Arduino nightly 2018/09/20 02:27 : "ArduinoAsISP" upload fail

[pierre83]

Uploading a barebone ATMEga328P with a NANO (my case) is impossible because in the file programmers.txt the following lines seems to be wrong:

arduinoasisp.protocol=arduino

and:

arduinoasisp.program.protocol=arduino

They should be:

arduinoasisp.protocol=stk500v1

and

arduinoasisp.program.protocol=stk500v1

When uploading, the symptom is:

         Using Port                    : COM4
         Using Programmer              : arduino
         Overriding Baud Rate          : 19200
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x15
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x15

and further:

avrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0x14

[per1234]

Have you checked whether the problem is resolved by changing the programmer definition back to using the stk500v1 protocol?

Related commit: arduino/ArduinoCore-avr@b084848

[pierre83]

Yes, the problem is resolved by changing these 2 lines from Arduino to stk500v1

[per1234]

Here's the PR where the protocol was changed, which has a lot of information on the reason for doing so: #3687
I had some trouble finding it because the PR is still open, but the commit from the PR was pulled into Arduino AVR Boards.

There is another report of this causing a problem here:
http://forum.arduino.cc/index.php?topic=569766.msg3895180#msg3895180

[per1234]

This issue has come up multiple times on the forum since the release of Arduino AVR Boards 1.6.22. I wonder if it wouldn't be better to revert arduino/ArduinoCore-avr@b084848 and add a new "Arduino as ISP (ATmega32U4)" programmer that uses the arduino protocol? Anyone have thoughts on that?

I made a 3rd party hardware package to add such a programmer years ago and have kept an eye out for people having trouble using ATmega32U4-based boards for Arduino as ISP ever since. That issue has rarely come up. So it seems to me that arduino/ArduinoCore-avr@b084848 is causing more trouble than it solves. I do like that it expands support for Arduino as ISP.

[facchinm]

@per1234 totally agree, I'm taking care of it.

[facchinm]

@per1234 I totally approve your solution, reverting to stk500v1 protocol for all boards except 32u4 and creating another "programmer" with arduino protocol. Would you mind filing a PR to https://github.com/arduino/ArduinoCore-avr/ ? Thanks you so much for your invaluable contribution!