Hello, I've been trying to program an Atmega 1281 on a custom circuit board. I've been using an Uno with Arduino ISP firmware installed, but have hit a bit of a snag. When I try to bootload the 1281 I get random invalid device signatures. Such as 0x070000, 0xff0000, and 0x80001e; see the verbose o…

Uno as ISP for Atmega 1281

pert November 28, 2017, 1:47am 11

Just ignore that. It's the expected behavior and doesn't indicate any problem.

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