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"""
devices/serial_device.py
Serial / UART device module — reads data from a serial port.
Parses CSV-format lines: "ch0,ch1,ch2,...\\n"
"""
import random
import time
from typing import Any, Dict
from PyQt6.QtWidgets import (
QWidget, QVBoxLayout, QFormLayout, QGroupBox,
QComboBox, QSpinBox, QLineEdit, QPushButton, QLabel
)
from devices.base_device import BaseDevice, ChannelConfig, DeviceInfo, DeviceStatus
SER_COLORS = ["#7fff6e", "#4cc9f0", "#f72585", "#00d4ff"]
class SerialDevice(BaseDevice):
DEVICE_TYPE = "serial"
ICON = "⇌"
def __init__(self, device_id: str = "ser_0", port: str = "COM3",
baud_rate: int = 115200, num_channels: int = 4,
simulate: bool = True):
channels = [
ChannelConfig(
channel_id=f"s{i}", name=f"Serial {i}",
unit="", min_value=0.0, max_value=1023.0,
color=SER_COLORS[i % len(SER_COLORS)]
)
for i in range(num_channels)
]
info = DeviceInfo(
device_id=device_id, name="Serial / UART",
device_type=self.DEVICE_TYPE,
description=f"Serial port {port} @ {baud_rate} baud",
icon=self.ICON, channels=channels
)
super().__init__(info)
self.port = port
self.baud_rate = baud_rate
self.simulate = simulate
self._serial = None # Replace with serial.Serial() for real hardware
self._t0 = 0.0
def connect(self) -> bool:
if self.simulate:
self._t0 = time.time()
self.status = DeviceStatus.SIMULATED
return True
try:
import serial
self._serial = serial.Serial(self.port, self.baud_rate, timeout=0.1)
self.status = DeviceStatus.CONNECTED
return True
except Exception as e:
print(f"[SerialDevice] Connect failed: {e}")
self.status = DeviceStatus.ERROR
return False
def disconnect(self) -> None:
if self._serial:
try:
self._serial.close()
except Exception:
pass
self.status = DeviceStatus.DISCONNECTED
def read_channels(self) -> Dict[str, float]:
if self.simulate:
return self._simulate_read()
if not self._serial or not self._serial.is_open:
return {}
try:
line = self._serial.readline().decode("utf-8").strip()
if not line:
return {}
parts = line.split(",")
return {
ch.channel_id: float(parts[i])
for i, ch in enumerate(self.info.channels)
if i < len(parts)
}
except Exception:
return {}
def _simulate_read(self) -> Dict[str, float]:
t = time.time() - self._t0
import math
return {
ch.channel_id: round(512 + 400 * math.sin(2 * 3.14159 * (0.2 + i * 0.15) * t)
+ random.gauss(0, 5), 1)
for i, ch in enumerate(self.info.channels)
}
def write_channel(self, channel_id: str, value: Any) -> bool:
if self._serial and self._serial.is_open:
try:
cmd = f"{channel_id}:{value}\n"
self._serial.write(cmd.encode())
return True
except Exception:
return False
return False
def get_config_widget(self) -> QWidget:
w = QWidget()
layout = QVBoxLayout(w)
grp = QGroupBox("Serial Port Settings")
form = QFormLayout(grp)
self._port_edit = QLineEdit(self.port)
form.addRow("Port:", self._port_edit)
self._baud_cb = QComboBox()
self._baud_cb.addItems(["9600", "19200", "38400", "57600", "115200", "230400", "460800"])
self._baud_cb.setCurrentText(str(self.baud_rate))
form.addRow("Baud Rate:", self._baud_cb)
parity_cb = QComboBox()
parity_cb.addItems(["None", "Even", "Odd"])
form.addRow("Parity:", parity_cb)
bits_cb = QComboBox()
bits_cb.addItems(["8", "7"])
form.addRow("Data Bits:", bits_cb)
apply_btn = QPushButton("Apply & Reconnect")
form.addRow(apply_btn)
layout.addWidget(grp)
layout.addStretch()
return w
|
