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#
# This file is part of the PyMeasure package.
#
# Copyright (c) 2013-2024 PyMeasure Developers
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
import pytest
from pymeasure.test import expected_protocol
from pymeasure.instruments.hp import HP3478A
VALID_CAL_DATA = [
0, 0, 0, 0, 3, 0, 8, 2, 15, 4, 4, 0, 13, 11, 0, 0,
0, 0, 3, 3, 2, 15, 5, 3, 0, 14, 0, 0, 0, 0, 0, 0,
3, 2, 15, 4, 0, 0, 14, 7, 9, 9, 9, 9, 9, 7, 2, 0,
15, 3, 12, 10, 11, 9, 9, 9, 9, 9, 9, 2, 0, 14, 15, 14,
9, 12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 15, 15, 9,
9, 8, 6, 0, 9, 2, 14, 14, 0, 12, 10, 12, 9, 9, 9, 9,
9, 5, 1, 12, 0, 5, 14, 10, 13, 9, 9, 9, 9, 9, 8, 1,
12, 1, 15, 1, 10, 12, 0, 0, 0, 0, 0, 0, 1, 12, 15, 3,
0, 14, 0, 9, 9, 9, 9, 9, 9, 1, 12, 13, 2, 14, 9, 15,
9, 9, 9, 9, 9, 9, 1, 12, 13, 4, 2, 10, 9, 9, 9, 9,
9, 9, 9, 1, 12, 14, 12, 13, 9, 5, 9, 9, 9, 9, 9, 9,
1, 12, 2, 1, 15, 10, 10, 0, 0, 0, 0, 4, 2, 3, 0, 0,
3, 12, 14, 7, 0, 0, 0, 0, 0, 4, 3, 0, 1, 12, 3, 14,
8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 15, 15, 9, 9,
8, 6, 0, 9, 3, 14, 3, 1, 1, 12, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 15, 15, 0, 0, 0, 0, 0, 0, 0, 0
]
def convert_cal_data_to_cal_read_xfers(cal_data):
# Convert cal_data into 256 single byte 'W' read operations.
cal_read_xfers = []
for addr, value in enumerate(cal_data):
cal_read_xfers.append([bytes([ord('W'), addr]), bytes([value+64])])
return cal_read_xfers
def convert_cal_data_to_cal_write_xfers(cal_data):
# Convert cal_data into 256 single byte 'X' write operations.
cal_write_xfers = []
for addr, value in enumerate(cal_data):
cal_write_xfers.append([bytes([ord('X'), addr, value]), None])
return cal_write_xfers
# ============================================================
# TESTS
# ============================================================
def test_calibration_enabled():
with expected_protocol(
HP3478A,
[
(b"B", b'\x00\x20\x00\x00\x00'), # cal_enable bit is set
(b"B", b'\x00\x00\x00\x00\x00')
],
) as instr:
assert instr.calibration_enabled
assert not instr.calibration_enabled
def test_calibration_data_getter():
cal_read_xfers = convert_cal_data_to_cal_read_xfers(VALID_CAL_DATA)
with expected_protocol(
HP3478A,
cal_read_xfers
) as instr:
cal_data = instr.calibration_data
assert instr.verify_calibration_data(cal_data)
def test_calibration_data_setter_cal_disabled():
with pytest.raises(Exception, match="CAL ENABLE switch not set to ON"):
with expected_protocol(
HP3478A,
# cal_enable cleared. As a result there won't be calibration
# write transactions.
[
(b"B", b'\x00\x00\x00\x00\x00'),
]
) as instr:
instr.calibration_data = VALID_CAL_DATA
def test_calibration_data_setter_pass():
valid_cal_write_xfers = convert_cal_data_to_cal_write_xfers(VALID_CAL_DATA)
with expected_protocol(
HP3478A,
# setter pass
[
(b"B", b'\x00\x20\x00\x00\x00'),
] + valid_cal_write_xfers
) as instr:
# Writing correct data
instr.calibration_data = VALID_CAL_DATA
def test_calibration_data_setter_invalid_data():
with pytest.raises(ValueError, match="cal_data verification fail"):
with expected_protocol(
HP3478A,
# setter fail due to invalid data
[
(b"B", b'\x00\x20\x00\x00\x00'),
]
) as instr:
# Assigning invalid data results in an Exception without data writes
valid_cal_data_corrupt = VALID_CAL_DATA.copy()
valid_cal_data_corrupt[1] = 1
instr.calibration_data = valid_cal_data_corrupt
def test_write_calibration_data():
invalid_cal_data = VALID_CAL_DATA.copy()
invalid_cal_data[1] = 1
invalid_cal_write_xfers = convert_cal_data_to_cal_write_xfers(invalid_cal_data)
with expected_protocol(
HP3478A,
invalid_cal_write_xfers
) as instr:
# Writing invalid data with verification bypass
instr.write_calibration_data(invalid_cal_data, verify_calibration_data=False)
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