Files
sea/tcl/drivers/ah2700.tcl
2025-02-28 11:27:34 +01:00

135 lines
3.0 KiB
Tcl

# Andeen Hagerling 2700 capacitance bridge
namespace eval ah2700 {} {
}
proc stdConfig::ah2700 {} {
controller std sendterminator=\r timeout=15 lineseparator=,
variable node
set node $node/tasks
prop start ah2700::start
obj AH2700 rd -none
prop read ah2700::read
prop do_read_avg 1
prop period 0
prop cnt 0
kids ah2700 {
node cap upd
prop fmt %.8f
node loss upd
prop fmt %.8f
node period out
default 5
prop check ah2700::change_period
prop write stdSct::complete
node freq out
prop label Frequency
prop writecmd "FR %g;SI"
prop complete ah2700::update
node V out
prop label Exitation Voltage
prop writecmd "V %g;SI"
prop complete ah2700::update
node average out -int
prop label "average setting"
prop writecmd "AV %d;SH AV"
prop complete ah2700::update_av
}
}
proc ah2700::start {} {
sct send "UN DS"
return ah2700::start1
}
proc ah2700::start1 {} {
set prefix [lindex [sct result] 0]
if {$prefix eq "UN" || $prefix eq ">UN"} { # this was the echo
sct send "SERIAL ECHO OFF"
return ah2700::start
}
if {$prefix ne "F=" && [sct result] ne "NO DATA FOUND"} {
error "bad response: [sct result]"
}
sct send "*IDN?{4}"
return ah2700::start2
}
proc ah2700::start2 {} {
sct result [join [sct result]]
return stdSct::completeStart
}
proc ah2700::read {} {
sct send "SI"
sct sendtime [DoubleTime]
return ah2700::update
}
proc ah2700::update {} {
# analyze result: _ is a placeholder for text words
lassign [string map {"=" "= "} [sct result]] prefix f _ _ c _ _ l un _ v
if {$prefix eq "SI" || $prefix eq ">SI"} { # this was the echo
sct send "\r\nSERIAL ECHO OFF\r"
return stdSct::complete
}
if {$prefix eq "F="} {
hupdate [sct objectPath]/status ""
} else {
hupdate [sct objectPath]/status [sct result]
}
set period [expr [DoubleTime] - [sct sendtime] + 0.1]
sct cnt [expr min(20, [sct cnt] + 1)]
set dif [expr $period - [sct period]]
sct period [expr [sct period] + $dif / [sct cnt]]
if {abs([sct period] - [hval [sct]/period]) > 0.1 || [sct cnt] == 10} {
set period [format {%.1f} [sct period]]
if {$period != [hval [sct]/period]} {
hupdate [sct]/period [format {%.1f} $period]
set_period [sct] $period
sct do_read_avg 1
}
}
hupdate [sct objectPath]/cap $c
hupdate [sct objectPath]/freq $f
hupdate [sct objectPath]/V $v
if {$un ne "DS"} {
sct send "UN DS"
return ah2700::update
}
hupdate [sct objectPath]/loss $l
if {[sct do_read_avg]} {
sct do_read_avg 0
sct send "SH AV"
return ah2700::update_av
}
return idle
}
proc ah2700::update_av {} {
set res [lindex [split [sct result] =] end]
catch {
hupdate [sct objectPath]/average $res
} msg
hsetprop [sct objectPath] cnt 0
return idle
}
proc ah2700::set_period {node target} {
[sct controllerName] poll $node $target
hupdate $node/period $target
}
proc ah2700::change_period {} {
set_period [sct objectPath] [sct target]
return idle
}