add 3.7 inch Epaper BW, remove some examples

Example/EpaperModuleTest_RaspberryPi/Makefile

@@ -0,0 +1,49 @@
+# Compiler settings
+CC = gcc
+CFLAGS = -Wall -Wextra -g -O2 -ffunction-sections -fdata-sections
+LDFLAGS = -Wl,--gc-sections
+LIBS = -lwiringPi -lm
+
+# Directory settings
+SRC_DIR = .
+EPAPER_LIB_DIR = ./epaper
+BUILD_DIR = ./build
+BIN_DIR = ./bin
+
+# Target settings
+TARGET = $(BIN_DIR)/epd
+EPD_TYPE = NULL  # Can be set to EPD420_BW etc.
+DEBUG_FLAG = -DDEBUG
+
+# Auto detect source files
+SRCS = $(wildcard $(SRC_DIR)/*.c) $(wildcard $(EPAPER_LIB_DIR)/*.c)
+OBJS = $(patsubst %.c,$(BUILD_DIR)/%.o,$(SRCS))
+
+# Create all required directories
+BUILD_SUBDIRS = $(sort $(dir $(OBJS)))
+$(shell mkdir -p $(BUILD_SUBDIRS) $(BIN_DIR))
+
+# Default target
+all: $(TARGET)
+
+# Linking target
+$(TARGET): $(OBJS)
+	@echo "EPD_TYPE: $(EPD_TYPE)"
+	@echo "Linking to generate executable file: $@"
+	$(CC) $(LDFLAGS) $^ -o $@ $(LIBS)
+	@echo "Executable file generated at: $@"
+
+# Compilation rules
+$(BUILD_DIR)/%.o: $(SRC_DIR)/%.c
+	@echo "Compiling source file: $<"
+	$(CC) $(CFLAGS) -D$(EPD_TYPE) $(DEBUG_FLAG) -I$(EPAPER_LIB_DIR) -c $< -o $@
+
+$(BUILD_DIR)/%.o: $(EPAPER_LIB_DIR)/%.c
+	@echo "Compiling source file: $<"
+	$(CC) $(CFLAGS) -D$(EPD_TYPE) $(DEBUG_FLAG) -I$(EPAPER_LIB_DIR) -c $< -o $@
+
+# Cleanup
+clean:
+	rm -rf $(BUILD_DIR) $(BIN_DIR)
+
+.PHONY: all clean