Updates

looper.py

@@ -6,11 +6,33 @@ import time
 import sys
 from pathlib import Path
 from datetime import datetime
+import pyvisa
+import vxi11
 
 # Initial state
 toggle_state = 0
 
-ser = serial.Serial(port='/dev/ttyACM0', baudrate=115200)
+#ser = serial.Serial(port='/dev/ttyACM0', baudrate=115200)
+
+VISA_ADDRESS = "TCPIP::192.168.45.3::INSTR" 
+
+rm = pyvisa.ResourceManager()
+
+SPD = rm.open_resource(
+    VISA_ADDRESS,
+    write_termination='\n',
+    read_termination='\n'
+)
+
+class DS1202ZE(vxi11.Instrument):
+    def __init__(self, host, *args, **kwargs):
+        super(DS1202ZE, self).__init__(host, *args, **kwargs)
+    def get_identification(self):
+        return self.ask("*IDN?")
+    def get_vavg_channel1(self):
+        return self.ask(":MEAS:ITEM? VAVG, CHAN1\n")
+    def get_vavg_channel2(self):
+        return self.ask(":MEAS:ITEM? VAVG, CHAN2\n")
 
 class Tee(object):
     def __init__(self, filename):
@@ -56,6 +78,24 @@ def pack_integers_to_bytes(*integers: int) -> bytes:
     
     return struct.pack(format_string, *full_packet)
 
+def set_voltage():
+    global SPD
+
+    voltage = random.randint(9, 30)
+    voltage_f = float(voltage)
+    
+    SPD.write('CH1:VOLT ' + str(voltage_f))  # Send power supply source voltage
+
+    print(f"[{time.strftime('%H:%M:%S')}] VOLTAGE SET TO: " + str(voltage) + "V")
+
+    # Schedule the NEXT random trigger
+    # random.uniform(60, 360) provides the random delay in seconds
+    delay = random.uniform(60, 360)
+    
+    # Create and start a new timer thread
+    timer = threading.Timer(delay, set_voltage)
+    timer.start()
+
 def trigger_serial_command():
     global toggle_state
     global ser
@@ -65,19 +105,14 @@ def trigger_serial_command():
     toggle_state = 1 - toggle_state
 
     if toggle_state == 0:
-        voltage = 0
-        voltage_mv = 0
         state = 0
 
-        print("VOLTAGE SET TO: OFF")
+        print(f"[{time.strftime('%H:%M:%S')}] SWITCH SET TO: OFF")
 
     else:
-        # Generate voltage level
-        voltage = random.randint(9, 30)
-        voltage_mv = voltage * 1000
         state = 1
         
-        print("VOLTAGE SET TO: " + str(voltage) + "V")
+        print(f"[{time.strftime('%H:%M:%S')}] SWITCH SET TO: ON")
     
     # Serial logic
     print(f"[{time.strftime('%H:%M:%S')}] SENDING SERIAL COMMAND...")
@@ -86,12 +121,12 @@ def trigger_serial_command():
 
     data = (command, state)
     byte_data = pack_integers_to_bytes(*data)
-    ser.write(serial.to_bytes(byte_data)) 
+    #ser.write(serial.to_bytes(byte_data)) 
     
     # Schedule the NEXT random trigger
     # random.uniform(0.1, 100.0) provides the random delay in seconds
     delay = random.uniform(min_delay_input_f, max_delay_input_f)
-    print(f"NEXT COMMAND IN {delay:.2f} SECONDS...")
+    print(f"[{time.strftime('%H:%M:%S')}] NEXT COMMAND IN {delay:.2f} SECONDS...")
 
     # Create and start a new timer thread
     timer = threading.Timer(delay, trigger_serial_command)
@@ -106,27 +141,33 @@ if __name__ == '__main__':
     build_path = "~/Python/Automotive-Power-Simulator-App/LOGS/" + timestamp_str + ".txt"
     log_file = Path(build_path).expanduser()
     sys.stdout = Tee(log_file)
-    print("LOGGING TO: " + str(log_file))
+    print(f"[{time.strftime('%H:%M:%S')}] LOGGING TO: " + str(log_file))
+
+    SPD.write('CH1:VOLT ' + str(24.0))  # Send power supply source voltage
+    SPD.write('CH1:CURR ' + str(1.5))   # Send power supply current limit
+
+    # Enable power supply output source
+    SPD.write('OUTP CH1,ON')    # Enable supply output
 
     # Get time constants
-    print ("PLEASE ENTER A MINIMUM DELAY VALUE...")
+    print (f"[{time.strftime('%H:%M:%S')}] PLEASE ENTER A MINIMUM DELAY VALUE...")
 
     min_delay_input = input()
     min_delay_input_f = float(min_delay_input)
 
-    print("MINIMUM TIME DELAY: " + str(min_delay_input_f))
+    print(f"[{time.strftime('%H:%M:%S')}] MINIMUM TIME DELAY: " + str(min_delay_input_f))
 
     # Get time constants
-    print ("PLEASE ENTER A MAXIMUM DELAY VALUE...")
+    print (f"[{time.strftime('%H:%M:%S')}] PLEASE ENTER A MAXIMUM DELAY VALUE...")
 
     max_delay_input = input()
     max_delay_input_f = float(max_delay_input)
 
-    print("MAXIMUM TIME DELAY: " + str(max_delay_input_f))
+    print("f[{time.strftime('%H:%M:%S')}] MAXIMUM TIME DELAY: " + str(max_delay_input_f))
     
     # Start the very first trigger
     trigger_serial_command()
-    # Setup serial port
+    set_voltage()
 
     try:        
         while (1):
@@ -134,16 +175,17 @@ if __name__ == '__main__':
 
     except KeyboardInterrupt:
         state = 0
-        command = 83 # 0x53 'S' ASCII
+        command = 115 # 0x73 's' ASCII
-        voltage_mv = 0
         
-        b1 = (voltage_mv >> 24) & 0xFF  # Most Significant Byte
+        data = (command, state)
-        b2 = (voltage_mv >> 16) & 0xFF
-        b3 = (voltage_mv >> 8) & 0xFF
-        b4 = voltage_mv  & 0xFF
-        
-        data = (command, state, b1, b2, b3, b4)
         byte_data = pack_integers_to_bytes(*data)
-        ser.write(serial.to_bytes(byte_data)) 
+        #ser.write(serial.to_bytes(byte_data)) 
 
-        ser.close()
+        #ser.close()
+
+        SPD.write('CH1:VOLT ' + str(0.0))  # Send power supply source voltage
+        SPD.write('CH1:CURR ' + str(0.0))  # Send power supply current limit
+
+        # Disable power supply output source
+        SPD.write('OUTP CH1,OFF')
+        SPD.close()