On Friday 22 July 2005 18:38, Nigel Winterbottom wrote:
> The Attachment was missing (me being a buffoon). Now Added.
...
Thanks, the code is good optimized.
Notes:
You use short commands (rcall/rjmp). Very well, but it is necessary to use
subsections in this case (look, for example, libm or ctype.S).
I am not assured of necessity to do functions atomic. In that case it is
necessary to rewrite all Avr-libc. But if to agree with such necessity your
realization is unsafe, for example:
.global Rd
Rd:
1: sbic _SFR_IO_ADDR(EECR), EEWE
rjmp 1b ; Make sure EEPR is ready
<< Interrupt with writing to EEPROM>>
in __tmp_reg__, _SFR_IO_ADDR(SREG)
cli
...
Here record of byte in EEPROM will be crashed.
Personally I use functions from Avr-libc in simple cases. In the same place,
where the big volume of record is necessary, I use my own library based on
interruptions.
Regards.
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