Novation_ZeRO_SL_MkII.py: send transport commands via MIDI control pedal

Author: mzuther

src/PythonMcu/Hardware/Novation_ZeRO_SL_MkII.py

@@ -58,6 +58,7 @@ class Novation_ZeRO_SL_MkII(MidiControllerTemplate):
     _MIDI_CC_FADERS = 0x10
     _MIDI_CC_ENCODERS = 0x38
     _MIDI_CC_KNOBS = 0x08
+    _MIDI_CC_CONTROL_PEDAL = 0x40
 
     _MIDI_CC_BUTTON_BANK_UP = 0x58
     _MIDI_CC_BUTTON_BANK_DOWN = 0x59
@@ -262,6 +263,8 @@ def receive_midi(self, status, message):
                 'self.interconnector.move_vpot_raw(self._MIDI_DEVICE_CHANNEL, 6, %d)',
             self._MIDI_CC_ENCODERS + 7:
                 'self.interconnector.move_vpot_raw(self._MIDI_DEVICE_CHANNEL, 7, %d)',
+            self._MIDI_CC_CONTROL_PEDAL:
+                'self.on_control_pedal(%d & 0x01)',
             self._MIDI_CC_BUTTON_BANK_UP:
                 'self._change_mode_edit(%d & 0x01)',
             self._MIDI_CC_BUTTON_BANK_DOWN:
@@ -496,6 +499,17 @@ def all_leds_off(self):
         self.send_midi_control_change(self._MIDI_CC_CLEAR_ALL_LEDS, 0x00)
 
 
+    # --- pedal handling ---
+
+    def on_control_pedal(self, status):
+        if self.interconnector.is_playing():
+            mcu_command = 'stop'
+        else:
+            mcu_command = 'play'
+
+        self.interconnector.keypress_unregistered(mcu_command, status)
+
+
     # --- mode handling ---
 
     def _set_menu_string(self, menu_strings):

src/PythonMcu/McuInterconnector/McuInterconnector.py

@@ -161,6 +161,7 @@ def __init__(self, mcu_model_id, mcu_connection, \
                      mcu_midi_input, mcu_midi_output, \
                      hardware_controller_class, controller_midi_input, \
                      controller_midi_output, callback_log):
+        self._play_status = False
         self._callback_log = callback_log
 
         eval_controller_init = \
@@ -268,31 +269,40 @@ def withdraw_all_controls(self):
 
     def keypress(self, internal_id, status):
         if internal_id in self._led__hardware_to_mcu:
-            command = 'self._mackie_host_control.keypress_%s(%d)' % \
-                (self._led__hardware_to_mcu[internal_id], status)
-
-            eval(command)
+            mcu_command = self._led__hardware_to_mcu[internal_id]
+            self.keypress_unregistered(mcu_command, status)
             return True
         else:
             return False
 
 
+    def keypress_unregistered(self, mcu_command, status):
+        command = 'self._mackie_host_control.keypress_%s(%d)' % \
+            (mcu_command, status)
+        eval(command)
+
+
     def _set_led(self, mcu_command, status):
         if self._led__mcu_to_hardware[mcu_command]['value'] != status:
             self._led__mcu_to_hardware[mcu_command]['value'] = status
 
-            if self._led__mcu_to_hardware[mcu_command]['midi_switch'] \
-                    is not None:
+            if type(self._led__mcu_to_hardware[mcu_command]['midi_switch']) != \
+                    types.NoneType:
                 self._update_led(mcu_command)
 
 
     def _update_led(self, mcu_command):
-        if self._led__mcu_to_hardware[mcu_command]['midi_switch'] is not None:
+        if type(self._led__mcu_to_hardware[mcu_command]['midi_switch']) != \
+                types.NoneType:
             status = self._led__mcu_to_hardware[mcu_command]['value']
             self._hardware_controller.set_led( \
                 self._led__mcu_to_hardware[mcu_command]['midi_led'], status)
 
 
+    def is_playing(self):
+        return self._play_status
+
+
     # --- hardware controller commands ---
 
     def has_display_7seg(self):
@@ -496,6 +506,11 @@ def set_led_stop(self, status):
 
 
     def set_led_play(self, status):
+        if status:
+            self._play_status = True
+        else:
+            self._play_status = False
+
         self._set_led('play', status)