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Reduced bootloader to less than 1024 bytes (512 words); high fuse byte now 0xca instead of 0xc8; bootloader segment now starts at (byte 0x1C00 instead of 0x1800; word 0xE00 instead of 0xC00)

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This commit is contained in:
David A. Mellis
2005-09-28 15:20:06 +00:00
parent 11aca24b1f
commit 420dcfe697
5 changed files with 229 additions and 248 deletions
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57
bootloader/Makefile
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@ -4,19 +4,12 @@
# program name should not be changed...
PROGRAM = ATmegaBOOT
# enter the product name for which you want to build the bootloader/monitor
# currently CRUMB8, CRUMB128 and PROBOMEGA128 are supported
PRODUCT = CRUMB8
PRODUCT=atmega8
# enter the parameters for the UISP isp tool
#ISPPARAMS = -dprog=stk200 -dlpt=0x378
ISPPARAMS = -dprog=stk500 -dserial=/dev/com1 -dspeed=115200
ISPPARAMS = -dprog=stk500 -dserial=$(SERIAL) -dspeed=115200
############################################################
# You should not have to change anything below here.
############################################################
#DIRAVR = /usr/local/avr
DIRAVRBIN = $(DIRAVR)/bin
DIRAVRUTILS = $(DIRAVR)/utils/bin
@ -24,45 +17,21 @@ DIRINC = .
DIRLIB = $(DIRAVR)/avr/lib
ifeq ($(PRODUCT),CRUMB8)
MCU_TARGET = atmega8
LDSECTION = --section-start=.text=0x1800
LDSECTION = --section-start=.text=0x1c00
FUSE_L = 0xdf
FUSE_H = 0xc8
FUSE_H = 0xca
ISPFUSES = $(DIRAVRBIN)/uisp -dpart=ATmega8 $(ISPPARAMS) --wr_fuse_l=$(FUSE_L) --wr_fuse_h=$(FUSE_H)
ISPFLASH = $(DIRAVRBIN)/uisp -dpart=ATmega8 $(ISPPARAMS) --erase --upload if=$(PROGRAM).hex -v
endif
ifeq ($(PRODUCT),CRUMB128)
MCU_TARGET = atmega128
LDSECTION = --section-start=.text=0x1E000
FUSE_L = 0xdf
FUSE_H = 0xc8
FUSE_E = 0xff
ISPFUSES = ./uisp -dpart=ATmega128 $(ISPPARAMS) --wr_fuse_l=$(FUSE_L) --wr_fuse_h=$(FUSE_H) --wr_fuse_e=$(FUSE_E)
ISPFLASH = ./uisp -dpart=ATmega128 $(ISPPARAMS) --erase --upload if=$(PROGRAM).hex -v
endif
ifeq ($(PRODUCT),PROBOMEGA128)
MCU_TARGET = atmega128
LDSECTION = --section-start=.text=0x1E000
FUSE_L = 0xdf
FUSE_H = 0xc8
FUSE_E = 0xff
ISPFUSES = ./uisp -dpart=ATmega128 $(ISPPARAMS) --wr_fuse_l=$(FUSE_L) --wr_fuse_h=$(FUSE_H) --wr_fuse_e=$(FUSE_E)
ISPFLASH = ./uisp -dpart=ATmega128 $(ISPPARAMS) --erase --upload if=$(PROGRAM).hex -v
endif
OBJ = $(PROGRAM).o
OPTIMIZE = -O3
OPTIMIZE = -Os
DEFS =
DEFS = -DF_CPU=16000000 -DBAUD_RATE=9600
LIBS =
CC = $(DIRAVRBIN)/avr-gcc
CC = $(DIRAVRBIN)/avr-gcc
# Override is only needed by avr-lib build system.
@ -72,8 +41,9 @@ override LDFLAGS = -Wl,-Map,$(PROGRAM).map,$(LDSECTION)
OBJCOPY = $(DIRAVRBIN)/avr-objcopy
OBJDUMP = $(DIRAVRBIN)/avr-objdump
SIZE = $(DIRAVRBIN)/avr-size
all: $(PROGRAM).elf lst text
all: $(PROGRAM).elf lst text asm size
isp: $(PROGRAM).hex
$(ISPFUSES)
@ -83,14 +53,23 @@ $(PROGRAM).elf: $(OBJ)
$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ $(LIBS)
clean:
rm -rf *.s
rm -rf *.o *.elf
rm -rf *.lst *.map
asm: $(PROGRAM).s
%.s: %.c
$(CC) -S $(CFLAGS) -g1 $^
lst: $(PROGRAM).lst
%.lst: %.elf
$(OBJDUMP) -h -S $< > $@
size: $(PROGRAM).hex
$(SIZE) $^
# Rules for building the .text rom images
text: hex bin srec