Source code for device_client.client_magnets_psbig

from device_client import DeviceClient
from device.power_supply_magnets import PowerSupply_Magnets


description_template = """
Power supply {amps}A | {volts}V | {kwatts}kW

Start by using the **Set MAX** command (e.g. {amps}A, {volts}V) to set max limits of
current and voltage. If ever in the future the output gets stuck at 0A current,
try running the **Set MAX** command again.

#### Set current
Manually set a current value, see output feedback in values.

- *current* = value in amperes.

Use **Safety I=0A** to quickly cut off the current. At the moment, command
**Stop** does the same thing, but its primary use is to stop the waveform
output (see below).


#### Set waveform + Run waveform
Set a current waveform and they play it using **Run Waveform**. Actual output
is measured and returned as a datafile.

- *data* = 2d array of the waveform points [t, I], time values in seconds,
  current values in amperes. Use following (json) format, indentation and
  linebreaks are optional:
  ```
  [
    [0.0, 0.0],
    [0.2, 10.0],
    [0.3, 30.0]
  ]
  ```
Previews of the waveform and measured output can be viewed in graphs section.
Use **Stop** to stop the waveform output.

Tip: When you refresh the page, anything in the input box disappears. So
sometimes it might be a good idea to prepare the waveform in a text file
outside of this app and then just copy it over.
"""



def connect(name, password, server, serial):
    client = DeviceClient(name, password, logger="big",
       title="Magnetic field: PS Wire",
       description=description_template.format(amps=100, volts=60, kwatts=6))

    hw = PowerSupply_Magnets(
        bus=serial,
        model_name="PCL6000-60",
        log_callback=client.emit_log,
        logger="big",
    )

    def set_max(voltage, current):
        hw.set_maxvoltage(voltage)
        hw.set_maxcurrent(current)
        hw.set_voltage(voltage)
    client.register_command(set_max, "Set MAX", inputs=[{"unit": "V"}, {"unit": "A"}])

    client.register_command(hw.set_current, "Set current", inputs=[{"unit": "A"}])
    # client.register_command(hw.set_voltage, "Set [V]")

    client.register_command(hw.set_waveform, "Set I(t) waveform",
                            pass_self=True, inputs=[{"type": "textArea"}])
    client.register_command(hw.run_waveform, "Run I(t) waveform", pass_self=True)

    def safety_button():
        hw.set_current(0)
    client.register_command(safety_button, "Safety I=0A")

    client.register_command(hw.stop, "Stop")
    client.register_background_task(hw.update_frontend)

    client.keep_server_updated(
        hw.is_ready, 0.2, server, retry_on_error=True
    )