1 4 7]
        append command 0001${prefix}000000200030004[string range $word1 0 3]

        # send counter value
        $controller usbCmd $command
    }

# -------------------------------------------------------------------------

    CntDisplay instproc recs_setup {} {
        my instvar controller recs_val

        set word0 [format {%08x} [expr {${recs_val} & 0xFFFFFFFF}]]
        set word1 [format {%08x} [expr {${recs_val} >> 32}]]

        set prefix [format {%x} 10]

        set command {}
        append command 0001${prefix}000000200000004[string range $word0 4 7]
        append command 0001${prefix}000000200010004[string range $word0 0 3]
        append command 0001${prefix}000000200020004[string range $word1 4 7]
        append command 0001${prefix}000000200030004[string range $word1 0 3]

        # send counter value
        $controller usbCmd $command
    }

# -------------------------------------------------------------------------

    CntDisplay instproc cntr_reset {} {
        my instvar controller after_handle
        my instvar cntr_val cntr_bak recs_val recs_bak

        my cntr_stop

        set value [format {%04x} [expr {1 << 11}]]
        $controller usbCmd 000200000004${value}0002000000040000

        my recs_stop
    }

# -------------------------------------------------------------------------

    CntDisplay instproc cntr_ready {} {
        my instvar config cntr_val cntr_bak recs_val recs_bak

        set cntr_val $cntr_bak
        set recs_val $recs_bak

        ${config}.start configure -text Start -command [myproc recs_start]
        ${config}.reset configure -state active

        ${config}.start configure -state active
        ${config}.cntr_field configure -state normal
        ${config}.recs_field configure -state normal
    }

# -------------------------------------------------------------------------

    CntDisplay instproc recs_start {} {
        my instvar controller config auto
        my instvar cntr_val cntr_bak recs_val recs_bak

        if {$cntr_val > 0 && $recs_val > 0} {
            ${config}.start configure -text {Stop} -command [myproc recs_stop]
            ${config}.cntr_field configure -state disabled
            ${config}.recs_field configure -state disabled

            set cntr_bak $cntr_val
            set recs_bak $recs_val

            my cntr_setup
            my recs_setup

            set val_addr [format {%02x} 16]

            $controller usbCmd 000200${val_addr}00040002

            set auto 1

            after 100 [myproc acquire_loop]
        }
    }

# -------------------------------------------------------------------------

    CntDisplay instproc recs_stop {} {
        my instvar cntr_val cntr_bak recs_val recs_bak

        my cntr_stop

        set cntr_val $cntr_bak
        my cntr_setup

        set recs_val $recs_bak
        my recs_setup

        my acquire

        my cntr_ready
    }

# -------------------------------------------------------------------------

    CntDisplay instproc cntr_stop {} {
        my instvar controller config auto

        set val_addr [format {%02x} 16]

        $controller usbCmd 000200${val_addr}00040000

        set auto 0
    }

# -------------------------------------------------------------------------

    CntDisplay instproc acquire_loop {} {
        my instvar recs_val auto

        my acquire

        if {$recs_val == 0} {
            my cntr_stop
            my cntr_ready
        } elseif {$auto} {
            after 1000 [myproc acquire_loop]
        }
    }

# -------------------------------------------------------------------------

    CntDisplay instproc data_update args {
        my instvar config data
        usb::convertBlt $data 2 [myvar yvec]

        ${config}.chan_frame.mean_value configure \
            -text [format {%.2e} [usb::integrateBlt [myvar yvec] 1]]
        ${config}.chan_frame.entr_value configure \
            -text [usb::integrateBlt [myvar yvec] 0]

    }

# -------------------------------------------------------------------------

    CntDisplay instproc axis_update args {
        my instvar axis graph
        if {$axis} {
            $graph axis configure y -min 1 -max 1E5 -logscale yes
        } else {
            $graph axis configure y -min {} -max {} -logscale no
        }
    }

# -------------------------------------------------------------------------

    CntDisplay instproc acquire {} {
        my instvar controller config
        my instvar cntr cntr_val recs recs_val

        set size 16384

        set prefix [format {%x} 8]

        set value [format {%08x} $size]

        set command 0001${prefix}000000200000001[string range $value 0 3]0003[string range $value 4 7]00050000

        $controller usbCmdReadRaw $command [expr {$size * 2}] [myvar data]

        set prefix [format {%x} 9]
        set command 0001${prefix}000000200000003000400050000

        $controller usbCmdReadHex $command 8 1 [myvar cntr]

        set prefix [format {%x} 10]
        set command 0001${prefix}000000200000003000400050000

        $controller usbCmdReadHex $command 8 1 [myvar recs]
   }

# -------------------------------------------------------------------------

    CntDisplay instproc save_data {data} {

        set types {
            {{Data Files}       {.dat}        }
            {{All Files}        *             }
        }

        set stamp [clock format [clock seconds] -format %Y%m%d_%H%M%S]
        set fname counts_${stamp}.dat

        set fname [tk_getSaveFile -filetypes $types -initialfile $fname]
        if {[string equal $fname {}]} {
            return
        }

        set x [catch {
            set fid [open $fname w+]
            puts $fid $data
            close $fid
        }]

        if { $x || ![file exists $fname] || ![file isfile $fname] || ![file readable $fname] } {
            tk_messageBox -icon error \
                -message "An error occurred while writing to \"$fname\""
        } else {
            tk_messageBox -icon info \
                -message "File \"$fname\" written successfully"
        }
    }

# -------------------------------------------------------------------------

    CntDisplay instproc register {} {
        my save_data [join [[myvar yvec] range 0 16383] \n]
    }

# -------------------------------------------------------------------------

    Class OscDisplay -parameter {
        {master}
        {controller}
    }

# -------------------------------------------------------------------------

    OscDisplay instproc init {} {
        my instvar sequence data xvec yvec

        set data {}
        
        set sequence 0

#        set xvec [vector create #auto(262144)]
        set xvec [vector create #auto(10000)]

        for {set i 1} {$i <= 9} {incr i} {
#          dict set yvec $i [vector create #auto(262144)]
          dict set yvec $i [vector create #auto(10000)]
        }

        # fill one vector for the x axis
#        $xvec seq 0 262143
        $xvec seq 0 10000

        my setup

        next
    }

# -------------------------------------------------------------------------

    OscDisplay instproc destroy {} {
        next
    }

# -------------------------------------------------------------------------

    OscDisplay instproc start {} {
        my instvar config
        my instvar recs_val directory

        set directory $::env(HOMEPATH)
        set recs_val 100

        trace add variable [myvar chan] write [myproc chan_update]

        trace add variable [myvar data] write [myproc data_update]

        trace add variable [myvar auto] write [myproc auto_update]

        trace add variable [myvar thrs] write [myproc thrs_update 0]
        trace add variable [myvar thrs_val] write [myproc thrs_update 0]

        trace add variable [myvar recs_val] write [myproc recs_val_update]

        trace add variable [myvar last] write [myproc last_update]

        ${config}.chan_frame.chan1_check select
        ${config}.chan_frame.chan2_check select
        ${config}.chan_frame.chan3_check select
        ${config}.chan_frame.chan4_check select
        ${config}.chan_frame.chan5_check select
        ${config}.chan_frame.chan6_check select

        ${config}.thrs_check select
        ${config}.thrs_field set 100
    }

# -------------------------------------------------------------------------

    OscDisplay instproc setup {} {
        my instvar master
        my instvar xvec yvec graph
        my instvar config

        # create a graph widget and show a grid
        set graph [graph ${master}.graph -height 250 -leftmargin 80]
        $graph crosshairs configure -hide no -linewidth 1 -color darkblue -dashes {2 2}
        $graph grid configure -hide no
        $graph legend configure -hide yes
        $graph axis configure x -min 0 -max 10000
        $graph axis configure y -min 0 -max 4100

#        scale ${master}.last -orient horizontal -from 1 -to 27 -tickinterval 0 -showvalue no -variable [myvar last]

        set config [frame ${master}.config -width 170]

        frame ${config}.chan_frame -width 170
        legendButton ${config}.chan_frame 0 chan1 {Channel 1} [myvar chan(1)] turquoise2
        legendButton ${config}.chan_frame 1 chan2 {Channel 2} [myvar chan(2)] SpringGreen2
        legendButton ${config}.chan_frame 2 chan3 {Channel 3} [myvar chan(3)] orchid2
        legendButton ${config}.chan_frame 3 chan4 {Channel 4} [myvar chan(4)] orange2
        legendButton ${config}.chan_frame 4 chan5 {Channel 5} [myvar chan(5)] blue1 white
        legendButton ${config}.chan_frame 5 chan6 {Channel 6} [myvar chan(6)] gray65 white
        legendLabel  ${config}.chan_frame 6 axisx {Time axis}

        frame ${config}.spc1 -width 170 -height 30

        checkbutton ${config}.auto_check -text {auto update} -variable [myvar auto]

        frame ${config}.spc2 -width 170 -height 30

        checkbutton ${config}.thrs_check -text threshold -variable [myvar thrs]
        spinbox ${config}.thrs_field -from 1 -to 4095 \
            -increment 5 -width 10 -textvariable [myvar thrs_val] \
            -validate all -vcmd {::mca::validate 4095 4 %P}

        frame ${config}.spc3 -width 170 -height 30

        button ${config}.acquire -text Acquire \
            -bg green -activebackground green -command [myproc acquire_start]
        button ${config}.register -text Register \
            -bg lightblue -activebackground lightblue -command [myproc register]

        frame ${config}.spc4 -width 170 -height 30

        label ${config}.recs -text {number of records}
        spinbox ${config}.recs_field -from 0 -to 10000 \
            -increment 10 -width 10 -textvariable [myvar recs_val] \
            -validate all -vcmd {::mca::validate 10000 5 %P}

        frame ${config}.spc5 -width 170 -height 10

        button ${config}.sequence -text {Start Recording} -command [myproc sequence_start] \
            -bg yellow -activebackground yellow

        frame ${config}.spc6 -width 170 -height 10

        button ${config}.recover -text {Read file} \
            -bg lightblue -activebackground lightblue -command [myproc recover]

        grid ${config}.chan_frame -sticky ew
        grid ${config}.spc1
        grid ${config}.auto_check -sticky w
        grid ${config}.spc2
        grid ${config}.thrs_check -sticky w
        grid ${config}.thrs_field -sticky ew -pady 1 -padx 5
        grid ${config}.spc3
        grid ${config}.acquire -sticky ew -pady 3 -padx 5
        grid ${config}.register -sticky ew -pady 3 -padx 5
        grid ${config}.spc4
        grid ${config}.recs -sticky w -pady 1 -padx 3
        grid ${config}.recs_field -sticky ew -pady 1 -padx 5
        grid ${config}.spc5
        grid ${config}.sequence -sticky ew -pady 3 -padx 5
        grid ${config}.spc6
        grid ${config}.recover -sticky ew -pady 3 -padx 5

        grid ${graph} -row 0 -column 0 -sticky news
        grid ${config} -row 0 -column 1

#        grid ${master}.last -row 1 -column 0 -columnspan 2 -sticky ew

        grid rowconfigure ${master} 0 -weight 1
        grid columnconfigure ${master} 0 -weight 1
        grid columnconfigure ${master} 1 -weight 0 -minsize 120

        grid columnconfigure ${config}.chan_frame 2 -weight 1

        # enable zooming
        Blt_ZoomStack $graph

        my crosshairs $graph

        # create one element with data for the x and y axis, no dots
        $graph pen create pen1 -color turquoise3 -linewidth 2 -symbol none
        $graph pen create pen2 -color SpringGreen3 -linewidth 2 -symbol none
        $graph pen create pen3 -color orchid3 -linewidth 2 -symbol none
        $graph pen create pen4 -color orange3 -linewidth 2 -symbol none
        $graph pen create pen5 -color blue2 -linewidth 2 -symbol none
        $graph pen create pen6 -color gray55 -linewidth 2 -symbol none

        $graph element create Spectrum1 -pen pen1 -xdata $xvec -ydata [dict get $yvec 1]
        $graph element create Spectrum2 -pen pen2 -xdata $xvec -ydata [dict get $yvec 2]
        $graph element create Spectrum3 -pen pen3 -xdata $xvec -ydata [dict get $yvec 3]
        $graph element create Spectrum4 -pen pen4 -xdata $xvec -ydata [dict get $yvec 4]
        $graph element create Spectrum5 -pen pen5 -xdata $xvec -ydata [dict get $yvec 5]
        $graph element create Spectrum6 -pen pen6 -xdata $xvec -ydata [dict get $yvec 6]
    }

# -------------------------------------------------------------------------

    OscDisplay instproc coor_update {W x y} {
        my instvar xvec yvec graph
        my instvar config

        $W crosshairs configure -position @${x},${y}

        set index [$W axis invtransform x $x]
        set index [::tcl::mathfunc::round $index]
        catch {
            ${config}.chan_frame.chan1_value configure -text [[dict get $yvec 1] index $index]
            ${config}.chan_frame.chan2_value configure -text [[dict get $yvec 2] index $index]
            ${config}.chan_frame.chan3_value configure -text [[dict get $yvec 3] index $index]
            ${config}.chan_frame.chan4_value configure -text [[dict get $yvec 4] index $index]
            ${config}.chan_frame.chan5_value configure -text [[dict get $yvec 5] index $index]
            ${config}.chan_frame.chan6_value configure -text [[dict get $yvec 6] index $index]
            ${config}.chan_frame.axisx_value configure -text ${index}.0
        }
    }
# -------------------------------------------------------------------------

    OscDisplay instproc crosshairs {graph} {
        set method [myproc coor_update]
        bind $graph <Motion> [list [self] coor_update %W %x %y]
        bind $graph <Leave> {
            %W crosshairs off
        }
        bind $graph <Enter> {
            %W crosshairs on
        }
    }

# -------------------------------------------------------------------------

    OscDisplay instproc chan_update {name key op} {
        my instvar config graph chan

        if {$chan(${key})} {
            $graph pen configure pen${key} -linewidth 2
        } else {
            $graph pen configure pen${key} -linewidth 0
        }
    }

# -------------------------------------------------------------------------

    OscDisplay instproc recs_val_update args {
        my instvar recs_val
        if {[string equal $recs_val {}]} {
            set recs_val 0
        }
    }

# -------------------------------------------------------------------------

    OscDisplay instproc last_update args {
        my instvar graph last

        set first [expr {$last - 1}]

        $graph axis configure x -min ${first}0000 -max ${last}0000
    }

# -------------------------------------------------------------------------

    OscDisplay instproc thrs_update {reset args} {
        my instvar controller config thrs thrs_val

        if {[string equal $thrs_val {}]} {
            set thrs_val 0
        }

        if {$thrs} {
            ${config}.thrs_field configure -state normal
            set value [format %03x $thrs_val]
        } else {
            ${config}.thrs_field configure -state disabled
            set value 000
        }

        set command {}
        if {$reset} {
            append command 0002000500041${value}
        }
        append command 0002000500040${value}

        $controller usbCmd $command
    }

# -------------------------------------------------------------------------

    OscDisplay instproc data_update args {
        my instvar data yvec
        my instvar graph chan waiting sequence auto

        usb::convertOsc $data $yvec

        foreach {key value} [array get chan] {
            $graph pen configure pen${key} -dashes 0
        }

        set waiting 0

        if {$sequence} {
            my sequence_register
        } elseif {$auto} {
            after 1000 [myproc acquire_start]
        }
    }

# -------------------------------------------------------------------------

    OscDisplay instproc acquire_start {} {
        my instvar graph chan controller waiting

        foreach {key value} [array get chan] {
            $graph pen configure pen${key} -dashes dot
        }

        # restart
        my thrs_update 1

        set waiting 1

        after 200 [myproc acquire_loop]
    }

# -------------------------------------------------------------------------

    OscDisplay instproc acquire_loop {} {
        my instvar controller waiting

#        set size 262144
        set size 10000

        set value [format {%08x} [expr {$size * 4}]]

        set command 00011000000200000001[string range $value 0 3]0003[string range $value 4 7]00050000
        
        $controller usbCmdReadRaw $command [expr {$size * 8}] [myvar data]

        if {$waiting} {
            after 200 [myproc acquire_loop]
        }
    }

# -------------------------------------------------------------------------

    OscDisplay instproc auto_update args {
        my instvar config auto

        if {$auto} {
            ${config}.recs_field configure -state disabled
            ${config}.sequence configure -state disabled
            ${config}.acquire configure -state disabled
            ${config}.register configure -state disabled
            ${config}.recover configure -state disabled

            my acquire_start
        } else {
            ${config}.recs_field configure -state normal
            ${config}.sequence configure -state active
            ${config}.acquire configure -state active
            ${config}.register configure -state active
            ${config}.recover configure -state active
        }
    }

# -------------------------------------------------------------------------

    OscDisplay instproc save_data {fname} {
        my instvar data

        set fid [open $fname w+]
        fconfigure $fid -translation binary -encoding binary

#        puts -nonewline $fid [binary format "H*iH*" "1f8b0800" [clock seconds] "0003"]
#        puts -nonewline $fid [zlib deflate $data]
        puts -nonewline $fid $data
#        puts -nonewline $fid [binary format i [zlib crc32 $data]]
#        puts -nonewline $fid [binary format i [string length $data]]

        close $fid
    }

# -------------------------------------------------------------------------

    OscDisplay instproc open_data {} {
        set types {
            {{Data Files}       {.dat}     }
            {{All Files}        *             }
        }

        set fname [tk_getOpenFile -filetypes $types]
        if {[string equal $fname {}]} {
            return
        }

        set x [catch {
            set fid [open $fname r+]
            fconfigure $fid -translation binary -encoding binary
#            set size [file size $fname]
#            seek $fid 10
#            my set data [zlib inflate [read $fid [expr {$size - 18}]]]
            my set data [read $fid]
            close $fid
        }]

        if { $x || ![file exists $fname] || ![file isfile $fname] || ![file readable $fname] } {
            tk_messageBox -icon error \
                -message "An error occurred while reading \"$fname\""
        } else {
            tk_messageBox -icon info \
                -message "File \"$fname\" read successfully"
        }
    }

# -------------------------------------------------------------------------

    OscDisplay instproc register {} {
        set types {
            {{Data Files}       {.dat}     }
            {{All Files}        *             }
        }

        set stamp [clock format [clock seconds] -format %Y%m%d_%H%M%S]
        set fname oscillogram_${stamp}.dat

        set fname [tk_getSaveFile -filetypes $types -initialfile $fname]
        if {[string equal $fname {}]} {
            return
        }
    
        if {[catch {my save_data $fname} result]} {
            tk_messageBox -icon error \
                -message "An error occurred while writing to \"$fname\""
        } else {
            tk_messageBox -icon info \
                -message "File \"$fname\" written successfully"
        }
    }

# -------------------------------------------------------------------------

    OscDisplay instproc recover {} {
        my open_data
    }

# -------------------------------------------------------------------------

    OscDisplay instproc sequence_start {} {
        my instvar config recs_val recs_bak directory counter sequence

        set counter 1
        if {$counter > $recs_val} {
            return
        }

        set directory [tk_chooseDirectory -initialdir $directory -title {Choose a directory}]

        if {[string equal $directory {}]} {
           return
        }

        ${config}.recs_field configure -state disabled
        ${config}.sequence configure -text {Stop Recording} -command [myproc sequence_stop]
        ${config}.acquire configure -state disabled
        ${config}.register configure -state disabled
        ${config}.recover configure -state disabled
        
        set recs_bak $recs_val

        set sequence 1

        my acquire_start
    }

# -------------------------------------------------------------------------

    OscDisplay instproc sequence_register {} {
        my instvar config recs_val recs_bak directory counter

        set fname [file join $directory oscillogram_$counter.dat]

        my incr counter

        if {[catch {my save_data $fname} result]} {
            tk_messageBox -icon error \
                -message "An error occurred while writing to \"$fname\""
        } elseif {$counter <= $recs_bak} {
            set recs_val [expr {$recs_bak - $counter}]
            my acquire_start
            return
        }
        
        my sequence_stop
    }

# -------------------------------------------------------------------------

    OscDisplay instproc sequence_stop {} {
        my instvar config recs_val recs_bak sequence

        set sequence 0
        
        set recs_val $recs_bak

        ${config}.recs_field configure -state normal
        ${config}.sequence configure -text {Start Recording} -command [myproc sequence_start]
        ${config}.acquire configure -state active
        ${config}.register configure -state active
        ${config}.recover configure -state active
    }

# -------------------------------------------------------------------------

    namespace export MuxDisplay
    namespace export HstDisplay
    namespace export CntDisplay
    namespace export OscDisplay
}

set notebook [::blt::tabnotebook .notebook -borderwidth 1 -selectforeground black -side bottom]

grid ${notebook} -row 0 -column 0  -sticky news -pady 5

grid rowconfigure . 0 -weight 1
grid columnconfigure . 0 -weight 1

::mca::UsbController usb

set window [frame ${notebook}.hst_0]
$notebook insert end -text "Spectrum histogram" -window $window -fill both
::mca::HstDisplay hst_0 -number 0 -master $window -controller usb

set window [frame ${notebook}.cnt_0]
$notebook insert end -text "Rate histogram" -window $window -fill both
::mca::CntDisplay cnt_0 -master $window -controller usb

set window [frame ${notebook}.mux]
$notebook insert end -text "Interconnect" -window $window -fill both
::mca::MuxDisplay mux -master $window -controller usb

set window [frame ${notebook}.ept]
$notebook insert end -text "Oscilloscope" -window $window -fill both
::mca::OscDisplay osc -master $window -controller usb

update

usb usbCmd 00000000

hst_0 start

cnt_0 start

mux start

osc start