uart in c --- ich hänge

bräuchte mal hilfe! 8-[
bin neu in das thema eingestiegen: habe einen simplen code für kommunikation geschrieben, es kommuniziert aber nix.

musste auf c umsteigen, da bascom nur 4kB in der demoversion verarbeitet.
kann mal jemand über meinen code drüberschauen, hab das makefile auch angeheftet:

Code:

---


#include <avr/io.h>
#include <avr/interrupt.h>



#define BAUD        19200UL
#define UBRR_BAUD  ((F_CPU/(16UL*BAUD))-1)

void uart_init(void)
{
    // Baudrate einstellen (Normaler Modus)
    UBRRH = (unsigned char) (UBRR_BAUD>>8);
    UBRRL = (unsigned char) (UBRR_BAUD & 0x0ff);

    // Aktivieren des Empfängers, des Senders und des "Daten empfangen"-Interrupts
    UCSRB = (1<<RXCIE)|(1<<RXEN)|(1<<TXEN);

    // Einstellen des Datenformats: 8 Datenbits, 1 Stoppbit
    UCSRC = (1<<URSEL)|(1<<UCSZ1)|(1<<UCSZ0);
}


int main(void)
{
    // USART initialisieren
    uart_init();

       
        // LED anmachen zum darstellen der bereitschaft
        DDRB  = 0b00000001;              //  geändert
        PORTB |= (1<<1);                    //  geändert
        PORTA |= (1<<1);    //falsch


       
        //interrupts aktivieren
    sei();
       
       
        //hauptschleife (debug)
        while(1);
        {       
        for (int i=0; i<100; i++)
                {
            // ... warten bis der Sendepuffer leer ist ...
                while ( !( UCSRA & (1<<UDRE)) );       
                       
                UDR = i;
                }
       
        }

    //// Nichts tun. Die Interrupts erledigten den Rest
    //while (1);
}

// Interrupt wird ausgelöst sobald neue Daten im USART-Empfangspuffer liegen
SIGNAL(SIG_UART_RECV)
{
    unsigned char buffer;

    // Daten aus dem Puffer lesen ...
    buffer = UDR;

    // ... warten bis der Sendepuffer leer ist ...
    while ( !( UCSRA & (1<<UDRE)) )
        ;
    // ... und gleich wieder zurück schicken
    UDR = buffer;
}

---

Code:

---


# Hey Emacs, this is a -*- makefile -*-
#----------------------------------------------------------------------------
# WinAVR Makefile Template written by Eric B. Weddington, Jörg Wunsch, et al.
#
# Released to the Public Domain
#
# Additional material for this makefile was written by:
# Peter Fleury
# Tim Henigan
# Colin O'Flynn
# Reiner Patommel
# Markus Pfaff
# Sander Pool
# Frederik Rouleau
# Carlos Lamas
#
#----------------------------------------------------------------------------
# On command line:
#
# make all = Make software.
#
# make clean = Clean out built project files.
#
# make coff = Convert ELF to AVR COFF.
#
# make extcoff = Convert ELF to AVR Extended COFF.
#
# make program = Download the hex file to the device, using avrdude.
#                Please customize the avrdude settings below first!
#
# make debug = Start either simulavr or avarice as specified for debugging,
#              with avr-gdb or avr-insight as the front end for debugging.
#
# make filename.s = Just compile filename.c into the assembler code only.
#
# make filename.i = Create a preprocessed source file for use in submitting
#                  bug reports to the GCC project.
#
# To rebuild project do "make clean" then "make all".
#----------------------------------------------------------------------------


# MCU name
MCU = atmega8


# Processor frequency.
#    This will define a symbol, F_CPU, in all source code files equal to the
#    processor frequency. You can then use this symbol in your source code to
#    calculate timings. Do NOT tack on a 'UL' at the end, this will be done
#    automatically to create a 32-bit value in your source code.
#    Typical values are:
#        F_CPU =  1000000
#        F_CPU =  1843200
#        F_CPU =  2000000
#        F_CPU =  3686400
#        F_CPU =  4000000
#        F_CPU =  7372800
#        F_CPU =  8000000
#        F_CPU = 11059200
#        F_CPU = 14745600
#        F_CPU = 16000000
#        F_CPU = 18432000
#        F_CPU = 20000000
F_CPU = 10000000


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


# Target file name (without extension).
TARGET = uart


# Object files directory
#    To put object files in current directory, use a dot (.), do NOT make
#    this an empty or blank macro!
OBJDIR = .


# List C source files here. (C dependencies are automatically generated.)
SRC = $(TARGET).c


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


# List Assembler source files here.
#    Make them always end in a capital .S.  Files ending in a lowercase .s
#    will not be considered source files but generated files (assembler
#    output from the compiler), and will be deleted upon "make clean"!
#    Even though the DOS/Win* filesystem matches both .s and .S the same,
#    it will preserve the spelling of the filenames, and gcc itself does
#    care about how the name is spelled on its command-line.
ASRC =


# Optimization level, can be [0, 1, 2, 3, s].
#    0 = turn off optimization. s = optimize for size.
#    (Note: 3 is not always the best optimization level. See avr-libc FAQ.)
OPT = s


# Debugging format.
#    Native formats for AVR-GCC's -g are dwarf-2 [default] or stabs.
#    AVR Studio 4.10 requires dwarf-2.
#    AVR [Extended] COFF format requires stabs, plus an avr-objcopy run.
DEBUG = dwarf-2


# List any extra directories to look for include files here.
#    Each directory must be seperated by a space.
#    Use forward slashes for directory separators.
#    For a directory that has spaces, enclose it in quotes.
EXTRAINCDIRS =


# Compiler flag to set the C Standard level.
#    c89  = "ANSI" C
#    gnu89 = c89 plus GCC extensions
#    c99  = ISO C99 standard (not yet fully implemented)
#    gnu99 = c99 plus GCC extensions
CSTANDARD = -std=gnu99


# Place -D or -U options here for C sources
CDEFS = -DF_CPU=$(F_CPU)UL


# Place -D or -U options here for ASM sources
ADEFS = -DF_CPU=$(F_CPU)


# Place -D or -U options here for C++ sources
CPPDEFS = -DF_CPU=$(F_CPU)UL
#CPPDEFS += -D__STDC_LIMIT_MACROS
#CPPDEFS += -D__STDC_CONSTANT_MACROS



#---------------- Compiler Options C ----------------
#  -g*:          generate debugging information
#  -O*:          optimization level
#  -f...:        tuning, see GCC manual and avr-libc documentation
#  -Wall...:    warning level
#  -Wa,...:      tell GCC to pass this to the assembler.
#    -adhlns...: create assembler listing
CFLAGS = -g$(DEBUG)
CFLAGS += $(CDEFS)
CFLAGS += -O$(OPT)
CFLAGS += -funsigned-char
CFLAGS += -funsigned-bitfields
CFLAGS += -fpack-struct
CFLAGS += -fshort-enums
CFLAGS += -Wall
CFLAGS += -Wstrict-prototypes
#CFLAGS += -mshort-calls
#CFLAGS += -fno-unit-at-a-time
#CFLAGS += -Wundef
#CFLAGS += -Wunreachable-code
#CFLAGS += -Wsign-compare
CFLAGS += -Wa,-adhlns=$(<:%.c=$(OBJDIR)/%.lst)
CFLAGS += $(patsubst %,-I%,$(EXTRAINCDIRS))
CFLAGS += $(CSTANDARD)


#---------------- Compiler Options C++ ----------------
#  -g*:          generate debugging information
#  -O*:          optimization level
#  -f...:        tuning, see GCC manual and avr-libc documentation
#  -Wall...:    warning level
#  -Wa,...:      tell GCC to pass this to the assembler.
#    -adhlns...: create assembler listing
CPPFLAGS = -g$(DEBUG)
CPPFLAGS += $(CPPDEFS)
CPPFLAGS += -O$(OPT)
CPPFLAGS += -funsigned-char
CPPFLAGS += -funsigned-bitfields
CPPFLAGS += -fpack-struct
CPPFLAGS += -fshort-enums
CPPFLAGS += -fno-exceptions
CPPFLAGS += -Wall
CPPFLAGS += -Wundef
#CPPFLAGS += -mshort-calls
#CPPFLAGS += -fno-unit-at-a-time
#CPPFLAGS += -Wstrict-prototypes
#CPPFLAGS += -Wunreachable-code
#CPPFLAGS += -Wsign-compare
CPPFLAGS += -Wa,-adhlns=$(<:%.cpp=$(OBJDIR)/%.lst)
CPPFLAGS += $(patsubst %,-I%,$(EXTRAINCDIRS))
#CPPFLAGS += $(CSTANDARD)


#---------------- Assembler Options ----------------
#  -Wa,...:  tell GCC to pass this to the assembler.
#  -adhlns:  create listing
#  -gstabs:  have the assembler create line number information; note that
#            for use in COFF files, additional information about filenames
#            and function names needs to be present in the assembler source
#            files -- see avr-libc docs [FIXME: not yet described there]
#  -listing-cont-lines: Sets the maximum number of continuation lines of hex
#      dump that will be displayed for a given single line of source input.
ASFLAGS = $(ADEFS) -Wa,-adhlns=$(<:%.S=$(OBJDIR)/%.lst),-gstabs,--listing-cont-lines=100


#---------------- Library Options ----------------
# Minimalistic printf version
PRINTF_LIB_MIN = -Wl,-u,vfprintf -lprintf_min

# Floating point printf version (requires MATH_LIB = -lm below)
PRINTF_LIB_FLOAT = -Wl,-u,vfprintf -lprintf_flt

# If this is left blank, then it will use the Standard printf version.
PRINTF_LIB =
#PRINTF_LIB = $(PRINTF_LIB_MIN)
#PRINTF_LIB = $(PRINTF_LIB_FLOAT)


# Minimalistic scanf version
SCANF_LIB_MIN = -Wl,-u,vfscanf -lscanf_min

# Floating point + %[ scanf version (requires MATH_LIB = -lm below)
SCANF_LIB_FLOAT = -Wl,-u,vfscanf -lscanf_flt

# If this is left blank, then it will use the Standard scanf version.
SCANF_LIB =
#SCANF_LIB = $(SCANF_LIB_MIN)
#SCANF_LIB = $(SCANF_LIB_FLOAT)


MATH_LIB = -lm


# List any extra directories to look for libraries here.
#    Each directory must be seperated by a space.
#    Use forward slashes for directory separators.
#    For a directory that has spaces, enclose it in quotes.
EXTRALIBDIRS =



#---------------- External Memory Options ----------------

# 64 KB of external RAM, starting after internal RAM (ATmega128!),
# used for variables (.data/.bss) and heap (malloc()).
#EXTMEMOPTS = -Wl,-Tdata=0x801100,--defsym=__heap_end=0x80ffff

# 64 KB of external RAM, starting after internal RAM (ATmega128!),
# only used for heap (malloc()).
#EXTMEMOPTS = -Wl,--section-start,.data=0x801100,--defsym=__heap_end=0x80ffff

EXTMEMOPTS =



#---------------- Linker Options ----------------
#  -Wl,...:    tell GCC to pass this to linker.
#    -Map:      create map file
#    --cref:    add cross reference to  map file
LDFLAGS = -Wl,-Map=$(TARGET).map,--cref
LDFLAGS += $(EXTMEMOPTS)
LDFLAGS += $(patsubst %,-L%,$(EXTRALIBDIRS))
LDFLAGS += $(PRINTF_LIB) $(SCANF_LIB) $(MATH_LIB)
#LDFLAGS += -T linker_script.x



#---------------- Programming Options (avrdude) ----------------

# Programming hardware
# Type: avrdude -c ?
# to get a full listing.
#
AVRDUDE_PROGRAMMER = stk200

# com1 = serial port. Use lpt1 to connect to parallel port.
AVRDUDE_PORT = lpt1

AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex
#AVRDUDE_WRITE_EEPROM = -U eeprom:w:$(TARGET).eep


# Uncomment the following if you want avrdude's erase cycle counter.
# Note that this counter needs to be initialized first using -Yn,
# see avrdude manual.
#AVRDUDE_ERASE_COUNTER = -y

# Uncomment the following if you do /not/ wish a verification to be
# performed after programming the device.
#AVRDUDE_NO_VERIFY = -V

# Increase verbosity level.  Please use this when submitting bug
# reports about avrdude. See <http://savannah.nongnu.org/projects/avrdude>
# to submit bug reports.
#AVRDUDE_VERBOSE = -v -v

AVRDUDE_FLAGS = -p $(MCU) -P $(AVRDUDE_PORT) -c $(AVRDUDE_PROGRAMMER)
AVRDUDE_FLAGS += $(AVRDUDE_NO_VERIFY)
AVRDUDE_FLAGS += $(AVRDUDE_VERBOSE)
AVRDUDE_FLAGS += $(AVRDUDE_ERASE_COUNTER)



#---------------- Debugging Options ----------------

# For simulavr only - target MCU frequency.
DEBUG_MFREQ = $(F_CPU)

# Set the DEBUG_UI to either gdb or insight.
# DEBUG_UI = gdb
DEBUG_UI = insight

# Set the debugging back-end to either avarice, simulavr.
DEBUG_BACKEND = avarice
#DEBUG_BACKEND = simulavr

# GDB Init Filename.
GDBINIT_FILE = __avr_gdbinit

# When using avarice settings for the JTAG
JTAG_DEV = /dev/com1

# Debugging port used to communicate between GDB / avarice / simulavr.
DEBUG_PORT = 4242

# Debugging host used to communicate between GDB / avarice / simulavr, normally
#    just set to localhost unless doing some sort of crazy debugging when
#    avarice is running on a different computer.
DEBUG_HOST = localhost



#============================================================================


# Define programs and commands.
SHELL = sh
CC = avr-gcc
OBJCOPY = avr-objcopy
OBJDUMP = avr-objdump
SIZE = avr-size
AR = avr-ar rcs
NM = avr-nm
AVRDUDE = avrdude
REMOVE = rm -f
REMOVEDIR = rm -rf
COPY = cp
WINSHELL = cmd


# 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 C:
MSG_COMPILING_CPP = Compiling C++:
MSG_ASSEMBLING = Assembling:
MSG_CLEANING = Cleaning project:
MSG_CREATING_LIBRARY = Creating library:




# Define all object files.
OBJ = $(SRC:%.c=$(OBJDIR)/%.o) $(CPPSRC:%.cpp=$(OBJDIR)/%.o) $(ASRC:%.S=$(OBJDIR)/%.o)

# Define all listing files.
LST = $(SRC:%.c=$(OBJDIR)/%.lst) $(CPPSRC:%.cpp=$(OBJDIR)/%.lst) $(ASRC:%.S=$(OBJDIR)/%.lst)


# Compiler flags to generate dependency files.
GENDEPFLAGS = -MMD -MP -MF .dep/$(@F).d


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





# Default target.
all: begin gccversion sizebefore build sizeafter end

# Change the build target to build a HEX file or a library.
build: elf hex eep lss sym
#build: lib


elf: $(TARGET).elf
hex: $(TARGET).hex
eep: $(TARGET).eep
lss: $(TARGET).lss
sym: $(TARGET).sym
LIBNAME=lib$(TARGET).a
lib: $(LIBNAME)



# 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)

end:
        @echo $(MSG_END)
        @echo


# Display size of file.
HEXSIZE = $(SIZE) --target=$(FORMAT) $(TARGET).hex
ELFSIZE = $(SIZE) --mcu=$(MCU) --format=avr $(TARGET).elf

sizebefore:
        @if test -f $(TARGET).elf; then echo; echo $(MSG_SIZE_BEFORE); $(ELFSIZE); \
        2>/dev/null; echo; fi

sizeafter:
        @if test -f $(TARGET).elf; then echo; echo $(MSG_SIZE_AFTER); $(ELFSIZE); \
        2>/dev/null; echo; fi



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



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


# Generate avr-gdb config/init file which does the following:
#    define the reset signal, load the target file, connect to target, and set
#    a breakpoint at main().
gdb-config:
        @$(REMOVE) $(GDBINIT_FILE)
        @echo define reset >> $(GDBINIT_FILE)
        @echo SIGNAL SIGHUP >> $(GDBINIT_FILE)
        @echo end >> $(GDBINIT_FILE)
        @echo file $(TARGET).elf >> $(GDBINIT_FILE)
        @echo target remote $(DEBUG_HOST):$(DEBUG_PORT)  >> $(GDBINIT_FILE)
ifeq ($(DEBUG_BACKEND),simulavr)
        @echo load  >> $(GDBINIT_FILE)
endif
        @echo break main >> $(GDBINIT_FILE)

debug: gdb-config $(TARGET).elf
ifeq ($(DEBUG_BACKEND), avarice)
        @echo Starting AVaRICE - Press enter when "waiting to connect" message displays.
        @$(WINSHELL) /c start avarice --jtag $(JTAG_DEV) --erase --program --file \
        $(TARGET).elf $(DEBUG_HOST):$(DEBUG_PORT)
        @$(WINSHELL) /c pause

else
        @$(WINSHELL) /c start simulavr --gdbserver --device $(MCU) --clock-freq \
        $(DEBUG_MFREQ) --port $(DEBUG_PORT)
endif
        @$(WINSHELL) /c start avr-$(DEBUG_UI) --command=$(GDBINIT_FILE)




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



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

%.eep: %.elf
        @echo
        @echo $(MSG_EEPROM) $@
        -$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
        --change-section-lma .eeprom=0 --no-change-warnings -O $(FORMAT) $< $@ || exit 0

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

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



# Create library from object files.
.SECONDARY : $(TARGET).a
.PRECIOUS : $(OBJ)
%.a: $(OBJ)
        @echo
        @echo $(MSG_CREATING_LIBRARY) $@
        $(AR) $@ $(OBJ)


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


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


# Compile: create object files from C++ source files.
$(OBJDIR)/%.o : %.cpp
        @echo
        @echo $(MSG_COMPILING_CPP) $<
        $(CC) -c $(ALL_CPPFLAGS) $< -o $@


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


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


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


# Create preprocessed source for use in sending a bug report.
%.i : %.c
        $(CC) -E -mmcu=$(MCU) -I. $(CFLAGS) $< -o $@


# Target: clean project.
clean: begin clean_list end

clean_list :
        @echo
        @echo $(MSG_CLEANING)
        $(REMOVE) $(TARGET).hex
        $(REMOVE) $(TARGET).eep
        $(REMOVE) $(TARGET).cof
        $(REMOVE) $(TARGET).elf
        $(REMOVE) $(TARGET).map
        $(REMOVE) $(TARGET).sym
        $(REMOVE) $(TARGET).lss
        $(REMOVE) $(SRC:%.c=$(OBJDIR)/%.o)
        $(REMOVE) $(SRC:%.c=$(OBJDIR)/%.lst)
        $(REMOVE) $(SRC:.c=.s)
        $(REMOVE) $(SRC:.c=.d)
        $(REMOVE) $(SRC:.c=.i)
        $(REMOVEDIR) .dep


# Create object files directory
$(shell mkdir $(OBJDIR) 2>/dev/null)


# Include the dependency files.
-include $(shell mkdir .dep 2>/dev/null) $(wildcard .dep/*)


# 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

---

Der Mega8 hat kein PortA.
Wenn du eine Led an ein Port machen willst, dann zuerst DDRx setzen.
Wenn du das AVR-Studio verwendest brauchst du kein Makefile.
Sonst sehe ich auf die Schnelle keinen Fehler.
Sonst Hardware sicher OK?

DANKE

das mit dem PORTA hab ich auch schon gesehen, war aber nicht so wichtig.

Der Fehler war, dass ich in der Taktfrequenz 'ne 0 zu viel hatte,
der Teil mit dem Empfangen und wieder zurückschicken funktioniert jetzt auch.

Es bleibt lediglich das Problem, dass er mir aus der inneren Schleife keine Daten sendet.

Hast du vielleicht nen Ansatz für mich??

da hat sich ein semikolon hinter dein while geschmuggelt! weis nciht obn absichtlich doer nciht, jedenfalls schleift er sich im das while dusselig uind ignoriert die nachfolgenden geschweiften klammern ...

ich glaube dein hyperterminal wird dich erschlagen wenn du es so zubombadierst! versuchs doch mal andersherum

schreib deine daten in deiner ISR in einen puffer und in der hauptschleife zählst du nur die bytes im puffer mit und was das eltzte zeichen war, wenn da ein \r oder ein \n steht, liest du ein, was davor steht und gibst es aus (\n ist das standard terminalzeichen in C, \r glaube ich aber im terminal, deswegen solltest du auf beides prüfen) ... vergiss dann nur nicht den puffer zurückzusetzen ^^

SUUUPPPERRR!!!!


DANKE; DANKE; DANKE;

das hab ich schon garnimmer gesehen!!!

GENAU DAS WARS!!!

DANKE =D>

Zur Untersützung des Themas hier:
http://www.tschallener.net/AVR/intr_usart.pdf

in der pdf ist unten noch ein Link, dann kannste Dir ein eigenes Headerfile zusammenstellen mit den Funktionen/Prototypen die Du brauchst.

Mir hat es sehr geholfen!