def write(self, cmd):
if self.closed:
raise RuntimeError("Trying to write to a closed instrument")
num = float(cmd.split(':')[-1])
self.state = num
if num < 0:
raise ValueError('be more positive!')
if num == 0:
raise visa.VisaIOError(visa.constants.VI_ERROR_TMO)
return len(cmd)
def check_error(self, ret_code: int) -> None:
"""
Default error checking, raises an error if return code ``!=0``.
Does not differentiate between warnings or specific error messages.
Override this function in your driver if you want to add specific
error messages.
Args:
ret_code: A Visa error code. See eg:
https://github.com/hgrecco/pyvisa/blob/master/pyvisa/errors.py
Raises:
visa.VisaIOError: if ``ret_code`` indicates a communication
problem.
"""
if ret_code != 0:
raise visa.VisaIOError(ret_code)