Useful avrdude commands

Avrdude is a command line tool for uploading to and downloading from AVR microcontrollers. It is used in the background by Arduino to upload sketches.

It’s also the tool we used to upload the bootloader to all of the atmega644p chips provided in the TVRRUG OMC electronics kits.

Here are some useful commands when using avrdude.

Don’t forget to plug in your ISP (in my case a USBtiny) and check ¬†drivers are installed (if required).

USBTiny ISP drivers –¬†https://learn.adafruit.com/usbtinyisp/drivers

Check avrdude version

$ avrdude

See list of compatible programmers

$ avrdude -c ?

USBtiny programmer name:

usbtiny

Test your setup

e.g. using a USBtiny to program an atmega644

$ avrdude -c usbtiny -p m644

Successful test result:

avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.02s
avrdude: Device signature = 0x1e9609
avrdude: current erase-rewrite cycle count is -44032 (if being tracked)
avrdude: safemode: Fuses OK
avrdude done. Thank you.

If you receive “Operation not permitted” error messages, you need to run the commands as root e.g. using sudo in Ubuntu.

Upload the TVRRUG bootloader and set fuses

$ avrdude -c usbtiny -B 2.4 -p atmega644 -U hfuse:w:0xd4:m -U lfuse:w:0xe7:m -U flash:w:bootloader-644-20MHz_0.hex

Successful upload:

avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.02s
avrdude: Device signature = 0x1e9609
avrdude: NOTE: FLASH memory has been specified, an erase cycle will be performe
To disable this feature, specify the -D option.
avrdude: current erase-rewrite cycle count is -44032 (if being tracked)
avrdude: erasing chip
avrdude: reading input file "0xd4"
avrdude: writing hfuse (1 bytes):
Writing | ################################################## | 100% 0.00s
avrdude: 1 bytes of hfuse written
avrdude: verifying hfuse memory against 0xd4:
avrdude: load data hfuse data from input file 0xd4:
avrdude: input file 0xd4 contains 1 bytes
avrdude: reading on-chip hfuse data:
Reading | ################################################## | 100% 0.00s
avrdude: verifying ...
avrdude: 1 bytes of hfuse verified
avrdude: reading input file "0xe7"
avrdude: writing lfuse (1 bytes):
Writing | ################################################## | 100% 0.00s
avrdude: 1 bytes of lfuse written
avrdude: verifying lfuse memory against 0xe7:
avrdude: load data lfuse data from input file 0xe7:
avrdude: input file 0xe7 contains 1 bytes
avrdude: reading on-chip lfuse data:
Reading | ################################################## | 100% 0.00s
avrdude: verifying ...
avrdude: 1 bytes of lfuse verified
avrdude: reading input file "bootloader-644-20MHz_0.hex"
avrdude: input file bootloader-644-20MHz_0.hex auto detected as Intel Hex
avrdude: writing flash (64646 bytes):
Writing | ################################################## | 100% 19.88s
avrdude: 64646 bytes of flash written
avrdude: verifying flash memory against bootloader-644-20MHz_0.hex:
avrdude: load data flash data from input file bootloader-644-20MHz_0.hex:
avrdude: input file bootloader-644-20MHz_0.hex auto detected as Intel Hex
avrdude: input file bootloader-644-20MHz_0.hex contains 64646 bytes
avrdude: reading on-chip flash data:
Reading | ################################################## | 100% 17.78s
avrdude: verifying ...
avrdude: 64646 bytes of flash verified
avrdude: safemode: Fuses OK
avrdude done. Thank you.

Additional sources of information:

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