Error while uploading hex file to AVR uC

Question

I am trying to upload a hex file to an ATtiny85 from Ubuntu by running these commands:

avr-gcc -mmcu=attiny85 -Wall -Os -o src.elf main.cpp
avr-objcopy -j .text -j .data -O ihex src.elf src.hex
avrdude -p t85 -c avrispmkII -e -U flash:w:src.hex

I get this error:

avrdude: ser_open(): can't set attributes for device "/dev/ttyS0": Inappropriate ioctl for device

I tried to use different USB ports, but that didn't help. How can I resolve this issue?

Answer 1

A short write-up from chat.

First make sure the driver module is loaded, apparently this does not happen automatically:

Option 1: On the fly: modprobe cdc-acm

Option 2: To load the module at boot time:

• sudo bash -c 'echo hoi >> /etc/modules Notice the double >> is important.
• reboot
• check if the module is loaded: lsmod | grep cdc-acm && echo success || echo failed

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You should be able to program the device using:

sudo avrdude -v -p t85 -c avrispmkII -P usb -U flash:w:src.hex

Check this question for more information: https://stackoverflow.com/questions/5412727/avrisp-mkii-doesnt-work-with-avrdude-in-linux

Not sure what the reason is for the error message you reported at this point:

avrdude: stk500v2_command(): command failed
avrdude: stk500v2_program_enable(): bad AVRISPmkII connection status: Target not detected
avrdude: initialization failed, rc=-1 

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Your to do list:

1. Automatically load the cdc-acm module => Described above.
2. Figure out what is wrong with your udev rules, so you do not have to use sudo for programming => check https://askubuntu.com/ for that.
3. Figure out why the programmer doesn't respond. https://electronics.stackexchange.com/ is the right place. A picture of your setup will help. As it is a different error than you started with, I think a new question is justified.