From f078fe9b54424b6ba12a64d981607c0ead887078 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Tue, 12 Jan 2016 12:29:35 +0100
Subject: add Makefile and main.c stub (with display test code)

---
 .gitignore |  7 +++++++
 Makefile   | 45 +++++++++++++++++++++++++++++++++++++++++++++
 main.c     | 31 +++++++++++++++++++++++++++++++
 3 files changed, 83 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100644 main.c

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..975c237
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,7 @@
+*.o
+*.eep
+*.elf
+*.hex
+*.lss
+*.map
+*.sym
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..aea031d
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,45 @@
+MCU ?= attiny88
+AVRDUDE_PROGRAMMER ?= usbasp
+
+AVRCC ?= avr-gcc
+AVRFLASH ?= avrdude
+AVRNM ?= avr-nm
+AVROBJCOPY ?= avr-objcopy
+AVROBJDUMP ?= avr-objdump
+
+CFLAGS += -mmcu=attiny88 -DF_CPU=1000000UL
+# CFLAGS += -gdwarf-2
+CFLAGS += -I. -std=gnu99 -Os -Wall -Wextra -pedantic
+CFLAGS += -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums
+CFLAGS += -fwhole-program -flto -mstrict-X
+
+#AVRFLAGS += -U lfuse:w:0xe4:m -U hfuse:w:0xdf:m -U efuse:w:0xff:m
+AVRFLAGS += -U flash:w:main.hex
+#AVRFLAGS += -U eeprom:w:main.eep
+
+%.hex: %.elf
+	${AVROBJCOPY} -O ihex -R .eeprom $< $@
+
+%.eep: %.elf
+	${AVROBJCOPY} -j .eeprom --set-section-flags=.eeprom="alloc,load" \
+	--change-section-lma .eeprom=0 -O ihex $< $@
+
+main.elf: main.c
+	${AVRCC} ${CFLAGS} -o $@ ${@:.elf=.c} -Wl,-Map=main.map,--cref
+	avr-size -d $@
+
+program: main.hex #main.eep
+	${AVRFLASH} -p ${MCU} -c ${AVRDUDE_PROGRAMMER} ${AVRFLAGS}
+
+secsize: main.elf
+	${AVROBJDUMP} -hw -j.text -j.bss -j.data main.elf
+
+funsize: main.elf
+	${AVRNM} --print-size --size-sort main.elf
+
+.PHONY: program secsize funsize
+
+# Listing of phony targets.
+.PHONY : all begin finish end sizebefore sizeafter gccversion \
+build elf hex eep lss sym coff extcoff \
+clean clean_list program debug gdb-config
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..1911237
--- /dev/null
+++ b/main.c
@@ -0,0 +1,31 @@
+#include <avr/io.h>
+#include <avr/wdt.h>
+#include <util/delay.h>
+#include <stdlib.h>
+
+int main (void)
+{
+	unsigned int i, j, h;
+	wdt_disable();
+
+	DDRB = 0xff;
+	DDRD = 0xff;
+
+	PORTB = 0;
+	PORTD = 0;
+
+	while (1) {
+		for (i = 1; i < 256; i *= 2) {
+			PORTB = i;
+			for (j = 1; j < 256; j *= 2) {
+				PORTD = ~j;
+				for (h = 1; h < 1; h++) { // use "h < 4096" for visible pixels (e.g. finding soldering errors)
+					asm("nop");
+				}
+			}
+			PORTB = 0;
+		}
+	}
+
+	return 0;
+}
-- 
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