ICCAVR 6.23版本正式发布RTOS已作为系统库提供
ICCAVR Readme file
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update announcements. Send "subscribe icc-avr" in the SUBJECT to
minimalist@imagecraft.com.
UCOS/II ICCAVR is now available. Look at \icc\examples.avr\ucos2_iccavr.zip
Outstanding Bug List (we are working on resolving it):
- printf %f ignores field width specifier, but does honor precision
- source files residing in remote NT network drives may cause spurious illega
charcaters \0 errors when compiling.
- do NOT declare CONST local array or structure. The generated code is
incorrect. static const "local" is fine, as is global const. e.g.
foo() { const char a[] = { 1, 2, 3 }; // generates bad code
foo() { static const char a[] = ... //ok
const char a[] = ... // outside function, OK
CHANGE LOGS
09/05/01 - V6.23
Code for Atmel Appnote 109 (Self-Programming) has been ported to ICCAVR.
See \icc\examples.avr\appnote109\.
Compiler
- small enums can now be char type.
- function returning char type is no longer extended to 16 bit.
- Lots of peephole improvements. Should see 1%-5% better code:
. Z flag tracking
. repeated register history and peepholing
. sbr? optimizations for word vars, and branch flipping
. call/ret ==> jmp
. more temp register elimination --> less register moves
. ([int/byte] << 8) | (ubyte) generates better code, also + operator.
- Two rare case lifetime analysis bugs were fixed - 1) nested loops with
a variable defined only in the inner loop but is used in the outer
loop got incorrect lifetime, 2) nested loops need the backedges
normalized.
- A rare case of register spilling:
if (<spilled reg> relop <const data>) ...
the spilled registers used R0 which trashed the result of the lpm
- explicit cast of unsigned int to unsigned long than << 16 bit
was generating incorrect code: l = (unsigned long)ui << 16;
Code Compressor
- added nop squashing after CALLs are turned into RCALLs
Library
- scanf %d sometimes converts the number iincorrectly
Listing File
- listing was incorrectly for addresses > 64K bytes
http://www.imagecraft.com/software/demos.html
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