59 lines
1.5 KiB
Python
59 lines
1.5 KiB
Python
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"""Siglent SPD3303X-E PSU controller over VXI-11 / SCPI.
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Drives the display 3.3 V rail so the master loop can power-cycle the PCB
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between captures.
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"""
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from __future__ import annotations
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import logging
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import time
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import vxi11
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from config import (
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PSU_CHANNEL_DISPLAY,
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PSU_DISPLAY_CURRENT,
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PSU_DISPLAY_VOLTAGE,
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PSU_POWER_CYCLE_DELAY_S,
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)
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log = logging.getLogger(__name__)
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class PSUController:
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def __init__(self, ip: str) -> None:
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self.ip = ip
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self._inst = vxi11.Instrument(ip)
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idn = self._inst.ask("*IDN?").strip()
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log.info("PSU connected: %s", idn)
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self.idn = idn
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ch = PSU_CHANNEL_DISPLAY
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self._inst.write(f"CH{ch}:VOLTage {PSU_DISPLAY_VOLTAGE}")
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self._inst.write(f"CH{ch}:CURRent {PSU_DISPLAY_CURRENT}")
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self.output_off()
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def output_on(self) -> None:
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self._inst.write(f"OUTPut CH{PSU_CHANNEL_DISPLAY},ON")
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def output_off(self) -> None:
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self._inst.write(f"OUTPut CH{PSU_CHANNEL_DISPLAY},OFF")
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def power_cycle(self, delay_s: float = PSU_POWER_CYCLE_DELAY_S) -> None:
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self.output_off()
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time.sleep(delay_s)
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self.output_on()
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def measure(self) -> dict:
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ch = PSU_CHANNEL_DISPLAY
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voltage = float(self._inst.ask(f"MEASure:VOLTage? CH{ch}"))
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current = float(self._inst.ask(f"MEASure:CURRent? CH{ch}"))
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return {"voltage_v": voltage, "current_a": current}
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def close(self) -> None:
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try:
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self._inst.close()
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except Exception:
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pass
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