How to generate hex file using avr-gcc commands

[Shashank Rao.C]

hello,

           I have written a coding for some project. I have compiled in avr-gcc commands for ATmega16. Till here its ok.. no error nothing…

from here i don’t knw how to continue and how to create .hex file and all…

please any one tell me….

[Shashank Rao.C]

hi,

       at last i got how to generate .hex file and programing process in avr dude.

just follow these steps.

 

open a terminal and navigate to where the code is downloaded too. then run the following commands:

 

1.) avr-gcc -g -Os -mmcu=<mcu type> -c file_name.c

this produces an object file called flash.o which then needs to be linked using:

2.) avr-gcc -g -mmcu=<mcu type> -o file_name.elf file_name.o
this has now produced a binary file called flash.elf, which is a GNU executable file. we gotta mess with it a bit more and grab some bits out of it to make the hex file

3.) avr-objcopy -j .text -j .data -O ihex file_name.elf file_name.hex

 

Note:mcu type can be ATmega8,ATmega16,ATmega328 etc in code written as
atmega8,atmega16 etc.

In the home folder you wull get your .hex file

 

Now programing to ic using avr-dude

 

follow these step

 

4.)avrdude -p <microcontroller> -P /dev/ttyACM0 -c stk500v2 -u -U flash:w:filename.hex

 

Microcontroller can be ATmega8,ATmega16,ATmega32,ATmega328, etc..

and is written in code as atmega8,atmega16,atmega32,etc..

 

 

Note: I checked this only in ISP programmer. also this only for avrdude.

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