Reorganize the gamepad code

py/circuitpy_defns.mk

@@ -317,6 +317,7 @@ $(filter $(SRC_PATTERNS), \
 	fontio/BuiltinFont.c \
 	fontio/__init__.c \
 	gamepad/GamePad.c \
+	gamepad/GamePadShift.c \
 	gamepad/__init__.c \
 	os/__init__.c \
 	random/__init__.c \

shared-bindings/gamepad/GamePad.c

@@ -31,19 +31,10 @@
 #include "shared-module/gamepad/__init__.h"
 #include "shared-module/gamepad/GamePad.h"
 #include "shared-bindings/digitalio/DigitalInOut.h"
-#include "shared-bindings/util.h"
 #include "supervisor/shared/translate.h"
 #include "GamePad.h"
+#include "__init__.h"
 
-STATIC digitalio_digitalinout_obj_t *validate_pin(mp_obj_t obj) {
-    if (!MP_OBJ_IS_TYPE(obj, &digitalio_digitalinout_type)) {
-        mp_raise_TypeError(translate("argument num/types mismatch"));
-    }
-    digitalio_digitalinout_obj_t *pin = MP_OBJ_TO_PTR(obj);
-    raise_error_if_deinited(
-        common_hal_digitalio_digitalinout_deinited(pin));
-    return pin;
-}
 
 //| .. currentmodule:: gamepad
 //|
@@ -109,86 +100,20 @@ STATIC mp_obj_t gamepad_make_new(const mp_obj_type_t *type, size_t n_args,
         mp_raise_TypeError(translate("argument num/types mismatch"));
     }
     for (size_t i = 0; i < n_args; ++i) {
-        validate_pin(args[i]);
+        pin_io(args[i]);
     }
     gamepad_obj_t* gamepad_singleton = MP_STATE_VM(gamepad_singleton);
-    if (!gamepad_singleton) {
+    if (!gamepad_singleton ||
+        !MP_OBJ_IS_TYPE(MP_OBJ_FROM_PTR(gamepad_singleton), &gamepad_type)) {
         gamepad_singleton = m_new_obj(gamepad_obj_t);
         gamepad_singleton->base.type = &gamepad_type;
         gamepad_singleton = gc_make_long_lived(gamepad_singleton);
         MP_STATE_VM(gamepad_singleton) = gamepad_singleton;
     }
-    for (size_t i = 0; i < 8; ++i) {
+    gamepad_init(gamepad_singleton, args, n_args);
-        gamepad_singleton->pins[i] = NULL;
+    return MP_OBJ_FROM_PTR(gamepad_singleton);
-    }
-    gamepad_singleton->pulls = 0;
-    for (size_t i = 0; i < n_args; ++i) {
-        digitalio_digitalinout_obj_t *pin = MP_OBJ_TO_PTR(args[i]);
-        if (common_hal_digitalio_digitalinout_get_direction(pin) !=
-            DIRECTION_INPUT) {
-            common_hal_digitalio_digitalinout_switch_to_input(pin, PULL_UP);
-        }
-        digitalio_pull_t pull = common_hal_digitalio_digitalinout_get_pull(pin);
-        if (pull == PULL_NONE) {
-            common_hal_digitalio_digitalinout_set_pull(pin, PULL_UP);
-        }
-        if (pull != PULL_DOWN) {
-            gamepad_singleton->pulls |= 1 << i;
-        }
-        gamepad_singleton->pins[i] = pin;
-    }
-    return MP_OBJ_FROM_PTR(MP_STATE_VM(gamepad_singleton));
 }
 
-
-//| .. class:: GamePadShift(data, clock, latch)
-//|
-//|     Initializes button scanning routines.
-//|
-//|     The ``data``, ``clock`` and ``latch`` parameters are ``DigitalInOut``
-//|     objects connected to the shift register controlling the buttons.
-//|
-//|     They button presses are accumulated, until the ``get_pressed`` method
-//|     is called, at which point the button state is cleared, and the new
-//|     button presses start to be recorded.
-//|
-STATIC mp_obj_t gamepadshift_make_new(const mp_obj_type_t *type, size_t n_args,
-        const mp_obj_t *pos_args, mp_map_t *kw_args) {
-
-    enum { ARG_data, ARG_clock, ARG_latch };
-    static const mp_arg_t allowed_args[] = {
-        { MP_QSTR_data, MP_ARG_REQUIRED | MP_ARG_OBJ },
-        { MP_QSTR_clock, MP_ARG_REQUIRED | MP_ARG_OBJ},
-        { MP_QSTR_latch, MP_ARG_REQUIRED | MP_ARG_OBJ},
-    };
-    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
-    mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args),
-                     allowed_args, args);
-
-    digitalio_digitalinout_obj_t *data_pin = validate_pin(args[ARG_data].u_obj);
-    digitalio_digitalinout_obj_t *clock_pin = validate_pin(args[ARG_clock].u_obj);
-    digitalio_digitalinout_obj_t *latch_pin = validate_pin(args[ARG_latch].u_obj);
-
-    gamepad_obj_t* gamepad_singleton = MP_STATE_VM(gamepad_singleton);
-    if (!gamepad_singleton) {
-        gamepad_singleton = m_new_obj(gamepad_obj_t);
-        gamepad_singleton->base.type = &gamepadshift_type;
-        gamepad_singleton = gc_make_long_lived(gamepad_singleton);
-        MP_STATE_VM(gamepad_singleton) = gamepad_singleton;
-    }
-    gamepad_singleton->pins[0] = NULL;
-    common_hal_digitalio_digitalinout_switch_to_input(data_pin, PULL_NONE);
-    gamepad_singleton->pins[1] = data_pin;
-    common_hal_digitalio_digitalinout_switch_to_output(clock_pin, 0,
-                                                       DRIVE_MODE_PUSH_PULL);
-    gamepad_singleton->pins[2] = clock_pin;
-    common_hal_digitalio_digitalinout_switch_to_output(latch_pin, 1,
-                                                       DRIVE_MODE_PUSH_PULL);
-    gamepad_singleton->pins[3] = latch_pin;
-    return MP_OBJ_FROM_PTR(MP_STATE_VM(gamepad_singleton));
-}
-
-
 //|     .. method:: get_pressed()
 //|
 //|         Get the status of buttons pressed since the last call and clear it.
@@ -230,15 +155,3 @@ const mp_obj_type_t gamepad_type = {
     .make_new = gamepad_make_new,
     .locals_dict = (mp_obj_dict_t*)&gamepad_locals_dict,
 };
-
-STATIC const mp_rom_map_elem_t gamepadshift_locals_dict_table[] = {
-    { MP_OBJ_NEW_QSTR(MP_QSTR_get_pressed),  MP_ROM_PTR(&gamepad_get_pressed_obj)},
-    { MP_OBJ_NEW_QSTR(MP_QSTR_deinit),  MP_ROM_PTR(&gamepad_deinit_obj)},
-};
-STATIC MP_DEFINE_CONST_DICT(gamepadshift_locals_dict, gamepadshift_locals_dict_table);
-const mp_obj_type_t gamepadshift_type = {
-    { &mp_type_type },
-    .name = MP_QSTR_GamePadShift,
-    .make_new = gamepadshift_make_new,
-    .locals_dict = (mp_obj_dict_t*)&gamepadshift_locals_dict,
-};

shared-bindings/gamepad/GamePad.h

@@ -29,6 +29,5 @@
 #define MICROPY_INCLUDED_SHARED_BINDINGS_GAMEPAD_GAMEPAD_H
 
 extern const mp_obj_type_t gamepad_type;
-extern const mp_obj_type_t gamepadshift_type;
 
 #endif // MICROPY_INCLUDED_SHARED_BINDINGS_GAMEPAD_GAMEPAD_H

shared-bindings/gamepad/GamePadShift.c

@@ -0,0 +1,118 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Radomir Dopieralski for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "py/obj.h"
+#include "py/runtime.h"
+#include "py/mphal.h"
+#include "py/gc.h"
+#include "py/mpstate.h"
+#include "shared-module/gamepad/__init__.h"
+#include "shared-module/gamepad/GamePadShift.h"
+#include "supervisor/shared/translate.h"
+#include "GamePadShift.h"
+#include "__init__.h"
+
+
+//| .. class:: GamePadShift(data, clock, latch)
+//|
+//|     Initializes button scanning routines.
+//|
+//|     The ``data``, ``clock`` and ``latch`` parameters are ``DigitalInOut``
+//|     objects connected to the shift register controlling the buttons.
+//|
+//|     They button presses are accumulated, until the ``get_pressed`` method
+//|     is called, at which point the button state is cleared, and the new
+//|     button presses start to be recorded.
+//|
+STATIC mp_obj_t gamepadshift_make_new(const mp_obj_type_t *type, size_t n_args,
+        const mp_obj_t *pos_args, mp_map_t *kw_args) {
+
+    enum { ARG_data, ARG_clock, ARG_latch };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_data, MP_ARG_REQUIRED | MP_ARG_OBJ },
+        { MP_QSTR_clock, MP_ARG_REQUIRED | MP_ARG_OBJ},
+        { MP_QSTR_latch, MP_ARG_REQUIRED | MP_ARG_OBJ},
+    };
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args),
+                     allowed_args, args);
+
+    digitalio_digitalinout_obj_t *data_pin = pin_io(args[ARG_data].u_obj);
+    digitalio_digitalinout_obj_t *clock_pin = pin_io(args[ARG_clock].u_obj);
+    digitalio_digitalinout_obj_t *latch_pin = pin_io(args[ARG_latch].u_obj);
+
+    gamepadshift_obj_t* gamepad_singleton = MP_STATE_VM(gamepad_singleton);
+    if (!gamepad_singleton ||
+        !MP_OBJ_IS_TYPE(MP_OBJ_FROM_PTR(gamepad_singleton),
+                        &gamepadshift_type)) {
+        gamepad_singleton = m_new_obj(gamepadshift_obj_t);
+        gamepad_singleton->base.type = &gamepadshift_type;
+        gamepad_singleton = gc_make_long_lived(gamepad_singleton);
+        MP_STATE_VM(gamepad_singleton) = gamepad_singleton;
+    }
+    gamepadshift_init(gamepad_singleton, data_pin, clock_pin, latch_pin);
+    return MP_OBJ_FROM_PTR(gamepad_singleton);
+}
+
+//|     .. method:: get_pressed()
+//|
+//|         Get the status of buttons pressed since the last call and clear it.
+//|
+//|         Returns an 8-bit number, with bits that correspond to buttons,
+//|         which have been pressed (or held down) since the last call to this
+//|         function set to 1, and the remaining bits set to 0. Then it clears
+//|         the button state, so that new button presses (or buttons that are
+//|         held down) can be recorded for the next call.
+//|
+STATIC mp_obj_t gamepadshift_get_pressed(mp_obj_t self_in) {
+    gamepadshift_obj_t* gamepad_singleton = MP_STATE_VM(gamepad_singleton);
+    mp_obj_t pressed = MP_OBJ_NEW_SMALL_INT(gamepad_singleton->pressed);
+    gamepad_singleton->pressed = 0;
+    return pressed;
+}
+MP_DEFINE_CONST_FUN_OBJ_1(gamepadshift_get_pressed_obj, gamepadshift_get_pressed);
+
+//|     .. method:: deinit()
+//|
+//|         Disable button scanning.
+//|
+STATIC mp_obj_t gamepadshift_deinit(mp_obj_t self_in) {
+    gamepad_reset();
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_1(gamepadshift_deinit_obj, gamepadshift_deinit);
+
+
+STATIC const mp_rom_map_elem_t gamepadshift_locals_dict_table[] = {
+    { MP_OBJ_NEW_QSTR(MP_QSTR_get_pressed),  MP_ROM_PTR(&gamepadshift_get_pressed_obj)},
+    { MP_OBJ_NEW_QSTR(MP_QSTR_deinit),  MP_ROM_PTR(&gamepadshift_deinit_obj)},
+};
+STATIC MP_DEFINE_CONST_DICT(gamepadshift_locals_dict, gamepadshift_locals_dict_table);
+const mp_obj_type_t gamepadshift_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_GamePadShift,
+    .make_new = gamepadshift_make_new,
+    .locals_dict = (mp_obj_dict_t*)&gamepadshift_locals_dict,
+};

shared-bindings/gamepad/GamePadShift.h

@@ -0,0 +1,33 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Radomir Dopieralski for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_GAMEPAD_GAMEPADSHIFT_H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_GAMEPAD_GAMEPADSHIFT_H
+
+extern const mp_obj_type_t gamepadshift_type;
+
+#endif // MICROPY_INCLUDED_SHARED_BINDINGS_GAMEPAD_GAMEPADSHIFT_H

shared-bindings/gamepad/__init__.c

@@ -27,6 +27,21 @@
 #include "py/runtime.h"
 #include "py/mphal.h"
 #include "GamePad.h"
+#include "GamePadShift.h"
+#include "shared-bindings/digitalio/DigitalInOut.h"
+#include "shared-bindings/util.h"
+
+
+// Helper for validating digitalio.DigitalInOut arguments
+digitalio_digitalinout_obj_t *pin_io(mp_obj_t obj) {
+    if (!MP_OBJ_IS_TYPE(obj, &digitalio_digitalinout_type)) {
+        mp_raise_TypeError(translate("argument num/types mismatch"));
+    }
+    digitalio_digitalinout_obj_t *pin = MP_OBJ_TO_PTR(obj);
+    raise_error_if_deinited(
+        common_hal_digitalio_digitalinout_deinited(pin));
+    return pin;
+}
 
 
 //| :mod:`gamepad` --- Button handling

shared-bindings/gamepad/__init__.h

@@ -0,0 +1,33 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Radomir Dopieralski for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_GAMEPAD___INIT___H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_GAMEPAD___INIT___H
+
+digitalio_digitalinout_obj_t *pin_io(mp_obj_t obj);
+
+#endif // MICROPY_INCLUDED_SHARED_BINDINGS_GAMEPAD___INIT___H

shared-module/gamepad/GamePad.c

@@ -0,0 +1,51 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Radomir Dopieralski for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "shared-bindings/digitalio/DigitalInOut.h"
+#include "GamePad.h"
+
+void gamepad_init(gamepad_obj_t *gamepad,
+                  const mp_obj_t pins[], size_t n_pins) {
+    for (size_t i = 0; i < 8; ++i) {
+        gamepad->pins[i] = NULL;
+    }
+    gamepad->pulls = 0;
+    for (size_t i = 0; i < n_pins; ++i) {
+        digitalio_digitalinout_obj_t *pin = MP_OBJ_TO_PTR(pins[i]);
+        if (common_hal_digitalio_digitalinout_get_direction(pin) !=
+            DIRECTION_INPUT) {
+            common_hal_digitalio_digitalinout_switch_to_input(pin, PULL_UP);
+        }
+        digitalio_pull_t pull = common_hal_digitalio_digitalinout_get_pull(pin);
+        if (pull == PULL_NONE) {
+            common_hal_digitalio_digitalinout_set_pull(pin, PULL_UP);
+        }
+        if (pull != PULL_DOWN) {
+            gamepad->pulls |= 1 << i;
+        }
+        gamepad->pins[i] = pin;
+    }
+}

shared-module/gamepad/GamePad.h

@@ -38,4 +38,8 @@ typedef struct {
     uint8_t pulls;
 } gamepad_obj_t;
 
+
+void gamepad_init(gamepad_obj_t *gamepad,
+                  const mp_obj_t pins[], size_t n_pins);
+
 #endif  // MICROPY_INCLUDED_GAMEPAD_GAMEPAD_H

shared-module/gamepad/GamePadShift.c

@@ -0,0 +1,43 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Radomir Dopieralski for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "shared-bindings/digitalio/DigitalInOut.h"
+#include "GamePadShift.h"
+
+
+void gamepadshift_init(gamepadshift_obj_t *gamepadshift,
+                       digitalio_digitalinout_obj_t *data_pin,
+                       digitalio_digitalinout_obj_t *clock_pin,
+                       digitalio_digitalinout_obj_t *latch_pin) {
+    common_hal_digitalio_digitalinout_switch_to_input(data_pin, PULL_NONE);
+    gamepadshift->data_pin = data_pin;
+    common_hal_digitalio_digitalinout_switch_to_output(clock_pin, 0,
+                                                       DRIVE_MODE_PUSH_PULL);
+    gamepadshift->clock_pin = clock_pin;
+    common_hal_digitalio_digitalinout_switch_to_output(latch_pin, 1,
+                                                       DRIVE_MODE_PUSH_PULL);
+    gamepadshift->latch_pin = latch_pin;
+}

shared-module/gamepad/GamePadShift.h

@@ -0,0 +1,48 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Radomir Dopieralski for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_GAMEPAD_GAMEPADSHIFT_H
+#define MICROPY_INCLUDED_GAMEPAD_GAMEPADSHIFT_H
+
+#include <stdint.h>
+
+#include "shared-bindings/digitalio/DigitalInOut.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    digitalio_digitalinout_obj_t* data_pin;
+    digitalio_digitalinout_obj_t* clock_pin;
+    digitalio_digitalinout_obj_t* latch_pin;
+    volatile uint8_t pressed;
+} gamepadshift_obj_t;
+
+
+void gamepadshift_init(gamepadshift_obj_t *gamepadshift,
+                       digitalio_digitalinout_obj_t *data_pin,
+                       digitalio_digitalinout_obj_t *clock_pin,
+                       digitalio_digitalinout_obj_t *latch_pin);
+
+#endif  // MICROPY_INCLUDED_GAMEPAD_GAMEPADSHIFT_H

shared-module/gamepad/__init__.c

@@ -29,6 +29,9 @@
 #include "py/mpstate.h"
 #include "__init__.h"
 #include "GamePad.h"
+#include "GamePadShift.h"
+#include "shared-bindings/gamepad/GamePad.h"
+#include "shared-bindings/gamepad/GamePadShift.h"
 
 #include "shared-bindings/digitalio/DigitalInOut.h"
 
@@ -37,18 +40,16 @@ void gamepad_tick(void) {
     static uint8_t last = 0;
     uint8_t current = 0;
     uint8_t bit = 1;
-    digitalio_digitalinout_obj_t* data_pin;
-    digitalio_digitalinout_obj_t* clock_pin;
-    digitalio_digitalinout_obj_t* latch_pin;
 
-    gamepad_obj_t* gamepad_singleton = MP_STATE_VM(gamepad_singleton);
+    void* singleton = MP_STATE_VM(gamepad_singleton);
-    if (!gamepad_singleton) {
+    if (!singleton) {
         return;
     }
-    if (gamepad_singleton->pins[0]) {
+    if (MP_OBJ_IS_TYPE(MP_OBJ_FROM_PTR(singleton), &gamepad_type)) {
         // buttons connected directly to pins
+        gamepad_obj_t *self = singleton;
         for (int i = 0; i < 8; ++i) {
-            digitalio_digitalinout_obj_t* pin = gamepad_singleton->pins[i];
+            digitalio_digitalinout_obj_t* pin = self->pins[i];
             if (!pin) {
                 break;
             }
@@ -57,25 +58,24 @@ void gamepad_tick(void) {
             }
             bit <<= 1;
         }
-        current ^= gamepad_singleton->pulls;
+        current ^= self->pulls;
-    } else {
+        self->pressed |= last & current;
+    } else if (MP_OBJ_IS_TYPE(MP_OBJ_FROM_PTR(singleton), &gamepadshift_type)) {
         // buttons connected to a shift register
-        data_pin = gamepad_singleton->pins[1];
+        gamepadshift_obj_t *self = singleton;
-        clock_pin = gamepad_singleton->pins[2];
-        latch_pin = gamepad_singleton->pins[3];
 
-        common_hal_digitalio_digitalinout_set_value(latch_pin, 1);
+        common_hal_digitalio_digitalinout_set_value(self->latch_pin, 1);
         for (int i = 0; i < 8; ++i) {
-            common_hal_digitalio_digitalinout_set_value(clock_pin, 0);
+            common_hal_digitalio_digitalinout_set_value(self->clock_pin, 0);
-            if (common_hal_digitalio_digitalinout_get_value(data_pin)) {
+            if (common_hal_digitalio_digitalinout_get_value(self->data_pin)) {
                 current |= bit;
             }
-            common_hal_digitalio_digitalinout_set_value(clock_pin, 1);
+            common_hal_digitalio_digitalinout_set_value(self->clock_pin, 1);
             bit <<= 1;
         }
-        common_hal_digitalio_digitalinout_set_value(latch_pin, 0);
+        common_hal_digitalio_digitalinout_set_value(self->latch_pin, 0);
+        self->pressed |= last & current;
     }
-    gamepad_singleton->pressed |= last & current;
     last = current;
 }