Hi,
I wonderd if anyone could tell me which "variables/names/whatever they are called" could be used in #IF defined(......)
I already figured out that both AVR_ATmega2560 and AVR_ATmega1280 could be used.
But is there a complete list somewhere??
Hope you understand my question, hard to describe
If I knew how to describe it easily Google would have been more helpful for me 
I bet you could put in any processor you find in avrdude.conf in there.
Hi,
Alban:
But is there a complete list somewhere??
Not really.
Libc defines a few processor specific macros...
http://www.nongnu.org/avr-libc/user-manual/group__avr__io.html
It takes some coaxing but it is possible to get avr-g++ to reveal the list of supported processors...
Known MCU names:
avr2
at90s2313
at90s2323
at90s2333
at90s2343
attiny22
attiny26
at90s4414
at90s4433
at90s4434
at90s8515
at90c8534
at90s8535
avr25
ata6289
attiny13
attiny13a
attiny2313
attiny2313a
attiny24
attiny24a
attiny4313
attiny44
attiny44a
attiny84
attiny25
attiny45
attiny85
attiny261
attiny261a
attiny461
attiny461a
attiny861
attiny861a
attiny43u
attiny87
attiny48
attiny88
at86rf401
avr3
at43usb320
at43usb355
at76c711
avr31
atmega103
avr35
at90usb82
at90usb162
atmega8u2
atmega16u2
atmega32u2
attiny167
avr4
atmega8
atmega48
atmega48a
atmega48p
atmega88
atmega88a
atmega88p
atmega88pa
atmega8515
atmega8535
atmega8hva
atmega4hvd
atmega8hvd
at90pwm1
at90pwm2
at90pwm2b
at90pwm3
at90pwm3b
at90pwm81
avr5
atmega16
atmega16a
atmega161
atmega162
atmega163
atmega164a
atmega164p
atmega165
atmega165a
atmega165p
atmega168
atmega168a
atmega168p
atmega169
atmega169a
atmega169p
atmega169pa
atmega16c1
atmega16hva
atmega16hva2
atmega16hvb
atmega16m1
atmega16u4
atmega32
atmega323
atmega324a
atmega324p
atmega324pa
atmega325
atmega325p
atmega3250
atmega3250p
atmega328
atmega328p
atmega329
atmega329p
atmega329pa
atmega3290
atmega3290p
atmega32c1
atmega32hvb
atmega32m1
atmega32u4
atmega32u6
atmega406
atmega64
atmega640
atmega644
atmega644a
atmega644p
atmega644pa
atmega645
atmega645a
atmega645p
atmega6450
atmega6450a
atmega6450p
atmega649
atmega649a
atmega649p
atmega6490
atmega6490a
atmega6490p
atmega64c1
atmega64m1
atmega64hve
at90can32
at90can64
at90pwm216
at90pwm316
at90scr100
at90usb646
at90usb647
at94k
avr51
atmega128
atmega1280
atmega1281
atmega1284p
atmega128rfa1
at90can128
at90usb1286
at90usb1287
m3000f
m3000s
m3001b
avr6
atmega2560
atmega2561
avrxmega2
atxmega16a4
atxmega16d4
atxmega32d4
avrxmega3
atxmega32a4
avrxmega4
atxmega64a3
atxmega64d3
avrxmega5
atxmega64a1
avrxmega6
atxmega128a3
atxmega128d3
atxmega192a3
atxmega192d3
atxmega256a3
atxmega256a3b
atxmega256d3
avrxmega7
atxmega128a1
avr1
at90s1200
attiny11
attiny12
attiny15
attiny28
So, when compiling for the atmega2560, the compiler automatically defines the macro AVR_ATmega2560.
See section AVR_Device for the "construction rule".
Then, if you need more specific defines, you can use
avr-gcc -mmcu=atmega8 -dM -E - < /dev/null
Where "atmega8" can be any of your favorit target controller. It will give this result:
#define __DBL_MIN_EXP__ (-125)
#define __UINT_LEAST16_MAX__ 65535U
#define __ATOMIC_ACQUIRE 2
#define __FLT_MIN__ 1.17549435e-38F
#define __BUILTIN_AVR_SLEEP 1
#define __UINT_LEAST8_TYPE__ unsigned char
#define __INTMAX_C(c) c ## LL
#define __CHAR_BIT__ 8
#define __UINT8_MAX__ 255
#define __WINT_MAX__ 65535U
#define __ORDER_LITTLE_ENDIAN__ 1234
#define __SIZE_MAX__ 65535U
#define __WCHAR_MAX__ 32767
#define __DBL_DENORM_MIN__ ((double)1.40129846e-45L)
#define __GCC_ATOMIC_CHAR_LOCK_FREE 1
#define __FLT_EVAL_METHOD__ 0
#define __GCC_ATOMIC_CHAR32_T_LOCK_FREE 1
#define __UINT_FAST64_MAX__ 18446744073709551615ULL
#define __SIG_ATOMIC_TYPE__ int
#define __DBL_MIN_10_EXP__ (-37)
#define __FINITE_MATH_ONLY__ 0
#define __FLASH __flash
#define __GNUC_PATCHLEVEL__ 0
#define __UINT_FAST8_MAX__ 65535U
#define __DEC64_MAX_EXP__ 385
#define __INT8_C(c) c
#define __UINT_LEAST64_MAX__ 18446744073709551615ULL
#define __SHRT_MAX__ 32767
#define __LDBL_MAX__ 3.40282347e+38L
#define __UINT_LEAST8_MAX__ 255
#define __GCC_ATOMIC_BOOL_LOCK_FREE 1
#define __UINTMAX_TYPE__ long long unsigned int
#define __BUILTIN_AVR_DELAY_CYCLES 1
#define __DEC32_EPSILON__ 1E-6DF
#define __UINT32_MAX__ 4294967295UL
#define __LDBL_MAX_EXP__ 128
#define __WINT_MIN__ 0U
#define __SCHAR_MAX__ 127
#define __WCHAR_MIN__ (-__WCHAR_MAX__ - 1)
#define __INT64_C(c) c ## LL
#define __DBL_DIG__ 6
#define __GCC_ATOMIC_POINTER_LOCK_FREE 1
#define __SIZEOF_INT__ 2
#define __SIZEOF_POINTER__ 2
#define __USER_LABEL_PREFIX__
#define __STDC_HOSTED__ 1
#define __LDBL_HAS_INFINITY__ 1
#define __FLT_EPSILON__ 1.19209290e-7F
#define __LDBL_MIN__ 1.17549435e-38L
#define __AVR_SFR_OFFSET__ 0x20
#define __DEC32_MAX__ 9.999999E96DF
#define __INT32_MAX__ 2147483647L
#define __SIZEOF_LONG__ 4
#define __UINT16_C(c) c ## U
#define __DECIMAL_DIG__ 9
#define __AVR_2_BYTE_PC__ 1
#define __LDBL_HAS_QUIET_NAN__ 1
#define __BUILTIN_AVR_SEI 1
#define __GNUC__ 4
#define __BUILTIN_AVR_SWAP 1
#define __FLT_HAS_DENORM__ 1
#define __SIZEOF_LONG_DOUBLE__ 4
#define __BIGGEST_ALIGNMENT__ 1
#define __UINT24_MAX__ 16777215UL
#define __BUILTIN_AVR_NOP 1
#define __DBL_MAX__ ((double)3.40282347e+38L)
#define __INT_FAST32_MAX__ 2147483647L
#define __DBL_HAS_INFINITY__ 1
#define __DEC32_MIN_EXP__ (-94)
#define __BUILTIN_AVR_FMULSU 1
#define __INT_FAST16_TYPE__ int
#define __LDBL_HAS_DENORM__ 1
#define __DEC128_MAX__ 9.999999999999999999999999999999999E6144DL
#define __INT_LEAST32_MAX__ 2147483647L
#define __USING_SJLJ_EXCEPTIONS__ 1
#define __DEC32_MIN__ 1E-95DF
#define __DBL_MAX_EXP__ 128
#define __DEC128_EPSILON__ 1E-33DL
#define __PTRDIFF_MAX__ 32767
#define __AVR_ENHANCED__ 1
#define __BUILTIN_AVR_WDR 1
#define __LONG_LONG_MAX__ 9223372036854775807LL
#define __SIZEOF_SIZE_T__ 2
#define __SIZEOF_WINT_T__ 2
#define __GXX_ABI_VERSION 1002
#define __INT24_MAX__ 8388607L
#define __FLT_MIN_EXP__ (-125)
#define __INT_FAST64_TYPE__ long long int
#define __DBL_MIN__ ((double)1.17549435e-38L)
#define __DEC128_MIN__ 1E-6143DL
#define __REGISTER_PREFIX__
#define __UINT16_MAX__ 65535U
#define __DBL_HAS_DENORM__ 1
#define __AVR_ARCH__ 4
#define __UINT8_TYPE__ unsigned char
#define __NO_INLINE__ 1
#define __FLT_MANT_DIG__ 24
#define __VERSION__ "4.7.0"
#define __UINT64_C(c) c ## ULL
#define __MEMX __memx
#define __GCC_ATOMIC_INT_LOCK_FREE 1
#define __FLOAT_WORD_ORDER__ __ORDER_LITTLE_ENDIAN__
#define __INT32_C(c) c ## L
#define __DEC64_EPSILON__ 1E-15DD
#define __ORDER_PDP_ENDIAN__ 3412
#define __DEC128_MIN_EXP__ (-6142)
#define __INT_FAST32_TYPE__ long int
#define __UINT_LEAST16_TYPE__ short unsigned int
#define __INT16_MAX__ 32767
#define __SIZE_TYPE__ unsigned int
#define __UINT64_MAX__ 18446744073709551615ULL
#define __INT8_TYPE__ signed char
#define __ELF__ 1
#define __FLT_RADIX__ 2
#define __INT_LEAST16_TYPE__ short int
#define __LDBL_EPSILON__ 1.19209290e-7L
#define __UINTMAX_C(c) c ## ULL
#define __INT24_MIN__ (-__INT24_MAX__-1)
#define __SIG_ATOMIC_MAX__ 32767
#define __GCC_ATOMIC_WCHAR_T_LOCK_FREE 1
#define __SIZEOF_PTRDIFF_T__ 2
#define __AVR 1
#define __DEC32_SUBNORMAL_MIN__ 0.000001E-95DF
#define __INT_FAST16_MAX__ 32767
#define __UINT_FAST32_MAX__ 4294967295UL
#define __UINT_LEAST64_TYPE__ long long unsigned int
#define __FLT_HAS_QUIET_NAN__ 1
#define __FLT_MAX_10_EXP__ 38
#define __LONG_MAX__ 2147483647L
#define __DEC128_SUBNORMAL_MIN__ 0.000000000000000000000000000000001E-6143DL
#define __FLT_HAS_INFINITY__ 1
#define __UINT_FAST16_TYPE__ unsigned int
#define __DEC64_MAX__ 9.999999999999999E384DD
#define __AVR_ATmega8__ 1
#define __CHAR16_TYPE__ short unsigned int
#define __PRAGMA_REDEFINE_EXTNAME 1
#define __AVR_HAVE_LPMX__ 1
#define __INT_LEAST16_MAX__ 32767
#define __DEC64_MANT_DIG__ 16
#define __INT64_MAX__ 9223372036854775807LL
#define __UINT_LEAST32_MAX__ 4294967295UL
#define __GCC_ATOMIC_LONG_LOCK_FREE 1
#define __INT_LEAST64_TYPE__ long long int
#define __INT16_TYPE__ short int
#define __INT_LEAST8_TYPE__ signed char
#define __DEC32_MAX_EXP__ 97
#define __INT_FAST8_MAX__ 32767
#define __INTPTR_MAX__ 32767
#define __LDBL_MANT_DIG__ 24
#define __DBL_HAS_QUIET_NAN__ 1
#define __SIG_ATOMIC_MIN__ (-__SIG_ATOMIC_MAX__ - 1)
#define AVR 1
#define __BUILTIN_AVR_FMULS 1
#define __INTPTR_TYPE__ int
#define __UINT16_TYPE__ short unsigned int
#define __WCHAR_TYPE__ int
#define __SIZEOF_FLOAT__ 4
#define __AVR__ 1
#define __UINTPTR_MAX__ 65535U
#define __DEC64_MIN_EXP__ (-382)
#define __INT_FAST64_MAX__ 9223372036854775807LL
#define __GCC_ATOMIC_TEST_AND_SET_TRUEVAL 1
#define __FLT_DIG__ 6
#define __UINT_FAST64_TYPE__ long long unsigned int
#define __INT_MAX__ 32767
#define __INT64_TYPE__ long long int
#define __FLT_MAX_EXP__ 128
#define __AVR_HAVE_MUL__ 1
#define __DBL_MANT_DIG__ 24
#define __INT_LEAST64_MAX__ 9223372036854775807LL
#define __AVR_HAVE_MOVW__ 1
#define __GCC_ATOMIC_CHAR16_T_LOCK_FREE 1
#define __DEC64_MIN__ 1E-383DD
#define __WINT_TYPE__ unsigned int
#define __UINT_LEAST32_TYPE__ long unsigned int
#define __SIZEOF_SHORT__ 2
#define __LDBL_MIN_EXP__ (-125)
#define __INT_LEAST8_MAX__ 127
#define __LDBL_MAX_10_EXP__ 38
#define __ATOMIC_RELAXED 0
#define __DBL_EPSILON__ ((double)1.19209290e-7L)
#define __UINT8_C(c) c
#define __INT_LEAST32_TYPE__ long int
#define __SIZEOF_WCHAR_T__ 2
#define __UINT64_TYPE__ long long unsigned int
#define __INT_FAST8_TYPE__ int
#define __DBL_DECIMAL_DIG__ 9
#define __DEC_EVAL_METHOD__ 2
#define __ORDER_BIG_ENDIAN__ 4321
#define __UINT32_C(c) c ## UL
#define __INTMAX_MAX__ 9223372036854775807LL
#define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__
#define __FLT_DENORM_MIN__ 1.40129846e-45F
#define __INT8_MAX__ 127
#define __UINT_FAST32_TYPE__ long unsigned int
#define __CHAR32_TYPE__ long unsigned int
#define __FLT_MAX__ 3.40282347e+38F
#define __INT32_TYPE__ long int
#define __SIZEOF_DOUBLE__ 4
#define __FLT_MIN_10_EXP__ (-37)
#define __INTMAX_TYPE__ long long int
#define __DEC128_MAX_EXP__ 6145
#define __AVR_HAVE_16BIT_SP__ 1
#define __ATOMIC_CONSUME 1
#define __GNUC_MINOR__ 7
#define __UINTMAX_MAX__ 18446744073709551615ULL
#define __DEC32_MANT_DIG__ 7
#define __BUILTIN_AVR_CLI 1
#define __DBL_MAX_10_EXP__ 38
#define __LDBL_DENORM_MIN__ 1.40129846e-45L
#define __INT16_C(c) c
#define __STDC__ 1
#define __PTRDIFF_TYPE__ int
#define __ATOMIC_SEQ_CST 5
#define __UINT32_TYPE__ long unsigned int
#define __UINTPTR_TYPE__ unsigned int
#define __DEC64_SUBNORMAL_MIN__ 0.000000000000001E-383DD
#define __DEC128_MANT_DIG__ 34
#define __LDBL_MIN_10_EXP__ (-37)
#define __SIZEOF_LONG_LONG__ 8
#define __GCC_ATOMIC_LLONG_LOCK_FREE 1
#define __LDBL_DIG__ 6
#define __FLT_DECIMAL_DIG__ 9
#define __UINT_FAST16_MAX__ 65535U
#define __GNUC_GNU_INLINE__ 1
#define __BUILTIN_AVR_INSERT_BITS 1
#define __GCC_ATOMIC_SHORT_LOCK_FREE 1
#define __BUILTIN_AVR_FLASH_SEGMENT 1
#define __UINT_FAST8_TYPE__ unsigned int
#define __ATOMIC_ACQ_REL 4
#define __ATOMIC_RELEASE 3
#define __BUILTIN_AVR_FMUL 1
Oliver