X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=decoders%2Fstepper_motor%2Fpd.py;h=7664fc4290bc1836343ff633dc924af070acc37d;hb=f8a6ae167cf134d0f2dc2c94165f2824a3eb75fe;hp=8a1c2e11eca5b7cf89bb64854b9e55d0c674506f;hpb=92b7b49f6964f57a7d6fc4473645c993cfa4ba52;p=libsigrokdecode.git

diff --git a/decoders/stepper_motor/pd.py b/decoders/stepper_motor/pd.py
index 8a1c2e1..7664fc4 100644
--- a/decoders/stepper_motor/pd.py
+++ b/decoders/stepper_motor/pd.py
@@ -52,7 +52,7 @@ class Decoder(srd.Decoder):
 
     def __init__(self):
         self.oldstep = None
-        self.prev_step_ss = None
+        self.ss_prev_step = None
         self.pos = 0
         self.prev_speed = None
         self.prev_pos = None
@@ -70,18 +70,18 @@ class Decoder(srd.Decoder):
             self.unit = 'mm'
 
     def step(self, ss, direction):
-        if self.prev_step_ss is not None:
-            delta = ss - self.prev_step_ss
+        if self.ss_prev_step is not None:
+            delta = ss - self.ss_prev_step
             speed = self.samplerate / delta / self.scale
             speed_txt = self.format % speed
             pos_txt = self.format % (self.pos / self.scale)
-            self.put(self.prev_step_ss, ss, self.out_ann,
+            self.put(self.ss_prev_step, ss, self.out_ann,
                 [0, [speed_txt + ' ' + self.unit + '/s', speed_txt]])
-            self.put(self.prev_step_ss, ss, self.out_ann,
+            self.put(self.ss_prev_step, ss, self.out_ann,
                 [1, [pos_txt + ' ' + self.unit, pos_txt]])
 
         self.pos += (1 if direction else -1)
-        self.prev_step_ss = ss
+        self.ss_prev_step = ss
 
     def metadata(self, key, value):
         if key == srd.SRD_CONF_SAMPLERATE: