Add support for Pimoroni PicoSystem

picosystem/stage.py

@@ -0,0 +1 @@
+../stage.py

picosystem/ugame.py

@@ -0,0 +1,86 @@
+import board
+import analogio
+import stage
+import keypad
+import audiocore
+import audiopwmio
+import time
+import supervisor
+
+
+K_O = 0x01  # A
+K_X = 0x02  # B
+K_SELECT = 0x04  # X
+K_START = 0x08   # Y
+K_Z = 0x08   # Y
+K_DOWN = 0x10
+K_LEFT = 0x20
+K_RIGHT = 0x40
+K_UP = 0x80
+
+
+class _Buttons:
+    def __init__(self):
+        self.keys = keypad.Keys((
+            board.SW_A,
+            board.SW_B,
+            board.SW_X,
+            board.SW_Y,
+            board.SW_DOWN,
+            board.SW_LEFT,
+            board.SW_RIGHT,
+            board.SW_UP
+        ), value_when_pressed=False, pull=True, interval=0.05)
+        self.last_state = 0
+        self.event = keypad.Event(0, False)
+        self.last_z_press = None
+
+    def get_pressed(self):
+        buttons = self.last_state
+        events = self.keys.events
+        while events:
+            if events.get_into(self.event):
+                bit = 1 << self.event.key_number
+                if self.event.pressed:
+                    buttons |= bit
+                    self.last_state |= bit
+                else:
+                    self.last_state &= ~bit
+        if buttons & K_Z:
+            now = time.monotonic()
+            if self.last_z_press:
+                if now - self.last_z_press > 2:
+                    supervisor.set_next_code_file(None)
+                    supervisor.reload()
+            else:
+                self.last_z_press = now
+        else:
+            self.last_z_press = None
+        return buttons
+
+class _Audio:
+    last_audio = None
+
+    def __init__(self):
+        self.muted = True
+        self.buffer = bytearray(128)
+        self.audio = audiopwmio.PWMAudioOut(board.AUDIO)
+
+    def play(self, audio_file, loop=False):
+        if self.muted:
+            return
+        self.stop()
+        wave = audiocore.WaveFile(audio_file, self.buffer)
+        self.audio.play(wave, loop=loop)
+
+    def stop(self):
+        self.audio.stop()
+
+    def mute(self, value=True):
+        self.muted = value
+
+
+audio = _Audio()
+display = board.DISPLAY
+buttons = _Buttons()
+battery = analogio.AnalogIn(board.BAT_SENSE)