chore: wifi struct, systick

Makefile

@@ -23,6 +23,7 @@ ASFLAGS = -mcpu=$(MCU) -mthumb -g
 LDFLAGS = -T linker.ld -Map=$(BUILD_DIR)/$(PROJECT).map \
     --gc-sections --no-warn-rwx-segments \
     --defsym=_RAM_START_ADDR=$(RAM_START)
+LIBFLAGS = 
 
 SRC_DIR = src
 BUILD_DIR = build
@@ -60,7 +61,7 @@ $(BUILD_DIR)/%.o: $(SRC_DIR)/%.s
 
 $(ELF): $(OBJS) $(ASM_OBJS)
 	@echo "LD $@"
-	@$(LD) $(LDFLAGS) -o $@ $^
+	@$(LD) $(LDFLAGS) -o $@ $^ $(LIBFLAGS)
 
 $(BIN): $(ELF)
 	@echo "OBJCOPY $@"