Trinket Pro no red flash

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otto3r
 
Posts: 1
Joined: Sun Jan 03, 2016 3:16 pm

Trinket Pro no red flash

Post by otto3r »

Hi,

I am having trouble with some trinket pro's. Namely I only get the green light, no red light indicating bootloader mode. Because it isn't entering bootloader mode I obviously can't write my own program. So far I have tried 6 pros, all with the same behaviour... The thing that confuses me is that I can use the exact same setup (PC, cable, arduino IDE configuration) to reprogram my very old trinket pro. Just the new ones are giving me problems.

Suspecting it might be the bootloader I tried the Arduino Uno bootloader reprogram method, but it tells me the following:
Adafruit Trinket 5V programmer - June 9 2015

Type 'G' or hit BUTTON for next chip
Starting Program Mode [OK]

Reading signature:950F
Searching for image...
Found "trinket_5V_2015_03_17.hex" for atmega328

Setting fuses
Set Lock Fuse to: 3F -> E000 Set Low Fuse to: FF -> A000 Set High Fuse to: D0 -> A800 Set Ext Fuse to: 5 -> A400
Verifying fuses...
Lock Fuse: 3F is 3F Low Fuse: 0xFF is 0x62Failed to verify fuses
Is there anything I can do to fix the trinkets and get them to work again?

And please let me know if I did something wrong with this post, as it is my first time posting here.

Thanks!

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adafruit_support_carter
 
Posts: 29150
Joined: Tue Nov 29, 2016 2:45 pm

Re: Trinket Pro no red flash

Post by adafruit_support_carter »

Just to verify, you are using these boards:
https://www.adafruit.com/product/2000
and are attempting this bootloader programming process?
https://learn.adafruit.com/introducing- ... bootloader

Are you using an UNO for the programming or some other board?

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