drivers/neopixel: Add common machine.bitstream-based neopixel module.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

drivers/neopixel/manifest.py

+freeze(
+    ".",
+    "neopixel.py",
+    opt=3,
+)

ports/esp32/boards/manifest.py

@@ -5,3 +5,4 @@ freeze("$(MPY_DIR)/drivers/dht", "dht.py")
 freeze("$(MPY_DIR)/drivers/onewire")
 include("$(MPY_DIR)/extmod/uasyncio/manifest.py")
 include("$(MPY_DIR)/extmod/webrepl/manifest.py")
+include("$(MPY_DIR)/drivers/neopixel/manifest.py")

ports/esp8266/boards/GENERIC_512K/manifest.py

 freeze("$(BOARD_DIR)", "_boot.py", opt=3)
-freeze("$(PORT_DIR)/modules", ("apa102.py", "neopixel.py", "ntptime.py", "port_diag.py"))
+freeze("$(PORT_DIR)/modules", ("apa102.py", "ntptime.py", "port_diag.py"))
 freeze("$(MPY_DIR)/drivers/dht", "dht.py")
 freeze("$(MPY_DIR)/drivers/onewire")
 include("$(MPY_DIR)/extmod/webrepl/manifest.py")
+include("$(MPY_DIR)/drivers/neopixel/manifest.py")

ports/esp8266/boards/manifest.py

@@ -3,3 +3,4 @@ freeze("$(MPY_DIR)/tools", ("upip.py", "upip_utarfile.py"))
 freeze("$(MPY_DIR)/drivers/dht", "dht.py")
 freeze("$(MPY_DIR)/drivers/onewire")
 include("$(MPY_DIR)/extmod/webrepl/manifest.py")
+include("$(MPY_DIR)/drivers/neopixel/manifest.py")

ports/esp8266/modules/neopixel.py

-# NeoPixel driver for MicroPython
-# MIT license; Copyright (c) 2016 Damien P. George, 2021 Jim Mussared
-
-from micropython import const
-from machine import bitstream
-
-_BITSTREAM_TYPE_HIGH_LOW = const(0)
-_TIMING_WS2818_800 = (400, 850, 800, 450)
-_TIMING_WS2818_400 = (800, 1700, 1600, 900)
-
-
-class NeoPixel:
-    ORDER = (1, 0, 2, 3)
-
-    def __init__(self, pin, n, bpp=3, timing=1):
-        self.pin = pin
-        self.n = n
-        self.bpp = bpp
-        self.buf = bytearray(n * bpp)
-        self.pin.init(pin.OUT)
-        self.timing = (
-            (_TIMING_WS2818_800 if timing else _TIMING_WS2818_400)
-            if isinstance(timing, int)
-            else timing
-        )
-
-    def __len__(self):
-        return self.n
-
-    def __setitem__(self, index, val):
-        offset = index * self.bpp
-        for i in range(self.bpp):
-            self.buf[offset + self.ORDER[i]] = val[i]
-
-    def __getitem__(self, index):
-        offset = index * self.bpp
-        return tuple(self.buf[offset + self.ORDER[i]] for i in range(self.bpp))
-
-    def fill(self, color):
-        for i in range(self.n):
-            self[i] = color
-
-    def write(self):
-        bitstream(self.pin, _BITSTREAM_TYPE_HIGH_LOW, self.timing, self.buf)