[avr-gcc-list] AVR gcc port

[Leonid]

Hi all!



I use Win AVR package.
I'm write the gcc port for ATMEL AVR Atmega 128 micro controller .
Atmega 128 have 128K Bytes of In-System Reprogrammable Flash
4K Bytes Internal SRAM and up 64K Bytes External SRAM.
We are working with AVR Studio 4.07 for debugging so we use ext coff format.
I use the following Makefile(see Makefile)  with targets:  clean, all and
extcoff.

Problem #1.
In the main.c I define array in program memory as follows(see main.c).

In the map file (see map file ) it's used to be in the text section.
But AVR studio shows this array at the address 0x008c SRAM(?) and value of
all members 0;

After reading from program memory sbyte[] array contains the right value of
stam_msg.

I found out that actually stam_msg is in program memory but at the address
0x46.


Problem #2.
We use the AVR Extended COFF format for AVR Studio 4.x.
But debugger doesn't show structures and can't find enter point (main()).
Any other file it can't find too.



================================================

Main.c
================================================
unsigned char PROGMEM stam_msg[] = "TEST";

void main( void )
{

unsigned char sbyte[4];

int i;
for (i=0;i<5 ;i++ )
{
sbyte[i] = PRG_RDB(stam_msg+i);
}

}
========================================================
MAP file fragment
========================================================
.text 0x00000000 0x18f24
*(.vectors)
.vectors 0x00000000 0x8c
C:\WinAVR\bin\..\lib\gcc-lib\avr\3.3.1\..\..\..\..\avr\lib\avr5\crtm128.o
0x00000000 __vectors
0x00000000 __vector_default
0x0000008c __ctors_start = .
*(.ctors)
0x0000008c __ctors_end = .
0x0000008c __dtors_start = .
*(.dtors)
0x0000008c __dtors_end = .
*(.progmem.gcc*)
*(.progmem*)
.progmem.data 0x0000008c 0x6
C:/Projects/HT_Device/HT_Control_gcc/RemoteMDB/main.o
0x0000008c stam_msg


========================================================

Makefile

# WinAVR Sample makefile written by Eric B. Weddington, J&ouml;rg Wunsch, et
al.
# Released to the Public Domain
# Please read the make user manual!
#
# Additional material for this makefile was submitted by:
# Tim Henigan
# Peter Fleury
# Reiner Patommel
# Sander Pool
# Frederik Rouleau
# Markus Pfaff
#
# On command line:
#
# make all = Make software.
#
# make clean = Clean out built project files.
#
# make coff = Convert ELF to AVR COFF (for use with AVR Studio 3.x or
VMLAB).
#
# make extcoff = Convert ELF to AVR Extended COFF (for use with AVR Studio
# 4.07 or greater).
#
# make program = Download the hex file to the device, using avrdude. Please
# customize the avrdude settings below first!
#
# make filename.s = Just compile filename.c into the assembler code only
#
# To rebuild project do "make clean" then "make all".
#


# MCU name
MCU = atmega128

# Output format. (can be srec, ihex, binary)
FORMAT = ihex

# Target file name (without extension).
TARGET = RemoteMDB
# Optimization level, can be [0, 1, 2, 3, s]. 0 turns off optimization.
OPT = 0

# List C source files here. (C dependencies are automatically generated.)


PROJ_DIR=C:/Projects/HT_Device/HT_Control_gcc


SRC =$(PROJ_DIR)/RemoteMDB/main.c\

# List Assembler source files here.
ASRC =

COMP_DIR=c:/WinAVR/avr
# List any extra directories to look for include files here.
EXTRAINCDIRS = $(PROJ_DIR) $(COMP_DIR) $(COMP_DIR)/include
$(COMP_DIR)/include/avr

# Optional compiler flags.
CFLAGS = -g -O$(OPT) \
-funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums \
-Wall -Wstrict-prototypes \
-Wa,-adhlns=$(<:.c=.lst) \
$(patsubst %,-I%,$(EXTRAINCDIRS))

CFLAGS+= -g3
CFLAGS+= -fno-builtin -Wno-missing-braces

# Set a "language standard" compiler flag.
CFLAGS += -std=gnu99

# Optional assembler flags.
ASFLAGS = -Wa,-adhlns=$(<:.S=.lst),-gstabs

# Optional linker flags.
LDFLAGS = -Wl,-Map=$(TARGET).map,--cref,
LDFLAGS += -e main

# Programming support using avrdude. Settings and variables.

AVRDUDE_PROGRAMMER = stk500
AVRDUDE_PORT = com1 # programmer connected to serial device
AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex


AVRDUDE_FLAGS = -p $(MCU) -P $(AVRDUDE_PORT) -c $(AVRDUDE_PROGRAMMER)

# --------------------------------------------------------------------------
-
# Define directories, if needed.
DIRAVR = c:/winavr
DIRAVRBIN = $(DIRAVR)/bin
DIRAVRUTILS = $(DIRAVR)/utils/bin
DIRINC = .
DIRLIB = $(DIRAVR)/avr/lib

CC = avr-gcc

OBJCOPY = avr-objcopy
OBJDUMP = avr-objdump
SIZE = avr-size


# Programming support using avrdude.
AVRDUDE = avrdude


REMOVE = rm -f
COPY = cp

HEXSIZE = $(SIZE) --target=$(FORMAT) $(TARGET).hex
ELFSIZE = $(SIZE) -A $(TARGET).elf

# Define Messages
# English
MSG_ERRORS_NONE = Errors: none
MSG_BEGIN = -------- begin --------
MSG_END = -------- end --------
MSG_SIZE_BEFORE = Size before:
MSG_SIZE_AFTER = Size after:
MSG_COFF = Converting to AVR COFF:
MSG_EXTENDED_COFF = Converting to AVR Extended COFF:
MSG_FLASH = Creating load file for Flash:
MSG_EEPROM = Creating load file for EEPROM:
MSG_EXTENDED_LISTING = Creating Extended Listing:
MSG_SYMBOL_TABLE = Creating Symbol Table:
MSG_LINKING = Linking:
MSG_COMPILING = Compiling:
MSG_ASSEMBLING = Assembling:
MSG_CLEANING = Cleaning project:

# Define all object files.
OBJ = $(SRC:.c=.o) $(ASRC:.S=.o)

# Define all listing files.
LST = $(ASRC:.S=.lst) $(SRC:.c=.lst)

# Combine all necessary flags and optional flags.
# Add target processor to flags.
ALL_CFLAGS = -mmcu=$(MCU) -I. $(CFLAGS)
ALL_ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp $(ASFLAGS)


# Default target.
all: begin gccversion sizebefore $(TARGET).elf $(TARGET).hex $(TARGET).eep \
$(TARGET).lss $(TARGET).sym sizeafter extcoff finished end


# Eye candy.
# AVR Studio 3.x does not check make's exit code but relies on
# the following magic strings to be generated by the compile job.
begin:
@echo
@echo $(MSG_BEGIN)

finished:
@echo $(MSG_ERRORS_NONE)

end:
@echo $(MSG_END)
@echo


# Display size of file.
sizebefore:
@if [ -f $(TARGET).elf ]; then echo; echo $(MSG_SIZE_BEFORE); $(ELFSIZE);
echo; fi

sizeafter:
@if [ -f $(TARGET).elf ]; then echo; echo $(MSG_SIZE_AFTER); $(ELFSIZE);
echo; fi


# Display compiler version information.
gccversion :
@$(CC) --version


# Convert ELF to COFF for use in debugging / simulating in
# AVR Studio or VMLAB.
COFFCONVERT=$(OBJCOPY) --debugging \
--change-section-address .data-0x800000 \
--change-section-address .bss-0x800000 \
--change-section-address .noinit-0x800000 \
--change-section-address .eeprom-0x810000

coff: $(TARGET).elf
@echo
@echo $(MSG_COFF) $(TARGET).cof
$(COFFCONVERT) -O coff-avr $< $(TARGET).cof

extcoff: $(TARGET).elf
@echo
@echo $(MSG_EXTENDED_COFF) $(TARGET).cof
$(COFFCONVERT) -O coff-ext-avr $< $(TARGET).cof

# Program the device.
program: $(TARGET).hex $(TARGET).eep
$(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH) $(AVRDUDE_WRITE_EEPROM)

# Create final output files (.hex, .eep) from ELF output file.
%.hex: %.elf
@echo
@echo $(MSG_FLASH) $@
$(OBJCOPY) -O $(FORMAT) -R .eeprom $< $@

%.eep: %.elf
@echo
@echo $(MSG_EEPROM) $@
-$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
--change-section-lma .eeprom=0 -O $(FORMAT) $< $@

# Create extended listing file from ELF output file.
%.lss: %.elf
@echo
@echo $(MSG_EXTENDED_LISTING) $@
$(OBJDUMP) -h -S $< > $@

# Create a symbol table from ELF output file.
%.sym: %.elf
@echo
@echo $(MSG_SYMBOL_TABLE) $@
avr-nm -n $< > $@

# Link: create ELF output file from object files.
.SECONDARY : $(TARGET).elf
.PRECIOUS : $(OBJ)
%.elf: $(OBJ)
@echo
@echo $(MSG_LINKING) $@
$(CC) $(ALL_CFLAGS) $(OBJ) --output $@ $(LDFLAGS)


# Compile: create object files from C source files.
%.o : %.c
@echo
@echo $(MSG_COMPILING) $<
$(CC) -c $(ALL_CFLAGS) $< -o $@


# Compile: create assembler files from C source files.
%.s : %.c
$(CC) -S $(ALL_CFLAGS) $< -o $@


# Assemble: create object files from assembler source files.
%.o : %.S
@echo
@echo $(MSG_ASSEMBLING) $<
$(CC) -c $(ALL_ASFLAGS) $< -o $@

# Target: clean project.
clean: begin clean_list finished end

clean_list :
@echo
@echo $(MSG_CLEANING)
$(REMOVE) $(TARGET).hex
$(REMOVE) $(TARGET).eep
$(REMOVE) $(TARGET).obj
$(REMOVE) $(TARGET).cof
$(REMOVE) $(TARGET).elf
$(REMOVE) $(TARGET).map
$(REMOVE) $(TARGET).obj
$(REMOVE) $(TARGET).a90
$(REMOVE) $(TARGET).sym
$(REMOVE) $(TARGET).lnk
$(REMOVE) $(TARGET).lss
$(REMOVE) $(OBJ)
$(REMOVE) $(LST)
$(REMOVE) $(SRC:.c=.s)
$(REMOVE) $(SRC:.c=.d)

# Automatically generate C source code dependencies.
# (Code originally taken from the GNU make user manual and modified
# (See README.txt Credits).)
#
# Note that this will work with sh (bash) and sed that is shipped with
WinAVR
# (see the SHELL variable defined above).
# This may not work with other shells or other seds.
#
%.d: %.c
set -e; $(CC) -MM $(ALL_CFLAGS) $< \
| sed 's,\(.*\)\.o[ :]*,\1.o \1.d : ,g' > $@; \
[ -s $@ ] || rm -f $@

# Remove the '-' if you want to see the dependency files generated.
-include $(SRC:.c=.d)

# Listing of phony targets.
.PHONY : all begin finish end sizebefore sizeafter gccversion coff extcoff \
clean clean_list program
========================================================

Thank's.
Leon