From 2ed0c0a4acad69717d08457f3f3341f796df03d4 Mon Sep 17 00:00:00 2001
From: Imbus <>
Date: Sat, 23 Mar 2024 21:27:48 +0100
Subject: [PATCH] Makefile now puts object files and elf into build
 subdirectory

---
 makefile | 33 ++++++++++++++++++++-------------
 1 file changed, 20 insertions(+), 13 deletions(-)

diff --git a/makefile b/makefile
index 3e28edb..efd39fb 100644
--- a/makefile
+++ b/makefile
@@ -14,27 +14,30 @@ CFLAGS = -std=c2x -Wall -Wno-array-bounds -mmcu=$(MCU) -DF_CPU=16000000UL -O3
 # Source files
 SRCS = $(wildcard *.c)
 
+# Object files directory
+OBJDIR = build
+
 # Object files
-OBJS = $(SRCS:.c=.o)
+OBJS = $(addprefix $(OBJDIR)/,$(SRCS:.c=.o))
 
 # Target file
 TARGET = main
 
 # Default target
-all: $(TARGET).hex
+all: $(OBJDIR) $(TARGET).hex
 
 # Compile C files
-%.o: %.c
+$(OBJDIR)/%.o: %.c | $(OBJDIR)
 	$(CC) $(CFLAGS) -c $< -o $@
 
 # Link object files
-$(TARGET).elf: $(OBJS)
-	$(CC) $(CFLAGS) $(OBJS) -o $(TARGET).elf
-	avr-strip $(TARGET).elf
+$(OBJDIR)/$(TARGET).elf: $(OBJS)
+	$(CC) $(CFLAGS) $(OBJS) -o $(OBJDIR)/$(TARGET).elf
+	avr-strip $(OBJDIR)/$(TARGET).elf
 
 # Convert ELF to HEX
-$(TARGET).hex: $(TARGET).elf
-	avr-objcopy -O ihex -R .eeprom $(TARGET).elf $(TARGET).hex
+$(TARGET).hex: $(OBJDIR)/$(TARGET).elf
+	avr-objcopy -O ihex -R .eeprom $(OBJDIR)/$(TARGET).elf $(TARGET).hex
 
 # Flash the program
 flash: $(TARGET).hex
@@ -42,18 +45,22 @@ flash: $(TARGET).hex
 
 # Run the program in QEMU
 qemu: $(TARGET).elf
-	qemu-system-avr -machine $(QEMU_MACHINE_NAME) -bios $(TARGET).elf
+	qemu-system-avr -machine $(QEMU_MACHINE_NAME) -bios $(OBJDIR)/$(TARGET).elf
 
 # View the generated assembly
 asm: $(TARGET).hex
-	avr-objdump -S $(TARGET).elf
+	avr-objdump -S $(OBJDIR)/$(TARGET).elf
 
 serial:
 	picocom -b 9600 /dev/ttyUSB0
 
+# Create build directory
+$(OBJDIR):
+	mkdir -p $(OBJDIR)
+
 # Clean
 clean:
-	rm -f $(OBJS) $(TARGET).elf $(TARGET).hex
+	rm -rf $(OBJDIR) $(TARGET).hex
 
-size: main.hex
-	avr-size --mcu=atmega328p main.hex
\ No newline at end of file
+size: $(TARGET).hex
+	avr-size --mcu=atmega328p $(TARGET).hex