avrdude: initialization failed, rc=-1

USB AVR Programmer and SPI interface. Adafruit's USBtinyISP.

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cykey
 
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avrdude: initialization failed, rc=-1

Post by cykey »

Hi!

(I am using a genuine USBtinyISP board that I bought on adafruit.com)

I just finished soldering my USBTinyISP board and I tried to simply connect to the ATtiny85 processor with avrdude & the ISP. However, I'm always getting the following error(s): https://ghostbin.com/paste/t4dfu

(I did try to run the command with sudo, but that did not work either.).

Here is a (blurry) picture of my (poor) soldering skills: http://d.pr/i/bbAw However, it seems all fine to me. No pins are touching each other.

My board has the jumpers installed where R4 and R7 should go.

When I run the command, the red LED flashes for a split second, but immediately turns back off.

I have wired the 85 chip (I tried two different ATtiny85 chips, but that did not change a thing) to the USB according to this wiring diagram: http://d.pr/i/Vjo9

Thanks!

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adafruit_support_rick
 
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Re: avrdude: initialization failed, rc=-1

Post by adafruit_support_rick »

Not much I can tell you. I think your USBTiny is OK. The problem is that it's not talking to the ATtiny85. There's something wrong with your connections.
Make sure you're getting 5V between pins 4 and 8 of the ATtiny85. Make sure that RESET is pulled low while it's trying to program the chip. Make sure you've got the right orientation of pins on your ribbon cable - check continuity between the pin header on the USBTiny and the pins on the ATTiny.

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cykey
 
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Re: avrdude: initialization failed, rc=-1

Post by cykey »

Well, I fixed it. Turns out the pins weren't fully inserted in the ribbon cable's connector. *facedesks*

Thanks

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