Update build process to use mpy-cross

pico/Makefile

@@ -1,6 +1,27 @@
+SRC_DIR := src
+BUILD_DIR := build
+
+SRC_FILES := $(wildcard $(SRC_DIR)/*.py) $(wildcard $(SRC_DIR)/**/*.py)
+BUILD_FILES := $(patsubst $(SRC_DIR)/%.py,$(BUILD_DIR)/%.mpy, $(SRC_FILES))
+	
+$(BUILD_DIR)/%.mpy: $(SRC_DIR)/%.py
+	@mkdir -p `dirname $@`
+	mpy-cross $< -o $@
+
+.PHONY: build
+build: $(BUILD_FILES)
+
+.PHONY: clean
+clean:
+	rm -rf $(BUILD_DIR)
+
 .PHONY: deploy
-deploy:
-	mpremote fs cp src/* :
+deploy: $(BUILD_FILES)
+	mpremote fs cp -r $(BUILD_DIR)/* :
+	
+.PHONY: purge
+purge:
+	mpremote run purge.py
 
 .PHONY: run
 run: deploy