COUNT = 2048
FREQ = 2000
#You must set up both DAC channels with the same settings, or the output will be
#incorrect. However, the buffer values may be different.
#set initial values for the buffers
#the buffer values must be interleaved, a 2D buffer is teh best way to do this
#The signals are dynamically updated square waves which will rise in Vmrs but
#retain the same Vpp
buf0 = np.zeros((COUNT), dtype=np.uint16)
buf1 = np.zeros((COUNT), dtype=np.uint16) + 60000
buf = (np.column_stack((buf0,buf1)))
buf_flatten = buf.flatten()
devName = daq.GetDeviceList()[0]
print "Connecting to %s\n\n" % devName
handle = daq.Open(devName)
if handle == -1:
print "Cannot conncet to device\n"
print "Exit"
sys.exit(handle)
#settings for channel 0
#Set for a static waveform
daq.DacSetOutputMode(handle, daqh.DddtLocal, 0, daqh.DdomDynamicWave);
#Immediate Trigger, (the final paramater is not yet used)
daq.DacWaveSetTrig(handle, daqh.DddtLocal, 0, daqh.DdtsImmediate, 0)
#Use the Local DAC clock
daq.DacWaveSetClockSource(handle, daqh.DddtLocal, 0, daqh.DdcsDacClock)
#Set the frequency
STOPSOURCE = DatsScanCount
CHANCOUNT = 1
SCANS = 1000
RATE = 100 #Hz
#used to configure scan
buffer = np.zeros((SCANS * CHANCOUNT, ),
dtype=np.uint16) #WORD buffer[SCANS*CHANCOUNT];
gains = [DgainDbd3kX1] #gains[0] = DgainDbd3kX1; #gain of X1
channels = [0] #channels[0] = 0; #select channel 0
flags = [DafBipolar] #flags[0] = DafBipolar; #select Bipolar mode
# This is the default name for a DaqBoard3000 when configured through the
# Control Panel Applet. If you have named your device differently than the default,
# it must be changed here for this example to function.
devName = daq.GetDeviceList()[0] #find 1st IOtech device
print "Connected to %s\n\n" % devName
handle = daq.Open(devName)
if handle == -1:
print "Cannot conncet to device\n"
print "Exit"
sys.exit(handle)
print "Setting up scan...\n"
daq.AdcSetAcq(handle, DaamNShot, 0, SCANS)
#Scan settings
daq.AdcSetScan(handle, channels, gains, flags)
#set scan rate
daq.AdcSetFreq(handle, RATE)
def __init__(self):
self.devName = daq.GetDeviceList()[0] # Find 1st IOtech device