all decoders: introduce a reset() method

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

diff --git a/decoders/stepper_motor/pd.py b/decoders/stepper_motor/pd.py
index 7664fc4290bc1836343ff633dc924af070acc37d..9ddc6453200366a2c55b000dd866097c0b4a5727 100644 (file)
--- a/decoders/stepper_motor/pd.py
+++ b/decoders/stepper_motor/pd.py
@@ -14,8 +14,7 @@
 ## GNU General Public License for more details.
 ##
 ## You should have received a copy of the GNU General Public License
-## along with this program; if not, write to the Free Software
-## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+## along with this program; if not, see <http://www.gnu.org/licenses/>.
 ##
 
 import sigrokdecode as srd
@@ -24,7 +23,7 @@ class SamplerateError(Exception):
     pass
 
 class Decoder(srd.Decoder):
-    api_version = 2
+    api_version = 3
     id = 'stepper_motor'
     name = 'Stepper motor'
     longname = 'Stepper motor position / speed'
@@ -51,6 +50,9 @@ class Decoder(srd.Decoder):
     )
 
     def __init__(self):
+        self.reset()
+
+    def reset(self):
         self.oldstep = None
         self.ss_prev_step = None
         self.pos = 0
@@ -87,11 +89,9 @@ class Decoder(srd.Decoder):
         if key == srd.SRD_CONF_SAMPLERATE:
             self.samplerate = value
 
-    def decode(self, ss, es, data):
+    def decode(self):
         if not self.samplerate:
             raise SamplerateError('Cannot decode without samplerate.')
-
-        for (self.samplenum, (step, direction)) in data:
-            if step == 1 and self.oldstep == 0:
-                self.step(self.samplenum, direction)
-            self.oldstep = step
+        while True:
+            step, direction = self.wait({0: 'r'})
+            self.step(self.samplenum, direction)