add circuitpython code

3 files changed, 538 insertions, 0 deletions

diff --git a/circuitpython/shared-bindings/rgbmatrix/RGBMatrix.c b/circuitpython/shared-bindings/rgbmatrix/RGBMatrix.c
new file mode 100644
index 0000000..4739807
--- /dev/null
+++ b/circuitpython/shared-bindings/rgbmatrix/RGBMatrix.c
@@ -0,0 +1,447 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Jeff Epler 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/objproperty.h"
+#include "py/runtime.h"
+#include "py/objarray.h"
+
+#include "common-hal/rgbmatrix/RGBMatrix.h"
+#include "shared-bindings/rgbmatrix/RGBMatrix.h"
+#include "shared-bindings/microcontroller/Pin.h"
+#include "shared-bindings/microcontroller/__init__.h"
+#include "shared-bindings/util.h"
+#include "shared-module/displayio/__init__.h"
+#include "shared-module/framebufferio/__init__.h"
+#include "shared-module/framebufferio/FramebufferDisplay.h"
+
+//| class RGBMatrix:
+//|     """Displays an in-memory framebuffer to a HUB75-style RGB LED matrix."""
+//|
+
+extern Protomatter_core *_PM_protoPtr;
+
+STATIC uint8_t validate_pin(mp_obj_t obj) {
+    const mcu_pin_obj_t *result = validate_obj_is_free_pin(obj);
+    return common_hal_mcu_pin_number(result);
+}
+
+STATIC void claim_and_never_reset_pin(mp_obj_t pin) {
+    common_hal_mcu_pin_claim(pin);
+    common_hal_never_reset_pin(pin);
+}
+
+STATIC void claim_and_never_reset_pins(mp_obj_t seq) {
+    mp_int_t len = MP_OBJ_SMALL_INT_VALUE(mp_obj_len(seq));
+    for (mp_int_t i = 0; i < len; i++) {
+        claim_and_never_reset_pin(mp_obj_subscr(seq, MP_OBJ_NEW_SMALL_INT(i), MP_OBJ_SENTINEL));
+    }
+}
+
+STATIC void preflight_pins_or_throw(uint8_t clock_pin, uint8_t *rgb_pins, uint8_t rgb_pin_count, bool allow_inefficient) {
+    uint32_t port = clock_pin / 32;
+    uint32_t bit_mask = 1 << (clock_pin % 32);
+
+    if (rgb_pin_count <= 0 || rgb_pin_count % 6 != 0 || rgb_pin_count > 30) {
+        mp_raise_ValueError_varg(translate("The length of rgb_pins must be 6, 12, 18, 24, or 30"));
+    }
+
+    for (uint8_t i = 0; i < rgb_pin_count; i++) {
+        uint32_t pin_port = rgb_pins[i] / 32;
+
+        if (pin_port != port) {
+            mp_raise_ValueError_varg(
+                translate("rgb_pins[%d] is not on the same port as clock"), i);
+        }
+
+        uint32_t pin_mask = 1 << (rgb_pins[i] % 32);
+        if (pin_mask & bit_mask) {
+            mp_raise_ValueError_varg(
+                translate("rgb_pins[%d] duplicates another pin assignment"), i);
+        }
+
+        bit_mask |= pin_mask;
+    }
+
+    if (allow_inefficient) {
+        return;
+    }
+
+    uint8_t byte_mask = 0;
+    if (bit_mask & 0x000000FF) {
+        byte_mask |= 0b0001;
+    }
+    if (bit_mask & 0x0000FF00) {
+        byte_mask |= 0b0010;
+    }
+    if (bit_mask & 0x00FF0000) {
+        byte_mask |= 0b0100;
+    }
+    if (bit_mask & 0xFF000000) {
+        byte_mask |= 0b1000;
+    }
+
+    uint8_t bytes_per_element = 0xff;
+    uint8_t ideal_bytes_per_element = (rgb_pin_count + 7) / 8;
+
+    switch (byte_mask) {
+        case 0b0001:
+        case 0b0010:
+        case 0b0100:
+        case 0b1000:
+            bytes_per_element = 1;
+            break;
+
+        case 0b0011:
+        case 0b1100:
+            bytes_per_element = 2;
+            break;
+
+        default:
+            bytes_per_element = 4;
+            break;
+    }
+
+    if (bytes_per_element != ideal_bytes_per_element) {
+        mp_raise_ValueError_varg(
+            translate("Pinout uses %d bytes per element, which consumes more than the ideal %d bytes.  If this cannot be avoided, pass allow_inefficient=True to the constructor"),
+            bytes_per_element, ideal_bytes_per_element);
+    }
+}
+
+//|     def __init__(self, *, width: int, bit_depth: int,
+//|                  rgb_pins: Sequence[digitalio.DigitalInOut],
+//|                  addr_pins: Sequence[digitalio.DigitalInOut],
+//|                  clock_pin: digitalio.DigitalInOut,
+//|                  latch_pin: digitalio.DigitalInOut,
+//|                  output_enable_pin: digitalio.DigitalInOut,
+//|                  doublebuffer: bool = True,
+//|                  framebuffer: Optional[WriteableBuffer] = None,
+//|                  height: int = 0, tile: int = 1, serpentine: bool = True) -> None:
+//|         """Create a RGBMatrix object with the given attributes.  The height of
+//|         the display is determined by the number of rgb and address pins and the number of tiles:
+//|         ``len(rgb_pins) // 3 * 2 ** len(address_pins) * abs(tile)``.  With 6 RGB pins, 4
+//|         address lines, and a single matrix, the display will be 32 pixels tall.  If the optional height
+//|         parameter is specified and is not 0, it is checked against the calculated
+//|         height.
+//|
+//|         Up to 30 RGB pins and 8 address pins are supported.
+//|
+//|         The RGB pins must be within a single "port" and performance and memory
+//|         usage are best when they are all within "close by" bits of the port.
+//|         The clock pin must also be on the same port as the RGB pins.  See the
+//|         documentation of the underlying protomatter C library for more
+//|         information.  Generally, Adafruit's interface boards are designed so
+//|         that these requirements are met when matched with the intended
+//|         microcontroller board.  For instance, the Feather M4 Express works
+//|         together with the RGB Matrix Feather.
+//|
+//|         The framebuffer is in "RGB565" format.
+//|
+//|         "RGB565" means that it is organized as a series of 16-bit numbers
+//|         where the highest 5 bits are interpreted as red, the next 6 as
+//|         green, and the final 5 as blue.  The object can be any buffer, but
+//|         `array.array` and ``ulab.ndarray`` objects are most often useful.
+//|         To update the content, modify the framebuffer and call refresh.
+//|
+//|         If a framebuffer is not passed in, one is allocated and initialized
+//|         to all black.  In any case, the framebuffer can be retrieved
+//|         by passing the RGBMatrix object to memoryview().
+//|
+//|         If doublebuffer is False, some memory is saved, but the display may
+//|         flicker during updates.
+//|
+//|         A RGBMatrix is often used in conjunction with a
+//|         `framebufferio.FramebufferDisplay`."""
+//|
+
+STATIC mp_obj_t rgbmatrix_rgbmatrix_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
+    enum { ARG_width, ARG_bit_depth, ARG_rgb_list, ARG_addr_list,
+           ARG_clock_pin, ARG_latch_pin, ARG_output_enable_pin, ARG_doublebuffer, ARG_framebuffer, ARG_height, ARG_tile, ARG_serpentine };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_width, MP_ARG_INT | MP_ARG_REQUIRED | MP_ARG_KW_ONLY },
+        { MP_QSTR_bit_depth, MP_ARG_INT | MP_ARG_REQUIRED | MP_ARG_KW_ONLY },
+        { MP_QSTR_rgb_pins, MP_ARG_OBJ | MP_ARG_REQUIRED | MP_ARG_KW_ONLY },
+        { MP_QSTR_addr_pins, MP_ARG_OBJ | MP_ARG_REQUIRED | MP_ARG_KW_ONLY },
+        { MP_QSTR_clock_pin, MP_ARG_OBJ | MP_ARG_REQUIRED | MP_ARG_KW_ONLY },
+        { MP_QSTR_latch_pin, MP_ARG_OBJ | MP_ARG_REQUIRED | MP_ARG_KW_ONLY },
+        { MP_QSTR_output_enable_pin, MP_ARG_OBJ | MP_ARG_REQUIRED | MP_ARG_KW_ONLY },
+        { MP_QSTR_doublebuffer, MP_ARG_BOOL | MP_ARG_KW_ONLY, { .u_bool = true } },
+        { MP_QSTR_framebuffer, MP_ARG_OBJ | MP_ARG_KW_ONLY, { .u_obj = mp_const_none } },
+        { MP_QSTR_height, MP_ARG_INT | MP_ARG_KW_ONLY, { .u_int = 0 } },
+        { MP_QSTR_tile, MP_ARG_INT | MP_ARG_KW_ONLY, { .u_int = 1 } },
+        { MP_QSTR_serpentine, MP_ARG_BOOL | MP_ARG_KW_ONLY, { .u_bool = true } },
+    };
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    rgbmatrix_rgbmatrix_obj_t *self = &allocate_display_bus_or_raise()->rgbmatrix;
+    self->base.type = &rgbmatrix_RGBMatrix_type;
+
+    uint8_t rgb_count, addr_count;
+    uint8_t rgb_pins[MP_ARRAY_SIZE(self->rgb_pins)];
+    uint8_t addr_pins[MP_ARRAY_SIZE(self->addr_pins)];
+    uint8_t clock_pin = validate_pin(args[ARG_clock_pin].u_obj);
+    uint8_t latch_pin = validate_pin(args[ARG_latch_pin].u_obj);
+    uint8_t output_enable_pin = validate_pin(args[ARG_output_enable_pin].u_obj);
+    int bit_depth = args[ARG_bit_depth].u_int;
+
+    if (bit_depth <= 0 || bit_depth > 6) {
+        mp_raise_ValueError_varg(translate("Bit depth must be from 1 to 6 inclusive, not %d"), bit_depth);
+    }
+
+    validate_pins(MP_QSTR_rgb_pins, rgb_pins, MP_ARRAY_SIZE(self->rgb_pins), args[ARG_rgb_list].u_obj, &rgb_count);
+    validate_pins(MP_QSTR_addr_pins, addr_pins, MP_ARRAY_SIZE(self->addr_pins), args[ARG_addr_list].u_obj, &addr_count);
+
+    if (rgb_count % 6) {
+        mp_raise_ValueError_varg(translate("Must use a multiple of 6 rgb pins, not %d"), rgb_count);
+    }
+
+    int tile = args[ARG_tile].u_int;
+
+    if (tile <= 0) {
+        mp_raise_ValueError_varg(
+            translate("tile must be greater than zero"));
+    }
+
+    int computed_height = (rgb_count / 3) * (1 << (addr_count)) * tile;
+    if (args[ARG_height].u_int != 0) {
+        if (computed_height != args[ARG_height].u_int) {
+            mp_raise_ValueError_varg(
+                translate("%d address pins, %d rgb pins and %d tiles indicate a height of %d, not %d"), addr_count, rgb_count, tile, computed_height, args[ARG_height].u_int);
+        }
+    }
+
+    if (args[ARG_width].u_int <= 0) {
+        mp_raise_ValueError(translate("width must be greater than zero"));
+    }
+
+    preflight_pins_or_throw(clock_pin, rgb_pins, rgb_count, true);
+
+    mp_obj_t framebuffer = args[ARG_framebuffer].u_obj;
+    if (framebuffer == mp_const_none) {
+        int width = args[ARG_width].u_int;
+        int bufsize = 2 * width * computed_height;
+        framebuffer = mp_obj_new_bytearray_of_zeros(bufsize);
+    }
+
+    common_hal_rgbmatrix_rgbmatrix_construct(self,
+        args[ARG_width].u_int,
+        bit_depth,
+        rgb_count, rgb_pins,
+        addr_count, addr_pins,
+        clock_pin, latch_pin, output_enable_pin,
+        args[ARG_doublebuffer].u_bool,
+        framebuffer, tile, args[ARG_serpentine].u_bool, NULL);
+
+    claim_and_never_reset_pins(args[ARG_rgb_list].u_obj);
+    claim_and_never_reset_pins(args[ARG_addr_list].u_obj);
+    claim_and_never_reset_pin(args[ARG_clock_pin].u_obj);
+    claim_and_never_reset_pin(args[ARG_output_enable_pin].u_obj);
+    claim_and_never_reset_pin(args[ARG_latch_pin].u_obj);
+
+    return MP_OBJ_FROM_PTR(self);
+}
+
+//|     def deinit(self) -> None:
+//|         """Free the resources (pins, timers, etc.) associated with this
+//|         rgbmatrix instance.  After deinitialization, no further operations
+//|         may be performed."""
+//|         ...
+//|
+STATIC mp_obj_t rgbmatrix_rgbmatrix_deinit(mp_obj_t self_in) {
+    rgbmatrix_rgbmatrix_obj_t *self = (rgbmatrix_rgbmatrix_obj_t *)self_in;
+    common_hal_rgbmatrix_rgbmatrix_deinit(self);
+    return mp_const_none;
+}
+
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(rgbmatrix_rgbmatrix_deinit_obj, rgbmatrix_rgbmatrix_deinit);
+
+static void check_for_deinit(rgbmatrix_rgbmatrix_obj_t *self) {
+    if (!self->protomatter.rgbPins) {
+        raise_deinited_error();
+    }
+}
+
+//|     brightness: float
+//|     """In the current implementation, 0.0 turns the display off entirely
+//|     and any other value up to 1.0 turns the display on fully."""
+//|
+STATIC mp_obj_t rgbmatrix_rgbmatrix_get_brightness(mp_obj_t self_in) {
+    rgbmatrix_rgbmatrix_obj_t *self = (rgbmatrix_rgbmatrix_obj_t *)self_in;
+    check_for_deinit(self);
+    return mp_obj_new_float(common_hal_rgbmatrix_rgbmatrix_get_paused(self)? 0.0f : 1.0f);
+}
+MP_DEFINE_CONST_FUN_OBJ_1(rgbmatrix_rgbmatrix_get_brightness_obj, rgbmatrix_rgbmatrix_get_brightness);
+
+STATIC mp_obj_t rgbmatrix_rgbmatrix_set_brightness(mp_obj_t self_in, mp_obj_t value_in) {
+    rgbmatrix_rgbmatrix_obj_t *self = (rgbmatrix_rgbmatrix_obj_t *)self_in;
+    check_for_deinit(self);
+    mp_float_t brightness = mp_obj_get_float(value_in);
+    if (brightness < 0.0f || brightness > 1.0f) {
+        mp_raise_ValueError(translate("Brightness must be 0-1.0"));
+    }
+    common_hal_rgbmatrix_rgbmatrix_set_paused(self, brightness <= 0);
+
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_2(rgbmatrix_rgbmatrix_set_brightness_obj, rgbmatrix_rgbmatrix_set_brightness);
+
+MP_PROPERTY_GETSET(rgbmatrix_rgbmatrix_brightness_obj,
+    (mp_obj_t)&rgbmatrix_rgbmatrix_get_brightness_obj,
+    (mp_obj_t)&rgbmatrix_rgbmatrix_set_brightness_obj);
+
+//|     def refresh(self) -> None:
+//|         """Transmits the color data in the buffer to the pixels so that
+//|         they are shown."""
+//|         ...
+//|
+STATIC mp_obj_t rgbmatrix_rgbmatrix_refresh(mp_obj_t self_in) {
+    rgbmatrix_rgbmatrix_obj_t *self = (rgbmatrix_rgbmatrix_obj_t *)self_in;
+    check_for_deinit(self);
+    common_hal_rgbmatrix_rgbmatrix_refresh(self);
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_1(rgbmatrix_rgbmatrix_refresh_obj, rgbmatrix_rgbmatrix_refresh);
+
+//|     width: int
+//|     """The width of the display, in pixels"""
+//|
+STATIC mp_obj_t rgbmatrix_rgbmatrix_get_width(mp_obj_t self_in) {
+    rgbmatrix_rgbmatrix_obj_t *self = (rgbmatrix_rgbmatrix_obj_t *)self_in;
+    check_for_deinit(self);
+    return MP_OBJ_NEW_SMALL_INT(common_hal_rgbmatrix_rgbmatrix_get_width(self));
+}
+MP_DEFINE_CONST_FUN_OBJ_1(rgbmatrix_rgbmatrix_get_width_obj, rgbmatrix_rgbmatrix_get_width);
+MP_PROPERTY_GETTER(rgbmatrix_rgbmatrix_width_obj,
+    (mp_obj_t)&rgbmatrix_rgbmatrix_get_width_obj);
+
+//|     height: int
+//|     """The height of the display, in pixels"""
+//|
+STATIC mp_obj_t rgbmatrix_rgbmatrix_get_height(mp_obj_t self_in) {
+    rgbmatrix_rgbmatrix_obj_t *self = (rgbmatrix_rgbmatrix_obj_t *)self_in;
+    check_for_deinit(self);
+    return MP_OBJ_NEW_SMALL_INT(common_hal_rgbmatrix_rgbmatrix_get_height(self));
+}
+MP_DEFINE_CONST_FUN_OBJ_1(rgbmatrix_rgbmatrix_get_height_obj, rgbmatrix_rgbmatrix_get_height);
+
+MP_PROPERTY_GETTER(rgbmatrix_rgbmatrix_height_obj,
+    (mp_obj_t)&rgbmatrix_rgbmatrix_get_height_obj);
+
+STATIC const mp_rom_map_elem_t rgbmatrix_rgbmatrix_locals_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&rgbmatrix_rgbmatrix_deinit_obj) },
+    { MP_ROM_QSTR(MP_QSTR_brightness), MP_ROM_PTR(&rgbmatrix_rgbmatrix_brightness_obj) },
+    { MP_ROM_QSTR(MP_QSTR_refresh), MP_ROM_PTR(&rgbmatrix_rgbmatrix_refresh_obj) },
+    { MP_ROM_QSTR(MP_QSTR_width), MP_ROM_PTR(&rgbmatrix_rgbmatrix_width_obj) },
+    { MP_ROM_QSTR(MP_QSTR_height), MP_ROM_PTR(&rgbmatrix_rgbmatrix_height_obj) },
+};
+STATIC MP_DEFINE_CONST_DICT(rgbmatrix_rgbmatrix_locals_dict, rgbmatrix_rgbmatrix_locals_dict_table);
+
+STATIC void rgbmatrix_rgbmatrix_get_bufinfo(mp_obj_t self_in, mp_buffer_info_t *bufinfo) {
+    rgbmatrix_rgbmatrix_obj_t *self = (rgbmatrix_rgbmatrix_obj_t *)self_in;
+    check_for_deinit(self);
+
+    *bufinfo = self->bufinfo;
+}
+
+// These version exists so that the prototype matches the protocol,
+// avoiding a type cast that can hide errors
+STATIC void rgbmatrix_rgbmatrix_swapbuffers(mp_obj_t self_in, uint8_t *dirty_row_bitmap) {
+    (void)dirty_row_bitmap;
+    common_hal_rgbmatrix_rgbmatrix_refresh(self_in);
+}
+
+STATIC void rgbmatrix_rgbmatrix_deinit_proto(mp_obj_t self_in) {
+    common_hal_rgbmatrix_rgbmatrix_deinit(self_in);
+}
+
+STATIC float rgbmatrix_rgbmatrix_get_brightness_proto(mp_obj_t self_in) {
+    return common_hal_rgbmatrix_rgbmatrix_get_paused(self_in) ? 0.0f : 1.0f;
+}
+
+STATIC bool rgbmatrix_rgbmatrix_set_brightness_proto(mp_obj_t self_in, mp_float_t value) {
+    common_hal_rgbmatrix_rgbmatrix_set_paused(self_in, value <= 0);
+    return true;
+}
+
+STATIC int rgbmatrix_rgbmatrix_get_width_proto(mp_obj_t self_in) {
+    return common_hal_rgbmatrix_rgbmatrix_get_width(self_in);
+}
+
+STATIC int rgbmatrix_rgbmatrix_get_height_proto(mp_obj_t self_in) {
+    return common_hal_rgbmatrix_rgbmatrix_get_height(self_in);
+}
+
+STATIC int rgbmatrix_rgbmatrix_get_color_depth_proto(mp_obj_t self_in) {
+    return 16;
+}
+
+STATIC int rgbmatrix_rgbmatrix_get_bytes_per_cell_proto(mp_obj_t self_in) {
+    return 1;
+}
+
+STATIC int rgbmatrix_rgbmatrix_get_native_frames_per_second_proto(mp_obj_t self_in) {
+    return 250;
+}
+
+
+STATIC const framebuffer_p_t rgbmatrix_rgbmatrix_proto = {
+    MP_PROTO_IMPLEMENT(MP_QSTR_protocol_framebuffer)
+    .get_bufinfo = rgbmatrix_rgbmatrix_get_bufinfo,
+    .set_brightness = rgbmatrix_rgbmatrix_set_brightness_proto,
+    .get_brightness = rgbmatrix_rgbmatrix_get_brightness_proto,
+    .get_width = rgbmatrix_rgbmatrix_get_width_proto,
+    .get_height = rgbmatrix_rgbmatrix_get_height_proto,
+    .get_color_depth = rgbmatrix_rgbmatrix_get_color_depth_proto,
+    .get_bytes_per_cell = rgbmatrix_rgbmatrix_get_bytes_per_cell_proto,
+    .get_native_frames_per_second = rgbmatrix_rgbmatrix_get_native_frames_per_second_proto,
+    .swapbuffers = rgbmatrix_rgbmatrix_swapbuffers,
+    .deinit = rgbmatrix_rgbmatrix_deinit_proto,
+};
+
+STATIC mp_int_t rgbmatrix_rgbmatrix_get_buffer(mp_obj_t self_in, mp_buffer_info_t *bufinfo, mp_uint_t flags) {
+    rgbmatrix_rgbmatrix_obj_t *self = (rgbmatrix_rgbmatrix_obj_t *)self_in;
+    // a readonly framebuffer would be unusual but not impossible
+    if ((flags & MP_BUFFER_WRITE) && !(self->bufinfo.typecode & MP_OBJ_ARRAY_TYPECODE_FLAG_RW)) {
+        return 1;
+    }
+    *bufinfo = self->bufinfo;
+    bufinfo->typecode = 'H';
+    return 0;
+}
+
+const mp_obj_type_t rgbmatrix_RGBMatrix_type = {
+    { &mp_type_type },
+    .flags = MP_TYPE_FLAG_EXTENDED,
+    .name = MP_QSTR_RGBMatrix,
+    .locals_dict = (mp_obj_dict_t *)&rgbmatrix_rgbmatrix_locals_dict,
+    .make_new = rgbmatrix_rgbmatrix_make_new,
+    MP_TYPE_EXTENDED_FIELDS(
+        .buffer_p = { .get_buffer = rgbmatrix_rgbmatrix_get_buffer, },
+        .protocol = &rgbmatrix_rgbmatrix_proto,
+        ),
+};
diff --git a/circuitpython/shared-bindings/rgbmatrix/RGBMatrix.h b/circuitpython/shared-bindings/rgbmatrix/RGBMatrix.h
new file mode 100644
index 0000000..127f920
--- /dev/null
+++ b/circuitpython/shared-bindings/rgbmatrix/RGBMatrix.h
@@ -0,0 +1,42 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Jeff Epler 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.
+ */
+
+#pragma once
+
+#include "shared-module/rgbmatrix/RGBMatrix.h"
+#include "lib/protomatter/src/core.h"
+
+extern const mp_obj_type_t rgbmatrix_RGBMatrix_type;
+
+void common_hal_rgbmatrix_rgbmatrix_construct(rgbmatrix_rgbmatrix_obj_t *self, int width, int bit_depth, uint8_t rgb_count, uint8_t *rgb_pins, uint8_t addr_count, uint8_t *addr_pins, uint8_t clock_pin, uint8_t latch_pin, uint8_t oe_pin, bool doublebuffer, mp_obj_t framebuffer, int8_t tile, bool serpentine, void *timer);
+void common_hal_rgbmatrix_rgbmatrix_deinit(rgbmatrix_rgbmatrix_obj_t *);
+void rgbmatrix_rgbmatrix_collect_ptrs(rgbmatrix_rgbmatrix_obj_t *);
+void common_hal_rgbmatrix_rgbmatrix_reconstruct(rgbmatrix_rgbmatrix_obj_t *self, mp_obj_t framebuffer);
+void common_hal_rgbmatrix_rgbmatrix_set_paused(rgbmatrix_rgbmatrix_obj_t *self, bool paused);
+bool common_hal_rgbmatrix_rgbmatrix_get_paused(rgbmatrix_rgbmatrix_obj_t *self);
+void common_hal_rgbmatrix_rgbmatrix_refresh(rgbmatrix_rgbmatrix_obj_t *self);
+int common_hal_rgbmatrix_rgbmatrix_get_width(rgbmatrix_rgbmatrix_obj_t *self);
+int common_hal_rgbmatrix_rgbmatrix_get_height(rgbmatrix_rgbmatrix_obj_t *self);
diff --git a/circuitpython/shared-bindings/rgbmatrix/__init__.c b/circuitpython/shared-bindings/rgbmatrix/__init__.c
new file mode 100644
index 0000000..a7da708
--- /dev/null
+++ b/circuitpython/shared-bindings/rgbmatrix/__init__.c
@@ -0,0 +1,49 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Jeff Epler 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 <stdint.h>
+
+#include "py/obj.h"
+#include "py/runtime.h"
+
+#include "shared-bindings/rgbmatrix/RGBMatrix.h"
+
+//| """Low-level routines for bitbanged LED matrices"""
+//|
+
+STATIC const mp_rom_map_elem_t rgbmatrix_module_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_rgbmatrix) },
+    { MP_ROM_QSTR(MP_QSTR_RGBMatrix), MP_ROM_PTR(&rgbmatrix_RGBMatrix_type) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(rgbmatrix_module_globals, rgbmatrix_module_globals_table);
+
+const mp_obj_module_t rgbmatrix_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t *)&rgbmatrix_module_globals,
+};
+
+MP_REGISTER_MODULE(MP_QSTR_rgbmatrix, rgbmatrix_module, CIRCUITPY_RGBMATRIX);