make computation with many voltageRatio

[YLM]

Hi,

I am using a phidget bridge input in order to receive data from many load cell, then I'd like to make computation between the different signal I receive.

Here is what I tried but I got an error :
t = channel0 + channel1
UnboundLocalError: local variable 'channel0' referenced before assignment

Code: Select all

A0 = 1
B0 = 0
offset = 0 # 10.45
channel0 = 0
channel1 = 0

def onVoltageRatioChange(self, voltageRatio):
	Masse = (voltageRatio - (B0) ) / (A0) + offset

	if(self.getChannel() == 0):
		channel0 = voltageRatio

	if(self.getChannel() == 1):
		channel1 = voltageRatio

	t = channel0 + channel1
	print(t)

def main():

	voltageRatioInput0 = VoltageRatioInput()
	voltageRatioInput1 = VoltageRatioInput()
	voltageRatioInput2 = VoltageRatioInput()
	voltageRatioInput3 = VoltageRatioInput()

	voltageRatioInput0.setChannel(0)
	voltageRatioInput1.setChannel(1)
	voltageRatioInput2.setChannel(2)
	voltageRatioInput3.setChannel(3)

	voltageRatioInput0.setOnVoltageRatioChangeHandler(onVoltageRatioChange)
	voltageRatioInput1.setOnVoltageRatioChangeHandler(onVoltageRatioChange)
	voltageRatioInput2.setOnVoltageRatioChangeHandler(onVoltageRatioChange)
	voltageRatioInput3.setOnVoltageRatioChangeHandler(onVoltageRatioChange)

	voltageRatioInput0.openWaitForAttachment(TIME_OUT)
	voltageRatioInput1.openWaitForAttachment(TIME_OUT)
	voltageRatioInput2.openWaitForAttachment(TIME_OUT)
	voltageRatioInput3.openWaitForAttachment(TIME_OUT)

	voltageRatioInput0.setDataInterval(DATA_INTERVAL)
	voltageRatioInput1.setDataInterval(DATA_INTERVAL)
	voltageRatioInput2.setDataInterval(DATA_INTERVAL)
	voltageRatioInput3.setDataInterval(DATA_INTERVAL)


	while True:
		time.sleep(10)

		voltageRatioInput0.close()
		voltageRatioInput1.close()
		voltageRatioInput2.close()
		voltageRatioInput3.close()

main()