Differences

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--- avr:usage [2013/09/18 12:56] – sdolt
+++ avr:usage [2016/11/09 16:49] (current) – [Liens utiles] sbolay
@@ Line 32: / Line 32: @@
 |Atmel JTAGICE mkII mode ISP|jtag2isp|
 |Atmel JTAGE ICE mkII mode DebugWire|jtage2dw|
+|Atmel AVR ISP mkII|avrisp2|
 |Autre|Voir [[http://www.nongnu.org/avrdude/user-manual/avrdude_4.html|le manuel]]|
@@ Line 37: / Line 38: @@
 <code.bash>
 avr-gcc -mmcu=attiny85 -o main.elf main.c
-objcopy -O ihex -R .eeprom main.elf main.hex
+avr-objcopy -O ihex -R .eeprom main.elf main.hex
 avrdude -p t85 -c stk500 -P /dev/ttyUSB0 -U flash:w:main.hex
@@ Line 137: / Line 138: @@
 ^Description^Liens^
 |Calculateur de fusible|[[http://www.engbedded.com/fusecalc/]]|
+|Comprendre les registres d'entrée/sortie|[[http://iamsuhasm.wordpress.com/tutsproj/avr-gcc-tutorial/]]|
+|AVR-GCC for OSX|[[https://obdev.at/products/crosspack/download.html]]|
+===== FAQ =====
+see error  "multiple definition of `_floatsisf'"
+look especially to the position of the **-lm** flag
+<code bash>
+$ avr-gcc -mmcu=attiny85 -o main.elf main.c
+/usr/local/CrossPack-AVR-20130212/lib/gcc/avr/4.6.2/../../../../avr/lib/avr25/libc.a(floatsisf.o):../../../libm/fplib/floatsisf.S:46: multiple definition of `__floatsisf'
+/usr/local/CrossPack-AVR-20130212/lib/gcc/avr/4.6.2/avr25/libgcc.a(_si_to_sf.o):/Users/cs/Developer/Repos/Microcontroller/CrossPack-AVR/compile/avr-gcc-4.6.2/build-objects/avr/avr25/libgcc/../../.././gcc/fp-bit.c:1336: first defined here
+collect2: ld returned 1 exit status
+$ avr-gcc -mmcu=attiny85 -lm -o main.elf main.c
+/usr/local/CrossPack-AVR-20130212/lib/gcc/avr/4.6.2/../../../../avr/lib/avr25/libc.a(floatsisf.o):../../../libm/fplib/floatsisf.S:46: multiple definition of `__floatsisf'
+/usr/local/CrossPack-AVR-20130212/lib/gcc/avr/4.6.2/avr25/libgcc.a(_si_to_sf.o):/Users/cs/Developer/Repos/Microcontroller/CrossPack-AVR/compile/avr-gcc-4.6.2/build-objects/avr/avr25/libgcc/../../.././gcc/fp-bit.c:1336: first defined here
+collect2: ld returned 1 exit status
+$ avr-gcc -mmcu=attiny85 -o main.elf main.c -lm
+$
+</code>