adc final

gex/Client.py

@@ -42,6 +42,11 @@ class Client:
             return TF.STAY
         self.tf.add_type_listener(gex.MSG_UNIT_REPORT, unit_repot_lst)
 
+        # fallback error listener
+        def fallback_lst(tf :TinyFrame, msg :TF_Msg):
+            raise Exception("UNHANDLED MESSAGE! %s" % msg.data.decode('utf-8'))
+        self.tf.add_fallback_listener(fallback_lst)
+
         self.unit_lu = {}
         self.report_handlers = {}
 

gex/PayloadParser.py

@@ -21,7 +21,7 @@ class PayloadParser:
     def _slice(self, n:int) -> bytearray:
         """ Extract a slice and advance the read pointer for the next slice """
         if self.ptr + n > len(self.buf):
-            raise Exception("Out of bounds")
+            raise Exception("Payload parser underrun")
 
         slice = self.buf[self.ptr:self.ptr + n]
         self.ptr += n

gex/TinyFrame.py

@@ -264,6 +264,7 @@ class TinyFrame:
                 actual = self._cksum(self.rpayload)
 
                 if hck != actual:
+                    print("[TF] Header checksum mismatch")
                     self.reset_parser()
                 else:
                     if self.rf.len == 0:
@@ -300,6 +301,7 @@ class TinyFrame:
                 actual = self._cksum(self.rpayload)
 
                 if pck != actual:
+                    print("[TF] Payload checksum mismatch")
                     self.reset_parser()
                 else:
                     self.handle_rx_frame()

gex/units/ADC.py

@@ -1,10 +1,16 @@
+import array
+
 import gex
 from gex import TF, TF_Msg
 from gex.Client import EventReport
 
+import numpy as np
+
 CMD_READ_RAW = 0
 CMD_READ_SMOOTHED = 1
 CMD_GET_ENABLED_CHANNELS = 10
+CMD_GET_SAMPLE_RATE = 11
+
 CMD_SETUP_TRIGGER = 20
 CMD_ARM = 21
 CMD_DISARM = 22
@@ -14,22 +20,22 @@ CMD_BLOCK_CAPTURE = 25
 CMD_STREAM_START = 26
 CMD_STREAM_STOP = 27
 CMD_SET_SMOOTHING_FACTOR = 28
+CMD_SET_SAMPLE_RATE = 29
 
-EVT_CAPT_START = 0
+EVT_CAPT_START = 50
-EVT_CAPT_MORE = 1
+EVT_CAPT_MORE = 51
-EVT_CAPT_DONE = 2
+EVT_CAPT_DONE = 52
-
-EVT_STREAM_START = 10
-EVT_STREAM_DATA = 11
-EVT_STREAM_END = 12
 
 class TriggerReport:
-    def __init__(self, buf, edge, pretrig, timestamp):
+    def __init__(self, data, edge, pretrig, timestamp):
-        self.buf = buf
+        self.data = data
         self.edge = edge
         self.pretrig = pretrig
         self.timestamp = timestamp
 
+    def __str__(self):
+        return "EventReport(edge %d, pretrig len %d, ts %d, data %s)" % (self.edge, self.pretrig, self.timestamp, self.data)
+
 class ADC(gex.Unit):
     """
     ADC device
@@ -50,25 +56,26 @@ class ADC(gex.Unit):
         self._stream_running = False
         self._stream_listener = None
 
+        self.channels = self.get_channels()
+
     def _on_trig_capt(self, msg:TF_Msg):
-        print("Capture")
         pp = gex.PayloadParser(msg.data)
 
         if self._trig_buf is None:
             raise Exception("Unexpected capture data frame")
 
         # All but the first trig capture frame are prefixed by a sequence number
-        if self._trig_next_id != 0:
+
         idx = pp.u8()
         if idx != self._trig_next_id:
-                raise Exception("Lost capture data frame! Expected %d, got %d" % (self._bcap_next_id, idx))
+            raise Exception("Lost capture data frame! Expected %d, got %d" % (self._trig_next_id, idx))
         self._trig_next_id = (self._trig_next_id + 1) % 256
 
         self._trig_buf.extend(pp.tail())
 
         if msg.type == EVT_CAPT_DONE:
             if self._trig_listener is not None:
-                self._trig_listener(TriggerReport(buf=self._trig_buf,
+                self._trig_listener(TriggerReport(data=self._parse_buffer(self._trig_buf),
                                                   edge=self._trig_edge,
                                                   pretrig=self._trig_pretrig_len,
                                                   timestamp=self._trig_ts))
@@ -80,13 +87,12 @@ class ADC(gex.Unit):
             return TF.STAY
 
     def _on_stream_capt(self, msg:TF_Msg):
-        print("Stream data frame")
         pp = gex.PayloadParser(msg.data)
 
         if not self._stream_running:
             raise Exception("Unexpected stream data frame")
 
-        if msg.type == EVT_STREAM_END:
+        if msg.type == EVT_CAPT_DONE:
             if self._stream_listener is not None:
                 self._stream_listener(None) # Indicate it's closed
 
@@ -98,14 +104,14 @@ class ADC(gex.Unit):
             idx = pp.u8()
             if idx != self._stream_next_id:
                 self._stream_running = False
-                raise Exception("Lost stream data frame! Expected %d, got %d" % (self._bcap_next_id, idx))
+                raise Exception("Lost stream data frame! Expected %d, got %d" % (self._stream_next_id, idx))
 
             self._stream_next_id = (self._stream_next_id + 1) % 256
 
             tail = pp.tail()
 
             if self._stream_listener is not None:
-                self._stream_listener(tail)
+                self._stream_listener(self._parse_buffer(tail))
 
             return TF.STAY
 
@@ -120,13 +126,7 @@ class ADC(gex.Unit):
           Type EVT_CAPT_MORE or EVT_CAPT_DONE indicate whether this is the last frame of the sequence,
           after which the ID listener should be removed.
 
-        - EVT_STREAM_START
-          regular GEX event format, payload is the first data block, INCLUDING a numeric prefix (0) - 1 byte
-          Following frames are plain TF frames with type EVT_STREAM_DATA or EVT_STREAM_END, also including the incrementing prefix.
-
         """
-        print("ADC event %d" % evt.code)
-
         pp = gex.PayloadParser(evt.payload)
         msg = evt.msg
 
@@ -136,10 +136,15 @@ class ADC(gex.Unit):
 
             self._trig_ts = evt.timestamp
             self._trig_buf = bytearray()
-            self._trig_edge = pp.u8()
+
             self._trig_pretrig_len = pp.u16()
+
+            self._trig_edge = pp.u8()
+
             self._trig_next_id = 0
             msg.data = pp.tail()
+
+            # the rest is a regular capture frame with seq
             self._on_trig_capt(msg)
             self.client.tf.add_id_listener(msg.id, lambda tf,msg: self._on_trig_capt(msg))
 
@@ -151,6 +156,31 @@ class ADC(gex.Unit):
         msg = self._query(CMD_GET_ENABLED_CHANNELS)
         return list(msg.data)
 
+    def set_sample_rate(self, freq:int):
+        """ Set sample rate in Hz. Returns the real achieved frequency as float. """
+        pb = gex.PayloadBuilder()
+        pb.u32(freq)
+        msg = self._query(CMD_SET_SAMPLE_RATE, pld=pb.close())
+        pp = gex.PayloadParser(msg.data)
+
+        req = pp.u32()
+        real = pp.float()
+
+        return real
+
+    def get_sample_rate(self):
+        """
+        Get the current real sample rate as float.
+        Returns tuple (requested:int, real:float)
+        """
+        msg = self._query(CMD_GET_SAMPLE_RATE)
+        pp = gex.PayloadParser(msg.data)
+
+        req = pp.u32()
+        real = pp.float()
+
+        return (req, real)
+
     def set_smoothing_factor(self, fac, confirm=True):
         """ Set smoothing factor for read_smooth(), range 0-1.0 """
         pb = gex.PayloadBuilder()
@@ -162,9 +192,10 @@ class ADC(gex.Unit):
         msg = self._query(CMD_READ_RAW)
         pp = gex.PayloadParser(msg)
         chs = dict()
+        i = 0
         while pp.length() > 0:
-            idx = pp.u8()
+            chs[self.channels[i]] = pp.u16()
-            chs[idx] = pp.u16()
+            i += 1
         return chs
 
     def read_smooth(self):
@@ -172,9 +203,10 @@ class ADC(gex.Unit):
         msg = self._query(CMD_READ_SMOOTHED)
         pp = gex.PayloadParser(msg)
         chs = dict()
+        i = 0
         while pp.length() > 0:
-            idx = pp.u8()
+            chs[self.channels[i]] = pp.float()
-            chs[idx] = pp.float()
+            i += 1
         return chs
 
     def on_trigger(self, lst):
@@ -267,15 +299,22 @@ class ADC(gex.Unit):
 
         self._send(cmd=CMD_FORCE_TRIGGER, confirm=confirm)
 
+    def _parse_buffer(self, buf):
+        """
+        Convert a raw buffer to a more useful format
+        """
+        arr = np.array(array.array('h', buf))
+        return np.reshape(arr, (-1,len(self.channels)))
+
     def capture_in_progress(self):
         return self._stream_running or self._trig_buf is not None
 
-    def capture(self, count, timeout=5):
+    def capture(self, count, timeout=30):
         """
         Start a block capture.
         This is similar to a forced trigger, but has custom size and doesn't include any pre-trigger.
 
-        The captured data is received synchronously and returned.
+        The captured data is received synchronously and returned as a dict of channel arrays
         """
 
         if self.capture_in_progress():
@@ -305,6 +344,7 @@ class ADC(gex.Unit):
             if frame.type == EVT_CAPT_DONE:
                 self._bcap_done = True
                 return TF.CLOSE
+
             return TF.STAY
 
         self._query_async(cmd=CMD_BLOCK_CAPTURE, pld=pb.close(), callback=lst)
@@ -315,9 +355,10 @@ class ADC(gex.Unit):
         self._stream_running = False
 
         if not self._bcap_done:
+            self.abort()
             raise Exception("Capture not completed within timeout")
 
-        return buffer
+        return self._parse_buffer(buffer)
 
     def on_stream(self, lst):
         self._stream_listener = lst
@@ -336,12 +377,9 @@ class ADC(gex.Unit):
         if lst is not None:
             self._stream_listener = lst
 
-        def str_lst(tf, msg):
+        self._query_async(cmd=CMD_STREAM_START, callback=self._on_stream_capt)
-            self._on_stream_capt(msg)
-
-        self._query_async(cmd=CMD_STREAM_START, callback=str_lst)
 
-    def stream_stop(self, lst, confirm=True):
+    def stream_stop(self, confirm=True):
         """ Stop a stream """
         if not self._stream_running:
             raise Exception("Not streaming")

main.py

@@ -23,13 +23,50 @@ with gex.Client(transport) as client:
 
     if True:
         adc = gex.ADC(client, 'adc')
-        # adc.setup_trigger(1, 700, 10, auto=True, edge="both", holdoff=5000)
+
-        # adc.arm()
+        print(adc.set_sample_rate(40000))
-        # adc.disarm()
+
+        # adc.stream_start(lambda data: print(data))
+        # time.sleep(5)
+        # adc.stream_stop()
+        # time.sleep(.1)
+        # print(adc.get_sample_rate())
+        # time.sleep(.1)
+
+        # adc.stream_stop()
+        # time.sleep(5)
+
+        # print(adc.capture(200, 5))
+
+        adc.setup_trigger(channel=1,
+                          level=700,
+                          count=100,
+                          pretrigger=15,
+                          auto=True,
+                          edge="falling",
+                          holdoff=200,
+                          handler=lambda rpt: print("Report: %s" % rpt))
+
+        print("Armed")
+        adc.arm()
+        print("Sleep...")
         # adc.force()
+        #
+        # # adc.disarm()
+        time.sleep(5)
+        adc.disarm()
+
+        # print(adc.capture(200, 50))
+
+        # adc.stream_start(lambda data: print(data))
+        # time.sleep(20)
+        # adc.stream_stop()
+
+
+        # print(adc.read_raw())
 
         # time.sleep(1)
-        adc.capture(7)
+        # print("Rx: ", resp)
         # adc.abort()
 
     if False: