make code clear
a bug fixed. (call myputf(0) puts '/')
range check bug fixed
modify "5000mV" -> "4995mV" in strings
change files' head info
polling signal CLK
do CTable zero value check when input but not before use
modify state -> stage
add DacInit() set dac output = 0.0V
add GetStage()
add SetStageAndVolt()
replace PortPolling(),PortTrigger() to En/ClkPolling(), En/ClkTrigger()