Hardware Test Infrastructure with TofuPilot

from tofupilot import TofuPilotClient
import pyvisa

# Instrument layer
rm = pyvisa.ResourceManager()
dmm = rm.open_resource("TCPIP::192.168.1.10::INSTR")
psu = rm.open_resource("TCPIP::192.168.1.11::INSTR")

# Test logic
def run_functional_test(serial_number):
    psu.write("OUTP ON")
    vcc = float(dmm.query("MEAS:VOLT:DC?"))
    current = float(dmm.query("MEAS:CURR:DC?"))
    psu.write("OUTP OFF")

    passed = 3.25 <= vcc <= 3.35 and 30 <= current <= 60

    # Data capture
    client = TofuPilotClient()
    client.create_run(
        procedure_id="BOARD-FUNCTIONAL",
        unit_under_test={"serial_number": serial_number},
        run_passed=passed,
        steps=[{
            "name": "Power Rails",
            "step_type": "measurement",
            "status": 3.25 <= vcc <= 3.35,
            "measurements": [
                {"name": "vcc_3v3", "value": vcc, "unit": "V", "limit_low": 3.25, "limit_high": 3.35},
                {"name": "idle_current_ma", "value": current * 1000, "unit": "mA", "limit_low": 30, "limit_high": 60},
            ],
        }],
    )
    return passed

# Operator interface
while True:
    serial = input("Scan serial (or 'q' to quit): ")
    if serial.lower() == "q":
        break
    result = run_functional_test(serial)
    print(f"{'PASS' if result else 'FAIL'}")

import socket

# Station identification
STATION_ID = socket.gethostname()  # Each station PC has a unique hostname

# Same test code, same procedure, different station
client.create_run(
    procedure_id="BOARD-FUNCTIONAL",
    unit_under_test={"serial_number": serial},
    run_passed=passed,
    steps=steps,
)
# TofuPilot tracks which station ran each test

import pyvisa

class InstrumentPool:
    """Manage instrument connections for a test station."""

    def __init__(self):
        self.rm = pyvisa.ResourceManager()
        self._instruments = {}

    def get(self, name, address):
        if name not in self._instruments:
            self._instruments[name] = self.rm.open_resource(address)
        return self._instruments[name]

    def close_all(self):
        for inst in self._instruments.values():
            inst.close()

# Usage
pool = InstrumentPool()
dmm = pool.get("dmm", "TCPIP::192.168.1.10::INSTR")
psu = pool.get("psu", "TCPIP::192.168.1.11::INSTR")