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Text File | 1999-03-23 | 13.8 KB | 443 lines

AVA CHANGES Uros Platise (c) 1998,1999 Special thanks to Denis Chertykov. 0.1.3 -> 0.1.4 (8. Januar, 1999) ================================ * keyword: ds.X is now fixed: storage size can now also be given as a set macros * public/common symbols are added Public macro can now be defined multiple times only and only if they completely match. An example of usage: #define public __AVR_WRAP_AROUND The symbol __AVR_WRAP_AROUND must be put into the object file otherwise linker will never get it. Usually if more than one source has defined a public sym, ava produces error; but in this case not. Because __AVR_WRAP_AROUND is defined with the same macro "1". * wrap around option added (already included in arch.inc) macro: __AVR_WRAP_AROUND * BUG FIX: Remarks starting with ; can be now written as: #define test;remark, remark, remark * BUG FIX: extern virtual symbols now work and also public references cross files are now fixed. 0.1.4 -> 0.1.5 (9. Januar, 1999) ================================ * BUG FIX: "dc.w -1" produced wrong output: "ffffffff" instead "ffff" * System macros, can now be declared before arch.inc is loaded. Example: #define __X1 /* system macros should start with */ #define __X2 /* two underlines "__" */ Usage: to redefine segment length as __ERAM_SIZE #define AT90S8515 /* at this point, arch.inc is included */ * BUG FIX: ava is now "friendly" compiled with egcs++ compiler * Expressions are now added to #ifdef statements. For example: #ifdef A | B ... #endif All symbols that are not defined at the #ifdef statement, are taken as zeros. * Expression parser is now extended to the following operations: a>b, a<b, a==b, a<=b, a>=b It returns 1 or 0, depending on condition. You can use them anywere where expressions are allowed (including the ifdef statements) Note: to support above feature, character = has moved from CONTROL group to MATH group (since it was not thought to be a part of expressions at early begining). I hope I did not miss something: if you find somewhere a somewhat correct notation (as: seg abs=1 flash) but you get error at '=' character; this is because = has changed its group. (In that case, immediatelly report me an error). The following changes were submitted by Denis: ---------------------------------------------- * FILES are now linked in the same order as listed in the command line * -e option added to disable reports * On return, ava return number of errors (returns zero on success) * BUG FIX: ld rX,Z 0.1.5 -> 0.1.6 (15. Januar, 1999) ================================= * Listing file -L switch is now specifed to the compiler and to the linker any more. To files, which were assembled with -L switch, a listing is generated; other are skipped. (new) * Command line parameters are now given in a little bit different form. Parameters -DLIl should be written as: ava -Dmacro_name -Lasm_source -Iinclude_directory -llog_file Output file remained the same: ava -o out_file * Setting the log file (the -l <log_filename>) multiple times (new) This feature is somehow intented for use with avr-gcc which is by default run with -e option. If user wants to get the segment information, he must declare new log file as: avr-gcc ....... -Xlinker -lava.log * BUG FIX: #ifdef ava -Dmacro generate "Bad format: macro" report in #ifdef statements. * #ifdef <extern_symbol> (new) Now you can test the following case: extern _idle #ifdef _idle rcall _idle #endif This features enhances modular programming. * arch.inc: Protection of the register and io_space (new) All models excluding the AT90S1200 have memory mapped register and io_space. It might happen that user forget to fill or skip that area (from 0 to 0x5F). To avoid this problem, two fixed abs and size segments are declared (see arch.inc for details). * arch.inc: segment: eram.sram (removed) It showed up it is useless. 0.1.6 -> 0.1.6.1 (15. Januar, 1999) =================================== * BUG FIX: #else The following code did not work: #ifdef A #ifdef B clr r0 #else tst r0 #endif #endif It produced code for "tst r0". Every #else in the second or higher stack level returned wrong result. 0.1.6.1 -> 0.1.7 (18. Januar, 1999) =================================== * BUG FIX: expression termination The following example did not work: ldi r16,3+123+2 out PORTB,21 In the case that two or more instructions were in the same line, what is often used in macros, expression yawned an error "Operator is required before out". Now it is fixed and it only yawns that error when expression is not closed as in example: ldi r16,3+(6+2 out PORTB,21 This is malformed expression and operator should be placed between 2 and out token. * BUG FIX: sortRefs() function cycled when Abstract and Non-Abstract types were used within the same sub-segment. * New machanism for output streams is developed (new) * Empty Segments are now given an absolute address (new) This feature allows you to put the segment size in your code. Example: seg flash.list seg flash.list.T seg flash.code dc.w _flash_list_T - _flash_list * Segment Align Option (new) With align option, linker checks the sizes of segments and if they not much with the align size, it extends them. See next item for example. By default align equals 1. If another value is specifed all childs will use the same allignment. If child has specifed its own align size, it must be the same as the parent's one. Unless error is produced. * Mirror Segments (new) You can mirror one segment to another. Only one mirror per segment is possible. Mirror segment must be already declared. Example: seg align=2 flash.data seg abstract mirror=flash.data eram.data All data from eram.data will be copied from eram.data to flash.data This feature is required by GCC. Mirror segment can be declared only once. Otherwise, error will be produced. * For use with Denis avr-gcc, prep program is not needed anymore with new crt1.s 0.1.7 -> 0.1.7.1 (23. Januar, 1999) =================================== * FEATURE FIX: Abstract flag is now forwared cross files to the same segments. An example: Segment declared as: seg abstract eram.test And in other file: seg eram.test Was not abstract anymore, since the other segment did not specify it. * Little (new) and Big Endian (previous format) DC formats Keyword "dc.x" defines constant of length x. Now you may also define the output format of the dc.x keyword. These are: * big endian (0x1234 is translated in its original form) * little endian (0x1234 - bytes are swaped - 0x3412) The user may choose which format he wants to use. Examples: dc.b 23,21,51 /* normal bytes */ dc.w 0x1234 /* little endian, output is 0x3412 */ dc.W 0x1234 /* big endian - output: 0x1234 */ dc.l 0x12345678 /* little end. - output: 0x78563412 */ dc.L 0x12345678 /* big endian - output: 0x12345678 */ This feature was required by the avr-gcc compiler (which requires little endian format) * FEATURE FIX: ParseMacro() add one space between two tokens Space is now added if lxP->stick is false - that means, tokens were seperated in the original source. * FEATURE FIX: Removable Mirror Segments Even removable segment can now be mirror segment. At least one public label must be referenced within the segment and it won't be removed. * Preprocessor Directive: #arch (new) To avoid conflicits with selecting the device, special directive "#arch device_name" was added which does excatly the same as the first non-system define. * FEATURE FIX: Segment Size can now be redefined to bigger one Problem: libgcc and crt1 are compiled with default minimum __ERAM_SIZE values. If users specifes bigger values in target.inc or before #arch directive, linker reported an error. Solution: if two segments have different sizes, bigger one is used. Note: Due to this feature, YOU SHOULD re-assemble crt1.s and libgcc.s files again! * FEATURE FIX: Segment warning "Extending segment for x byte" is moved to info and is not put to the stderr anymore if -l or -e option is specified. * Multiple errors are now reported (new) When assembler catches syntax error, unrolls the line and continues with syntax analyses. 0.1.7.1 -> 0.1.7.2 (24. Januar, 1999) ===================================== * New AVR models are added: AT90S*33, AT90S*34 and AT90S*35 * avr.inc has been extensively changed avr.inc now selectively include Atmel's AVR definition files according to the device selection. It also includes some more macros - see: avalib/avr.inc Atmel's AVR definition files are provided in the "avalib/avr" directory. Note: the user should include "avr.inc" only after the "#arch ..." directive. * Some little changes are done to warning and info reports ... 0.1.7.2 -> 0.2 (7. February, 1999) ================================== * BUG FIX: mul instruction is moved away from the ATmega families * target.inc is now automatically included if -T command line swithc is specified. * ava development directory structure a little bit organised and installation procedures are included within the Makefiles. * some variables were given init values to satisfy c++ compiler when executed with -O option * BUG FIX: AVR_WRAP_AROUND options removed from AT90S4* models. * BUG FIX: #else produced stack error if used out of #ifdef/#endif statement * NEW: new preproc. directive: #if (avr.inc fix) This directive now replaces former #ifdef since version 0.1.5. Because of C compatibility, #ifdef checks for presence of symbol only and #if evaluates expression. Note: avr.inc can be also used by GNU C compiler. You shall get an error message if ifdef is used in wrong way. * NEW: command line option: -p (pipe) The AVA can read input from stdin and output to the stdout unless output file name is specifed. Linker cannot read from stdin but can output to stdout: ava test.o -o stdout This will do. * EXTENDED: macros are now also enabled during PASS2 This extendes the use of macros - they can be defined anywhere in the source. Attributes (extern, virtual) now make effect on macros too. See documentation for help on usage. * NEW: 32 bit CRC Error Detection is added to Object Files ava-0.1.7.2 object files are not compatible with 0.2 * NEW: 32 bit CRC Error Detection is added to uasm output file. The uisp versions 0.1.3 and lower will simply ignore it. * NEW: User's Manual is now available in doc directory. :) 0.2 -> 0.2.1 (18. February, 1999) ================================= * NEW: command line (cmd) option -v (verbose) added and -e "removed" Info messages are now disabled by default. Add -v to enable them. -e option is not removed but does nothing - dummy switch. It will be removed far in the future. * NEW: cmd option -T extended Target Def. File may be specified besides the -T switch as: -Ttargetfile example: -Tpsb.inc (psb = power supply board :)) The key point of this file is that is parsed before the source code. * NEW: cmd option -A added Declare target device as: -Adevice example: -AAT90S1200 Might be useful for different kind of testing. * EXTENDED: switch -I extended to files If additional file needs to be included temporarly to a source use the following syntax: -Ifilename The file 'filename' will be search in the current directories and those on the search list specified by: -Idirname option. The order of the -I switch in the command line does only effect on the order these include files are included. Source is processed last. The target file is always included before include files. * NEW: preprocessor directive: #error Produces error and prints string followed by the #error directive. Example1: #ifndef __AGE # error "Macro __AGE is not defined." #endif Example2: #if A==2 # error A #endif * NEW: preprocessor directive: #print Prints text numbers and macros ... Example: #print "A equals: " A * EXTENDED: To AVA User's Manual examples are added. (and of course, new switches are also documented). * BUG FIX (avr.inc): macro mmio was disabled and not enabled if RAM (SRAM or and ERAM) was present. * EXTENDED: Macro parameters may be split into several lines. Example1: #define macro_xxx_yyy( long_parameter_1, /* comment 1 */ long_parameter_2 /* comment 2 */ ) \ function 0.2.1 -> 0.2.2 (19. February, 1999) =================================== * BUG FIX: Segment Fitter Serious problem with absolute segments is fixed. 0.2.2 -> 0.2.3 (2. March, 1999) =============================== * NEW: command line option --help added Does the same as -h; needed by the GNU C compiler 0.2.3 -> 0.2.4 (12. March, 1999) ================================ * NEW: AVR-CORE Bug Checking Mechanism Special flag -favr_noskipbug is provided to disable the checking mechanism. See ava User's Manual for details of this bug. * NEW: -f option to declare public macros via the command line 0.2.4 -> 0.2.5 (23. March, 1999) ================================ * BUG FIX: Segment tmp variable was not cleared in the function parse() (Thanks to Nicolas Graffet who has found that strange behaviour.) * NEW: Out of space report now informs the status of the size of required bytes per segment and available bytes per segment.