atmel-samd: Add modules directory with frozen bytecode support (like ESP8266 port), and NeoPixel python wrapper module.

atmel-samd/Makefile

@@ -27,6 +27,15 @@ BOSSAC := tools/bossac_osx
 
 HAL_DIR=hal/$(MCU_SERIES)
 
+# Frozen bytecode configuration.  Any .py files placed in the modules subdirectory
+# will be frozen into .mpy files and embedded in the firmware (like the ESP8266
+# port).
+MPY_CROSS = ../mpy-cross/mpy-cross
+MPY_TOOL = ../tools/mpy-tool.py
+FROZEN_MPY_DIR = modules
+FROZEN_MPY_PY_FILES := $(shell find -L $(FROZEN_MPY_DIR) -type f -name '*.py')
+FROZEN_MPY_MPY_FILES := $(addprefix $(BUILD)/,$(FROZEN_MPY_PY_FILES:.py=.mpy))
+
 INC += -I.
 INC += -I..
 INC += -I../lib/mp-readline
@@ -187,7 +196,7 @@ SRC_BINDINGS_EXPANDED = $(addprefix shared-bindings/, $(SRC_BINDINGS)) \
                         $(addprefix common-hal/, $(SRC_BINDINGS))
 
 SRC_AUTOGEN = \
- $(BUILD)/_frozen_mpy.c \
+ $(BUILD)/frozen_mpy.c \
 
 OBJ = $(PY_O) $(addprefix $(BUILD)/, $(SRC_C:.c=.o))
 OBJ += $(addprefix $(BUILD)/, $(SRC_ASF:.c=.o))
@@ -199,9 +208,16 @@ SRC_QSTR += $(SRC_C) $(SRC_BINDINGS_EXPANDED) $(STM_SRC_C)
 
 all: $(BUILD)/firmware.bin
 
-$(BUILD)/_frozen_mpy.c: frozentest.mpy $(BUILD)/genhdr/qstrdefs.generated.h
-	$(ECHO) "MISC freezing bytecode"
-	$(Q)../tools/mpy-tool.py -f -q $(BUILD)/genhdr/qstrdefs.preprocessed.h -mlongint-impl=none $< > $@
+# to build .mpy files from .py files
+$(BUILD)/$(FROZEN_MPY_DIR)/%.mpy: $(FROZEN_MPY_DIR)/%.py
+	@$(ECHO) "MPY $<"
+	$(Q)$(MKDIR) -p $(dir $@)
+	$(Q)$(MPY_CROSS) -o $@ -s $(^:$(FROZEN_MPY_DIR)/%=%) $^
+
+# to build frozen_mpy.c from all .mpy files
+$(BUILD)/frozen_mpy.c: $(FROZEN_MPY_MPY_FILES) $(BUILD)/genhdr/qstrdefs.generated.h
+	@$(ECHO) "Creating $@"
+	$(Q)$(PYTHON) $(MPY_TOOL) -f -q $(BUILD)/genhdr/qstrdefs.preprocessed.h -mlongint-impl=none $(FROZEN_MPY_MPY_FILES) > $@
 
 $(BUILD)/firmware.elf: $(OBJ)
 	$(ECHO) "LINK $@"

atmel-samd/modules/neopixel.py

@@ -0,0 +1,31 @@
+# NeoPixel driver for MicroPython on ESP8266
+# MIT license; Copyright (c) 2016 Damien P. George
+
+from neopixel_write import neopixel_write
+
+class NeoPixel:
+    def __init__(self, pin, n):
+        self.pin = pin
+        self.n = n
+        self.buf = bytearray(n * 3)
+        self.pin.init(pin.OUT)
+
+    def __setitem__(self, index, val):
+        r, g, b = val
+        self.buf[index * 3] = g
+        self.buf[index * 3 + 1] = r
+        self.buf[index * 3 + 2] = b
+
+    def __getitem__(self, index):
+        i = index * 3
+        return self.buf[i + 1], self.buf[i], self.buf[i + 2]
+
+    def fill(self, color):
+        r, g, b = color
+        for i in range(len(self.buf) / 3):
+            self.buf[i * 3] = g
+            self.buf[i * 3 + 1] = r
+            self.buf[i * 3 + 2] = b
+
+    def write(self):
+        neopixel_write(self.pin, self.buf, True)