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lwModbus.py
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lwModbus.py
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from cgi import test
from serial import *
import minimalmodbus
import time
class PSU:
def __init__(self, serialPort, debug):
self.ps = minimalmodbus.Instrument(serialPort, 1, debug=debug, close_port_after_each_call=False) # port name, slave address (in decimal)
self.ps.serial.baudrate = 9600
self.ps.serial.timeout = 0.1
self.ps.serial.parity = minimalmodbus.serial.PARITY_NONE
self.ps.serial.bytesize = 8
self.ps.serial.stopbits = 1
self.ps.mode = minimalmodbus.MODE_RTU
self.values = self.ps.read_registers(0x1000, 6, 3)
self.vSetPoint = 0
self.aSetPoint = 0
self.v = 0
self.a = 0
self.state = 0
self.outputMode = 0
print("Connecting to Power Supply")
self.printStats()
print("Connected to Power Supply via Serial!!!\n")
def getStats(self):
self.values = self.ps.read_registers(0x1000, 6, 3)
self.vSetPoint = self.values[0] / 100
self.aSetPoint = self.values[1] / 1000
self.v = self.values[2] / 100
self.a = self.values[3] / 1000
self.state = self.values[4]
self.outputMode = self.values[5]
if self.state == 1:
self.state = "ON"
elif self.state == 0:
self.state = "OFF"
else:
self.state = "???"
if self.outputMode == 0:
self.outputMode = 'CC'
elif self.outputMode == 1:
self.outputMode = 'CV'
elif self.outputMode == 2:
self.outputMode = 'OC'
else:
self.outputMode = '???'
def setOutputState(self, val):
self.ps.write_register(4102, val, 0 ,6)
time.sleep(0.1)
def setVoltage(self, voltage):
if voltage > 0 and voltage <= 31:
self.ps.write_register(4096, voltage, 2, 6)
time.sleep(0.1)
def setCurrent(self, current):
if current > 0 and current <= 5.1:
self.current = current * 10
self.ps.write_register(4097, self.current, 2, 6)
time.sleep(0.1)
def setVandC(self, voltage, current):
self.setVoltage(voltage)
time.sleep(0.1)
self.setCurrent(current)
time.sleep(0.1)
def getOutputState(self):
return self.state
def printStats(self):
self.getStats()
print("V Setpoint: %s | A Setpoint: %s | State: %s" % (self.vSetPoint, self.aSetPoint, self.state))
print("Output Stats: ")
print("V: %s | A: %s | Mode: %s" % (self.v, self.a, self.outputMode))