## 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
pass
class Decoder(srd.Decoder):
- api_version = 2
+ api_version = 3
id = 'stepper_motor'
name = 'Stepper motor'
longname = 'Stepper motor position / speed'
- desc = 'Calculate absolute position and movement speed from step/dir signals.'
+ desc = 'Absolute position and movement speed from step/dir.'
license = 'gplv2+'
inputs = ['logic']
outputs = ['stepper_motor']
('position', 'Position', (1,)),
)
- def __init__(self, **kwargs):
+ 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
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:
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)