read and write with stream

1 files changed, 21 insertions, 2 deletions

diff --git a/labjackStreamTest.py b/labjackStreamTest.py
index d4c6a9e..c5368ea 100644
--- a/labjackStreamTest.py
+++ b/labjackStreamTest.py
@@ -1,16 +1,18 @@
 import sys
 import traceback
+import time  # For sleep, clock, time and perf_counter
 from datetime import datetime
 
 import u3
 import u6
 import ue9
 
+dacAddress = 5000  # DAC Modbus address
 
 # MAX_REQUESTS is the number of packets to be read.
 MAX_REQUESTS = 75
 # SCAN_FREQUENCY is the scan frequency of stream mode in Hz
-SCAN_FREQUENCY = 5000
+SCAN_FREQUENCY = 1000
 
 d = None
 
@@ -73,7 +75,7 @@ c['AINSlopes']['0']= 0.0000775030
 
 print("Configuring UE9 stream")
 
-d.streamConfig(NumChannels=2, ChannelNumbers=[0, 1], ChannelOptions=[0, 0], SettlingTime=0, Resolution=12, ScanFrequency=SCAN_FREQUENCY)
+d.streamConfig(NumChannels=4, ChannelNumbers=[0, 1, 2, 3], ChannelOptions=[0, 0, 0, 0], SettlingTime=0, Resolution=12, ScanFrequency=SCAN_FREQUENCY)
 '''
 '''
 
@@ -86,6 +88,13 @@ Exiting...""")
 
 try:
     print("Start stream")
+    d.writeRegister(dacAddress, 2.05)
+    # d.singleIO(IOType=5, Channel=0, DAC=0)
+    dacNumber=0
+    bits = d.voltageToDACBits(1.4, dacNumber = dacNumber)
+    out=d.singleIO(IOType=5, Channel=dacNumber, DAC=bits)
+    print(out)
+    
     d.streamStart()
     start = datetime.now()
     print("Start time is %s" % start)
@@ -93,8 +102,14 @@ try:
     missed = 0
     dataCount = 0
     packetCount = 0
+    v=0.1
 
     for r in d.streamData():
+        # d.writeRegister(dacAddress, 0.05*dataCount)
+        v=v+0.1
+        print(v)
+        bits = d.voltageToDACBits(v, dacNumber = dacNumber)
+        out=d.singleIO(IOType=5, Channel=dacNumber, DAC=bits)
         if r is not None:
             # Our stop condition
             if dataCount >= MAX_REQUESTS:
@@ -111,6 +126,10 @@ try:
                 missed += r['missed']
                 print("+++ Missed %s" % r["missed"])
 
+            if r["firstPacket"] != packetCount % 256:
+                print("----- Overflow skipping packets : expected %s got %s ; %s" %
+                      (packetCount, r["firstPacket"], datetime.now()))
+
             # Comment out these prints and do something with r
             print("Average of %s AIN0, %s AIN1 readings: %s, %s" %
                   (len(r["AIN0"]), len(r["AIN1"]), sum(r["AIN0"])/len(r["AIN0"]), sum(r["AIN1"])/len(r["AIN1"])))