From 3ead2db8d979bab8fd8848d24de430979698b16f Mon Sep 17 00:00:00 2001
From: Jonas Gunz <himself@jonasgunz.de>
Date: Fri, 4 Jun 2021 00:55:03 +0200
Subject: init

---
 .gitignore |  7 +++++++
 Makefile   | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/main.c | 26 ++++++++++++++++++++++++++
 3 files changed, 86 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100644 src/main.c

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..bac74fd
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,7 @@
+*.o
+obj/
+build/
+tags
+
+compile_flags.txt
+.cache/
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..38f5292
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,53 @@
+MCU             = atmega8
+CPUFREQ         = 160000000
+PROGRAMMER      = dragon_isp
+
+CC              = avr-gcc
+CFLAGS          = -std=c89 -Wall -mmcu=$(MCU) -DF_CPU=$(CPUFREQ)
+LDFLAGS         = -mmcu=$(MCU)
+BUILDDIR        = build
+SOURCEDIR       = src
+OBJECTDIR       = obj
+
+OUTPUT          = analog
+
+SRCS = $(wildcard $(SOURCEDIR)/*.c)
+OBJS = $(SRCS:.c=.o)
+OBJ  = $(OBJS:$(SOURCEDIR)/%=$(OBJECTDIR)/%)
+
+build: dir $(OBJ)
+	@echo LD $(OBJ)
+	@$(CC) $(CFLAGS) -o $(BUILDDIR)/$(OUTPUT) $(OBJ) $(LDFLAGS)
+	@avr-objcopy -O ihex $(BUILDDIR)/$(OUTPUT) $(BUILDDIR)/$(OUTPUT).hex
+
+debug: -D _DEBUG
+debug: build;
+
+dir:
+	@mkdir -p $(OBJECTDIR)
+	@mkdir -p $(BUILDDIR)
+
+$(OBJECTDIR)/%.o: $(SOURCEDIR)/%.c
+	@echo CC $<
+	@$(CC) -c $(CFLAGS) $< -o $@
+
+.PHONY: clean
+clean:	
+	@echo RM $(OBJ)
+	@echo RM $(BUILDDIR)/$(OUTPUT)
+	@rm -df  $(OBJ)
+	@rm -Rdf $(BUILDDIR) $(OBJECTDIR)
+
+all: clean build
+
+flash: build
+	@avrdude -p $(MCU) -c $(PROGRAMMER) -U flash:w:$(BUILDDIR)/$(OUTPUT).hex:i
+
+devsetup:
+	@echo "--target=avr -isystem /usr/avr/include/ $(CFLAGS)" | tr ' ' '\n' > compile_flags.txt
+
+
+#--target=avr
+#tmarch=atmega8
+#-mmcu=atmega8
+#-I/usr/avr/include/
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..c0f35d7
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,26 @@
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <stdint.h>
+
+ISR(TIMER0_OVF_vect) {
+	cli();
+
+	sei();
+}
+
+int main(void) {
+	cli();
+
+	/* Enable TIMER0 with interrupt */
+	TCCR0 |= (1<<CS00);
+	TIMSK |= (1<<TOIE0);
+	
+	/* Go! */
+	sei();
+
+	while(1){
+
+	}
+
+	return 0;
+}
-- 
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