Add ATmega32U4-compatible Arduino as ISP programmer #56

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Merged

facchinm merged 2 commits into arduino:master from per1234:arduino-as-isp-atmega32u4-programmer

Dec 19, 2018

Merged

Add ATmega32U4-compatible Arduino as ISP programmer #56

facchinm merged 2 commits into arduino:master from per1234:arduino-as-isp-atmega32u4-programmer

Dec 19, 2018

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@per1234 per1234 commented Dec 19, 2018

Use of the stk500v1 protocol for Arduino as ISP does not work with native USB boards on Windows. The arduino protocol does (see arduino/Arduino#1182 (comment)).

However, the arduino protocol makes it more likely that boards with an external USB interface chip will require the auto-reset circuitry to be disabled to allow them to be used as Arduino as ISP. That adds extra complexity to a process already difficult for the average Arduino user.

For this reason, this pull request does the following:

Revert the previous commit changing the Arduino as ISP programmer to use the arduino protocol. This restores the Arduino as ISP programmer to maximum compatibility with boards using an external USB interface.
Add a new programmer using the arduino protocol specifically for using native USB boards as Arduino as ISP.

I'm not sure what the most appropriate name for the new programmer is. I went with "Arduino as ISP (ATmega32U4)" and the ID arduinoasispatmega32u4 but I'm happy to modify this PR if something else is preferred.

Approved at arduino/Arduino#8032 (comment)

Fixes ArduinoISP on the Leonardo does not work on windows Arduino#1182 (though note some more advanced fixes are also discussed in that thread)
Fixes Arduino nightly 2018年09月20日 02:27 : "ArduinoAsISP" upload fail Arduino#8032

per1234 added 2 commits

December 19, 2018 01:12

@per1234


 Revert "Updated Arduino as ISP setting"

a901b08

This reverts commit b084848.

@per1234


 Add ATmega32U4-compatible Arduino as ISP programmer

98c8a13

Use of the stk500v1 protocol for Arduino as ISP does not work with native USB boards on Windows. The arduino protocol does.
However, the arduino protocol makes it more likely that boards with an external USB interface chip will require the auto-reset circuitry to be disabled to allow them to be used as Arduino as ISP. That adds extra complexity to a process already difficult for the average Arduino user.
For this reason, a new programmer using the arduino protocol is added specifically for using native USB boards as Arduino as ISP and the previous Arduino as ISP configuration is retained for use with all other boards.