draft of LMX2487 chip homemade RF Generator control

1 files changed, 59 insertions, 0 deletions

diff --git a/qolab/hardware/rf_generator/qol_lmx2487.py b/qolab/hardware/rf_generator/qol_lmx2487.py
new file mode 100644
index 0000000..1c5d588
--- /dev/null
+++ b/qolab/hardware/rf_generator/qol_lmx2487.py
@@ -0,0 +1,59 @@
+from qolab.hardware.basic import BasicInstrument
+import serial
+
+
+class QOL_LMX2487(RFGenerator):
+    """
+    QOL lab made RF generator based on TI LMX2487 chip.
+    The communication with RF generator is done via nodeMCU controlling esp2866 chip.
+    """
+    def __init__(self, *args,  port='/dev/ttyUSB0', speed=115200, timeout=1, setToDefaults=True, **kwds):
+        super().__init__(*args, **kwds)
+        self.port = port
+        self.speed = speed
+        self.timeout = timeout
+        self.connection = serial.Serial( self.port, self.speed, timeout=self.timeout)
+        self.log = []
+        self.logCapacity = 10
+        self._FreqFixed = None
+        if setToDefaults:
+            self.sendSerialCmd("set_lmx2487_board_to_default_state()")
+
+    def add2log(self, text):
+        self.log.append(text)
+        while len(self.log) > self.logCapacity:
+            self.log.pop(0)
+
+    def log2str(self, interval=None):
+        strOut = ""
+        for e in self.log:
+            strOut += e
+        return strOut
+
+    def sendSerialCmd(self, cmd):
+        self.connection.write(bytes(cmd+'\r','ascii'))
+        if "3.4" == serial.__version__:
+            # older version style
+            resp = self.connection.read_until(terminator=b'> ')
+        else:
+            # new style after 20180616
+            resp = self.connection.read_until(expected=b'> ')
+        resp = resp.decode('utf-8')
+        self.add2log(resp)
+        return resp
+
+    @BasicInstrument.tsdb_append
+    def setFreqFixed(self,freq):
+        self._FreqFixed = freq
+        cmd_str=f'setFreq({freq:.2f})'
+        self.sendSerialCmd(cmd_str)
+
+    @BasicInstrument.tsdb_append
+    def getFreqFixed(self):
+        """
+        getFreqFixed unable to get frequency from hardware.
+        So we use value from previews setFreqFixed.
+        """
+        return self._FreqFixed
+
+