added class & tested with hw

322e8bed · Alén Arias Vázquez · 7bb21739 · 322e8bed
Commit 322e8bed authored Mar 22, 2022 by Alén Arias Vázquez 😎
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cpx400dp.py cpx400dp/cpx400dp.py +91 -0

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--- a/cpx400dp/cpx400dp.py
+++ b/cpx400dp/cpx400dp.py
+import sys
+import serial
+import logging, logging.config
+import argparse
+
+class CPX400DP(object):
+
+    def __init__(self, name='CPX400DP', devname='/dev/tty_CPX', baudrate=115200, log_level=logging.INFO):
+        logging.basicConfig(format='%(asctime)s-%(name)s-%(levelname)-s %(message)s', datefmt='%Y-%m-%d %I:%M:%S', level=log_level)
+        self.name = name
+        self.log = logging.getLogger(self.name)
+        try:
+            self.serial=serial.Serial(devname, baudrate)
+            self.log.info("Opening device {}".format(self.serial.name))
+        except:
+            self.log.error("Failed to open device {}".format(self.serial.name))
+
+    def close(self):
+        self.serial.close()
+
+    def send_cmd(self, cmd):
+        self.serial.write(bytes(cmd.encode('utf-8')))
+
+    def recv_cmd(self):
+        return self.serial.readline()
+
+    def setVoltage(self, volts, chan=1):
+        self.log.info("Set oltage {}V in channel {}".format(volts,chan))
+        cmd='V'+str(chan)+' '+str(volts)+'\n'
+        self.send_cmd(cmd)
+
+    def getVoltage(self, chan=1):
+        cmd='V'+str(chan)+'O?\n'
+        self.send_cmd(cmd)
+        answer=self.recv_cmd()
+        self.log.info("Channel {} ---- {}}V".format(chan,float(answer[:-3])))
+        return float(answer[:-3])
+
+    def setCurrent(self, amps, chan=1):
+        self.log.info("Set current to {}A in channel {}".format(amps,chan))
+        cmd='I'+str(chan)+' '+str(amps)+'\n'
+        self.send_cmd(cmd)
+
+    def getCurrent(self, chan=1):
+        cmd='I'+str(chan)+'O?\n'
+        self.send_cmd(cmd)
+        answer=self.recv_cmd()
+        self.log.info("Channel {} ---- {}A".format(chan,float(answer[:-3])))
+        return float(answer[:-3])
+
+    def unlock(self):
+        cmd='IFUNLOCK\n'
+        self.send_cmd(cmd)
+
+    def lock(self):
+        cmd='IFLOCK\n'
+        self.send_cmd(cmd)
+
+    def switchOn(self, chan=1):
+        cmd='OP'+str(chan)+' 1\n'
+        self.log.info("Turning ON Channel {}".format(chan))
+        self.send_cmd(cmd)
+
+    def switchOff(self, chan=1):
+        cmd='OP'+str(chan)+' 0\n'
+        self.log.info("Turning OFF Channel {}".format(chan))
+        self.send_cmd(cmd)
+
+    def setup(self, chan=1, volts=10.0, amps=0.3):
+        self.setVoltage(volts=volts, chan=chan)
+        self.setCurrent(amps=amps, chan=chan)
+        self.switchOn(chan=chan)
+
+def main():
+    parser = argparse.ArgumentParser(description='Control CPX400DP from USB', formatter_class=argparse.ArgumentDefaultsHelpFormatter)
+    parser.add_argument('--device',     "-D", type=str,   default='/dev/tty_CPX', help="Linux device name")
+    parser.add_argument('--baudrate',   "-b", type=int,   default=115200,         help="Serial baudrate")
+    parser.add_argument('--chan',       "-C", type=int,   default=1,              help="Channel selector")
+    parser.add_argument('--volts',      "-V", type=float, default=12.0,           help="Volts")
+    parser.add_argument('--amps',       "-A", type=float, default=0.2,            help="Amps")
+    parser.add_argument("--powerup", action='store_true', help="Switch On requested channel with requested values")
+    args = parser.parse_args()
+    psu=CPX400DP(name='CPX400DP', devname=args.device, baudrate=args.baudrate, log_level=logging.INFO)
+    if args.powerup:
+        psu.setup(chan=args.chan, volts=args.volts, amps=args.amps)
+    else:
+        psu.switchOff(chan=args.chan)
+    psu.close()
+
+if __name__ == '__main__':
+    sys.exit(main())