pyVisa termination characters

[Arnaud Descourvieres]

Hi,

I am attempting to get a basic communication with a Chroma power supply (62012P-40-120) using pyVisa as backend.

My issue is that it does not send termination characters and I did not find out how I could set the pyVisa termination characters ('\r\n')with python-IVI.

Here is the code I am using:

import pyvisa
pyvisa.log_to_screen()

import ivi
from chroma_62000P import *

import time

   
ivi.set_prefer_pyvisa(True)

dcps = ivi.chroma.chroma62012p40120("USB0::0x1698::0x0837::009000000571::INSTR", id_query = True, reset = True)

chan = 0

dcps.outputs[chan].enabled = False
dcps.outputs[chan].voltage_level = 24.0
dcps.outputs[chan].current_limit = 5.0

# Enable output
dcps.outputs[chan].enabled = True
time.sleep(2)

# Turn off output
dcps.outputs[chan].enabled = False

dcps.close()

Here is some pyVisa debug outputs:

2016-11-03 15:37:47,374 - pyvisa - DEBUG - viWrite(74591104, b'*CLS', 4, 'c_ulong(4)') -> 0
2016-11-03 15:37:47,427 - pyvisa - DEBUG - viWrite(74591104, b'*IDN?', 5, 'c_ulong(5)') -> 0

Best regards

Arnaud

[Ulrich Lukas]

Hi,

this might also be interesting for this issue:

Added support for termination characters via device constructor e.g:

scope = ivi.rigol.rigolDS1054Z(
        "TCPIP0::169.254.11.120::5555::SOCKET",
        pyvisa_opts={"read_termination":"\n", "write_termination":"\n"},
        prefer_pyvisa=True)

See pull request at: https://github.com/python-ivi/python-ivi/issues/75