Re: [avr-gcc-list] avrxmega7 device-not-found

[Senthil Kumar]

On 19-Nov-2015 9:10 pm, "Ajay Garg" <address@hidden> wrote:
>
> Hi All.
>
> I am trying to build a hello-world program using a linux-gcc-toolchain.
>
>
> Following is the program ::
>
> #####################################################
> /* ledblink.c, an LED blinking program */
>
> #include<avr/io.h>
> #include<util/delay.h>
> void sleep(uint8_t millisec)
> {
>         while(millisec)
>
>         {
>                 _delay_ms(1);/* 1 ms delay */
>                 millisec--;
>         }
> }
> main()
> {
>
>         DDRC |=1<<PC2;  /* PC2 will now be the output pin */
>         while(1)
>         {
>                 PORTC &= ~(1<<PC2);/* PC2 LOW */
>                 sleep(100);/* 100 ms delay */
>
>                 PORTC |=(1<<PC2); /* PC2 HIGH */
>                 sleep(100);/* 100 ms delay */
>         }
> }
> #####################################################
>
>
>
>
> When I compile with -mmcu=atmega8, the device is found, and the program builds fine.
>
>
>
> However with avrxmega7, it fails at the very beginning, with the error "device not found" ::
>
>

avrxmega7 is not a real device - it represents a prototypical device for a variant of the xmega ISA.

The device header and peripheral macros are only available for a real device, which is why you're getting these errors.
#####################################################
> address@hidden:~$ avr-gcc -mmcu=avrxmega7 ledblink.c -o ledblink.o
> In file included from ledblink.c:2:0:
> /usr/lib/avr/include/avr/io.h:428:6: warning: #warning "device type not defined" [-Wcpp]
>  #    warning "device type not defined"
>       ^
> In file included from ledblink.c:3:0:
> /usr/lib/avr/include/util/delay.h:90:3: warning: #warning "F_CPU not defined for <util/delay.h>" [-Wcpp]
>  # warning "F_CPU not defined for <util/delay.h>"
>    ^
> /usr/lib/avr/include/util/delay.h:95:3: warning: #warning "Compiler optimizations disabled; functions from <util/delay.h> won't work as designed" [-Wcpp]
>  # warning "Compiler optimizations disabled; functions from <util/delay.h> won't work as designed"
>    ^
> ledblink.c: In function ‘main’:
> ledblink.c:16:9: error: ‘DDRC’ undeclared (first use in this function)
>          DDRC |=1<<PC2;  /* PC2 will now be the output pin */
>          ^
> ledblink.c:16:9: note: each undeclared identifier is reported only once for each function it appears in
> ledblink.c:16:19: error: ‘PC2’ undeclared (first use in this function)
>          DDRC |=1<<PC2;  /* PC2 will now be the output pin */
>                    ^
> ledblink.c:19:17: error: ‘PORTC’ undeclared (first use in this function)
>                  PORTC &= ~(1<<PC2);/* PC2 LOW */
> #####################################################
>
>
>
>
> Following are the various package-versions ::
>
> #####################################################
> address@hidden:~$ dpkg -l | grep avr
> ii  avr-libc                                              1:1.8.0-4.1                                         all          Standard C library for Atmel AVR development
> ii  avrdude                                               6.0.1-1                                             i386         software for programming Atmel AVR microcontrollers
> ii  binutils-avr                                          2.23.1-2.1                                          i386         Binary utilities supporting Atmel's AVR targets
> ii  gcc-avr                                               1:4.8-2.1                                           i386         The GNU C compiler (cross compiler for avr)
> ii  gdb-avr                                               7.6-1                                               i386         The GNU Debugger for avr
> ii  libavresample2:i386                                   6:11-1trusty                                        i386         Libav audio resampling library
> #####################################################
>
>
> What am I missing?
>
>
> --
> Regards,
> Ajay
>
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