Complete pl1000Examples/pl1000StreamingModeExample.py

Author: neil.hamilton

pl1000Examples/pl1000StreamingModeExample.py

@@ -9,7 +9,7 @@
 import numpy as np
 from picosdk.pl1000 import pl1000 as pl
 import matplotlib.pyplot as plt
-from picosdk.functions import adc2mV, assert_pico_ok
+from picosdk.functions import adc2mVpl1000, assert_pico_ok
 from time import sleep
 
 # Create chandle and status ready for use
@@ -22,25 +22,43 @@
 
 # set sampling interval
 usForBlock = ctypes.c_uint32(10000000)
-noOfValues = ctypes.c_uint32(100000000)
+noOfValues = ctypes.c_uint32(1000000)
 channels = ctypes.c_int16(1)
 
 status["setInterval"] = pl.pl1000SetInterval(chandle, ctypes.byref(usForBlock), noOfValues, ctypes.byref(channels), 1)
 assert_pico_ok(status["setInterval"])
 
 # start streaming
 mode = pl.PL1000_BLOCK_METHOD["BM_STREAM"]
-status["run"] = pl.pl1000Run(chandle, noOfValues, mode)
+status["run"] = pl.pl1000Run(chandle, 1000000, mode)
 assert_pico_ok(status["run"])
 
-sleep(5)
+sleep(usForBlock.value / 1000000)
 
-values = (ctypes.c_uint16 * noOfValues)()
+values = (ctypes.c_uint16 * noOfValues.value)()
 oveflow = ctypes.c_uint16()
 
 status["getValues"] = pl.pl1000GetValues(chandle, ctypes.byref(values), ctypes.byref(noOfValues), ctypes.byref(oveflow), None)
 assert_pico_ok(status["getValues"])
 
+# convert ADC counts data to mV
+maxADC = ctypes.c_uint16()
+status["maxValue"] = pl.pl1000MaxValue(chandle, ctypes.byref(maxADC))
+assert_pico_ok(status["maxValue"])
+inputRange = 2500
+mVValues =  adc2mVpl1000(values, inputRange, maxADC)
+
+# create time data
+interval = (0.01 * usForBlock.value)/(noOfValues.value * 1)
+
+timeMs = np.linspace(0, (len(mVValues)) * interval, len(mVValues))
+
+# plot data
+
+plt.plot(timeMs, mVValues[:])
+plt.xlabel('Time (ms)')
+plt.ylabel('Voltage (mV)')
+plt.show()
 
 # close PicoLog 1000 device
 status["closeUnit"] = pl.pl1000CloseUnit(chandle)