Trinket 3v not entering bootloader mode

Adafruit's tiny microcontroller platform. Please tell us which board you are using.
For CircuitPython issues, ask in the Adafruit CircuitPython forum.

Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.
Locked
User avatar
ICortez27
 
Posts: 13
Joined: Thu Aug 05, 2021 11:25 pm

Trinket 3v not entering bootloader mode

Post by ICortez27 »

Hi,
My project is running on a tricket 3v. I was able to enter in bootloader mode to upload my code just fine. Now that I did all the soldering, I need to change my code but can’t get in bootloader mode. For my project, I’m using all the pins including GPIO 3 and 4. I’ve read in the documentation that:
The next 2 pins (GPIO 3-4) are also used for USB programming. That means that when the Trinket is connected to a computer and in bootloader mode or in the middle of uploading a new program, they are used for sending data to/from the computer! It's possible to share these pins if you are careful. The best use of these pins is as outputs to things like LEDs. We didn't want to keep these pins off the board but we strongly recommend not using them unless you're sure you need them since you might have to disconnect any connections to reprogram the Trinket 
Can it be why I can’t get in bootloader mode? Do I have to desolder pin 3 and 4 to fix this?

Thank you

User avatar
Franklin97355
 
Posts: 23903
Joined: Mon Apr 21, 2008 2:33 pm

Re: Trinket 3v not entering bootloader mode

Post by Franklin97355 »

Can you post a picture of your soldering? Also tell us what you have connected to the pins. Thanks.

User avatar
ICortez27
 
Posts: 13
Joined: Thu Aug 05, 2021 11:25 pm

Re: Trinket 3v not entering bootloader mode

Post by ICortez27 »

This is what I have connected:
USB- Lipo breakout
0- audio out
1- button
2- Nothing
3v- connect to 2 10k Pot
3- 10k Pot
4- 10k Pot
Gnd- audio/breakout/button/Pot x2
Bat- lipo breakout

Thank you for the quick reply.
Attachments
79A96213-8C18-4540-BB7A-8DE1E32224FC.jpeg
79A96213-8C18-4540-BB7A-8DE1E32224FC.jpeg (127.39 KiB) Viewed 97 times

User avatar
ICortez27
 
Posts: 13
Joined: Thu Aug 05, 2021 11:25 pm

Re: Trinket 3v not entering bootloader mode

Post by ICortez27 »

For those looking for an answer to this, yes using pin 3 and 4 prevent you to enter in bootloader mode.

User avatar
Franklin97355
 
Posts: 23903
Joined: Mon Apr 21, 2008 2:33 pm

Re: Trinket 3v not entering bootloader mode

Post by Franklin97355 »

Thank you for posting your findings.

Locked
Please be positive and constructive with your questions and comments.

Return to “Trinket ATTiny, Trinket M0”