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122 lines
4.2 KiB
Makefile
122 lines
4.2 KiB
Makefile
#
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# Copyright 2012 Google Inc.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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# MA 02110-1301, USA.
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#
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DEVICE = attiny2313
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F_CPU = 12000000 # in Hz
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AVRDUDE = avrdude -c usbasp -p $(DEVICE) # edit this line for your programmer
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USBDRV_DIR = ../third_party/usbdrv
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CFLAGS = -I$(USBDRV_DIR) -I. -DDEBUG_LEVEL=0
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OBJECTS = $(USBDRV_DIR)/usbdrv.o $(USBDRV_DIR)/usbdrvasm.o $(USBDRV_DIR)/oddebug.o usb_keyboard.o
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COMPILE = avr-gcc -Wall -Os -DF_CPU=$(F_CPU) $(CFLAGS) -mmcu=$(DEVICE)
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FUSE_L = 0xef
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FUSE_H = 0xdb
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# ATTiny2313 FUSE_L (Fuse low byte):
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# 0xef = 1 1 1 0 1 1 1 1
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# ^ ^ \+/ \--+--/
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# | | | +------- CKSEL 3..0 (clock selection -> crystal @ 12 MHz)
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# | | +--------------- SUT 1..0 (BOD enabled, fast rising power)
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# | +------------------ CKOUT (clock output on CKOUT pin -> disabled)
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# +-------------------- CKDIV8 (divide clock by 8 -> don't divide)
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# ATTiny2313 FUSE_H (Fuse high byte):
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# 0xdb = 1 1 0 1 1 0 1 1
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# ^ ^ ^ ^ \-+-/ ^
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# | | | | | +---- RSTDISBL (disable external reset -> enabled)
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# | | | | +-------- BODLEVEL 2..0 (brownout trigger level -> 2.7V)
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# | | | +-------------- WDTON (watchdog timer always on -> disable)
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# | | +---------------- SPIEN (enable serial programming -> enabled)
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# | +------------------ EESAVE (preserve EEPROM on Chip Erase -> not preserved)
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# +-------------------- DWEN (debug wire enable)
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# symbolic targets:
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help:
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@echo "This Makefile has no default rule. Use one of the following:"
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@echo "make hex ........... to build dit-dah.hex and space.hex"
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@echo "make program ....... to flash fuses and dit-dah firmware"
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@echo "make fuse .......... to flash the fuses"
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@echo "make flash_dit-dah . to flash the dit-dah firmware"
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@echo "make flash_space ... to flash the space key firmware"
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@echo "make clean ......... to delete objects and hex file"
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hex: dit-dah.hex space.hex
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program: flash_dit-dah fuse
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# rule for programming fuse bits:
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fuse:
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@[ "$(FUSE_H)" != "" -a "$(FUSE_L)" != "" ] || \
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{ echo "*** Edit Makefile and choose values for FUSE_L and FUSE_H!"; exit 1; }
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$(AVRDUDE) -U hfuse:w:$(FUSE_H):m -U lfuse:w:$(FUSE_L):m
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# rule for uploading firmware:
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flash_dit-dah: dit-dah.hex
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$(AVRDUDE) -U flash:w:dit-dah.hex:i
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flash_space: space.hex
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$(AVRDUDE) -U flash:w:space.hex:i
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# rule for deleting dependent files (those which can be built by Make):
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clean:
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rm -f dit-dah.{hex,lst,obj,cof,list,map,eep.hex,elf,s} space.{hex,lst,obj,cof,list,map,eep.hex,elf,s} *.o $(USBDRV_DIR)/*.o $(USBDRV_DIR)/oddebug.s $(USBDRV_DIR)/usbdrv.s
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# Generic rule for compiling C files:
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.c.o:
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$(COMPILE) -c $< -o $@
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dit-dah.o: dit-dah.c usbconfig.h usb_keyboard.h
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space.o: space.c usbconfig.h usb_keyboard.h
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# Generic rule for assembling Assembler source files:
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.S.o:
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$(COMPILE) -x assembler-with-cpp -c $< -o $@
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# "-x assembler-with-cpp" should not be necessary since this is the default
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# file type for the .S (with capital S) extension. However, upper case
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# characters are not always preserved on Windows. To ensure WinAVR
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# compatibility define the file type manually.
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# Generic rule for compiling C to assembler, used for debugging only.
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.c.s:
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$(COMPILE) -S $< -o $@
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# file targets:
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dit-dah.elf: $(OBJECTS) dit-dah.o
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$(COMPILE) -o dit-dah.elf $(OBJECTS) dit-dah.o
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space.elf: $(OBJECTS) space.o
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$(COMPILE) -o space.elf $(OBJECTS) space.o
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dit-dah.hex: dit-dah.elf
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rm -f dit-dah.hex dit-dah.eep.hex
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avr-objcopy -j .text -j .data -O ihex dit-dah.elf dit-dah.hex
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avr-size dit-dah.hex
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space.hex: space.elf
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rm -f space.hex space.eep.hex
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avr-objcopy -j .text -j .data -O ihex space.elf space.hex
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avr-size space.hex
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