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Check temperature & voltage

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This commit is contained in:
Jasper Blanckenburg 2023-01-26 13:58:18 +01:00
parent 7bcafa2c4d
commit a91f9d70db
5 changed files with 101 additions and 7 deletions
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73
load_controller/bms.py
View File

@ -1,7 +1,9 @@
from abc import abstractmethod
import time
from dataclasses import dataclass
from enum import Enum
from .load import Load
from .temperatures import N_SENSORS
from PySide6.QtCore import QObject, Signal, Slot, Qt
@ -15,16 +17,79 @@ SLAVE_UNIT_ID = 0x02
NUM_CELLS = 3
VOLTAGE_QUANT = 1 / 10000.0
THRESH_UV = 2.5
THRESH_OV = 4.2
THRESH_UT = 1
THRESH_OT = 60
class BMSError(Enum):
NONE = 0
UV = 1
OV = 2
UT = 3
OT = 4
def __str__(self):
if self == self.NONE:
return ""
elif self == self.UV:
return "Undervoltage"
elif self == self.OV:
return "Overvoltage"
elif self == self.UT:
return "Undertemperature"
elif self == self.OT:
return "Overtemperature"
else:
return "Unknown error"
@dataclass
class BMSData:
voltages: list[float]
temperatures: list[float]
error: BMSError
class BMS(QObject):
dataUpdated = Signal(BMSData)
_data: BMSData
_load: Load
_num_cells: int
_num_sensors: int
def __init__(self, load: Load, num_cells: int, num_sensors: int):
super().__init__(None)
self._load = load
self._num_cells = num_cells
self._num_sensors = num_sensors
self._data = BMSData([0.0] * num_cells, [0.0] * num_sensors, BMSError.NONE)
def _check_for_errors(self):
error = BMSError.NONE
for v in self._data.voltages:
if v > THRESH_OV:
error = BMSError.OV
break
elif v < THRESH_UV:
error = BMSError.UV
break
for t in self._data.temperatures:
if t > THRESH_OT:
error = BMSError.OT
break
if t < THRESH_UT:
error = BMSError.UT
break
if error != self._data.error:
print(f"Error changed: {error}")
self._data.error = error
self._load.set_error(error != BMSError.NONE)
self.dataUpdated.emit(self._data)
@abstractmethod
def do_work(self):
pass
@ -32,14 +97,12 @@ class BMS(QObject):
class BMSEvalBoard(BMS):
_dev: ModbusSerialClient
_data: BMSData
def __init__(self, uart_path: str, temperaturesUpdated: Signal):
super().__init__(None)
def __init__(self, uart_path: str, temperaturesUpdated: Signal, load: Load):
super().__init__(load, NUM_CELLS, N_SENSORS)
self._dev = ModbusSerialClient(
method="rtu", port=uart_path, baudrate=MODBUS_BAUDRATE
)
self._data = BMSData([0.0] * NUM_CELLS, [0.0] * N_SENSORS)
temperaturesUpdated.connect(
self._updateTemperatures, Qt.ConnectionType.DirectConnection
)
@ -53,10 +116,12 @@ class BMSEvalBoard(BMS):
self._data.voltages = list(
map(lambda v: v * VOLTAGE_QUANT, result.registers)
)
self._check_for_errors()
self.dataUpdated.emit(self._data)
@Slot(list)
def _updateTemperatures(self, temps: list[float]):
assert len(temps) == N_SENSORS
self._data.temperatures = temps
self._check_for_errors()
self.dataUpdated.emit(self._data)

1
load_controller/gui.py
View File

@ -88,3 +88,4 @@ class GUI(QObject):
self._win.setProperty("voltage_max", max(data.voltages))
self._win.setProperty("temp_min", min(data.temperatures))
self._win.setProperty("temp_max", max(data.temperatures))
self._win.setProperty("bmsError", str(data.error))

8
load_controller/load.py
View File

@ -9,6 +9,7 @@ from .profile_handler import ProfileHandler
class Load(QObject):
dev: serial.Serial
_error: bool
_current: float
_timer: QTimer
@ -17,6 +18,7 @@ class Load(QObject):
def __init__(self, uart_path: str, profile_handler: ProfileHandler):
super().__init__(None)
self.dev = serial.Serial(uart_path, 115200)
self._error = False
self._current = 0
self._profile_handler = profile_handler
@ -25,12 +27,16 @@ class Load(QObject):
self._timer.timeout.connect(self._update_load)
self._timer.start(100)
def set_error(self, error):
self._error = error
@Slot()
def _update_current(self, current):
self._current = current
def _update_load(self):
curr_quants = round(self._current / 0.1)
current = 0 if self._error else self._current
curr_quants = round(current / 0.1)
assert curr_quants <= 0xFFFF
msb = curr_quants >> 8

2
main.py
View File

@ -23,7 +23,7 @@ def main(argv: list[str]) -> int:
temps.moveToThread(temp_thread)
temp_thread.started.connect(temps.run)
temp_thread.start()
bms = BMSEvalBoard(argv[3], temps.temperaturesUpdated)
bms = BMSEvalBoard(argv[3], temps.temperaturesUpdated, load)
bms_thread = QThread()
bms.moveToThread(bms_thread)
bms_thread.started.connect(bms.do_work)

24
ui/main_window.qml
View File

@ -18,12 +18,13 @@ ApplicationWindow {
property real voltage_max: 0
property real temp_min: 0
property real temp_max: 0
property string bmsError: ""
property bool bmsErrorVisible: false
Connections {
target: profile_handler
function onCurrentChanged(new_current) {
console.log("currentChanged");
current = new_current;
}
@ -45,6 +46,11 @@ ApplicationWindow {
currentTimeSeries.append(profileTime, 100)
}
onBmsErrorChanged: {
console.log(bmsError);
bmsErrorVisible = bmsError != "";
}
RowLayout {
id: layout
anchors.fill: parent
@ -151,6 +157,22 @@ ApplicationWindow {
Layout.row: 3
Layout.column: 1
}
Text {
text: "BMS Error:"
Layout.row: 4
Layout.column: 0
visible: bmsErrorVisible
color: "red"
font.bold: true
}
Text {
text: bmsError
Layout.row: 4
Layout.column: 1
visible: bmsErrorVisible
color: "red"
font.bold: true
}
}
}