Hello,
I am trying to enter the bootloader mode on a 5V trinket. After pressing the reset button, the red LED will illuminate for roughly .5 seconds, will dim itself for .5 seconds, and then turn off.
I have attempted entering the bootloader mode with the USB cable plugged in as well as just powering the board from the VBat pin and have received the same result. Additionally, the trinket is currently soldered down to a custom PCB with connections to pins GND, VBAT, 4, 2, 1.
Any ideas as to what might be cause for not being able to enter the bootloader?
Trinket 5V Bootloader Error
Moderators: adafruit_support_bill, adafruit
Please be positive and constructive with your questions and comments.
- adafruit_support_carter
- Posts: 29173
- Joined: Tue Nov 29, 2016 2:45 pm
Re: Trinket 5V Bootloader Error
The USB cable connection is needed:
https://learn.adafruit.com/introducing- ... er-1415914
Are you sure the USB cable is good?
Also, just to point out, the Trinket 5V is a deprecated product:
https://www.adafruit.com/product/1501
https://learn.adafruit.com/introducing- ... er-1415914
Are you sure the USB cable is good?
Also, just to point out, the Trinket 5V is a deprecated product:
https://www.adafruit.com/product/1501
- WilsonLaunchers
- Posts: 3
- Joined: Tue Mar 21, 2023 3:39 pm
Re: Trinket 5V Bootloader Error
Hi Carter,
The USB cable is good! I am able to enter the bootloader mode on other 5V trinkets that I have with the same cable.
The issue I am having is when the board is installed into my custom PCB with pins attached. Ideally, I would like to be able to program the board after it has been soldered in place to make programing changes. Are you still able to enter the bootloader this way?
In a perfect world, I wouldn't have to use the Trinket 5V and could use an M0 to get the job done but none are in stock.
The USB cable is good! I am able to enter the bootloader mode on other 5V trinkets that I have with the same cable.
The issue I am having is when the board is installed into my custom PCB with pins attached. Ideally, I would like to be able to program the board after it has been soldered in place to make programing changes. Are you still able to enter the bootloader this way?
In a perfect world, I wouldn't have to use the Trinket 5V and could use an M0 to get the job done but none are in stock.
- adafruit_support_carter
- Posts: 29173
- Joined: Tue Nov 29, 2016 2:45 pm
Re: Trinket 5V Bootloader Error
It could be a pin conflict issue on #4:
https://learn.adafruit.com/introducing- ... ns-1805108
between USB and your custom PCB connection.
https://learn.adafruit.com/introducing- ... ns-1805108
between USB and your custom PCB connection.
Please be positive and constructive with your questions and comments.