AVR WinAVR and avr-gcc Tutorial
using
Free C-Compiler WinAVR based on gnu-gcc (avr-gcc)

1. Download and installation instructions for WinAVR

2. Special installation notes for WinAVR as free C-Compiler for AVR ATmega2560 / ATmega2561

3. WinAVR C example program, source code available, for
   ATmega128, ATmega1281, ATmega1280

4. WinAVR C example program, source code available, for ATmega2560, ATmega2561

5. ISP-programming instructions for code upload to flash of AVR device using avrdude

6. Special notes for ISP-programming of ATmega2560 / ATmega2561 using avrdude

1. Download and installation instructions for WinAVR

   Download WinAVR (here Version WinAVR-20060125) from WinAVR-sourceforge and install program.

    

2. Special installation notes for WinAVR as free C-Compiler for AVR ATmega2560 / ATmega2561

   ATmega2560 and ATmega2561 are by now not supported in Version 20060125 of WinAVR.
   You need to install a patch to compile source code for ATmega2560 and ATmega2561 devices.
   Download patch (GCC4.1-WINAVR) for WinAVR 20060125.
   Extract the file into your WinAVR installation directory.
    

3. WinAVR C example program, source code available, for
   ATmega128, ATmega1281, ATmega1280

   The following source code in ATmega256x_demo.zip includes a modified version of the WinAVR example demo.c for ATmega128, ATmega1281, ATmega1280.
    

4. WinAVR C example program, source code available, for ATmega2560, ATmega2561

   The following source code in ATmega256x_demo.zip includes a modified version of the WinAVR example demo.c for ATmega2560 and ATmega2561.

   The following lines in red have been added to "iocompat.h".

   #elif defined(__AVR_ATmega64__) || defined(__AVR_ATmega128__) || \
   defined(__AVR_ATmega165__) || defined(__AVR_ATmega169__) || \
   defined(__AVR_ATmega325__) || defined(__AVR_ATmega3250__) || \
   defined(__AVR_ATmega645__) || defined(__AVR_ATmega6450__) || \
   defined(__AVR_ATmega329__) || defined(__AVR_ATmega3290__) || \
   defined(__AVR_ATmega649__) || defined(__AVR_ATmega6490__) || \
   defined(__AVR_ATmega640__) || \
   defined(__AVR_ATmega1280__) || defined(__AVR_ATmega1281__) || \
   defined(__AVR_ATmega2560__) || defined(__AVR_ATmega2561__)

   The "makefile" have been adopted:
   #MCU_TARGET = atmega1280
   #MCU_TARGET = atmega1281
   MCU_TARGET = atmega2560
   #MCU_TARGET = atmega2561

   
   For compiling use "make".

   C:\WinAVR\examples\ATmega256xdemo>make clean
   rm -rf *.o demo.elf *.eps *.png *.pdf *.bak
   rm -rf *.lst *.map *.hex *.bin *.srec
   
   C:\WinAVR\examples\ATmega256xdemo>make
   avr-gcc -g -Wall -O2 -mmcu=atmega2560 -c -o demo.o demo.c
   avr-gcc -g -Wall -O2 -mmcu=atmega2560 -Wl,-Map,demo.map -o demo.elf demo.o
   avr-objdump -h -S demo.elf > demo.lst
   avr-objcopy -j .text -j .data -O ihex demo.elf demo.hex
   avr-objcopy -j .text -j .data -O binary demo.elf demo.bin
   avr-objcopy -j .text -j .data -O srec demo.elf demo.srec
   avr-objcopy -j .eeprom --change-section-lma .eeprom=0 -O ihex demo.elf demo_eeprom.hex
   avr-objcopy -j .eeprom --change-section-lma .eeprom=0 -O binary demo.elf demo_eeprom.bin
   avr-objcopy -j .eeprom --change-section-lma .eeprom=0 -O srec demo.elf demo_eeprom.srec

    

5. ISP-programming instructions for code upload to flash of AVR device using avrdude

   In this tutorial avrdude is used the program the flash of the ATmega device:

   Note: You now have to use "flashfile.bin" instead of "flashfile.hex" unlike in prior versions (4.x).
   
   avrdude: Version 5.1
   
   >avrdude -p atmega128 -c stk200 -P lpt1 -U flash:w:demo.bin:r
   
   avrdude: AVR device initialized and ready to accept instructions
   
   Reading | ################################################## | 100% 0.01s
   
   avrdude: Device signature = 0x1e9702
   avrdude: NOTE: FLASH memory has been specified, an erase cycle will be performed
   To disable this feature, specify the -D option.
   avrdude: erasing chip
   avrdude: reading input file "demo.bin"
   avrdude: writing flash (12058 bytes):
   
   Writing | ################################################## | 100% 8.07s
   
   avrdude: 12058 bytes of flash written
   avrdude: verifying flash memory against demo.bin:
   avrdude: load data flash data from input file demo.bin:
   avrdude: input file demo.bin contains 12058 bytes
   avrdude: reading on-chip flash data:
   
   Reading | ################################################## | 100% 7.81s
   
   avrdude: verifying ...
   avrdude: 12058 bytes of flash verified
   
   avrdude: safemode: Fuses OK
   
   avrdude done. Thank you.

   
    

6. Special notes for ISP-programming of ATmega2560 / ATmega2561, i.e. upload code to flash, using avrdude

   Because AVR ATmega2560 and ATmega2561 devices are not supported by avrdude by now (Version WinAVR-20060125) use ATmega1280 mode instead:

   C:\WinAVR\examples\ATmega256xdemo>avrdude -p atmega1280 -c stk200 -P lpt1 -U flash:w:demo.bin:r
   
   avrdude: AVR device initialized and ready to accept instructions
   
   Reading | ################################################## | 100% 0.00s
   
   avrdude: Device signature = 0x1e9801
   avrdude: NOTE: FLASH memory has been specified, an erase cycle will be performed
   
   To disable this feature, specify the -D option.
   avrdude: erasing chip
   avrdude: reading input file "demo.bin"
   avrdude: writing flash (486 bytes):
   
   Writing | ################################################## | 100% 0.17s
   
   avrdude: 486 bytes of flash written
   avrdude: verifying flash memory against demo.bin:
   avrdude: load data flash data from input file demo.bin:
   avrdude: input file demo.bin contains 486 bytes
   avrdude: reading on-chip flash data:
   
   Reading | ################################################## | 100% 0.16s
   
   avrdude: verifying ...
   avrdude: 486 bytes of flash verified
   
   avrdude: safemode: Fuses OK
   
   avrdude done. Thank you.

    

[SIPHEC home]