On Fri, 9 Dec 2005 14:49, Larry Barello wrote: > Which version of the compiler are you using? I find it hard to believe > that something this fundamental (a static array of five chars) would go > unnoticed until now.
Yeah, me too :) The .lst file shows buffer and abc are in the data section.. The data section ends up in SRAM, right? > I took your test case, stripped it down and it appears that GCC does the > right thing: Because the data is initialized it sticks the struct onto the > stack then initializes the values. > > The version of GCC I am using is 3.4.3 (WinAvr) [inchoate 15:11] ~ >avr-gcc -v Reading specs from /usr/local/lib/gcc/avr/3.4.4/specs Configured with: ./configure --target=avr --disable-nls --prefix=/usr/local i386-portbld-freebsd7.0 Thread model: single gcc version 3.4.4 > Are you using some hacked version of the C runtime, or startup that isn't > initializing the SRAM data? Or is it possible you application is > 64k and > the initialized data segment is beyond the reach of the LPM command (IIRC > gcc can't access data > 64k, although the code can go that high) If you take my testcase.c file and do.. avr-gcc -O2 -fno-strict-aliasing -pipe -g -Wall -Wunreachable-code -DF_CPU=16000000 -mmcu=atmega32 -Wa,-adhlmsn=testcase.lst -c testcase.c -o testcase.o avr-gcc -O2 -fno-strict-aliasing -pipe -g -Wall -Wunreachable-code -DF_CPU=16000000 -mmcu=atmega32 -Wl,-Map=testcase.map,--cref -g testcase.o -o testcase.elf avr-objcopy -j .text -O ihex testcase.elf testcase.hex avr-objdump -S testcase.elf > testcase.dmp You will get the code I am shoving into my micro, which I do with.. avrdude -U flash:w:testcase.hex -p m32 -c alf -E vcc,noreset -q -- Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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