Hi there .. i try getting the Arduino-UART to work with AvrStudio .. (for days now) .. and i doesnt work 
i am using the UART-Library (supporting atmega328p)
this one ... http://homepage.hispeed.ch/peterfleury/avr-software.html
thats the code:
/*************************************************************************
Title: example program for the Interrupt controlled UART library
Author: Peter Fleury <pfleury@gmx.ch> http://jump.to/fleury
File: $Id: test_uart.c,v 1.4 2005/07/10 11:46:30 Peter Exp $
Software: AVR-GCC 3.3
Hardware: any AVR with built-in UART, tested on AT90S8515 at 4 Mhz
DESCRIPTION:
This example shows how to use the UART library uart.c
*************************************************************************/
#include <stdlib.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/pgmspace.h>
#include "uart.h"
/* define CPU frequency in Mhz here if not defined in Makefile */
#ifndef F_CPU
#define F_CPU 16000000UL
#endif
/* 9600 baud */
#define UART_BAUD_RATE 9600
int main(void)
{
unsigned int c;
char buffer[7];
int num=134;
uart_init( UART_BAUD_SELECT(UART_BAUD_RATE,F_CPU) );
sei();
uart_puts("TEST\n");
for(;;)
{
c = uart_getc();
if ( c & UART_NO_DATA )
{
/*
* no data available from UART
*/
}
else
{
/*
* new data available from UART
* check for Frame or Overrun error
*/
if ( c & UART_FRAME_ERROR )
{
/* Framing Error detected, i.e no stop bit detected */
uart_puts_P("UART Frame Error: ");
}
if ( c & UART_OVERRUN_ERROR )
{
/*
* Overrun, a character already present in the UART UDR register was
* not read by the interrupt handler before the next character arrived,
* one or more received characters have been dropped
*/
uart_puts_P("UART Overrun Error: ");
}
if ( c & UART_BUFFER_OVERFLOW )
{
/*
* We are not reading the receive buffer fast enough,
* one or more received character have been dropped
*/
uart_puts_P("Buffer overflow error: ");
}
/*
* send received character back
*/
uart_putc( (unsigned char)c );
}
}
}
Build-Result:
Build started 28.1.2012 at 12:33:47
avr-gcc -mmcu=atmega328p -Wall -gdwarf-2 -std=gnu99 -DF_CPU=16000000UL -Os -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums -MD -MP -MT uartdemo.o -MF dep/uartdemo.o.d -c ../uartdemo.c
../uartdemo.c: In function 'main':
../uartdemo.c:33:10: warning: unused variable 'num'
../uartdemo.c:32:10: warning: unused variable 'buffer'
avr-gcc -mmcu=atmega328p -Wl,-Map=uartdemo.map uartdemo.o uart.o -o uartdemo.elf
avr-objcopy -O ihex -R .eeprom -R .fuse -R .lock -R .signature uartdemo.elf uartdemo.hex
avr-objcopy -j .eeprom --set-section-flags=.eeprom="alloc,load" --change-section-lma .eeprom=0 --no-change-warnings -O ihex uartdemo.elf uartdemo.eep || exit 0
avr-objdump -h -S uartdemo.elf > uartdemo.lss
AVR Memory Usage
----------------
Device: atmega328p
Program: 700 bytes (2.1% Full)
(.text + .data + .bootloader)
Data: 75 bytes (3.7% Full)
(.data + .bss + .noinit)
Build succeeded with 2 Warnings...
AVR-Duding:
C:\avrprj\uart_test\default>\upl uartdemo
Uploading uartdemo.hex ...
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.03s
avrdude: Device signature = 0x1e950f
avrdude: NOTE: FLASH memory has been specified, an erase cycle will be performed
To disable this feature, specify the -D option.
avrdude: erasing chip
avrdude: reading input file "uartdemo.hex"
avrdude: input file uartdemo.hex auto detected as Intel Hex
avrdude: writing flash (700 bytes):
Writing | ################################################## | 100% 1.56s
avrdude: 700 bytes of flash written
avrdude: verifying flash memory against uartdemo.hex:
avrdude: load data flash data from input file uartdemo.hex:
avrdude: input file uartdemo.hex auto detected as Intel Hex
avrdude: input file uartdemo.hex contains 700 bytes
avrdude: reading on-chip flash data:
Reading | ################################################## | 100% 1.17s
avrdude: verifying ...
avrdude: 700 bytes of flash verified
avrdude: safemode: Fuses OK
avrdude done. Thank you.
C:\avrprj\uart_test\default>
well everything looks fine ... but the uart doesnt work :-
CPU is set to 16Mhz .. i tested it on Arduino-UNO and Arduino-Duemilanove
Can someone gimme a tip?
Thx Cyb.
