Port manager: Difference between revisions
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=== Supported port types === | === Supported port types === | ||
[[COM]]: standard PC serial port using RS-232 protocol | * [[COM]]: standard PC serial port using RS-232 protocol | ||
* [[GPIB]]: an IEEE-488-Bus, a standard communication | |||
[[GPIB]]: an IEEE-488-Bus, a standard communication | * [[USB]]: plug and play USB test and measurement device as supported by pyvisa | ||
* [[VB]]: a National Instrument VirtualBench device | |||
[[USB]]: plug and play USB test and measurement device as supported by pyvisa | |||
[[VB]]: a National Instrument VirtualBench device | |||
=== Configuration === | === Configuration === | ||
The following variables have to be set within the __init__ function of a Device Class: | The following variables have to be set within the ''__init__'' function of a Device Class: | ||
In order to get the available ports listed in the GUI of the corresponding [[Measurement Class]], choose desired port types by: | In order to get the available ports listed in the GUI of the corresponding [[Measurement Classes|Measurement Class]], choose desired port types by: | ||
{{syntaxhighlight|lang=python|code= | |||
self.port_types = ["COM", "GPIB", "USB", "VB"] | self.port_types = ["COM", "GPIB", "USB", "VB"] | ||
}} | |||
A port object is automatically created by | A port object is automatically created by | ||
{{syntaxhighlight|lang=python|code= | |||
self.port_manager = True | self.port_manager = True | ||
}} | |||
Further parameters can be changed through | Further parameters can be changed through | ||
{{syntaxhighlight|lang=python|code= | |||
self.port_properties = { | |||
"baudrate" : 9600, | |||
"EOL": "\n", | |||
... | |||
} | |||
}} | |||
Get a list of all port_properties using | Get a list of all port_properties using | ||
{{syntaxhighlight|lang=python|code= | |||
print self.port_properties | print self.port_properties | ||
}} | |||
=== Communicating === | === Communicating === | ||
If the port manager is activated, the port is automatically available within all functions of the [[sequencer procedure]] as the variable | If the port manager is activated, the port is automatically available within all functions of the [[sequencer procedure]] as the variable | ||
{{syntaxhighlight|lang=python|code= | |||
self.port | self.port | ||
}} | |||
A message can be sent using | A message can be sent using | ||
{{syntaxhighlight|lang=python|code= | |||
self.port.write("string of the message without end-of-line/terminator character") | self.port.write("string of the message without end-of-line/terminator character") | ||
}} | |||
The answer of a device is acquired by | The answer of a device is acquired by | ||
{{syntaxhighlight|lang=python|code= | |||
var = self.port.read() | var = self.port.read() | ||
}} | |||
Revision as of 22:57, 24 May 2017
Creating and handling port objects for use in a Device Class can be done via the SweepMe! port manager.
Supported port types
- COM: standard PC serial port using RS-232 protocol
- GPIB: an IEEE-488-Bus, a standard communication
- USB: plug and play USB test and measurement device as supported by pyvisa
- VB: a National Instrument VirtualBench device
Configuration
The following variables have to be set within the __init__ function of a Device Class:
In order to get the available ports listed in the GUI of the corresponding Measurement Class, choose desired port types by:
self.port_types = ["COM", "GPIB", "USB", "VB"]
A port object is automatically created by
self.port_manager = True
Further parameters can be changed through
self.port_properties = {
"baudrate" : 9600,
"EOL": "\n",
...
}
Get a list of all port_properties using
print self.port_properties
Communicating
If the port manager is activated, the port is automatically available within all functions of the sequencer procedure as the variable
self.port
A message can be sent using
self.port.write("string of the message without end-of-line/terminator character")
The answer of a device is acquired by
var = self.port.read()