add micro-controller source code with simple Makefile

src/Makefile

@@ -0,0 +1,79 @@
+# required packages
+# sudo aptitude install avrdude gcc-avr avr-libc
+# the program
+PROG=led-controller
+# to compile
+CC=avr-gcc
+OBJDUMP=avr-objdump
+OBJCOPY=avr-objcopy
+CFLAGS=-g -Wall -O3 -std=c99
+# the target
+DEVICE=atmega328p
+F_CPU=18432000UL
+# the port to flash
+#PORT=/dev/ttyUSB0
+# the flasher
+#PROGRAMMER=buspirate
+PROGRAMMER=usbtiny
+# to flash
+#AVRDUDE=avrdude -p $(DEVICE) -P $(PORT) -c $(PROGRAMMER)
+FLASHER=avrdude -p $(DEVICE) -c $(PROGRAMMER)
+
+all: prog
+
+prog: verify $(PROG).c
+	$(CC) $(CFLAGS) -I. -mmcu=$(DEVICE) -DF_CPU=$(F_CPU) -o $(PROG) $(PROG).c
+	$(OBJDUMP) -h -S $(PROG) > $(PROG).lst
+	$(OBJCOPY) -j .text -j .data -O ihex $(PROG) $(PROG).hex
+
+# Fuse low byte:
+# 0xff = 1 1 1 1   1 1 1 1
+#        ^ ^ \+/   \--+--/
+#        | |  |       +------- CKSEL 3..0 (clock selection -> full swing crytal oscillator)
+#        | |  +--------------- SUT 1..0 (select start-up time -> slowly rising power)
+#        | +------------------ CKOUT (clock output on CKOUT pin -> unprogrammed)
+#        +-------------------- CKDIV8 (divide clock by 8 -> unprogrammed)
+#
+# Fuse high byte:
+# 0xdf = 1 1 0 1   1 1 1 1
+#        ^ ^ ^ ^   ^ \+/ ^
+#        | | | |   |  |  +---- BOOTRST (Select Reset Vector -> jump to application at start)
+#        | | | |   |  +------- BOOTSZ 1..0 (Select Boot Size -> 256 words starting at 0x3F00)
+#        | | | |   +---------- EESAVE (preserve EEPROM on Chip Erase -> unprogrammed)
+#        | | | +-------------- WDTON (watchdog timer always on -> unprogrammed)
+#        | | +---------------- SPIEN (enable serial programming -> programmed)
+#        | +------------------ DWEN (debug wire enable -> unprogrammed)
+#        +-------------------- RSTDISBL (disable external reset -> unprogrammed)
+#
+# Fuse extended byte:
+# 0x04 = - - - -   - 1 0 0
+#                    \-+-/
+#                      +------ BODLEVEL 2..0 (Brown-out Detector trigger level -> 4.3V)
+burn-fuse:
+	$(FLASHER) -U lfuse:w:0xff:m -U hfuse:w:0xdf:m -U efuse:w:0x04:m
+
+read-fuse:
+	$(FLASHER) -U lfuse:r:lfuse.raw:r -U hfuse:r:hfuse.raw:r -U efuse:r:efuse.raw:r
+
+flash:
+	$(FLASHER) -U flash:w:$(PROG).hex:i
+
+read-flash:
+	$(FLASHER) -U flash:r:flash_dump.hex:i
+
+flash: prog load
+install : prog load
+load:
+	$(FLASHER) -U flash:w:$(PROG).hex:i
+
+clean:
+	rm -f $(PROG) *.hex *.lst
+
+verify:
+	$(FLASHER)
+	if [ $$? -eq 0 ]; then \
+		echo "flasher configured correctly"; \
+	else \
+		echo "flasher not configured correctly in Makefile"; \
+		exit 1; \
+	fi