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NEWS
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*** Changes since AVR-LibC-2.2.0:
* General:
* Improvements and additions:
- Part of the startup code is now optional and has been moved from
gcrt1.S to the device support lib lib<mcu>.a. When the respective
parts of the startup code are not wanted, a specific symbol can be
defined so that the associated code is no more pulled in.
o Define __init_sp to skip initialization of SP in .init2 (#1011).
o Define __init_cvt to skip setting CPUINT_CTRLA.CPUINT_CVT in
.init3 (#1010).
o Define __call_main to skip calling main and exit in .init9 (#1012).
main must be executed by other means, e.g. by putting it in
section .init9.
- Support has been added for: ATxmega16E5, ATA5791, ATA8210, ATA8510 (#876).
- Support has been added for the stpcpy, stpcpy_P, stpcpy_F,
stpcpy_PF, stpcpy_FX functions (#1015).
- Support has been added for some functions on Reduced Tiny (AVRrc):
memmem, memmem_P, strlcpy, strlcpy_P, strcasestr, strcasestr_P,
strspn, strspn_P, strcspn, strcspn_P, strlcat_P, strsep, strsep_P
strpbrk_P, strtok_rP, ltoa, ultoa.
- Support a new header <avr/flash.h> for better support of avr-gcc's
named address spaces __flash and __flashx. For example, it provides
functions like <tt>strcpy_F</tt> and <tt>strcpy_FX</tt> that work
the same like <tt>strcpy_P</tt> and <tt>strcpy_PF</tt> from
<var/pgmspace.h>, but use proper address-space qualifiers.
- Support for Compact Vector Tables has been added as #1010.
It is provided by crt<mcu>-cvt.o. One way to use that variant
of the startup code is by means of avr-gcc -mcvt which is
supported since GCC v15.
- avr-gcc v15 and up issues a diagnostic for __int24 and __uint24 when
-pedantic or similar options are on. Hence __extension__ was
added when using these types in avr/pgmspace.h.
- common/asmdef.h used a sub-optimal definition of XJMP and XCALL (#993).
Outcome was a sub-optimal code generation for some devices like the
ones in avrxmega3/short-calls.
- Improve runtime performance of free() (Request #991).
- Support the ISR_N macro in avr/interrupt.h. This allows to specify the
IRQ number as an argument to the signal attribute, which is supported
since GCC v15 PR116056. It allows to use static functions or functions
defined in a C++ namespace as an ISR. It also allows to define ISR
aliases without the penalty of an additional JMP/RJMP instruction.
(Issue #765).
- Support ISO/IEC TR 18037 functions rdivi, urdivi, lrdivi, ulrdivi (#999).
* Issues closed:
- Since v2.2.0 (Issue #936), gcrt1.S defines symbols __DATA_REGION_ORIGIN__
and __DATA_REGION_LENGTH__ to allow for more precise diagnostics from
the linker when the data region overflows. However, letting .data start
at __DATA_REGION_ORIGIN__ is a relatively new addition in Binutils v2.40
PR29741, whereas using __DATA_REGION_LENGTH__ for .data size is a much
older addition. Outcome may be that the linker script adopts the true
size of .data but not its start address, resulting in incorrect errors
from the linker (Issue #971). In order to resolve #971, a configure
test has been added that checks for PR29741, and only defines the mentioned
symbols when PR29741 is available. A similar test has been added for
PR31177 which is a similar feature for the .text region.
- On Reduced Tiny, add 0x4000 to the symbol address when
pgm_get_far_address() takes the address of an object in PROGMEM_FAR.
This works similar to how the compiler implements the &-operator
for PROGMEM objects (Issue #970).
- Fixed memccpy (and memccpy_P) on AVRrc (#1018).
- Fixed atoi and atol on AVRrc (#1019).
- Define types from stdint.h like int32_t without attribute((mode)).
(Issue #496)
- ld: undefined reference to `E2END' #973
- Don't skip 2-word instructions on cores with an according silicon bug.
This will fix AVR-LibC build warnings like
> libc/stdlib/ctype.S:80: Warning: skipping two-word instruction
as mentioned in #994.
- The str[n]casecmp_PF functions used an algorithm that lead to different
results compared to str[n]casecmp[_P]. The far versions have been
fixed so that they comply to POSIX.1-2008. (Issue #1009)
- fflush() is now implemented as a proper (non-inline) function so that
features like --wrap will work as expected (#1017, #1003).
* Pull requests:
* Other changes:
*** Changes in AVR-LibC-2.2.0:
* General:
- Project moved to Github
- Support for many new devices has been added, like devices from the
AVR 0-series, 1-series, 2-series, AVR-Dx and AVR-Ex, but also for
some older devices.
- Parts of the user manual have been reworked, like the inline assembly
Cookbook and the documentation of memory sections.
- The multilib layout of the library, and what device belongs to which
multilib variant, is no more hard coded in AVR-LibC but follows the
compiler's multilib layout.
* Improvements and additions:
- Add support to new multilib layout / 64-bit [long] double compiler
(Issues #642, #670)
- Added support for new devices (Issue #824):
ATtiny202 ATtiny204 ATtiny212 ATtiny214 ATtiny402 ATtiny404
ATtiny406 ATtiny412 ATtiny414 ATtiny416 ATtiny417 ATtiny424
ATtiny426 ATtiny427 ATtiny804 ATtiny806 ATtiny807 ATtiny814
ATtiny816 ATtiny817 ATtiny824 ATtiny826 ATtiny827 ATtiny1604
ATtiny1606 ATtiny1607 ATtiny1614 ATtiny1616 ATtiny1617 ATtiny1624
ATtiny1626 ATtiny1627 ATtiny3214 ATtiny3216 ATtiny3217 ATtiny3224
ATtiny3226 ATtiny3227 ATmega808 ATmega809 ATmega1608 ATmega1609
ATmega3208 ATmega3209 ATmega4808 ATmega4809
- Added support for AVR-Dx devices (Issue #881):
AVR16DD14 AVR16DD20 AVR16DD28 AVR16DD32 AVR32DA28 AVR32DA32
AVR32DA48 AVR32DB28 AVR32DB32 AVR32DB48 AVR32DD14 AVR32DD20
AVR32DD28 AVR32DD32 AVR64DA28 AVR64DA32 AVR64DA48 AVR64DA64
AVR64DB28 AVR64DB32 AVR64DB48 AVR64DB64 AVR64DD14 AVR64DD20
AVR64DD28 AVR64DD32 AVR128DA28 AVR128DA32 AVR128DA48 AVR128DA64
AVR128DB28 AVR128DB32 AVR128DB48 AVR128DB64
AVR64DU28 AVR64DU32
- Added support for AVR-Ex devices:
AVR16EA28 AVR16EA32 AVR16EA48 AVR16EB14 AVR16EB20 AVR16EB28 AVR16EB32
AVR32EA28 AVR32EA32 AVR32EA48 AVR64EA28 AVR64EA32 AVR64EA48
- Added support for Reduced Tiny devices:
ATiny102 ATtiny104
- Added support for Classic devices:
ATmega168PB ATmega328PB ATmega324PB
- Added a new module to lib<mcu>.a that can be used as part of the
startup code by the compiler. The compiler will link the code when
a device from the AVR-Dx or AVR-Ex families uses a non-default layout
of NVMCTRL_CTRLB.FLMAP (Issue #931, Binutils PR31124, GCC PR112944).
For more details on the feature see the GCC v14 release notes at
https://gcc.gnu.org/gcc-14/changes.html#avr
- Added support for: strndup.
- Added support for: PROGMEM_FAR, PSTR_FAR, strchr_PF.
- Added support for ccp_write_spm() in avr/cpufunc.h
- The delay routines no more include math.h but use built-in functions
__builtin_fabs and __builtin_ceil instead of fabs and ceil. This means
the delay routines are now independent of -f[no-]freestanding (Issue 580).
- Added macros pgm_read_qword, pgm_read_qword_near, pgm_read_qword_far.
- Added inline functions to read from progmem that return a type as
indicated by the function name, like char pgm_read_char (const char*).
The functions adjust to -mint8, -mdouble= and -mlong-double=.
Functions for fixed-width types are pgm_read_i64, pgm_read_u24, etc.
* Functions that read from beyond 64 KiB are suffixed _far and take
an uint_farptr_t as argument.
* pgm_read_float has been turned from a macro that takes uint16_t to
an inline function that takes const float*.
* pgm_read_byte, pgm_read_word and pgm_read_dword remain as they were
and still take an uint16_t argument for compatibility and legacy code.
- Added experimental templates pgm_read<> and pgm_read_far<>. They are
only available when macro __pgm_read_template__ is defined.
- Added EEPROM support for: double, long double, uint64_t (*_qword).
- AVR-LibC does not use section .progmem.* any more for lookup tables and
string literals. Instead, .progmemx.* is used which does not require
that the data resides in the lower 64 KiB of program memory.
This means that on devices with more than 64 KiB of program memory,
the ELPM instruction is used to read the data where formerly it was LPM.
Hence code size and execution times on such devices will slightly
increase for functions from the printf and scanf families, and for libm
functions that use power series. (Issue #962).
Notice that only since Binutils v2.29 (PR21849), section .progmemx is
located after the .text sections.
- The startup code now defines symbols like __DATA_REGION_LENGTH__ and
__DATA_REGION_ORIGIN__ according to the memories of the used AVR device
(Issue #936). These symbols are used by the default linker scripts to
diagnose when the text or data region overflows.
To date, only a core specific default value was used, but the devices
that belong to the same core architecture have different memory sizes.
- The pgm_read_* and pgm_read_*_far macros and functions now also work for
the Reduced Tiny devices. (Issue #563). The implementation assumes that
GCC implements PR71948 which was added in v7. Notice that on Reduced Tiny:
* There is no need for PROGEM at all because all const objects in static
storage are located in program memory since Binutils v2.27 (PR20849).
* Even when PROGMEM is used, no pgm_read functions or macros are required.
See the GCC documentation on the __progmem__ attribute for Reduced Tiny.
* Issues closed:
- [patch #9543] Add avrxmega3 devices. #824
- [bug #49567] Use meta-info from --print-multi-lib and
--print-multi-directory #642
- [bug #57071] Fix math.h and function names that block 64-bit
double #670
- Issue #476 [bug #32945] RAMPZ clobbered in far-pointer library.
Functions from the far-pointer library in libc/pmstring like
memcpy_PF that read from program memory using ELPM must set
RAMPZ to the high byte of the 24-bit address. On devices that
don't use RAMPZ exclusively with ELPM, RAMPZ has to be reset when
the function is finished. These are devices with an EBI (External
Bus Interface): ATxmega64A1, ATxmega64A1U, ATxmega128A1,
ATxmega128A1U, ATxmega128A4U.
- Add device support to avr/power.h for:
ATtiny441 ATtiny841
- FDEV_SETUP_STREAM from stdio.h now works with C++ (Issue #898)
- More than 80, mostly historic issues have been closed -- too many
to mention all of them here
- Fixed wrong prototypes of frexp, frexpf, frexpl in math.h (Issue #929)
- time.h: function mktime() is off by 1h when [EU] DST is active (Issue #967)
* Pull requests:
- Logo [#969]
- Documentation fixes [#968]
- Issue #962 - libm: Use ELPM for tables on ELPM devices. [#964]
- Issue #934: Fix EEPROM write issue on AVR-Ex and AVR-Dx family [#948]
- Add code to initialize NVMCTRL_CTRLB.FLMAP in new module flmap-init.S enhancement [#947]
- Add AVR-Ex devices enhancement [#946]
- Issue 940 runtest [#941]
- include/avr/io*.h: Update I/O header files enhancement [#938]
- Issue #936: Provide symbols for exact memory layout. enhancement [#937]
- Issue #931: Initialize NVMCTRL_CTRLB.FLMAP for Devices that have it. enhancement [#935]
- Issue #931: Initialize NVMCTRL_CTRLB.FLMAP for Devices that have it. [#933]
- Issue 929: Remove __ATTR_CONST__ from frexp* prototypes in math.h. [#932]
- #890 #884: Fix / add entries for ATmega808/9, ATmega1608/9, ATmega3… [#927]
- #921: Use all h files of $srcdir/include/avr in Makefile.am. enhancement [#925]
- #892: configure.ac has outdated CHECK_AVR_DEVICE and AM_CONDITIONAL l… [#924]
- avrxmega3: fix header installation for attiny424 [#921]
- Rename aux.c to _aux_.c duplicate [#920]
- iom32u4.h #define USBRF 5 [#919]
- memory: Allow the use of stdint types [#918]
- doc: Note attiny9 being supported documentation [#915]
- Fix __BOOT_SIGROW_READ for some ATtiny [#914]
- .githud [#908]
- Extend _delay_loop_2 so it works with AVR_TINY. [#902]
- Fix inline asm constraints of wdt_enable, wdt_disable. [#901]
- Use autotools to determine Python command to run mlib-gen.py. [#896]
- Issue #894: Remove scripts that make binary distributions and RPMs. [#895]
- Fix issue #892: [#893]
- Fix some avrxmega3 device names of generated files [#885]
- .gitignore: Add outputs of ./boostrap [#883]
- *.py: Use python3 instead of python [#882]
- Added support for AVR-DA and DB devices [#881]
- README.md: fix typo in URL [#873]
* Other changes:
*** Changes in AVR-LibC-2.1.0:
* Improvements and additions:
- Patch #9187 improved the library coverage for the AVR_TINY
architecture (ATtiny10 and relatives). In particular, many
of the functions from <string.h> are now available there.
- Patch #8729 adds ISR_NOICF and ISR_FLATTEN to <avr/interrupt.h>
* Bugs fixed:
[#36933] Documentation no longer correctly describes how to declare
[#41689] add static_assert to assert.h
[#48898] power_usart3_* functions no more defined in power.h
[#49020] dtostre() flags documentation error
[#49447] Example code for uart_putchar() has error in recursive call
strings for storage in program memory
[#50439] avr/iom32u4.h does not define PRTIM4
[#51755] iotn441.h & iotn841.h missing definitions for PUEA[0-7] and PUEB[0-3]
[no-id] util/eu_dst.h: fix reversed DST decision logic for March and October
[no-id] util/delay.h.in: add missing return
* New devices supported:
* Contributed Patches:
[no-id] Define weak symbols for known memory region sizes based on device
header definitions, starting with fuse region.
[#8961] Update test script for new simulavr and library layout
[#8964] Update tests isinf-01.c, signbit-01.c and modf-np.c
[#9163] New eeprom write block function for xmega using eeprom page write
[#8729] [avr/interrupt.h] Add ISR_NOICF, ISR_FLATTEN. Fix namespace of identifiers.
[#8536] Fix a typo within <stdio.h>
[#8649] small documentation fixes in
[#9187] [AVR_TINY]: Support 16-bit xtoa functons and more string functions.
[#9400] Add avrxmega3 multilibs
[#9659] Update eeprom_is_ready for avrxmega3 devices
[#9553] Fix some issues in libc/
[#9864] Use proper float function names and prototypes
* Other changes:
*** Changes in AVR-LibC-2.0.0:
* General:
This is the first official release supporting AVR-GCC 5 (and above).
* Bugs fixed:
[#33698] Explicit use of RJMP/RCALL can cause "relocation truncated to fit:
R_AVR_13_PCREL" linker error
[#34719] Check for right build compiler
[#43011] Bug in struct definition of __reg_UCSR1C and __reg_UCSR0C in iom128rfa1.h
[#43044] memory sections require __attribute__ ((used))
[#43828] wdt.h: Wrong inline assembler arguments
[#44140] wdt_disable() macro clobbers prescaller bits
[#44279] incorrect USB_TRNCOMPL_vect_num in iox64a1u.h, iox128a1u.h
[#44515] Wrong build option '-mtiny-stack' instead of '-msp8'
[#44574] Place device-specific libraries in their multilib directory
[#44869] trunk doesn't work with gcc 5.1.0-RC-20150412
[#44977] Incorrect PORT_t and CRC_t definitions for ATxmega64A1U and 128A1U
[#45539] iom32u4.h defines reserved IO address (TIMSK2 (0x70), TIMSK5 (0x73) etc)
[#45551] Power-save mode not supported for ATtiny167
[#36303] Wrong hour for EU Summertime
[#44514] Wrong build option '-mtiny-stack' instead of '-msp8'
[no-id] TC_EVACT_FRQ_gc was misspelled as TC_EVACT_FRW_gc in some Xmega
header files
[no-id] LOCKBITS renamed to LOCK_BITS in Xmega header files as LOCKBITS
clashes with definition in lock.h. Added missed defines to ADC_CH_MUXPOS_enum.
Corrected pinmux values in ADC_CH_MUXNEG_enum.
[no-id] Fix typos and incorrect definitions in header files.
* New devices supported:
- ATA6616C, ATtiny441, ATtiny841, ATA6612C, ATA6617C, ATA664251, ATmega48PB,
ATmega88PB, ATA5702M322, ATA5782, ATA5790N, ATA5831, ATA6613C, ATA6614Q,
ATmega64HVE2, ATxmega8E5, ATxmega32C3, ATxmega32D3, ATxmega32E5
* Contributed Patches:
[no-id] save & restore rampd register in xmega wdt_enable and wdt_disable
[#8543] Fix multiple issues with device header files
[#8557] Proposing to remove device specific xmega macros from sleep.h
[#8563] Generalize power reduction macros in power.h by removing hard coded device names
[#8564] Add dwarf debug info alternative, build printf with debug info
[#8565] Compute and include device header file name from
__AVR_DEV_LIB_NAME__ as fallback in io.h.
[#8587] Move device specific functions to libdev.a
[#8590] WDT enable/disable for devices with CCP
[#8610] Remove eeprom function name mangling
[#8716] Enable setjmp/longjmp functions for AVR_TINY architecture
[#8718] Enable EEPROM memory map only for devices with EEPROM Data Memory
Mapping Enable bit (EEMAPEN)
[#8731] Header file for atmega644a
[#8728] Use __extension__ with long long
[#8556] Fix atexit.c
[#8810] Fix LFUSE_DEFAULT for tiny24a/44a
[#8902] Xmega's PROTECTED_WRITE is incorrect for IO registers whose address
is more than one byte
* Other changes:
Overhaul of doxygen documentation.
*** Changes in AVR-LibC-1.8.1:
* Bugs fixed:
[#31267] misleading header iom128rfa1.h
[#35197] sleep.h _BV defined as __BV in AT90S8515 section
[#35226] Online-documentation broken - [...]
[#35398] assert doesn't work unless stdlib.h is also included
[#35498] misspelled in <util/setbaud.h>
[#35539] stdlib.h does not provide EXIT_SUCCESS et al.
[#35948] iom32u4.h for ATmega32U4 incorrectly defines Timer 2
[#35971] attiny4313 (2313a) pin-change interrupts PCINT[0...2] vect etc
[#36053] Declaration of the register USIBR missing for ATtiny2313a/4313
[#36410] avr/boot.h: poisoned SPMCR for ATmega128
[#36454] string.h: Error for long long in C90
[#36581] avr-libc: pgmspace.h is not ANSI compliant
[#37103] ATtiny5/9/10/20/40 watchdog can't be enabled
[#37778] _MemoryBarrier() in cpufunc.h error on compile
[#38135] Install a dummy stdfix-avrlibc.h
[#38516] Missing TWI and UCSR1D definitions for ATmega16/32 U4
[#39049] Clock prescaler set and get are missing for TINY architecture
[#39783] CRC missing definitions and incorrect power macros for xmega D3
[#40003] Integer type promotion leads to inefficent code in wdt.h
[#40206] incorrect SP init in startup code for xmegas
[#40567] Invalid names in iotn13a.h (EEPE/EEMPE/BODS/BODSE)
[#40569] sleep_bod_disable does not work in attiny13a
[#40595] iotn2313a.h: wrong fuses definitions for High Fuse Byte
[#41006] iom328p.h: wrong fuse defaults
[#41519] wrong SPM_PAGESIZE definition in iotn[48]8.h
[#42024] build break regarding avrtiny10
[#42084] wrong LFUSE_DEFAULT in iotn84a.h
[#42085] HFUSE_DEFAULT not defined for iotn84.h
[#39779] PCIE0 and PCIE1 defined incorrectly for mega165a and mega165pa devices
[#38614] dtostrf - wrong behavior or wrong documentation
[#42957] missing SPMCSR defines in iom328p.h#
[#41690] Bit definitions for SPMCSR
[no-id] XXX_vect_num not consistent io90pwmx.h, iousbxx6_7.h
[no-id] Specialize clock_prescale_set/get for mega hvb devices
[no-id] Update register and bit definitions for tiny 13a/24a/44a/84a,
tiny167 and mega328p
* New devices supported:
- ATmega256RFR2, ATmega2564RFR2, ATmega128RFR2, ATmega1284RFR2,
ATmega64RFR2, ATmega644RFR2, AT90pwm161, ATA5272, ATA5505, ATA5790,
ATA5795, ATA6285, ATA6286, ATmega1284, ATmega128A, ATmega164PA,
ATmega165PA, ATmega168PA, ATmega3250PA, ATmega325PA, ATmega3290PA,
ATmega32A, ATmega48PA, ATmega64A, ATmega8A, ATtiny1634, ATtiny828,
ATxmega128A3U, ATxmega128A4U, ATxmega128B1, ATxmega128B3, ATxmega128C3,
ATxmega128D4, ATxmega16A4U, ATxmega16C4, ATxmega192A3U, ATxmega192C3,
ATxmega256A3BU, ATxmega256A3U, ATxmega256C3, ATxmega32A4U, ATxmega32C4,
ATxmega384C3, ATxmega384D3, ATxmega64A3U, ATxmega64A4U, ATxmega64B1,
ATxmega64B3, ATxmega64C3, ATxmega64D4
* Contributed Patches:
[#3729] Printf for integers speed up
[#7212] Add pgm_read_ptr() macros to pgmspace.h
[#7220] Add UBRR overload functionality to <util/setbaud.h>
[#7260] Addition to power.h
[#7485] CRC8-CCITT
[#7654] include/delay.h: delay_us >255us without decreasing resolution
[#7826] Add ATMega32u4 support to the led-blinking demo
[#7909] Adding __volatile__ to __asm__ within pgmspace header
[#7910] Add missing PCINT2_vect to iotn40.h and update all the
following vector numbers
[no-id] correction in xmega wdt_enable and wdt_disable added for xmega
[#8499] Device ata6289 should be of avr4 architecture
[no-id] Add RAMSTART, fix RAMSIZE, RAMEND and FLASHEND in device headers
[#8512] Rename tiny arch to avrtiny to sync with binutils
* Other changes:
- New macro _PROTECTED_WRITE(): write to Xmega IO registers that are
protected through the CCP mechanism
- Add support for scanf() conversion macros for 8-bit data types to
<inttypes.h>: SCNd8, SCNdLEAST8, SCNdFAST8, SCNi8, SCNiLEAST8,
SCNiFAST8, SCNo8, SCNoLEAST8, SCNoFAST8, SCNu8, SCNuLEAST8,
SCNuFAST8, SCNx8, SCNxLEAST8, SCNxFAST8
- Add time.h package, C standard functions such as mktime() and localtime,
along with 'ephemera' such as solar declination, time of sun rise and set.
- Introduce new configure option --with-debug-info=INFO, where INFO
can be either stabs, dwarf-2, or dwarf-4. By default, no debug
information will be generated.
- Add IO register debug symbols to crt*.o, so debuggers can see the
per-device defined IO registers (and __eeprom).
- A number of changes have been applied to make avr-libc more C++
aware.
*** Changes in AVR-LibC-1.8.0:
* Bugs fixed:
[#17815] Configure does not honor --mandir option
[#23234] Alternate interrupt macro
[#24861] Interrupt documentation contains extra include
[#32103] Support for Target-Triplets
[#32419] Incorrect EEPROM size in header for ATxmega192A3
[#32650] Missing include in util/delay.h
[#32675] power_all_enable/disable does not affect timer1 on ATmega164P
[#32698] power.h has additional endif that will break the build
[#32773] stdiodemo source code is broken
[#32988] Internal compiler error: build_unary_op
[#33130] twitest.c source code is broken
[#33230] Sleep modes have incorrect names for ATtiny261/461/861
[#33238] Wrong _VECTORS_SIZE for mega8U2 et al
[#33858] in avr/power.h, clock_prescale_set() not defined for mega328
[#33920] ICR1 incorrectly defined for tiny167
[#34047] missing math.h include in delay.h
[#34514] misspelled in math.h
[#35020] stdint.h: signed types need explicit "signed"
[#35093] strlcat_P fails for some destinations
[no-id] New names for CLKSTA/CLKSEL0/1 for AT90USB82/162
system when power_all_disable() is used
[no-id] util/delay.h would not compile with -ffreestanding
* New devices supported:
* Contributed Patches:
[#7531] Bad name of bit in TCCR0A : WGM0 instead of CTC0 for ATtinyX61
[#7362] iom16a.h: USART vectors inconsistently named for ATmega16A
[#7226] ATMEGA8U2 Patches
* Other changes:
- The old prog_* typedefs are now deprecated, and are only included
if requested by the user. This request is expressed by declaring
the macro __PROG_TYPES_COMPAT__, either by a #define directive
before including <avr/pgmspace.h>, or by a -D compiler option.
- Optimized strlen_P, thanks to Jan Waclawek. Rename strlen_P to be
__strlen_P and add new strlen_P inline function in header file that
checks if value is a constant and known at compile time. If not,
then the new inline function calls __strlen_P as normal.
*** Changes in AVR-LibC-1.7.1:
* Bugs fixed:
[Atmel: #11793] XMEGA A devices: 4096-cycle DAC refresh interval setting has wrong name
[Atmel: #12314] Hi-Res(CTRLA) and AWex (FDEMASK)
[Atmel: #12536] Remove CALCTRL in xmega header files.
[no-id] Fix wrong vector table size for ATmega168A devices.
[#29235] power.h - warning: comma at end of enumerator list
[#30783] Missing prototype in power.h
[#31270] Stale link to Philips (now NXP) I2C specification/users manual
* New devices supported:
ATTiny84a
ATMega16HVB RevB
ATMega32HVB RevB
* Contributed Patches:
* Other changes:
*** Changes in AVR-LibC-1.7.0:
* Bugs fixed:
[Atmel: #7159] the memory location of tccr0b is mixed with tccr0a for tiny48/88
[no-id] Fix CLKPCE bit value to be 7.
[no-id] inlining failed in call to '_delay_ms': function body not available
[no-id] malloc() could allocate memory beyond the limits of heap
[no-id] xmega header file updates.
[no-id] Enable ATmega128RFA1 in <avr/power.h>
[no-id] longjmp() writes to EIND register, it is forbidden by AVR-GCC's API
[no-id] Define _VECTORS_SIZE in iom3000.h
[no-id] Redefine __tmp_reg__ and __zer_reg__ for AVR TINY.
[AVR Tools: #9724] Error in ATtiny13A include file, PRR register
[sourceforge.net: #1836849] Multiplication does not work for AT90USB162
[sourceforge.net: #1883630] ATmegaXX4 - USART0 and USART1 additional bits aliases
[sourceforge.net: #1910885] Typo in io90pwm3b.h
[sourceforge.net: #1913681] Missing INT3 define in io90pwm3b.h
[sourceforge.net: #1957780] New 'FUSES-support' gives error in c++ files
[sourceforge.net: #1969436] Wrong flash size for ATmega32U4
[sourceforge.net: #2010688] ATtiny48 SPSR register bits
[sourceforge.net: #2012448] ATmega6450 USART Interrupts
[sourceforge.net: #2016128] Incorrect ATMega32[c1|m1] Header Entries
[sourceforge.net: #2018957] Wrong SPM_PAGESIZE for mega1284P
[sourceforge.net: #2033993] User manual: data symbol spec incorrect
[sourceforge.net: #2305703] iom162.h ASSR bitdef, typo?
[sourceforge.net: #2411516] Error/Bug in the iotn88.h file
[sourceforge.net: #2420567] ATmega329P missing in sleep.h
[sourceforge.net: #2693898] ATmega32U6 missing in power.h
[sourceforge.net: #2738926] avr/eeprom.h EEGET and EEPUT
[sourceforge.net: #2812125] ATmega16U4 missing in power.h
[sourceforge.net: #2913419] Misspelled Structure Element - xmega
[#3485] Using float arithmetic without linking with -lm result in incorrect code
[#19079] sscanf %s eats 1 char too much
[#19494] sfr_defs.h documentation: Remove references to deprecated macros.
[#21410] Incorrect use of 16-bit eeprom addresses in devices with 8-Bit address registers
[#21621] Allow autoconf 2.61
[#21622] Support building in a subdirectory
[#21623] boot.h: Use the "z" register constraint
[#21869] Multiple defines in iotn2313.h
[#21872] __floatunsisf/undisf incorrectly named
[#21905] scanf: float conversion ignores the suppression symbol
[#21906] scanf: float conversion, wrong width count in case of sign or exponent
[#21931] Wrong fuses defined for the ATMEGA88/168
[#21935] Typo in avr-ar example avr-as should be avr-ar
[#21995] pgm_read_xxxx() does not use enhanced LPM instruction
[#21958] UBRR0/UBRR1 SFR is redefined for ATmegaXX8p and atmega1284p devices
[#21962] PSYNC1_0 a PSYNC1_1 bits not defined for AT90PWM3B and AT90PWM316 devices
[#21986] Typo in iotn13.h
[#22016] Typo in iotn2313.h: SIG_OUTPUT_COPMARE0A
[#22119] Misleading statement in FAQ
[#22153] setjmp.o is wrong in libc.a (1.6.1) for avr's with SPH
[#22240] Add EEPROM Page Size to header files
[#22276] wdt_reset fails with devices with large WDTCSR addresses
[#22377] Wrong XRAMEND for some recent ioXXX.h header files.
[#22387] Missing EIMSK and __EEPROM_REG_LOCATIONS__ in iom168p.h
[#22390] Unclear note about function pointers
[#22447] Summary of iom?8p.h header updates needed
[#22493] Typo in iom1284p.h.
[#22540] Adding signature bytes to header files
[#22548] Missing IVCE and IVSEL in iom328p.h
[#22568] Missing EEPROM_REG_LOCATIONS in iom328p.h
[#22572] Documentation FAQ example proposal
[#22642] AT90USB162 and AT90USB82 not supported in <avr/power.h>
[#22643] math.h c99 incompability
[#22666] io90pwm3b.h errors
[#22785] ATMega644P Support Missing from avr/include/avr/sleep.h
[#22828] eeprom_write_block(): incompatibility in args order
[#22834] ATmega164P/324P/644P/1284P lack BODS/BODSE bits in MCUCR
[#22870] Error in wdt.h and ATmega164P
[#22877] Fuse information wrong for xmega devices.
[#22878] eeprom_*_word/dword/block cause hang in ATmega256x
[#23004] Watchdog enable docu only generated for Xmega series
[#23032] Define PORTxn, PINxn, DDxn bit names in iomxx4.h.
[#23166] atmega328p does not have SPMEN
[#23261] AT90USB162 and AT90USB82 missing power_all_[enable,disable]() in power.h
[#23409] Provide an implementation for strtok()
[#23546] FAQ documentation symbol seems wrong
[#23554] Wrong bit values in iom32u4.h
[#23677] Request for cbrt() and strdup to be added to libc
[#23703] eeprom write functions optimisation
[#23774] Using some defines from avr/fuse.h produces warning
[#23850] ATMega8 does not have MCUSR defined
[#23871] clock_prescale_set() not available for ATmega32U4
[#23959] Small typo in deprecated documentation
[#23969] eeprom_read_byte() throws interrupt EE_READY although EERIE is cleared, controller resets
[#24207] Example in inttypes.h is wrong
[#24446] _attribute_ should be __attribute__ (with double underscores)
[#24762] 1.6.3 wdt.h compile-time bug
[#24890] Small error in libm source fp_rempio2.S
[#25048] eeprom.h will not compile as c++ code.
[#25120] pgm_read_*_far() functions cause incorrect usage of the Z pointer for RAM access in ATxmega series
[#25131] Incorrect definition of default lfuse bits for ATTiny2313
[#25261] TWIHSR spelling deviates from XML file in AVR Studio 4.15
[#25535] Nonexistent bit definitions in iotn88.h/iotn48.h AREFD REFS1 RWWSB SM2
[#25645] xmega header files broken #defines
[#25723] Realloc corrupts free list when growing into the next free item
[#25846] include/avr/power.h:628:1: error: missing binary operator before token "defined"
[#25925] <avr/boot.h> cannot be included on Xmega devices
[#25929] boot.h Fuse read not compatible with Tiny48/88.
[#25930] New IO-Headerfiles missing PXn Portpindefinitions
[#26188] Wrong or missing definition of SIGNATURE_X in iom644.h and others
[#26284] boot_lock_fuse_bits_get does not compile under gcc 4.3.X
[#26308] WDE defined as WDE3 in io90pwm3b.h and io90pwm2b.h
[#26767] XMEGA GPIO register name discrepancy
[#26809] Some common math constants missing in math.h
[#26840] Missing #define in iom32m1.h
[#26876] include io.h into fuse.h
[#27201] _WORDREGISTER in xmega headers does not work in C99 mode
[#27235] malloc: Several things go wrong
[#27242] realloc: serious error when size shrinks
[#27243] malloc: small error in comment
[#27367] RAMSTART missing in elder device header files
[#27434] Arguments of macros must be protected in parentheses
[#28575] Minor bug in iousb162.h - missing FUSE_ prefixes
[#28688] using_tools.dox fails to build due to extra underscore
[#28756] Bug in AVR-LibC 1.6.7 (power.h for 8-bit AVR)
[#28812] iotn48.h TWS# bits off by one
[#28584] iocanxx.h Add word definitions to iocanxx.h
[#28627] power.h ATMEGA32U2 clock_prescale_set() not available
[#28901] Xmega header files with missing definitions for GPIO_t and CPU_t
[#28574] Xmega D ADC struct missing registers
[#28582] XMEGA A3B, RTC32 not properly supported
[#28921] pointer to function > 128k flash
[#29502] literal error in iox128a1.h
[#29653] PUD bit missing for at90usb82
[#29950] ATtiny167 SPM_PAGESIZE Discrepancy
[#30018] Errors in include files
[#30085] memcpy_P on XMega does not clr NVM.CMD before copy
[#30104] power.h - Missing "power_usart1_/enable/disable()" functions for ATmega644
[#30148] XMEGA register discrepancy
[#30600] Missing processor spec - wdt.h include file
[#30597] Missing definition for ATmega16/32/64m1/c1
[#30475] SPM_PAGESIZE is incorrect in io90pwm3b.h and io90pwm2b.h
[#30552] Missing definition ADCW
[#30569] ATmega16U4/32U4 wrong bit definition
[#30669] Improve comment in stdiodemo
[#30735] bug in example twitest
[#31086] ATTINY88 RAMEND value not set to correct value in iotn88.h
[#30363] _delay_xx() functions in <util/delay.h> are broken
[#31990] PRPSC0 used in power.h for AT90PWM81 instead of PRPSCR
[#31873] power_aes_enable/disable() are commented in power.h for xmega devices
* Other changes:
- Added 'avr35' architecture. Now 'MOVW' and 'LPM Rx, Z[+]' instructions
supported for AT90USB82 and AT90USB162 devices. GCC 4.3 or above is
necessary to use this.
- Function vfscanf() is rewriten. The float point version is optimized
considerably: the expense of a stack was cut by half, and the size of
function has decreased approximately on 1KB. Opportunities of standard
and minimal versions are expanded, and their size has remained at a
former level.
Briefly:
. Restrictions of a float point format are eliminated.
. Conversion '%[' is present in standard version now.
. The minimal version differs from standard only absence of '%[' conv.
. The 'hh' type qualifier is added ('char *', C99).
. The maximal field width is increased up to 255 (65535 in float version).
. All known bugs are fixed.
New vfscanf() concedes old in:
. The size of the minimal and standard versions has increased for old
branches of compiler (less 4.1) and ancient chips (without MOVW).
. The maximum quantity of conversions now is limited (255).
- EEPROM functions are rewriten. Now they are pure asm functions. The
reading of long word or block is speed up. New functions for 32-bit
words and floats are added. The group of 'update' (burn only different
bytes) functions is added. A set of Avr-libc bugs are fixed.
- Added support for XMEGA architectures.
- The Postscript documentation build has been removed in favour of
building only the PDF (and HTML and man page) versions. PDF offers
the same printing quality as postscript at a smaller file size.
This also works around a bug in doxygen 1.5.7 where it appears to
be no longer possible to set GENERATE_HTML = NO.
- A sleeping BOD API was added to <avr/sleep.h>. This allows you to disable
the Brown Out Detector (BOD) before going to sleep, thereby reducing
power even further.
- The note about signbit() implementation is removed from documenatation.
The reason is that the GCC can replace it with inline code and the
nonzero value is unpredictable in such case.
- Signature API added in <avr/signature.h>.
- All functions are now placed in the .text.avr-libc section, and the
floating point functions are placed in the .text.avr-libc.fplib section. This
allows the user the ability to relocate all avr-libc routines to a different
address using a custom linker script.
- The port/pin assignments of the HD44780 LCD controller in the
stdiodemo example can now be distributed across more than a single
AVR port. The only remaining requirement is that all data bits
are assigned to a single port in ascending order.
- Added support for avrtiny10 architecture, to support the ATtiny10 Family.
- Added new headerfile: <avr/cpufunc.h>; currently contains _NOP() and
_MemoryBarrier().
- The twidemo can now optionally address 24C32 and larger EEPROMs
that require 16-bit word addressing.
- Add a "memory barrier" to the cli() and sei() macros.
* New devices supported:
+ ATxmega64D3
+ ATxmega128D3
+ ATxmega256D3
+ ATxmega192A3
+ ATxmega128A1
+ ATxmega64A1
+ ATmega32M1
+ ATmega32C1
+ ATmega32U4
+ ATtiny167
+ ATtiny13A
+ ATmega32U6
+ AT90SCR100
+ ATtiny87
+ ATxmega32A4
+ ATmega16M1
+ ATmega64C1
+ ATmega64M1
+ ATA6289
+ AT90PWM81
+ ATmega128RFA1
+ ATxmega32D4
+ ATxmega16A4
+ ATxmega16D4
+ ATmega16U4
+ ATmega8U2
+ ATmega16U2
+ ATmega32U2
+ ATxmega192D3
+ ATtiny2313A
+ ATtiny4313
+ ATtiny24A
+ ATtiny44A
+ ATtiny261A
+ ATtiny461A
+ ATtiny861A
+ ATmega644PA
+ ATmega88PA
+ ATmega16A
+ ATmega64HVE
+ ATmega169PA
+ ATmega649P
+ ATmega324PA
+ ATmega16HVA2
+ ATmega16HVB
+ ATmega48A
+ ATmega88A
+ ATmega168A
+ ATmega328
+ ATmega164A
+ ATmega324A
+ ATmega644A
+ ATmega165A
+ ATmega169A
+ ATmega645A
+ ATmega6450A
+ ATmega649A
+ ATmega6490A
+ ATmega6490P
+ ATmega645P
+ ATmega6450P
+ ATmega329PA
+ ATxmega128A1U
+ ATxmega64A1U
+ ATtiny4
+ ATtiny5
+ ATtiny9
+ ATtiny10
+ ATtiny20
+ ATtiny40
+ ATtiny84A
+ ATmega325A
+ ATmega3250A
+ ATmega329A
+ ATmega3290A
+ M3000
* Optimized functions:
eeprom_read_block
eeprom_read_dword
eeprom_read_word
eeprom_write_block
eeprom_write_dword
eeprom_write_word
strtod
setjmp
sqrt (and callers: acos, asin and hypot)
sin, cos, tan: minor in space
strlcat, strlcat_P
strlcpy, strlcpy_P
strtok, strtok_r
* Contributed Patches:
[#6194] Twitest updated to handle larger EEPROM devices
[#6352] Far pointer library
[#6500] Reentrant code faq
[#6517] Pgmspace with float support
[#6555] malloc improvement
[#6649] sqrt.S in libm changes
[#6690] Shorten calculation of dallas 1-wire crc
[#6718] Optimize the EEPROM functions
[#6720] FAQ update. Add EEPROM section, baud rate section. Correct spelling.
[#6791] Minor fixes to stdio.h documentation
[#6878] eewr_byte.S update for patch #6718
[#6891] Add XMega software reset to the FAQ section on software reset
[#6895] Improved malloc behaviour when expanding used area
[#6897] Allow <util/setbaud.h> to be used with assembler source
* New functions:
cbrt
eeprom_read_dword
eeprom_read_float
eeprom_update_block
eeprom_update_byte
eeprom_update_dword
eeprom_update_float
eeprom_update_word
eeprom_write_dword
eeprom_write_float
memccpy_P
strdup
strtok
strtok_P
strtok_rP
strlen_PF
strnlen_PF
memcpy_PF
strcpy_PF
strncpy_PF
strcat_PF
strlcat_PF
strncat_PF
strcmp_PF
strncmp_PF
strcasecmp_PF
strncasecmp_PF
strstr_PF
strlcpy_PF
memcmp_PF
*** Changes in AVR-LibC-1.6.0:
* Main changes from avr-libc 1.4 to 1.6:
+ The fplib/math library is completely rewritten. Now features of the IEEE
754 standard are supported all: negative zero, subnormals, Infs and NaNs.
It concerns both to base operations (arithmetic, comparison...), and to
all functions. Speed of performance is increased, sometimes considerably.
A number of mistakes (not reflected in the Bugs) which led severe losses
of accuracy for some arguments is corrected. A number of new functions is
added. It is necessary to note, that the new library concedes old under
the charge of flash memory a little.
Incompatibilities:
- Conversion from float to long (make similar to GCC/x86): in case if
overflow was or if input is NaN return 0x80000000 for signed result and
return 0 for unsigned result. Negative input (not too big in absolute
value) is permissible for cast to unsigned long, for example: (unsigned
long)(-1.0) returns ULONG_MAX.
- The signbit() function: return 1 as nonzero value (make similar to
builtin GCC).
- Make frexp() similar to GCC/x86 in case of nonfinite arg: write 0 by
exponent pointer. Early Avr-libc's frexp() skips exponent storing in this
case. Make the NULL a legal address to skip a storing.
+ Functions of numbers to ascii conversion are completely rewritten:
dtostre(), dtostrf() and printf() family. They more do not use float point
operations. Speed of int/float to ascii has increased in some times. For
printf() the stack usage is reduced.
+ Test suite is added to the Avr-libc project.
+ A few new util's headers: util/atomic.h, util/setbaud.h .
* Bugs fixed:
[no-id] iscntrl() return true for some values from 0x80 to 0xff.
[no-id] Fix the examples installation for non-doc builds.
[no-id] Fix the spelling of the OCR1A/B registers in ATtinyX4 devices.
[no-id] LED1/2 don't work in the largedemo on an ATmega16.
[no-id] Not defined SPM_PAGESIZE for ATtinyX4/X5/X61 and ATtiny2313 devices.
[no-id] Typo in iomxx0_1.h: PRUSART3.
[no-id] Make include/avr/sfr_defs.h -Wundef safe.
[no-id] Make include/avr/eeprom.h -Wundef safe.
[no-id] Fix the timing of the HD44780 driver in the stdiodemo.
[no-id] Fix the sleep mode definitions for the ATtiny2313.
[no-id] Exclude 64-bit types for -mint8.
[no-id] Make documentation build work with doxygen 1.5.x
[#1929] -Inf not detected
[#11511] NaN not generated correctly by division library
[#11820] dtostre: wrong output with percision =3
[#13330] NaN is recognized not always
[#15161] util/delay.h misses inline keyword (regression)
[#15193] incorrect definition of IVSEL bit in MCUCR register
[#15266] Function ldexp incorrectly processes overflow and underflow cases.
[#15494] Compile warning and errors if compiler flag -Wundef flag specified
[#15512] Bootloader macros not interrupt safe.
[#15519] AT90CAN* processors incorrectly identified as "AT90S family"
[#15522] Typo in iotn2313.h vector table
[#15559] Wrong macro for boot_page_write(address) and ATmega128
[#15574] unneeded compatibility break
[#15595] GPIOR0 misspelled for ATtiny25/45/85
[#15732] interrupt.h: ISR() incompatibility with gcc 3.4.5
[#15890] missing /devtools/gen-avr-lib-tree.sh
[#16039] Names in Pxy (i.e. PA0) style of ports pins for some devices are
not defined.
[#16125] HD44780 data bit assignment restrictive
[#16260] _crc16_update lacks C equivalent
[#16411] Add the 'used' attribute to all interrupt service routine macros.
[#16434] EMPTY_INTERRUPT has no misspelled vector checking
[#16441] eeprom.h should use __asm__
[#16868] depricated.h: outp() arguments order misprint
[#17068] wdt.h file: __AVR_ATmeg324P__ spelling mistake
[#17470] Add API for CLKPR register.
[#17551] Update documentation to point to issues with gcc4.1
[#17591] /avr-libc/libm/fplib/fp_split.S error return will fail for
3-Byte PC devices
[#17608] Add ISR_ALIAS() to avr/interrupt.h
[#18115] online documentation typo/bug avr/boot.h
[#18373] Bugs in Inline ASM documentacion
[#18385] SPM_PAGESIZE wrong value for ATmega164p and ATmega324p
[#18509] strtod.S crashes due to stack problem with atmega 2560
[#18662] rand() keeps returning the same value if seeded with 0
[#18686] AT90USB**** devices are absent in interrupt-verctor-names table