cjtag: Give each cJTAG state its own annotation class.

[libsigrokdecode.git] / decoders / can / pd.py

diff --git a/decoders/can/pd.py b/decoders/can/pd.py
index faed45e0cc6057730ca7d1889a047df60751ef7d..3dbadc090313cc424feaf13051cf724e82c29108 100644 (file)
--- a/decoders/can/pd.py
+++ b/decoders/can/pd.py
@@ -45,7 +45,7 @@ class Decoder(srd.Decoder):
         {'id': 'sample_point', 'desc': 'Sample point (%)', 'default': 70.0},
     )
     annotations = (
-        ('data', 'CAN payload data'),
+        ('data', 'Payload data'),
         ('sof', 'Start of frame'),
         ('eof', 'End of frame'),
         ('id', 'Identifier'),
@@ -61,7 +61,7 @@ class Decoder(srd.Decoder):
         ('ack-slot', 'ACK slot'),
         ('ack-delimiter', 'ACK delimiter'),
         ('stuff-bit', 'Stuff bit'),
-        ('warnings', 'Human-readable warnings'),
+        ('warning', 'Warning'),
         ('bit', 'Bit'),
     )
     annotation_rows = (
@@ -80,6 +80,16 @@ class Decoder(srd.Decoder):
     def start(self):
         self.out_ann = self.register(srd.OUTPUT_ANN)
 
+    def set_bit_rate(self, bitrate):
+        self.bit_width = float(self.samplerate) / float(bitrate)
+        self.sample_point = (self.bit_width / 100.0) * self.options['sample_point']
+
+    def set_nominal_bitrate(self):
+        self.set_bit_rate(self.options['nominal_bitrate'])
+
+    def set_fast_bitrate(self):
+        self.set_bit_rate(self.options['fast_bitrate'])
+
     def metadata(self, key, value):
         if key == srd.SRD_CONF_SAMPLERATE:
             self.samplerate = value
@@ -130,16 +140,12 @@ class Decoder(srd.Decoder):
         self.dom_edge_snum = self.samplenum
         self.dom_edge_bcount = self.curbit
 
-    def bit_sampled(self):
-        # EMPTY
-        pass
-
     # Determine the position of the next desired bit's sample point.
     def get_sample_point(self, bitnum):
         samplenum = self.dom_edge_snum
-        samplenum += int(self.bit_width * (bitnum - self.dom_edge_bcount))
-        samplenum += int(self.sample_point)
-        return samplenum
+        samplenum += self.bit_width * (bitnum - self.dom_edge_bcount)
+        samplenum += self.sample_point
+        return int(samplenum)
 
     def is_stuff_bit(self):
         # CAN uses NRZ encoding and bit stuffing.
@@ -205,6 +211,9 @@ class Decoder(srd.Decoder):
             if can_rx != 1:
                 self.putx([16, ['CRC delimiter must be a recessive bit']])
 
+            if self.fd:
+                self.set_nominal_bitrate()
+
         # ACK slot bit (dominant: ACK, recessive: NACK)
         elif bitnum == (self.last_databit + self.crc_len + 2):
             ack = 'ACK' if can_rx == 0 else 'NACK'
@@ -408,6 +417,12 @@ class Decoder(srd.Decoder):
         # Get the index of the current CAN frame bit (without stuff bits).
         bitnum = len(self.bits) - 1
 
+        if self.fd and can_rx:
+            if bitnum == 16 and self.frame_type == 'standard' \
+                    or bitnum == 35 and self.frame_type == 'extended':
+                self.dom_edge_seen(force=True)
+                self.set_fast_bitrate()
+
         # If this is a stuff bit, remove it from self.bits and ignore it.
         if self.is_stuff_bit():
             self.putx([15, [str(can_rx)]])
@@ -483,4 +498,3 @@ class Decoder(srd.Decoder):
                     self.dom_edge_seen()
                 if self.matched[0]:
                     self.handle_bit(can_rx)
-                    self.bit_sampled()