Obijuan:Notas sobre AVR

Goal: learn more about the AVR core. Learn how to program in assembler. Implement an AVR core for the lattice FPGAs

some links to process:

• http://electronics.stackexchange.com/questions/32130/documentation-on-avr-as
• http://www.nongnu.org/avr-libc/
• AVR instruction set: http://www.atmel.com/images/atmel-0856-avr-instruction-set-manual.pdf
• https://en.wikipedia.org/wiki/Atmel_AVR_instruction_set
• http://www.avr-tutorials.com/

• Leer: http://www.avrfreaks.net/forum/looking-avr-gcc-asm-example-or-tutorial-linux

• Más información sobre prog. en assembler: http://www.nongnu.org/avr-libc/user-manual/assembler.html
• http://www.atmel.com/webdoc/AVRLibcReferenceManual/assembler_1ass_example.html

Ejemplo hola mundo

Codigo:

; This is an AVR assembly code

 .org 0x00
 
end:
 rjmp end 

Para ensamblar:

$ avr-as test.asm -o test.out

Para generar el .hex:

$ avr-objcopy -j .text -j .data -O ihex test.out test.hex