checkpoint_2c.py

import webiopi
from webiopi.devices.analog import MCP3208, MCP4922

ADC0 = MCP3208(chip = 0)
DAC1 = MCP4922(chip = 1)

print("Number of DAC1 Outputs: {0} ").format(DAC1.analogCount())

vout = 1.0
vref = DAC1.analogReference()
print "vref {0} {1}".format(vref, ADC0.analogReference())

while (vout < vref):
  print "\nSetting output to {0}V on channel 0 of DAC1".format(vout)
  for i in range(DAC1.analogCount()):
    DAC1.analogWriteVolt(i, vout) # set volatage of output channel VoutA to vout
    webiopi.sleep(2.0)
    print("DAC1 output voltage of channel {0} {1}").format(i,  DAC1.analogReadVolt(i))
    print("ADC0 input voltage of  channel {0} {1}").format(i,   ADC0.analogReadVolt(i))
    print " "
  vout += 0.2