Initialize multi-platform support

Makefile

@@ -12,7 +12,25 @@ SRCS := \
   $(wildcard src/*.c) \
   $(wildcard src/*/*.c)
 
-OUTPUTS = $(patsubst %.S,build/%.o,$(patsubst %.c,build/%.o, $(SRCS)))
+
+BUILDDIR = build/$(PLATFORM)
+
+ifeq ($(PLATFORM),badgemagic)
+CFLAGS += -DPLATFORM_BADGEMAGIC
+else ifeq ($(PLATFORM),ls32-usbc)
+CFLAGS += -DPLATFORM_LS32_USBC
+else ifeq ($(PLATFORM),ls32-microusb)
+CFLAGS += -DPLATFORM_LS32_MICROUSB
+else
+_ERROR=Unknown PLATFORM $(PLATFORM)
+ifeq ($(PLATFORM),)
+_ERROR=Select a PLATFORM
+endif
+$(error "$(_ERROR) (valid platforms: badgemagic, ls32-usbc, ls32-microusb)")
+endif
+
+
+OUTPUTS = $(patsubst %.S,$(BUILDDIR)/%.o,$(patsubst %.c,$(BUILDDIR)/%.o, $(SRCS)))
 
 PREFIX ?= riscv-none-embed-
 CC = "$(PREFIX)gcc"
@@ -34,25 +52,29 @@ LDFLAGS = -march=rv32imac -mabi=ilp32 -msmall-data-limit=8 \
 	./CH5xx_ble_firmware_library/BLE/LIBCH58xBLE.a \
 	-T CH5xx_ble_firmware_library/Ld/Link.ld -nostartfiles -Xlinker --gc-sections
 
-all: build/badgewitch.elf build/badgewitch.bin
+all: build/$(PLATFORM).bin
 
-build/%.o: %.c
+$(BUILDDIR)/%.o: %.c
 	@mkdir -p $(dir $@)
-	$(CC) -c $(CFLAGS) $< -o $@
+	@echo "CC $@"
+	@$(CC) -c $(CFLAGS) $< -o $@
 
-build/%.o: %.S
+$(BUILDDIR)/%.o: %.S
 	@mkdir -p $(dir $@)
-	$(CC) -c $(CFLAGS) $< -o $@
+	@echo "AS $@"
+	@$(CC) -c $(CFLAGS) $< -o $@
 
-build/badgewitch.elf: $(OUTPUTS)
+$(BUILDDIR)/badgewitch.elf: $(OUTPUTS)
 	@mkdir -pv $(dir $@)
-	$(CC) $(OUTPUTS) $(LDFLAGS) -o $@
+	@echo "LD $@"
+	@$(CC) $(OUTPUTS) $(LDFLAGS) -o $@
 
-build/%.bin: build/%.elf
-	$(OBJCOPY) -O binary -S $< $@
+build/%.bin: build/%/badgewitch.elf
+	@echo "ELF -> BIN $<"
+	@$(OBJCOPY) -O binary -S $< $@
 
-flash: build/badgewitch.bin
-	wchisp flash build/badgewitch.bin
+flash: build/$(PLATFORM).bin
+	wchisp flash build/$(PLATFORM).bin
 
 clean:
 	rm -rf build